<span style="font-weight: 400;">Persistent bloating. Ongoing diarrhea. Mucus in stool. Unexplained fatigue. Or intense anal itching at night that disrupts sleep.</span>

<span style="font-weight: 400;">These may be early signs of intestinal parasites in adults, yet they are often mistaken for IBS, food intolerance, or a stomach virus. Many people searching for “how do you know if you have parasites?” are surprised to learn that parasite infection symptoms can overlap with common digestive disorders.</span>

<span style="font-weight: 400;">Although intestinal parasites are frequently associated with developing regions, intestinal worms in humans and protozoan infections still occur in the United States every year. According to the CDC, Giardia (giardiasis) remains one of the most frequently reported parasitic infections in the U.S., often linked to contaminated water and outdoor recreation. Globally, the World Health Organization estimates that more than 1.5 billion people are infected with soil-transmitted helminths such as roundworms and hookworms.</span>

<span style="font-weight: 400;">Because symptoms of parasites in humans vary widely — from chronic diarrhea and anemia to bloating after travel — proper diagnosis is essential. Many individuals with persistent digestive symptoms wonder whether they could have worms in humans or another intestinal parasite.</span>

<span style="font-weight: 400;">By the end, you’ll know when to test, what tests are best, and what treatment looks like in the U.S.</span>
<h2>What Are Intestinal Parasites?</h2>
<span style="font-weight: 400;">Intestinal parasites are organisms that live inside the human digestive tract and rely on the host for nutrients and survival. These parasites in humans can interfere with digestion, immune function, and nutrient absorption.</span>

<span style="font-weight: 400;">Many people searching “what are intestinal parasites?” or “what are worms in humans?” are surprised to learn that parasitic infections can occur even in the United States.</span>

<span style="font-weight: 400;">Unlike beneficial gut bacteria, intestinal parasites:</span>
<ul>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Feed on host nutrients</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Reproduce inside the body</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Trigger inflammation in the gut</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Cause anemia or nutrient deficiencies</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Lead to chronic digestive symptoms if untreated</span></li>
</ul>
<span style="font-weight: 400;">There are two main types of intestinal parasites in humans:</span>
<h3>1. Helminths (Intestinal Worms in Humans)</h3>
<span style="font-weight: 400;">Helminths are multicellular parasitic worms. These are commonly referred to as intestinal worms. Some may grow large enough to be visible in the stool.</span>

<span style="font-weight: 400;">Common intestinal worms in humans include:</span>
<h4>Pinworms (Threadworms)</h4>
<span style="font-weight: 400;">The most common worm infection in children in the United States and the United Kingdom is.</span><span style="font-weight: 400;">
</span><span style="font-weight: 400;">Main symptom: intense anal itching at night.</span>
<h4>Roundworms (Ascariasis)</h4>
<span style="font-weight: 400;">Transmitted through contaminated soil or produce. May cause abdominal pain or obstruction in severe cases.</span>
<h4>Whipworms</h4>
<span style="font-weight: 400;">Can contribute to chronic diarrhea and anemia.</span>
<h4>Hookworms</h4>
<span style="font-weight: 400;">Enter through bare skin (often feet). Can cause iron-deficiency anemia and fatigue.</span>
<h4>Strongyloides</h4>
<span style="font-weight: 400;">Capable of autoinfection (reinfecting the body internally), allowing infection to persist for years.</span>
<h4>Tapeworms</h4>
<span style="font-weight: 400;">Contracted from undercooked pork, beef, or fish. May cause mild digestive symptoms or visible segments in stool.</span>
<h3>2. Protozoa (Microscopic Intestinal Parasites)</h3>
<span style="font-weight: 400;">Protozoa are single-celled parasites that multiply inside the intestines and are a common cause of prolonged diarrhea in the U.S.</span>

<span style="font-weight: 400;">Common protozoan infections include:</span>
<h4>Giardia (Giardiasis)</h4>
<span style="font-weight: 400;">Often linked to untreated lake or stream water. Causes watery diarrhea, bloating, gas, and foul-smelling stool.</span>
<h4>Cryptosporidium</h4>
<span style="font-weight: 400;">Associated with swimming pool or recreational water outbreaks.</span>
<h4>Entamoeba histolytica</h4>
<span style="font-weight: 400;">May cause bloody diarrhea and abdominal pain.</span>
<h4>Cyclospora</h4>
<span style="font-weight: 400;">Often linked to imported fresh produce.</span>
<h4>Blastocystis</h4>
<span style="font-weight: 400;">Frequently detected in stool testing; symptoms vary.</span>

<span style="font-weight: 400;">Because protozoa multiply within the gut, symptoms of parasite infection may persist without treatment.</span>
<h2>How Common Are Intestinal Parasites?</h2>
<span style="font-weight: 400;">Many people assume intestinal parasites only affect developing countries. However, digestive parasites remain one of the most widespread infections globally — and cases still occur in the United States every year.</span>

<span style="font-weight: 400;">Understanding how common parasites are helps explain why persistent digestive symptoms should not be ignored.</span>
<h3>Global Prevalence of Intestinal Parasites</h3>
<span style="font-weight: 400;">Intestinal parasites continue to affect billions of people worldwide.</span>
<ul>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">More than </span><b>1.5 billion people</b><span style="font-weight: 400;"> are infected with soil-transmitted helminths (intestinal worms), according to global health estimates.</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Ascariasis (roundworm infection) affects approximately </span><b>1 billion individuals globally</b><span style="font-weight: 400;">.</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Hookworm and whipworm infections remain common in tropical and subtropical regions.</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">In areas with limited sanitation, infection rates may exceed </span><b>50% of the population</b><span style="font-weight: 400;">.</span></li>
</ul>
<span style="font-weight: 400;">While intestinal worm infections are more common in developing regions, globalization, travel, food importation, and migration mean that exposure risk is not limited by geography.</span>
<h3>How Common Are Parasites in the United States?</h3>
<span style="font-weight: 400;">Although sanitation standards are higher in the U.S., intestinal parasites have not been eliminated.</span>

<span style="font-weight: 400;">Parasitic infections reported in the United States include:</span>
<h4>Giardia (Giardiasis)</h4>
<span style="font-weight: 400;">One of the most frequently reported parasitic infections in the U.S. is often linked to contaminated drinking water, hiking, camping, and untreated lakes or streams.</span>
<h4>Pinworms (Threadworms)</h4>
<span style="font-weight: 400;">Common in daycare centers, schools, and households with young children. Pinworms are one of the most common worm infections in American children.</span>
<h4>Cryptosporidium</h4>
<span style="font-weight: 400;">Associated with recreational water outbreaks, including swimming pools and water parks.</span>
<h4>Strongyloidiasis</h4>
<span style="font-weight: 400;">More prevalent in parts of Appalachia and the southeastern United States, especially in areas with historical sanitation gaps.</span>

<span style="font-weight: 400;">While the overall risk of intestinal parasites in the U.S. is lower than in many tropical countries, infections still occur each year — particularly among travelers, outdoor enthusiasts, children, and immunocompromised individuals.</span>
<h2>Symptoms of Intestinal Parasites (Signs in Adults &amp; Children)</h2>
<span style="font-weight: 400;">Symptoms of intestinal parasites vary depending on the type of parasite, infection severity, immune status, and how long the infection has been present.</span>

<span style="font-weight: 400;">Some people experience obvious digestive distress. Others may have mild or no symptoms at first, which is why parasite infections are sometimes mistaken for IBS, food intolerance, or a stomach virus.</span>

<span style="font-weight: 400;">Many people searching “how do you know if you have parasites?” are experiencing one or more of the symptoms below.</span>
<h3>Common Signs of Parasites in Adults</h3>
<span style="font-weight: 400;">The most common symptoms of parasites in adults include:</span>
<ul>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Chronic or intermittent diarrhea</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Abdominal cramps or stomach pain</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Gas and persistent bloating</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Bloating after travel or camping</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Nausea</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Unexplained fatigue</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Anal itching at night (classic sign of pinworms)</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Mucus in stool</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Foul-smelling stool</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Irregular bowel movements</span></li>
</ul>
<span style="font-weight: 400;">These intestinal parasite symptoms are frequently confused with IBS or food sensitivities.</span>
<h3>Worm Symptoms in Humans</h3>
<span style="font-weight: 400;">Certain intestinal worms may cause more specific symptoms:</span>
<ul>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Iron-deficiency anemia (common with hookworms)</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Visible white worms or rice-like segments in stool</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Intense nighttime anal itching (pinworms)</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Abdominal discomfort or obstruction (rare, heavy roundworm infection)</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Unexplained weight loss</span></li>
</ul>
<h3>Moderate to Severe Parasite Infection Symptoms</h3>
<span style="font-weight: 400;">More serious infections may cause:</span>
<ul>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Persistent watery diarrhea</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Chronic diarrhea lasting more than 1–2 weeks</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Dehydration</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Nutrient deficiencies</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Weakness or dizziness</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Elevated eosinophils (eosinophilia on blood testing)</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Ongoing unexplained anemia</span></li>
</ul>
<span style="font-weight: 400;">In immunocompromised individuals, certain parasites (such as Strongyloides) can cause severe complications.</span>
<h3><strong>Can Parasites Cause Brain Fog, Skin Issues, or Fatigue?</strong></h3>
<span style="font-weight: 400;">In chronic or prolonged infections, some individuals report:</span>
<ul>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Brain fog</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">General weakness</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Low energy</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Mild skin irritation or rashes (less common)</span></li>
</ul>
<span style="font-weight: 400;">These symptoms are nonspecific and require medical evaluation, as many other conditions can cause similar complaints.</span>
<h2>How Long After Exposure Do Parasite Symptoms Start? (Incubation Timeline)</h2>
<span style="font-weight: 400;">The incubation period depends on the type of parasite, the amount of exposure, and your immune system. Some infections cause symptoms quickly, while others may take weeks or even months to appear.</span>
<h3>Common Incubation Timelines (Approximate)</h3>
<ul>
 	<li style="font-weight: 400;" aria-level="1"><b>Giardia (Giardiasis):</b><span style="font-weight: 400;"> Usually </span><b>1–2 weeks</b><span style="font-weight: 400;"> after exposure (range: 3–25 days)</span></li>
 	<li style="font-weight: 400;" aria-level="1"><b>Cryptosporidium:</b><span style="font-weight: 400;"> Typically </span><b>2–10 days</b><span style="font-weight: 400;"> (often about 1 week)</span></li>
 	<li style="font-weight: 400;" aria-level="1"><b>Pinworms (Threadworms):</b><span style="font-weight: 400;"> Symptoms such as nighttime itching may begin </span><b>2–6 weeks</b><span style="font-weight: 400;"> after ingesting eggs</span></li>
 	<li style="font-weight: 400;" aria-level="1"><b>Ascaris (Roundworms):</b><span style="font-weight: 400;"> Symptoms may develop </span><b>weeks to months</b><span style="font-weight: 400;"> later</span></li>
 	<li style="font-weight: 400;" aria-level="1"><b>Hookworms:</b><span style="font-weight: 400;"> Skin entry may cause mild symptoms quickly, but anemia can develop over </span><b>weeks</b></li>
 	<li style="font-weight: 400;" aria-level="1"><b>Strongyloides:</b><span style="font-weight: 400;"> Symptoms are variable and may persist for </span><b>years</b><span style="font-weight: 400;"> if untreated</span></li>
</ul>
<span style="font-weight: 400;">If you traveled, camped, or drank untreated water weeks ago and now have persistent digestive symptoms, the incubation timeline may explain the delay.</span>
<h2>Can You Have Parasites Without Symptoms?</h2>
<span style="font-weight: 400;">Yes.</span>

<span style="font-weight: 400;">Some individuals with intestinal parasites have no obvious symptoms, especially in early stages or mild infections. However, untreated parasites may still interfere with nutrient absorption and gut function over time.</span>

<span style="font-weight: 400;">This is why laboratory testing is necessary to confirm whether symptoms are due to a parasitic infection or another digestive condition.</span>
<h2>Parasites vs IBS: How to Tell the Difference</h2>
<span style="font-weight: 400;">Many people confuse intestinal parasites with Irritable Bowel Syndrome (IBS) because the symptoms can overlap.</span>

<span style="font-weight: 400;">Here is a simplified comparison:</span>
<table>
<tbody>
<tr>
<td><b>Feature</b></td>
<td><b>IBS</b></td>
<td><b>Intestinal Parasites</b></td>
</tr>
<tr>
<td><span style="font-weight: 400;">Trigger</span></td>
<td><span style="font-weight: 400;">Stress, food sensitivity</span></td>
<td><span style="font-weight: 400;">Contaminated food/water, travel, daycare</span></td>
</tr>
<tr>
<td><span style="font-weight: 400;">Fever</span></td>
<td><span style="font-weight: 400;">Rare</span></td>
<td><span style="font-weight: 400;">Possible</span></td>
</tr>
<tr>
<td><span style="font-weight: 400;">Nighttime anal itching</span></td>
<td><span style="font-weight: 400;">No</span></td>
<td><span style="font-weight: 400;">Yes (pinworms)</span></td>
</tr>
<tr>
<td><span style="font-weight: 400;">Persistent watery diarrhea</span></td>
<td><span style="font-weight: 400;">Sometimes</span></td>
<td><span style="font-weight: 400;">Common (Giardia, Crypto)</span></td>
</tr>
<tr>
<td><span style="font-weight: 400;">Mucus in stool</span></td>
<td><span style="font-weight: 400;">Possible</span></td>
<td><span style="font-weight: 400;">Possible</span></td>
</tr>
<tr>
<td><span style="font-weight: 400;">Iron-deficiency anemia</span></td>
<td><span style="font-weight: 400;">Uncommon</span></td>
<td><span style="font-weight: 400;">Possible (hookworms)</span></td>
</tr>
<tr>
<td><span style="font-weight: 400;">Eosinophilia on blood test</span></td>
<td><span style="font-weight: 400;">No</span></td>
<td><span style="font-weight: 400;">Possible (worm infections)</span></td>
</tr>
<tr>
<td><span style="font-weight: 400;">Confirmed by stool test</span></td>
<td><span style="font-weight: 400;">No</span></td>
<td><span style="font-weight: 400;">Yes</span></td>
</tr>
</tbody>
</table>
<h2>Causes and Transmission of Intestinal Parasites</h2>
<span style="font-weight: 400;">Many people ask: </span><b>How do you get parasites?</b>

<span style="font-weight: 400;">Most intestinal parasites in humans are transmitted when microscopic eggs, larvae, or cysts are accidentally ingested. In some cases, certain worms can enter directly through the skin.</span>

<span style="font-weight: 400;">Understanding how parasites spread is essential for prevention and avoiding reinfection.</span>
<h3>How Do People Get Intestinal Parasites?</h3>
<span style="font-weight: 400;">Common ways people get parasites include:</span>
<ul>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Drinking contaminated water (untreated lakes, streams, or municipal water failures)</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Eating undercooked meat, especially pork, beef, or wild game</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Consuming raw or undercooked fish (risk of anisakiasis)</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Eating unwashed fruits and vegetables</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Poor hand hygiene after using the bathroom or changing diapers</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Soil exposure in areas with inadequate sanitation</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Close household contact (especially with pinworms)</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Daycare or school exposure</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Contact with pet feces (toxocariasis and certain roundworms)</span></li>
</ul>
<span style="font-weight: 400;">Parasite eggs are microscopic and cannot be seen without laboratory testing, which is why infections may occur without obvious exposure.</span>
<h3>Can Parasites Enter Through the Skin?</h3>
<span style="font-weight: 400;">Yes.</span>

<span style="font-weight: 400;">Some intestinal worms — particularly hookworms and Strongyloides — can penetrate the skin.</span>

<span style="font-weight: 400;">This usually occurs when:</span>
<ul>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Walking barefoot on contaminated soil</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Contacting soil in areas with poor sanitation</span></li>
</ul>
<span style="font-weight: 400;">Although less common in most urban U.S. environments, this route of transmission still occurs in certain rural regions.</span>
<h3>How Long Do Parasite Eggs Live on Surfaces?</h3>
<span style="font-weight: 400;">Parasite eggs can survive on surfaces for days to weeks, depending on the species and environmental conditions.</span>

<span style="font-weight: 400;">This increases the risk of reinfection — especially in household outbreaks.</span>

<span style="font-weight: 400;">Common contamination sites include:</span>
<ul>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Bed linens</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Bathroom surfaces</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Toys</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Door handles</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Clothing</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Under fingernails (especially in children)</span></li>
</ul>
<span style="font-weight: 400;">Pinworms are particularly contagious because eggs are easily transferred from hands to bedding and surfaces.</span>
<h3>Why Reinfection Happens</h3>
<span style="font-weight: 400;">Reinfection is common with certain parasites, especially pinworms and Strongyloides.</span>

<span style="font-weight: 400;">If hygiene measures are not maintained during and after treatment, parasite eggs may be reintroduced into the body. This is one reason symptoms sometimes return even after medication.</span>
<h2>Risk Factors for Intestinal Parasites</h2>
<span style="font-weight: 400;">While anyone can develop intestinal parasites, certain individuals are at higher risk of infection.</span>

<span style="font-weight: 400;">Understanding parasite risk factors helps identify when testing may be appropriate.</span>
<h3>Who Is Most at Risk for Parasites?</h3>
<span style="font-weight: 400;">Higher-risk groups include:</span>
<ul>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">International travelers, especially to tropical or subtropical regions</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Children in daycare or school settings</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Individuals without reliable access to clean drinking water</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Rural agricultural workers with regular soil exposure</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">People living in areas with historical sanitation gaps</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Immunocompromised individuals (including those on immunosuppressive medications)</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Households with an infected family member</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Campers and hikers exposed to untreated lake or stream water</span></li>
</ul>
<span style="font-weight: 400;">Travel-related exposure remains one of the most common triggers for parasite infection symptoms in adults.</span>
<h3>Parasites and Children: Increased Risk</h3>
<span style="font-weight: 400;">Children are particularly vulnerable due to:</span>
<ul>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Close contact in daycare environments</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Incomplete hand hygiene</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Nail biting</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Shared toys and bedding</span></li>
</ul>
<span style="font-weight: 400;">Pinworms are especially common among school-aged children.</span>
<h3>Can Pets Give You Parasites?</h3>
<span style="font-weight: 400;">Yes, in certain cases.</span>

<span style="font-weight: 400;">Dogs and cats may carry parasites such as roundworms and hookworms. Humans can become infected through accidental ingestion of parasite eggs from contaminated soil or pet feces.</span>

<span style="font-weight: 400;">Risk is reduced by:</span>
<ul>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Regular veterinary deworming</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Washing hands after handling pets</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Proper disposal of pet waste</span></li>
</ul>
<h2>Complications of Untreated Intestinal Parasites</h2>
<span style="font-weight: 400;">Many intestinal parasites cause mild symptoms. However, untreated or prolonged infections can lead to serious health complications — especially in children, older adults, and immunocompromised individuals.</span>
<h3>What Happens If Parasites Go Untreated?</h3>
<span style="font-weight: 400;">Possible complications of intestinal parasites include:</span>
<ul>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Severe dehydration from persistent diarrhea</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Malnutrition due to impaired nutrient absorption</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Iron-deficiency anemia (common with hookworm infections)</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Unexplained weight loss</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Vitamin deficiencies</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Intestinal blockage (rare but possible with heavy roundworm infections)</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Organ inflammation in invasive infections</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Hyperinfection syndrome (a life-threatening complication of untreated Strongyloides in immunosuppressed individuals)</span></li>
</ul>
<span style="font-weight: 400;">Chronic parasite infection symptoms may also contribute to:</span>
<ul>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Ongoing fatigue</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Growth delay in children</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Cognitive or concentration difficulties (especially in prolonged anemia)</span></li>
</ul>
<span style="font-weight: 400;">Early diagnosis significantly reduces the risk of long-term complications.</span>
<h2>Diagnosis and Testing for Intestinal Parasite Infection</h2>
<span style="font-weight: 400;">If you suspect intestinal worms or protozoan infection, laboratory confirmation is essential.</span>

<span style="font-weight: 400;">Symptoms alone cannot reliably diagnose parasites because many digestive disorders, including IBS and viral gastroenteritis, mimic parasite infection symptoms.</span>
<h3>What Is the Best Test for Parasites?</h3>
<span style="font-weight: 400;">The most commonly used tests include:</span>
<h4>1. Stool Ova and Parasite (O&amp;P) Test</h4>
<ul>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Detects parasite eggs (ova), larvae, or organisms</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Often requires 2–3 separate stool samples</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">May identify worms, protozoa, or cysts</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Repeated sampling improves detection accuracy</span></li>
</ul>
<span style="font-weight: 400;">Because parasite shedding may be intermittent, a single negative test does not always rule out infection.</span>
<h4>2. PCR or Antigen Testing</h4>
<span style="font-weight: 400;">Modern molecular tests detect parasite DNA and are often more sensitive than traditional microscopy for:</span>
<ul>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Giardia</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Cryptosporidium</span></li>
</ul>
<span style="font-weight: 400;">These tests are increasingly used in U.S. laboratories.</span>
<h4>3. Scotch Tape Test (Pinworm Test)</h4>
<span style="font-weight: 400;">Used specifically to diagnose pinworms.</span>
<ul>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Tape is applied around the anal area in the morning</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Eggs are identified under a microscope</span></li>
</ul>
<h4>4. Blood Tests</h4>
<span style="font-weight: 400;">Bloodwork may show:</span>
<ul>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Iron-deficiency anemia</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Eosinophilia (elevated eosinophils), which may suggest certain worm infections</span></li>
</ul>
<h4>5. Imaging (Rare Cases)</h4>
<span style="font-weight: 400;">CT scan or ultrasound may be used if complications such as obstruction or organ involvement are suspected.</span>
<h3>Why Self-Diagnosis Is Risky</h3>
<span style="font-weight: 400;">Searching for “parasites in stool pictures” or relying on online symptom checklists is unreliable.</span>

<span style="font-weight: 400;">Many non-parasitic digestive conditions cause similar symptoms. Proper laboratory testing ensures accurate diagnosis and targeted treatment.</span>
<h2>Treatment Options for Intestinal Parasites (U.S. Standard of Care)</h2>
<span style="font-weight: 400;">Treatment depends on the specific parasite identified. Prescription medications are the standard of care in the United States.</span>
<h3>Common Parasite Medications in the U.S.</h3>
<table>
<tbody>
<tr>
<td><b>Parasite Type</b></td>
<td><b>Common U.S. Medications</b></td>
</tr>
<tr>
<td><span style="font-weight: 400;">Pinworms</span></td>
<td><span style="font-weight: 400;">Pyrantel pamoate, Albendazole</span></td>
</tr>
<tr>
<td><span style="font-weight: 400;">Roundworms / Hookworms / Whipworms</span></td>
<td><span style="font-weight: 400;">Albendazole, Mebendazole</span></td>
</tr>
<tr>
<td><span style="font-weight: 400;">Strongyloidiasis</span></td>
<td><span style="font-weight: 400;">Ivermectin</span></td>
</tr>
<tr>
<td><span style="font-weight: 400;">Tapeworms</span></td>
<td><span style="font-weight: 400;">Praziquantel</span></td>
</tr>
<tr>
<td><span style="font-weight: 400;">Giardia</span></td>
<td><span style="font-weight: 400;">Metronidazole, Tinidazole, Nitazoxanide</span></td>
</tr>
<tr>
<td><span style="font-weight: 400;">Cryptosporidium</span></td>
<td><span style="font-weight: 400;">Nitazoxanide (in some cases)</span></td>
</tr>
<tr>
<td><span style="font-weight: 400;">Cyclospora</span></td>
<td><span style="font-weight: 400;">TMP-SMX</span></td>
</tr>
</tbody>
</table>
<h3>How Long Does Parasite Treatment Take?</h3>
<ul>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Some infections resolve with a single dose</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Others require 3–14 days of medication</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Strongyloidiasis may require repeat treatment</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Household members may need simultaneous treatment (pinworms)</span></li>
</ul>
<span style="font-weight: 400;">Always complete the full prescribed course.</span>
<h3>Preventing Reinfection During Treatment</h3>
<span style="font-weight: 400;">To reduce reinfection risk:</span>
<ul>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Wash bedding and clothing daily (especially for pinworms)</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Trim fingernails</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Practice strict hand hygiene</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Clean bathroom surfaces regularly</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Avoid barefoot exposure in contaminated soil</span></li>
</ul>
<span style="font-weight: 400;">Reinfection cycles are common in household outbreaks.</span>
<h3>Pregnancy and Special Considerations</h3>
<span style="font-weight: 400;">Certain anti-parasitic medications may not be recommended during pregnancy.</span>

<span style="font-weight: 400;">Immunocompromised individuals require careful medical supervision, particularly with Strongyloides due to hyperinfection risk.</span>

<span style="font-weight: 400;">Always consult a licensed healthcare provider before starting treatment.</span>
<h2>Digestive Recovery After Parasite Treatment</h2>
<span style="font-weight: 400;">After prescription therapy, some individuals focus on restoring digestive balance and supporting overall gut health.</span>

<span style="font-weight: 400;">Important: Dietary supplements do not replace medical treatment for confirmed parasitic infections.</span>
<h3>Supporting Gut Recovery</h3>
<span style="font-weight: 400;">Post-treatment </span><a href="https://mahoneyinter.com/7-best-gut-reset-cleanse-tips/"><b>gut recovery</b></a><span style="font-weight: 400;"> may include:</span>
<ul>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Small, easy-to-digest meals</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Electrolyte replenishment</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Gradual fiber reintroduction</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Probiotic-rich foods (if tolerated)</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Adequate protein intake</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Iron restoration if anemia occurred</span></li>
</ul>
<span style="font-weight: 400;">Digestive function may take several weeks to normalize after prolonged diarrhea.</span>
<h3>Structured 4-Step Recovery Framework</h3>
<h3>Step 1: Confirm Diagnosis</h3>
<span style="font-weight: 400;">Accurate lab testing ensures correct identification.</span>
<h3>Step 2: Complete Prescription Therapy</h3>
<span style="font-weight: 400;">Stopping early may cause persistent infection or reinfection.</span>
<h3>Step 3: Restore Hydration &amp; Nutrition</h3>
<span style="font-weight: 400;">Focus on electrolyte balance and nutrient recovery.</span>
<h3>Step 4: Support Gut &amp; Liver Function</h3>
<span style="font-weight: 400;">Prioritize digestive enzyme balance, microbiome stability, and metabolic recovery.</span>
<h2>Digestive Wellness Support Options from Mahoney Inter Supplements</h2>
<span style="font-weight: 400;">During recovery, some individuals choose to incorporate structured digestive wellness support into their routine. Mahoney Supplements offers formulations designed to support healthy digestive balance and normal metabolic detox pathways. Options such as </span><b>Paragon Cleanse</b><span style="font-weight: 400;">, </span><a href="https://mahoneyinter.com/product/activated-charcoal/"><b>Activated Charcoal Binder</b></a><span style="font-weight: 400;">, and </span><b>TNM Liver Support</b><span style="font-weight: 400;"> are commonly used as part of broader wellness plans following medical treatment. These supplements are intended to support overall gut and liver function and are not a substitute for physician-directed therapy.</span>
<h2>Prevention Checklist for Intestinal Parasites</h2>
<ul>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Wash your hands thoroughly</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Cook meat to safe temperatures</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Avoid untreated water</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Wash produce carefully</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Trim fingernails</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Wash bedding during pinworm outbreaks</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Wear shoes in high-risk soil areas</span></li>
</ul>
<span style="font-weight: 400;">Safe cooking temperatures:</span>
<ul>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Beef/pork (whole cuts): 145°F</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Ground meat: 160°F</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Poultry: 165°F</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Fish: 145°F</span></li>
</ul>
<h2>When to Seek Medical Care for Parasites</h2>
<span style="font-weight: 400;">Seek evaluation if you experience:</span>
<ul>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Diarrhea lasting more than 1–2 weeks</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Bloody stool</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Persistent abdominal pain</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Unexplained anemia</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Anal itching at night</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Recent travel exposure</span></li>
</ul>
<span style="font-weight: 400;">Seek emergency care for:</span>
<ul>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Severe dehydration</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">High fever</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Severe abdominal pain</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Signs of intestinal obstruction</span></li>
</ul>
<h2>FAQs</h2>
<h4>How do you know if you have intestinal parasites?</h4>
<span style="font-weight: 400;">Common signs of intestinal parasites include chronic diarrhea, bloating, abdominal cramps, anal itching at night, unexplained fatigue, iron-deficiency anemia, and mucus in stool. However, symptoms alone are not enough to confirm infection. The only reliable way to diagnose worm infection is through laboratory testing such as stool ova and parasite (O&amp;P) exams or PCR testing.</span>
<h4>What are the most common parasite symptoms in adults?</h4>
<span style="font-weight: 400;">The most common parasite symptoms in adults include:</span>
<ul>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Persistent diarrhea</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Gas and bloating</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Abdominal discomfort</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Fatigue</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Unexplained weight loss</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Iron-deficiency anemia</span></li>
 	<li style="font-weight: 400;" aria-level="1"><span style="font-weight: 400;">Anal itching (especially at night)</span></li>
</ul>
<span style="font-weight: 400;">Symptoms vary depending on the type of parasite and severity of infection.</span>
<h4>Can intestinal parasites go away on their own?</h4>
<span style="font-weight: 400;">Some mild protozoan infections may resolve without treatment. However, most intestinal worm infections require prescription medication to fully eliminate the parasite and prevent reinfection or complications</span>
<h4>What is the best test for parasites?</h4>
<span style="font-weight: 400;">The most commonly used diagnostic test is a stool ova and parasite (O&amp;P) examination. Doctors may request 2–3 stool samples to improve accuracy. PCR testing is also increasingly used because it can detect parasite DNA and may be more sensitive for infections such as Giardia and Cryptosporidium.</span>
<h4>How long can parasites live in your body?</h4>
<span style="font-weight: 400;">The lifespan depends on the parasite type. Some worms may survive for months or years if untreated. Strongyloides, for example, can persist for decades due to its ability to reinfect the body internally (autoinfection).</span>
<h4>How do people get parasites?</h4>
<span style="font-weight: 400;">People typically get intestinal parasites by ingesting microscopic eggs or cysts from contaminated food, water, soil, or surfaces. Some parasites, such as hookworms, can also enter through the skin when walking barefoot on contaminated soil.</span>
<h4>Can pets give humans parasites?</h4>
<span style="font-weight: 400;">Yes. Dogs and cats can carry certain parasites, including roundworms and hookworms. Humans may become infected through accidental ingestion of parasite eggs from contaminated soil or pet feces. Proper hygiene and regular veterinary care reduce risk.</span>
<h4>Do parasite cleanses really work?</h4>
<span style="font-weight: 400;">Dietary “parasite cleanse” products are not a substitute for medical diagnosis and prescription treatment. While some supplements support digestive wellness, confirmed parasitic infections require physician-directed therapy.</span>
<h4>What happens if parasites are left untreated?</h4>
<span style="font-weight: 400;">Untreated intestinal parasites can lead to complications such as dehydration, malnutrition, anemia, vitamin deficiencies, and, in rare cases, intestinal obstruction. Early diagnosis significantly reduces the risk of serious health problems.</span>
<h4>How long does parasite treatment take?</h4>
<span style="font-weight: 400;">Treatment duration varies depending on the parasite. Some infections resolve with a single dose of medication, while others require 3–14 days of therapy. Strongyloidiasis may require repeat treatment and close monitoring.</span>