Ascaris infection is brought on by Ascaris lumbricoides, an intestinal roundworm, or, on occasion, by Ascaris suum (which causes ascariasis in pigs). It is one of the most prevalent worm diseases globally, although it is rare in the United States.

Moreover, ascariasis is especially prevalent in regions without contemporary sanitation. The parasite is transmitted by contaminated food and drink. Usually, there are no symptoms associated with this illness; however, heavier infestations (a large number of roundworms) might cause issues in the lungs or intestines.


The majority of ascariasis patients exhibit no signs or symptoms. Moderate to severe infestations generate a variety of indications and symptoms, depending on the portion of your body that is afflicted.

Roundworms in the lungs may result in:

  • wheezing or shortness of breath
  • fever
  • blood in mucus
  • chest discomfort
  • coughing or gagging
  • aspiration pneumonia (rarely)

Roundworms in the intestines may result in:

  • Diarrhea or feces with blood
  • Vague abdominal ache
  • Sickness and vomiting

If you have a large number of worms in your intestine, you may be at risk for the following:

  • Loss of body mass or malnutrition
  • Vomiting
  • Worms in the vomit or feces
  • Extreme abdominal distress
  • Fatigue


Examining a stool sample for worms and eggs is often how doctors establish a diagnosis. If your physician believes that you have ascariasis, he or she will request a stool sample.

If you are diagnosed with an Ascaris infection, you may require further imaging tests, such as:

  • MRI scan
  • Endoscopy
  • X-ray
  • CT scan
  • Ultrasound

In order to assess your risk for problems, your doctor must identify how long you’ve been infected.


Antiparasitic medicines are often used to treat Ascaris infection. The most widely utilized medications include:

  • Mebendazole (Vermox)
  • Albendazole (Albenza)
  • Ivermectin (Stromectol)

If your condition is advanced, you may need other therapy. Your physician may propose surgery to eliminate a severe infestation. If the roundworms totally obstruct your intestines, you’ll require surgery.

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