Ascariasis (Roundworm)

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They usually affect the small intestine.

Causes

  • Ascaris lumbricoides

Signs and symptoms

May be asymptomatic. Features may include:

  • Abdominal discomfort
  • Large swollen abdomen in children
  • Vomiting
  • Expulsion of roundworm

Investigations

  • Stool microscopy for occult blood, ova and parasites

Pharmacological treatment

Mebendazole oral

Adult:

500mg as a single dose

OR

100 mg every 12 hours for 3 days

First-trimester pregnancy: Not recommended

Child:

1 – 17 years: 100mg every 12 hours for 3 days

OR

500mg as a single dose

Below 12 months: Not recommended 

 

Albendazole oral

Adult:

400 mg as a single dose

First-trimester pregnancy: Not recommended

Child:

1- 2 years: 200 mg as a single dose

2 – 17 years: 400 mg as a single dose

Less than 1 year: Not recommended

 

OR

Levamisole oral

Adult:

120mg to 150mg as a single dose

Child:

2.5-3mg/kg (maximum 150mg) as a single dose