Hymenolepsi nana infection (dwarf tapeworm infection)

Notes
  • Prevalence among children with diarrhea in Kiambu, Kenya, is 3.8%
  • It is the most common human cestode.
  • Statistics: Size of an adult worm - 15 to 40 mm; life-span - 4 to 6 wks.
  1. Transmission
  • The life-cycle follows 3 different pathways:

_Internal auto-infection: occurs when eggs hatch within the intestines and proceed to a 2nd generation within the same host.

_External auto-infection: anal-oral transmission of eggs within the same individual.

_Human-to-human oral-anal cycle: eggs are passed from one human to another

_Indirect 2-host: rodents (definitive hosts) to insects (such as fleas feed on the rodents stools) to human (via ingestion of insects)

Symptoms
  • Mainly asymptomatic
  • Nausea
  • Vomiting
  • Diarrhea
  • Abdominal pain
  • Weight loss
  • Pruritis ani
Diagnosis
  • Stool microscopy (for eggs)
Management

Either,

_Tabs Praziquantel 25 mg/kg Stat

Or;

_Tabs Niclosamid 500mg:Over 12 years: 4OD. 6-12 years: 2-4 OD. 2-6 years: 2 OD. The dosage is for 7 days.

Or;

_Tabs Nitazoxanide: adults 500 mg  OD x 3/7. 1-3yrs: 100 mg OD x 3/7. 4-11yrs: 200 mg OD x 3/7

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