Taenia saginata infection (beef tapeworm infection)

Notes
  • Definitive host is human while intermediate hosts are cattle.
  • Proglottids are motile and they shed eggs during their movements.
  • Statistics: Size of an adult worm - 4 to 10 m; number of worm infection per person - 1 or 2; number of years that a worm can live - 25.
    1. Transmission
    • Life cycle

    _Adult worms in small intestine of human host.

    _In each mature proglottid (as a hermaphrodite) self-fertilizes occurs to produce zygotes that multiply and differentiate into embryonated eggs (oncospheres).

    _Oncopheres and gravid proglottids are shed in stool.

    _Oncopheres and gravid proglottids are ingested by cattle.

    _Hexacanths (six-hooked larvae) are hatched.

    _ Hexacanths penetrate the intestinal wall into the blood stream and they settle in the skeletal muscles and to a small extent in lungs and liver (within 70 days)

    _Hexacanths transform into a cyst known as cystcerci bovi.

    _Human host feed on beef contaminated with cystcerci bovi.

    _The enzymatically released scolex  from cystcerci bovi attaches itself on the intestinal wall and mature (5-12 wks)

Symptoms
  • Abdominal pain
  • Mainly asymptomatic
Diagnosis
  • Motile proglottids and eggs in the stool
  • Eggs in the anal swab
Management

Either,

_Tabs Praziquantel 25 mg/kg TID X 2/7

Or;

Over 2 years: (children and adults): _Tabs/susp Albendazole 400mg OD x 3/7

Or;

_Tabs Niclosamid: Over 12 years: 4 stat or 2 stat then 2 after one hour. 6-12 years: 1-2 initially followed by 1-2 after one hour. 2-6 years: 1 stat then 1 after one hour.

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