CILIATES
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CILIATES. Balantidium coli only ciliate infecting humans large and diverse group majority are free-living covered with rows of cilia defining characteristic is nuclear dimorphism micronucleus (genetic) macronucleus (somatic) sexual reproduction involving conjugation. Ciliate Reproduction.

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CILIATES

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Ciliates

CILIATES

  • Balantidium coli only ciliate infecting humans

  • large and diverse group

    • majority are free-living

  • covered with rows of cilia

  • defining characteristic is nuclear dimorphism

    • micronucleus (genetic)

    • macronucleus (somatic)

  • sexual reproduction involving conjugation


Ciliates

Ciliate Reproduction


Ciliates

Balantidium coli

Balantidosis

  • aka, balantidiasis, balantidial dysentery

  • symptoms: acute diarrhea with mucus and blood, cramps

  • diagnosis: identify cyst or trophozoite in feces

  • treatment: tetracycline or iodoquinol

  • prevention: same as other fecal-oral diseases

  • world-wide distribution

    • especially prevalent in tropics

    • rarely exceeds 1%

  • common in pigs and monkeys

    • unlikely to be reservoirs

  • usually non-pathogenic commensal in l. intestine

  • can invade intestinal epithelium and cause ulceration with dysentery-like symptoms


Ciliates

Balantidium coli

~70 x 45 m

(up to 200 m)

~55 m


Ciliates

unstained

trichrome

eosin


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