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4 Cards in this Set
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- Back
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Trichomonadida
Histomonas meleagridis |
Infectious enterohepatitis
Turkey poults, chickens asymptomatic - "sick bird" anorexic, listless. 10-14 day incubation Enlarged ceca wall, cheesy core Concave circular liver foci Trophozoite - NO cyst - Localizes in lumen of ceca - Initially extracellular amoeboid w/ flagellum - Invades cecal wall -> no flagella, destroys tissue - Extend to liver via venous blood - Asexual repro Food/water contaminated w/feces Paratenic hosts - larvated eggs of cecal worm (Heterakis) - Earthworms serve as host for Heterakis No drugs available to treat Anthelmintics to remove Heterakis |
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Trichomonas gallinae
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Canker - pigeons/doves, usually nestlings
- Adult to young via crop milk, adult-adult courtship, H20 contam Frounce - birds of prey (eat pigeon) & poultry (eat food/H20 contaminated by pigeon) Not eating, dysphagia, wt loss Pseudo-membrane in oral cavity, caseous yellow plaque Oral-oral transmission of trophozoites- No cyst stage Asexual reprod Dx - organism in crop fluid/lesions, PCR 4 anterior flagella, 1 recurrent flagellum (forms undulating membrane) Tx - Metronidizole in water |
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Tritrichomonas foetus
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Cow venereal disease - worldwide, prevalent in older bulls, beef herds. Seen in shelter cats
Pyometra. Early embryonic death/abortion (1/3 of gestation usually) - Return to estrus, appears as irregular estrus cycle Develop short-term immunity, regain fertility - Calf carried to term, next breeding season can be re-infected Bull - asymptomatic Trophozoite stage, NO cyst Mechanical transmission during sex Iatrogenic. Bull-to-bull possible by sharing artificial vagina Pleomorphic, usually oval, 3 anterior flagella, undulating membrane Jerky motion, posterior can be pointed Dx - direct exam/culture, ABI Trich test (DNA) Tx - no drugs, vax is available (helps clear, does NOT prevent) |
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Feline trichomoniasis
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Trichomonad indistinguishable from T. foetus
Large bowel diarrhea Shelter cats/cat colonies Direct contact Cow pie stools, incr freq Inflamed anus Dx - InPouch Tx - Recover w/o Tx 9mos-2yrs |
