Difference between revisions of "Campylobacter Flashcards"
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Revision as of 14:23, 12 June 2011
Question | Answer | Article | |
What type of bacteria are campylobacter? | Curved, gram negative rods with polar flagellum to aid motility. |
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Which of the campylobacter species are thermophillic (thrive at higher temperature)? |
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Which of the campylobacter species are non-thermophillic? | C.fetus |
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How does C.fetus persist within the host genital tract? | C. fetus subspecies fetus and subspecies venerealis possess a microcapsule (S layer) which resists phagocytosis and serum-mediated destruction and enhances survival in the genital tract. Antigens of the S layer undergo antigenic shifts in C. fetus subspecies venerealis, allowing persistence in the host. |
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Which campylobacter species is responsible for 10% of ovine abortions? | C.fetus. After ingestion during the last trimester of pregnancy it causes necrotic placentitis, which prediposes the animal to late abortion, still birth or weak lambs. It can also cause sporadic abortion in cattle and horses but at a lower incidence than in sheep. |
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How can C.fetus be diagnosed? | On post mortem aborted lambs may have round necrotic lesions on the surface of their liver. |
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How can C.fetus subspecies fetus controlled and treated? | Aborting ewes should be isolated and other ewes should be moved to clean pasture. The placenta should be destroyed and the flock vaccinated with bacterin during the outbreak and prophylactically. During and outbreak, chlortetracycline should be added to the feed. |
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Which Campylobacter species causes venereal infection in cattle and infertility in female cattle? | Campylobacter fetus subspecies venerealis. It causes:
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What are the clinical signs in Bulls infected with C.fetus subsp. venerealis? | Bulls are known as carriers as they show no clinical signs of the disease but they carry bacteria in the glandular crypts of the prepuce. |
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Do cows develop immunity to C.fetus subsp. venerealis? | The cow may remain infertile for 3-5 months before immunity develops, which then lasts 4-5 years. Effective immunity includes induction of IgA in the vagina and IgG in the uterus. The bacteria may persist in the vagina and be transmitted to bulls. |
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How do you diagnose C.fetus subsp. venerealis? |
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How can C.fetus subsp. venerealisbe treated? |
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