Immunosuppressive effect of Cryptosporidium baileyi infection on vaccination against avian infectious bronchitis in chicks |
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| Authors: | Jae Ku Rhee Hong Ji Yang Sim Yong Yook Hyeon Cheol Kim |
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| Affiliation: | Department of Parasitology, Veterinary School, Chonbuk National University, Chonju, Korea. |
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| Abstract: | Two-day-old commercial chicks were inoculated orally with 2 × 106 oocysts of Cryptosporidium baileyi and vaccinated with 103.5 EID50/head of a commercially available avian infectious bronchitis (IB) live virus vaccine at 4 and 14 days following inoculation. Chicks infected with C. baileyi were shown to have an immunosuppressive effect on IB virus. It is concluded that infection with the protozoon in early life may increase their susceptibility to IB. |
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| Keywords: | Cryptosporidium baileyi avian infectious bronchitis immunosuppressive effect hemagglutination-inhibition test vaccination |
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