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  • Title: Comparison of immunity induced with a Mycoplasma gallisepticum bacterin between high- and low-responder lines of chickens.
    Author: Yagihashi T, Nunoya T, Sannai S, Tajima M.
    Journal: Avian Dis; 1992; 36(1):125-33. PubMed ID: 1567299.
    Abstract:
    Chickens of the high-responder line GSP and low-responder line BM-C, which had been known to have different antibody responses to Mycoplasma gallisepticum (MG) antigen, were immunized by intramuscular injection and by subsequent intratracheal instillation of MG bacterin. They were then challenged with the pathogenic strain SAS of MG. The preventive effects of local antibodies detectable in the trachea, saliva, and lacrima were compared between the two lines of chickens. The local antibody responses, as determined by an enzyme-linked immunosorbent assay, were higher in line GSP than in line BM-C before and after challenge. Following challenge, chickens of both lines were protected from colonization by MG and the development of respiratory lesions. The degree of protection in line GSP was higher than that of line BM-C. The results suggest that local antibodies may play an important role in the host defense mechanism to respiratory MG infection.
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