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  • Title: Further studies on the immunization of chickens with temperature-sensitive Mycoplasma gallisepticum mutant.
    Author: Lam KM, Lin WQ.
    Journal: Avian Dis; 1984; 28(1):131-8. PubMed ID: 6326734.
    Abstract:
    Newly hatched chickens were immunized with a temperature-sensitive (TS) Mycoplasma gallisepticum (MG) mutant (TS 100). Immunized chickens resisted challenge with the virulent S6 strain. The dose of TS MG needed for protection was less than 3.3 X 10(4) colony-forming units. After immunization with TS 100, chickens were subjected to a variety of virus infection and immunosuppressive treatments. Neonatal bursectomy or thymectomy, infectious bursal disease virus infection, and infectious bronchitis virus vaccination or a combination of infectious bronchitis virus and Newcastle disease virus vaccination did not contribute to the development of air-sac lesions in TS MG-immunized chickens. Infectious bronchitis virus vaccination enabled MG to migrate from the nasal cavity to the trachea but not to the air sacs. The TS MG vaccine appears to be a safe immunogen.
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