Observations on experimental inactivated vaccines for contagious bovine pleuropneumonia

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Abstract

In two trials the efficacy of inactivated vaccines against contagious bovine pleuropneumonia was tested by exposing vaccinated cattle to droplet infection provided by close contact with experimentally infected ‘donors’. Complete protection was given by an extreme form of vaccination in which a heavy suspension of killed Mycoplasma mycoides subsp. mycoides emulsified with Freund’s complete adjuvant was given in two large doses. ‘Mouse-protective antibody’ (MPA) was also produced, i.e. serum transferred to mice 2–4 h before intraperitoneal challenge prevented the development of mycoplasmaemia. However, the study did not answer the question ‘Is MPA protective for cattle?’. No protection was given by a milder form of vaccination in which a lighter suspension of killed Hiycoplasmas emulsified with Freund’s incomplete adjuvant was given in a comparatively small dose on a single occasion. © 1986, Cambridge University Press. All rights reserved.

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APA

Gray, M. A., Simam, P., & Smith, G. R. (1986). Observations on experimental inactivated vaccines for contagious bovine pleuropneumonia. Journal of Hygiene, 97(2), 305–315. https://doi.org/10.1017/S0022172400065402

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