Pseudotuberculosis in the Antwerp Zoo.

During the last five years (1970-1974) 42 cases of pseudotuberculosis were diagnosed among the Antwerp Zoo animals. The prevalence of disease, and the distribution frequency of gross lesions in the visceral organs were studied. The susceptibility of different animals and the influence of some factors to the disease are discussed. It demonstrates that Y. pseudotuberculosis, and particularly its two serotypes I and II, constitutes the principal causative agent. Pseudotuberculosis is found to be highly prevalent in cold season.