[Yersinia pseudotuberculosis in New World monkeys].

It is reported on four cases of pseudotuberculosis in 2 Saimiri sciureus, 1 Callithrix jacchus/penicillata hybrid and 1 S. oedipus. The animals came from two different groups, one being infected with Y. pseudotuberculosis serotype I, the other with Y. pseudotuberculosis serotype II. All cases showed intestinal infection of thermophile Campylobacter. Remarkable were severe haemorrhagic components and the distinct RHS-proliferation, especially in the mesenteric lymphatic nodes.