The important and common oxyurids which affect laboratory rodents- Syphacia spp., Aspiculuris tetraptera and Passalurus ambiguus-are discussed and reviewed. Their life histories, pathogenicity and immunity are examined, and mention is made of the influence of age, sex, strain and host status on infection. The importance of using worm-free animals in experimental work is stressed, and guidance is given on diagnosis and control.
A spontaneous outbreak of yersiniosis caused by Yersinia pseudotuberculosis serotype IIB occurred in a small indoor breeding colony of red-bellied tamarins ( Saguinus labiatus) during the winter of 1981. Of 3S monkeys at risk 6 died of an acute or subacute infection over a period of 23 days. Clinical signs were anorexia, weakness, listlessness and depression. The disease was characterized by focal necrosis of the liver, spleen, mesenteric lymph nodes, ulcerative enteritis, and the presence of colonies of Gram-negative bacilli in the lesions. Y. pseudotuberculosis was isolated from the liver, spleen, mesenteric lymph nodes and kidney but not from the blood, lung or intestine. Contaminated food was believed to be the source of infection.
Captive Callitrichids frequently suffer a fatal wasting disease, wasting marmoset syndrome (WMS), of unexplained cause. This paper describes studies on the erythrocytes from animals in a breeding colony of tamarins (Saguinus labiatus), in which deaths from anaemia and wasting were occurring, to seek evidence for biochemical changes which could lead to oxidative damage and premature cell lysis. In only one animal of 33 studied did the red blood cell lipids show an increased susceptibility to oxidative damage. This animal, with some degree of certainty, could be diagnosed as having WMS. It was concluded that evidence for a primary deficiency of antioxidants as a cause of unexplained deaths, or WMS, in the colony could not at present be substantiated.
The histopathology of the livers and lungs of pigs after a primary infection with eggs of A. suum was compared with the lesions and cellular response found in resistant pigs after reinfection.The author's previously published work on experimental infection of guinea pigs, rabbits and pigs is also discussed and summarized.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.