id author title date pages extension mime words sentences flesch summary cache txt cord-022383-pz0htccp Kohn, Dennis F. Biology and Diseases of Rats 2013-11-17 .txt text/plain 20181 1195 50 The severity and prevalence of clinical disease within an infected colony are associated with environmental conditions that induce stress (e.g., experimental manipulation, overcrowding, fluctuations in ambient temperature and humid ity, and copathogens). Salmonellosis, which was once a major cause of disease in laboratory rat and mouse colonies, is rarely reported in either species today. Mycoplasma pulmonis recently has become recognized as an important pathogen in the female genital tract of rats, and thus is being treated here as a distinct disease rather than as a sequella to MRM. Sendai virus commonly infects laboratory rats, but its clinical significance is less than in mice. Infection is usually diagnosed retrospectively in rats, where pulmonary lesions are observed following seroconversion to PVM in the absence of other respiratory pathogens. This disease, which occurs more fre quently in females, has been reported in numerous strains of rats. ./cache/cord-022383-pz0htccp.txt ./txt/cord-022383-pz0htccp.txt