Increased virulence of a human enterovirus (coxsackievirus B3) in selenium-deficient mice - PubMed (original) (raw)
Increased virulence of a human enterovirus (coxsackievirus B3) in selenium-deficient mice
M A Beck et al. J Infect Dis. 1994 Aug.
Abstract
Coxsackievirus B3 (CVB3/20)-induced myocarditic lesions occurred more quickly and were more severe and virus titers in heart and liver were higher in selenium (Se)-deficient than Se-adequate mice. NK cell activity and serum neutralizing antibody titers were similar in both Se-adequate and -deficient CVB3/20-infected mice; however, lymphocyte proliferation to both mitogen and antigen was decreased in Se-deficient mice. CVB3/20 isolated from Se-deficient donor mice and inoculated into Se-adequate recipient mice induced severe myocarditis. In contrast, CVB3/20 isolated from Se-adequate donor mice and inoculated into Se-adequate recipient mice induced only moderate myocarditis, similar to that caused by the original virus stock. Thus, the general population of CVB3/20 virions, as a consequence of replicating in an Se-deficient host, underwent a phenotypic change to increased virulence. These results have important implications for the emergence of virulent viruses.
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