Jan 1, 1983

Coxsackievirus B4: in vitro genetic markers and virulence

Archives of Virology
S Jimes, R M Jamison

Abstract

The relationship of virulence to mice of the coxsackievirus B4 prototype JBV strain and selected mutants to several in vitro genetic markers has been examined. Markers studied include the t, d, DS, DEAE-D, and guanidine resistance (G), markers and a plaque size marker, here designated PS. The JVB strain was found to have the characteristics t-, d-, DS+, DEAE-D+, G-, PS+ and to be virulent when inoculated by the intraperitoneal route into suckling CD-1 mice (log titer/LD50 = 6.4/6.0). One naturally occurring mutant strain (characteristic = t-, d+, DS+, G-, PS+ was selected by terminal end point dilution and found to be virulent (log titer/LD50 = 7.0/6.0). Passage of the JVB population in the presence of guanidine hydrochloride (75 micrograms/ml) allowed selection of avirulent, guanidine resistant mutants with characteristics of t-, d-, DS+, DEAE-D+, G+. These mutants produced only small plaques (1.0-1.6 mm) and were designated PS-. The prototype and other selected strains that contained both large plaque and small plaque variants were characterized as PS+ and were invariably virulent. Although a variance in the d character has been demonstrated in some of the above strains, we conclude that virulence and the in vitro genetic mar...Continue Reading

Mentioned in this Paper

Pathogenicity
Bacteriophage Plaque Assay
Genetic Markers
Dental Plaque
Human poliovirus 3
Senile Plaques
Animals, Suckling
Guanidine Hydrochloride
Virulence
Mutant

About this Paper

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