pH Stability of St. Louis Encephalitis Virus.

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Abstract
From the data presented here it would appear that the hydrogen ion concentration at which St. Louis encephalitis virus is most stable is similar to that reported for the virus of Japanese B encephalitis. The former was found, by titration in mice, to be most stable at a pH value near 8.8. The virus of St. Louis encephalitis could still be detected after 3 weeks at pH 8.4 and pH 8.8 but not at higher or lower pH values.