STUDIES ON THE MILKY DISEASE ORGANISMS

Abstract
B. popilliae was grown parasitically to develop a foundation for later study of its growth on artificial media. Most strains derived directly from diseased larvae are capable of parasitizing healthy larvae, producing a typical milky disease. Even when the bacteria become exceedingly numerous in the larval blood, they do not cause an appreciable change in pH. Both vegetative cell multiplication and sporulation occur in a range of Eh from +240 to +450 mv. Morphological variations among spores of B. popilliae within a strain or among related milky disease species were noted.
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