Abstract
VARIOUS bacteria are known, to produce opalescence in egg-yolk emulsions due to lecithinase or lipase activity. Among these are the lecithinase-producing clostridia and aerobic spore-forming bacilli, and the lipolytic clostridia and staphylococci. Little attention seems to have been paid to the effects produced by Gram-negative organisms growing on egg-yolk media. Felsenfeld1 showed that the opalescence produced by four strains of Vibrio comma and one strain of Vibrio el tor was due to lecithinase activity, and Crook2 made a passing reference to one strain of Pseudomonas pyocyanea (Ps. aeruginosa) which produced an opalescence on egg-yolk agar. Willis3 noted tho opalescence changes produced by four strains of Ps. pyocyanea.
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References
Felsenfeld, O., J. Bact., 48, 155 (1944).
Crook, E. M., Brit. J. Exp. Path., 23, 37 (1942).
Willis, A. T., J. Path. Bact. (in the press).
Willis, A. T., Nature, 185, 943 (1960).
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WILLIS, A., GOWLAND, G. Egg-Yolk Reactions of Pseudomonas Species. Nature 187, 432–433 (1960). https://doi.org/10.1038/187432b0
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DOI: https://doi.org/10.1038/187432b0
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