Microorganisms of thePleuropneumonia group (family ofMycoplasmataceae) in man

Summary Sixty one strains of pleuropneumonia-like organisms (P.P.L.O.) have been isolated in man: 25 from the discharge of patients with urogenital disorders, 13 from women who were pregnant or who had borne a child 6 weeks previously. In women the frequency of positive cultures increased with the disappearance of Lactobacilli. Twenty three strains were cultivated from the buccal mucosa of 27 healthy subjects. Classification by means of cultural appearance and biochemical behaviour allowed of differentiation into 4 groups, three of which were in conformity with three species ofMycoplasma described byEdward andFreundt. The only difference as compared with this latter classification is that with our methodM. fermentans andM. salivarius regularl gave clearcut hemolysis, which was not found byEdward. Two urogenital strains which grew well on not specially enriched media could not be identified.