Abstract
Summary: A modification of the growth-inhibition test for identifyingMycoplasmaspecies is described. The modification simplifies the screening of a large number of strains for one species. Experiments showed that it was effective and specific when used to identifyM. mycoidesvar.mycoides. Its use in studying the epidemiology of contagious bovine pleuropneumonia is discussed.This work was financed in part by the United States of America Agency for International Development under the terms of the CCTA/AID Joint Project 16 for research on contagious bovine pleuropneumonia.We wish to thank Dr R. H. Leach for the various bovine mycoplasma cultures.