Conditions affecting the growth of Bacterium coli on bile salts media; enumeration of this organism in polluted waters.

摘要: SUMMARY: The growth of Bacterium coli on agar media containing bile salts is conditioned by a number factors. proportion total cells able to grow medium not rapidly declines at temperatures incubation above 43°. On and lactose distinctly inhibitory effect observed 37°; with most strains this still more pronounced 44°. Some brands are appreciably than others. Inclusion phosphate in introduces markedly factor, the severity which varies strain organism; some virtually unable such medium. When culture Bact. suspended water only small concentrations inorganic an increasing population becomes attenuated so that An occasional may also exhibit sensitiveness presence neutral red. This attenuating be largely decreased if, before inoculum mixed agar, it subjected short period broth. treatment has been made basis technique for obtaining colony count applicable polluted waters.