[Interactions of certain sapronotic infection pathogens in mixed cultures on a solid medium at different temperatures].
Under experimental conditions within the time limit of 21-35 days the causative agents of sapronotic infections in binary cultures, grown on a solid medium at 37 degrees C, 25-27 degrees C and 6-8 degrees C, interacted with one another transbiotically and through contact, their interactions having the character of amensalism, commensalisms-amensalism, competitive equilibrium, antibiosis. Irrespective of the initial density, a change in the species composition was observed, one of them playing the dominating role. At 37 degrees C mutual antagonism of Yersinia pseudotuberculosis and Pseudomonas aeruginosa killed both cultures. P. aeruginosa cells were also killed when cultivated at 37 degrees C jointly with Listeria monocytogenes, the most resistant species under experimental conditions. While studying the character of microorganisms interactions the method of contacting cultures on a solid medium was shown to give more information in comparison with the "cross-strip" method. Possible interspecific relationships between the causative agents of sapronotic infections under natural conditions are discussed.
Kuznetsov
V G
VG
Research Institute of Epidemiology and Microbiology, Siberian Branch, Russian Acad. Med. Sci., Vladivostok, Russia.
Timchenko
N F
NF
D000898:Antibiosis; D003470:Culture Media; D008089:Listeria monocytogenes / Q000254:growth & development / Q000502:physiology*; D011550:Pseudomonas aeruginosa / Q000254:growth & development / Q000502:physiology*; D013696:Temperature; D015011:Yersinia pseudotuberculosis / Q000254:growth & development / Q000502:physiology*
D003470:Culture Media