RESUMEN
The study of 491 V. cholerae strains isolated from humans in the endemic foci and the areas of the spread infection during the period of 1969-1979 revealed no essential differences in the properties of the vibrios. The majority of the strains proved to be typical in their main biological properties and belonged to biotype E1 Tor, seroval Ogawa. Among E1 Tor strains a comparatively small number of cultures with changed properties were detected. In some states of India classical cholera vibrios and E1 Tor vibrios were found to circulate simultaneously.
Asunto(s)
Brotes de Enfermedades , Vibrio cholerae/aislamiento & purificación , Asia , Cólera/microbiología , Humanos , Serotipificación , Vibrio cholerae/clasificaciónRESUMEN
Dutta and Habbu's method was applied to comparative study of cholerogenic properties of the L-strains of cholera vibrios and their initial bacterial variants. In difference from the initial strains, L-forms of cholera vibrios possessed no cholerogenic properties. A possibility of reversion of the stable L-form of cholera vibrios into bacterial form in vivo was revealed. This reversion was accompanied by the restoration of the cholerogenic properties and the change of the biotype of the cholera vibrio.
Asunto(s)
Enterotoxinas/biosíntesis , Formas L/metabolismo , Vibrio cholerae/metabolismo , Animales , Animales Recién Nacidos , Formas L/patogenicidad , Conejos , Vibrio cholerae/patogenicidadRESUMEN
Higher stability of resistance to tetracycline in the polyresistant strain of V. eltor under conditions of macroorganism as compared to nutrient media was found experimentally. To increase isolation of the resistant forms of the cholera vibrio it was recommended to use agar with tetracycline or other antibiotics depending on the particular case in addition to the routine media.