[Pyocin typing of Pseudomonas aeruginosa strains]. / Piotsinotipirovanie shtammov Pseudomonas aeruginosa.

The possibility of using the typing of P. aeruginosa strains by their pyocins as one of the epidemiological markers in the study of P. aeruginosa hospital infections has been established. As this method of typing is characterized by certain variability, the authors propose that the method of the "cross analysis" of pyocins produced by P. aeruginosa strains be used simultaneously. This method is based on the following phenomenon: if the cultures to be compared are different, the pyocin produced by one strain suppresses the growth of the other one, and if the cultures are identical, no suppression of their growth by pyocins is observed.

[Experience with epidemiologic studies of pyocyaneus infections. I. Feasibility of using serotypes and antibiotic resistance as a epidemiologic label for clinical strains]. / Opyt épidemiologicheskogo izucheniia sinegnoinoi infektsii. Soobshchenie I. Vozmozhnost' ispol'zovaniia serotipov i antibiotikorezistentnosti v kachestve épidemiologicheskoi metki klinicheskikh shtammov.

The authors carried out serological typing of 98 Pseudomonas aeruginosa strains, isolated from patients of burn department of the Sklifosovsky First Aid Institute in January-July, 1974, and of 215 strains obtained from other sources; their sensitivity to 13 antibiotics was determined. Pseudomonas aeruginosa cultures isolated from the patients were typed with O-sera of 10 serological types. The presence of several hospital strains of Pseudomonas aeruginosa was found by means of serological typing; along with these there were revealed cultures of this causative agent sporadically appearing in the department. Sensitivity to some antibiotics could serve as an additional criterion for differentiation of Pseudomonas aeruginosa strains of the same serological type.