Epidemiological study of Pseudomonas aeruginosa isolated from clinical specimens.

The epidemiology of Pseudomonas aeruginosa infection was studied in Siriraj Hospital. During April 1989-June 1990, P. aeruginosa 436 strains were isolated from clinical specimens of 260 patients, ie blood (19 strains), pus (192 strains), sputum (159 strains) and urine (66 strains). By using a combination of serogroups and pyocin types as epidemiological markers, it was found that there were 10 serogroups and 8 pyocin types which can be differentiated into 33 serogroup/pyocin types or patterns. The most common pattern was E 211111 (26.3%) followed by B 121614 (24.5%), G 373112 (13%) and L 888888 (7.1%), respectively.