IDENTIFICATION AND SUSCEPTIBILITY OF CLINICALLY ISOLATED BACTERIA. STATISTICAL DATA AT SHOWA UNIVERSITY HOSPITAL FROM JULY 1990 TO JUNE 1991

• Published in: Journal of The Showa Medical Association Vol. 52; no. 1; pp. 93 - 103
• Main Authors: FUKUCHI, Kunihiko, TAKAGI, Yasushi, GOMI, Kunihide, YAMAGUCHI, Tomoko, WAKUTA, Rika, TANAKA, Youko
• Format: Journal Article
• Language: Japanese
• Published: The Showa University Society 1992
• Subjects: MIC : minimal inhibitory concentration; MRSA; MSSA; Pseudomonas aeruginosa; staphylococcus aureus
• ISSN: 0037-4342; 2185-0976
• DOI: 10.14930/jsma1939.52.93

The infection of compromised hosts by resident bacteria has become a serious problem, because the infection is very severe and nosocomial infection occurs. We introduced an automated system, AUTOSCAN-4 (Baxter, CA), for identification and susceptibility tests for clinically isolated bacteria in July 1990. Detailed and accurate results of identification and susceptibility can be produced by the system. We have accumulated statistics of the identification and susceptibility of clinically isolated bacteria at Showa University Hospital, during the year from July 1990 to June 1991. Pathogenic bacteria were isolated and 1/3 to 1/2 of the specimens (about 3, 500 specimens per month) were identified. Staphylococcus aureus was isolated from 300-500 specimens and had the highest frequency of occurrence. Next was Pseudomonas aeruginosa obtained from 200-400 specimens. According to the susceptibility test, about 70% of S. aureus isolftes were identified as Methicillin Resistant Staphylococcus pureus (MRSA), and 15% of P. aeruginosa isolates were extremely drug-resistant against various antimicrobial agents. MRSA was isolated from 100-150 patients out of a total of 1, 000 inpatients in the hospital per month. Twenty to forty percent of the patients infected with MRSA were also infected with P. aeruginosa. This indicates the difficulty of antimicrobial treatment of these multi infected patients.