LONGITUDINAL-STUDY OF SUSCEPTIBILITIES OF SPECIES OF THE BACTEROIDES-FRAGILIS GROUP TO 5 ANTIMICROBIAL AGENTS IN 3 MEDICAL-CENTERS

被引:25
作者
TURGEON, P
TURGEON, V
GOURDEAU, M
DUBOIS, J
LAMOTHE, F
机构
[1] HOP ENFANTS JESUS, QUEBEC CITY G1J 1Z4, PQ, CANADA
[2] HOP HOTEL DIEU, SHERBROOKE J1G 2E8, PQ, CANADA
关键词
D O I
10.1128/AAC.38.10.2276
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
A total of 579 clinical isolates of the Bacteroides fragilis group collected from three Canadian hospitals were tested for susceptibility to five antimicrobial agents by using an agar dilution method. During the 4-year survey, isolates from intra-abdominal infections were collected from the following sites: abdominal abscesses (48%), peritoneal fluid (39%), blood (10%), and bile (3%). B. fragilis was the most prevalent species (35.4%), followed by B. thetaiotaomicron (19.2%), B. ovatus (15.9%), and B. vulgatus (11%). No metronidazole- or imipenem-resistant strains were found during the survey. Resistance profiles varied among the different species tested: 7.8, 2.9, and 7.3% of B. fragilis strains (n = 205) and 68.1, 17.2, and 9.4% of non-B. fragilis strains (n = 373) were resistant to cefotetan, cefoxitin, and clindamycin, respectively. B. fragilis and B. vulgatus demonstrated lower resistance rates than B. thetaiotaomicron, B. ovatus, B. distasonis, and B. caccae. During the study, rates of resistance to cefotetan and clindamycin fluctuated but rates of resistance to cefoxitin increased, particularly at one center. These data indicate a need to determine the susceptibility patterns of the B. fragilis group periodically at each hospital.
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页码:2276 / 2279
页数:4
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