Antimicrobial resistance of clinical and environmental strains of Vibrio cholerae isolated in lima-peru during epidemics of 1991 and 1998

被引:11
作者
Ibarra, J. O. [2 ]
Alvarado, D. E. [1 ]
机构
[1] Natl Univ San Marcos, Coll Biol Sci, Lima, Peru
[2] Fed Villarreal Natl Univ, Natl Sci & Math Coll, Lima, Peru
关键词
Vibrio cholerae; antimicrobial resistance; cholera outbreak;
D O I
10.1590/S1413-86702007000100022
中图分类号
R51 [传染病];
学科分类号
100401 ;
摘要
The susceptibility in vitro of 71 isolations of V cholerae was evaluated: 24 of clinical origin and 47 strains of clinical and environmental origin collected in the epidemic of 1991 and during the outbreak epidemic of 1998 in Lima-Peru respectively. The biochemical and serological tests carried out established that 43 (60,6%) corresponded to the serogroup 01 Ogawa of the 1998 epidemic; 26 (36.6%) were of the serotype Inaba, being 24 of them isolated in 1991. Two strains did not belong to the serogroup O1. By means of disk diffusion method and Minimal Inhibitory Concentration (MIC), 15 strains with multi-resistance to antibiotics were determined, 10 of which were of clinical origin and 5 of natural origin, showing 9 antibiotypes with different resistance pattern. The evaluation of susceptibility in front of the vibriostatic agent 0/129, demonstrated that 11.4 % of the strains, collected in 1998, presented resistance to a concentration of 150 jig. A direct relationship among the resistance that presented the strains of clinical and environmental origin isolated in 1991 and 1998 was established as much for tetracycline, sulfa/trimethoprim and 0/129; 88.6% of the clinical strains of the year 1998 presented resistance to these three drugs, while 100% of clinical strains isolated in 1991 were sensitive to 0/129 (150 mu g), sulfa/trimethoprim. and tetracycline. We conclude that V cholerae 01 has increased its resistance to antimicrobial drugs of clinical use in the same way it is also losing susceptibility to the vibriostatic compound 0/129 for what their use is not recommended for taxonomic purposes.
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页码:100 / 105
页数:6
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