Caracterización de una cepa de vibrio cholerae 01 multirresistente, aislada de un caso de cólera en Chile / Characterization of a multiresistant vibrio cholerae 01 strain, isolated from a cholera case in Chile

This report characterizes a multiresistant Vibrio Cholerae 01 strain, isolated from a patient with cholera and investigates the mechanism of resistance. The analyzed strain was resistant to tetracycline, chloramphenicol and trimethoprim-sulfamethoxazole. The resistance was mediated by a 101 megadalton plasmid that was transferred to the resultant of a conjugation assay between the multiresistant V. Cholerae strain and E. coli C-600 used as receptor strain, that acquired the triple resistance of the parental strain. The resistant V. Cholerae strain had a Ogawa serotype, El Tor biotype and toxigenic capacity, demonstrated by ELISA and latex agglutination techniques. The biochemical features of the strain were identical to those of susceptible strains, except for the resistance to 10 and 150 ug o 129 vibriostatic factor. The emergence of plasmid mediated resistance to drugs of choice in the treatment of cholera must alert Chilean and Latin American health authorities, considering the cholera will continue affecting the region

Caracterización de Neisseria meningitidis aislada de infecciones sistémicas: Chile, 1992-1993 / Characterization of neisseria meningitidis isolated of systemic infections: Chile, 1992-1993

Background: in Chile, all systemic infections caused by Neisseria meningitidis must be reported and the bacterial strain must be sent to a reference laboratory at the Instituto de Salud Pública de Chile (ISP). Aim: to report the characterization of strains of Neisseria meningitidis isolated during systemic infections in Chile during the years 1992 and 1993. Methods: the serogroup, serotype, subtype and antimicrobial susceptibility of every starin of Neisseria meningitidis received at the ISP during 1992 and 1993 was studied. Resuts: 628 strains of Neisseria meningitidis were confirmed during 1992 and 1993. B serogroup was responsible of 91.1 per cent and 94.4 per cent of confirmed cases during 1992 and 1993 respectively. Serotypes and subtypes most frequently associated to B serogroup were B. 15: P1.3 (63.2 per cent in 1992 and 51.8 per cent in 1993) and B:NT:P1.3 (11.7 per cent in 1992 and 21.3 per cent in 1993). In 1992, all strains were susceptible to penicillin, chloramphenicol, cetriaxone and rifampicin. During 1993, 7 (2 per cent) strains were found, for the first time in Chile, moderately susceptible to penicillin and rifampicin MIC increased fourfold in respect of 1992, although all strains continued to be susceptible to this will demand the use of molecular biology techniques for their identification