Article
Occurrence and composition of class 1 and class 2 integrons in clinical and environmental O1 and non-O1/non-O139 Vibrio cholerae strains from the Brazilian Amazon
Registro en:
SÁ, Lena Lilian Canto de; et al. Occurrence and composition of class 1 and class 2 integrons in clinical and environmental O1 and non-O1/non-O139 Vibrio cholerae strains from the Brazilian Amazon. Mem Inst Oswaldo Cruz, v.105, n.2, p.229-232, Mar. 2010.
0074-0276
1678-8060
Autor
Sá, Lena Lillian Canto de
Fonseca, Érica Lourenço da
Pellegrini, Maíra
Freitas, Fernanda
Loureiro, Edvaldo Carlos Brito
Vicente, Ana Carolina Paulo
Resumen
This study identified and characterised class 1 and 2 integrons in clinical and environmental Vibrio cholerae O1 and non-O1/non-O139 strains isolated from the Brazilian Amazon. The aadA2 and aadA7 gene cassettes were found in class 1 integrons in two genotypes of environmental V. cholerae non-O1/non-O139. Empty integrons were found in strains from the Brazilian cholera epidemic. A class 2 integron was detected in one strain from the V. cholerae Amazonia lineage harbouring sat1 and aadA1 genes. All isolates were resistant to aminoglycosides, indicating aadA functionality. These findings suggest that environmental bacteria act as cassette reservoirs that favour the emergence of resistant pathogens.