Characterization of aeromonas species isolated from an estuarine environment

Thirty water samples were collected, at two week intervals, from the estuary of the River Cocó. The aim was to characterize the presence, distribution and types of Aeromonas spp, in the estuary of the River Cocó, Ceara, Brazil (03º46'28.83''S e 38º26'36.52''S). Aeromonas were identified in 19 (63 percent) samples analyzed by plating and CFU counts. Presence/absence tests were positive for 11 (37 percent) of the samples resulting in the detection of Aeromonas in a total of 23 (77 percent) of samples. CFU counts varied from < 10 to 1.4 x 10(4) CFU mL-1 . From the isolated strains seven species of Aeromonas were identified: A. caviae (29/69), A. veronii bv. sobria (13/69), A. veronii bv. veronii (8/69), A. trota (6/69), A. media (5/69), A. sobria (4/69) and A. hydrophila and Aeromonas sp. (2/69). Of the 38 strains tested, 23 (60 percent) showed resistance to at least one of the eight antimicrobials. Multiple resistance to antibiotics was observed in A. caviae, A. media, A. sóbria and A. veronii bv. sobria. Aeromonas caviae showed the highest multiple resistance, being resistant to four antibiotics. The presence of those microorganisms may contribute to the occurrence of gastroenteritis, mainly in children, since they are considered opportunists.

Characterization of Aeromonas species isolated from an estuarine environment.

Thirty water samples were collected, at two week intervals, from the estuary of the River Cocó. The aim was to characterize the presence, distribution and types of Aeromonas spp, in the estuary of the River Cocó, Ceara, Brazil (03°46'28.83''S e 38°26'36.52''S). Aeromonas were identified in 19 (63%) samples analyzed by plating and CFU counts. Presence/absence tests were positive for 11 (37%) of the samples resulting in the detection of Aeromonas in a total of 23 (77%) of samples. CFU counts varied from < 10 to 1.4 x 10(4) CFU mL(-1). From the isolated strains seven species of Aeromonas were identified: A. caviae (29/69), A. veronii bv. sobria (13/69), A. veronii bv. veronii (8/69), A. trota (6/69), A. media (5/69), A. sobria (4/69) and A. hydrophila and Aeromonas sp. (2/69). Of the 38 strains tested, 23 (60%) showed resistance to at least one of the eight antimicrobials. Multiple resistance to antibiotics was observed in A. caviae, A. media , A. sóbria and A. veronii bv. sobria. Aeromonas caviae showed the highest multiple resistance, being resistant to four antibiotics. The presence of those microorganisms may contribute to the occurrence of gastroenteritis, mainly in children, since they are considered opportunists.

Qualidade da água de poços destinada ao consumo humano, na cidade de Fortaleza, CE / Water quality of wells destined to the human consumption, in the city of Fortaleza, CE

A contaminação das águas de abastecimento contribui para o aumento das doenças transmitidas ao homem. Este trabalho objetivou estudar a qualidade bacteriológica e química da água de poços de três zonas diferentes de Fortaleza: Norte (A); Sul (B) e Oeste (C). A pesquisa foi realizada entre abril e julho de 2002, sendo coletadas 20 amostras de cada zona, totalizando 60. foram determinadas nas amostras pH, salinidade e NMP/100 mL de coliformes totais e fecais. Todas as zonas apresentaram água imprópria para o homem (Portaria MS n0 1469/2000), sendo a B a de maior contaminação fecal (90 por cento) com NMPs de CF/100mL variando de 3,6 a > 23,0, seguida da zona C (50 por cento) e A (10 por cento). Nas zonas A, B e C o pH variou de 6,0 a 7,6; 6,48 a 7,2 e 6,0 a 7,15 e a salinidade de 0 a 1 por cento; 0 a 2 por cento e zero, respectivamente. A zona B apresentou E. coli em 90 por cento das amostras, a C 60 por cento e A 10 por cento. A falta de saneamento e a detecção de CF em águas utilizadas para consumo servem de alerta para a contaminação dos lençóis freáticos da cidade.