Aeromonads are inhabitants of aquatic ecosystems and are described as being involved in intestinal disturbances and other infections. A total of 200 drinking water samples from domestic and public reservoirs and drinking fountains located in São Paulo (Brazil), were analyzed for the presence of Aeromonas. Samples were concentrated by membrane filtration and enriched in APW. ADA medium was used for Aeromonas isolation and colonies were confirmed by biochemical characterization. Strains isolated were tested for hemolysin and toxin production. Aeromonas was detected in 12 samples (6.0%). Aeromonas strains (96) were isolated and identified as: A. caviae (41.7%), A.hydrophila (15.7%), A.allosacharophila (10.4%), A. schubertii (1.0%) and Aeromonas spp. (31.2%).The results revealed that 70% of A. caviae, 66.7% of A. hydrophila, 80% of A. allosacharophila and 46.6% of Aeromonas spp. were hemolytic. The assay for checking production of toxins showed that 17.5% of A. caviae, 73.3% of A. hydrophila, 60% of A. allosacharophila, 100% of A. schubertii, and 33.3% of Aeromonas spp. were able to produce toxins. The results demonstrated the pathogenic potential of Aeromonas, indicating that the presence of this emerging pathogen in water systems is a public health concern.
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Research Article|
November 01 2007
Aeromonas detection and their toxins from drinking water from reservoirs and drinking fountains
Maria Tereza Pepe Razzolini;
1School of Public Health, University of São Paulo, São Paulo, Brazil Av. Dr Arnaldo 715 1° andar, - 01246-904, São Paulo - SP, Brazil
Tel.: 55 11 3061 7712 Fax: 55 11 3061 7732; E-mail: [email protected]
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Marisa Di Bari;
Marisa Di Bari
2CETESB - Companhia de Tecnologia de Saneamento Ambiental, Av. Prof. Frederico Hermann Jr 346 - Prédio 5, São Paulo - SP, 05459-900, Brazil
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Petra Sanchez Sanchez;
Petra Sanchez Sanchez
3Universidade Presbiteriana Mackenzie, Rua da Consolação 896 – Edifício João Calvino, 7° andar, 01302-907, São Paulo - SP, Brazil
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Maria Inês Zanoli Sato
Maria Inês Zanoli Sato
2CETESB - Companhia de Tecnologia de Saneamento Ambiental, Av. Prof. Frederico Hermann Jr 346 - Prédio 5, São Paulo - SP, 05459-900, Brazil
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J Water Health (2008) 6 (1): 117–123.
Article history
Received:
December 15 2006
Accepted:
February 11 2007
Citation
Maria Tereza Pepe Razzolini, Marisa Di Bari, Petra Sanchez Sanchez, Maria Inês Zanoli Sato; Aeromonas detection and their toxins from drinking water from reservoirs and drinking fountains. J Water Health 1 March 2008; 6 (1): 117–123. doi: https://doi.org/10.2166/wh.2007.018
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