PERSISTENCE OF TOTAL AND FECAL COLIFORMS AND Pseudomonas aeruginosa IN IN NATURA WATER SAMPLES FROM RIVERS THAT SUPPLY A WATER TREATMENT STATION IN CURITIBA, BRAZIL

Autores/as

  • Mônica Paul Freitas
  • Marita Maciel Moreira laskowski
  • Carlos Roberto Dalke
  • Patricia do Rocio Dalzoto
  • Ida Chapaval Pimentel

DOI:

https://doi.org/10.7213/reb.v30i70/72.22807

Palabras clave:

Microbiology, Waters, Rivers, Contamination, Coliforms

Resumen

An unknown parcel of the planet water is contaminated by chemical and/or biological agents. Human and other animals excreta have been associated to many infectious diseases that can be disseminated through contaminated water. Enteric bacteria and other pathogens can cause gastroenteritis, cholera, systemic infections, among others. Once in the environment, these microorganisms can persist for large periods of time and under certain conditions can even replicate, increasing their number. This paper aimed the research and evaluation of survival rates for total coliforms, fecal coliforms (Escherichia coli) and Pseudomonas aeruginosa in natura water samples from Passaúna and Iraí barrages and Iguaçú River, in Curitiba, Paraná. Colimetric analysis of water samples were performed by the membrane filtration method 64 Freitas MP, Blaskowski MMM, Dalke CR, Dalzoto PR, Pimentel IC. Estud and P. aeruginosa research was assayed using the multiple tubes method in Asparagin and Acetamyde Broth. Confirmatory tests such as catalase presence, citocrome oxidase test and pigment P (pyocyanin) production were also performed. It was observed the occurrence of total coliforms in water samples from Iguaçú River for approximately 50 days, while in Iraí and Passaúna barrages, the periods were 35 and 14 days, respectively. Fecal coliforms were found for about 35 days in samples from Iguaçú River and Iraí barrage, while in Passaúna barrage only for 14 days. P. aeruginosa persisted for approximately 63 days in all the water samples assayed. The higher persistence rate observed in P. aeruginosa can be related to an antagonism towards total and fecal coliforms, which had their populations decreased.

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Publicado

2008-11-27

Cómo citar

Freitas, M. P., laskowski, M. M. M., Dalke, C. R., Dalzoto, P. do R., & Pimentel, I. C. (2008). PERSISTENCE OF TOTAL AND FECAL COLIFORMS AND Pseudomonas aeruginosa IN IN NATURA WATER SAMPLES FROM RIVERS THAT SUPPLY A WATER TREATMENT STATION IN CURITIBA, BRAZIL. Estudos De Biologia, 30(70/72). https://doi.org/10.7213/reb.v30i70/72.22807

Número

Sección

Fluxo Contínuo