Experimental analisys on Escherichia coli viability in salt water

Authors

  • Regine Helena Silva dos Fernandes Vieira Professor Adjunto do Departamento de Engenharia de Pesca e Pesquisador do Instituto de Ciências do Mar, Universidade Federal do Ceará, Av. da Abolição, 3207, Fortaleza, CE 60165-081, Brasil.
  • Ana Isabel Mota Silva Engenheira de Pesca, graduada pela Universidade Federal do Ceará.
  • Oscarina Viana de Sousa Engenheira de Pesca, graduada pela Universidade Federal do Ceará.
  • Ernesto Hofer Instituto Oswaldo Cruz-FIOCRUZ, Rio de Janeiro, Brasil.
  • Gustavo H. F. Vieira Professor Titular do Departamento de Biologia da Universidade Vale do Acaraú-UVA, Sobral, Estado do Ceará.
  • Silvana Saker Sampaio Professor Adjunto do Departamento de Engenharia de Pesca, Universidade Federal do Ceará, Campus do Pici, Fortaleza, Brasil.
  • Elenice Araújo de Lima Bolsista do Programa Especial de Treinamento (PET), Universidade Federal do Ceará.

DOI:

https://doi.org/10.32360/acmar.v34i1-2.11651

Keywords:

Escherichia coli, viability, strain resistance, sea water.

Abstract

Five experiments were carried out in order to investigate the resistance of Escherichia coli strains isolated from Cocó River and inoculated in sea water, stored in laboratory at environmental temperature. The strains of E. coli were incubated at 37 and 44.5 o C. The initial inocule (Ti) was of 166 x 109 CFU/ml. The time of each experiment was 168 h. Sea water resistant strains were counted at T0 (time which the inocule was introduced into the sea water), T1, T2, T24, T120 and T168h. Up to 168 h, for all experiments, it was possible to detect viable strains of E. coli. There was no statistically significantly difference (α = 0.05) between experiments, considering the strains were isolated from the same place and were treated on the same manner. Other factors, such as UV rays, may be more deleterious to the cell than salt concentration in sea water itself.

Published

2017-04-10

Issue

Section

Artigos originais