ISSN:
1573-6857
Keywords:
Aeromonas hydrophila
;
microbiological quality
;
virulence factors
;
water supply
;
sanitation program
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract In Argentine, water municipal supplies disinfection is carried out by chlorine. We have isolated Aeromonas hydrophilafrom a chlorinated water supply in Buenos Aires that fulfilled Argentinean microbiological quality standards. It is an aquatic organism that could produce cytotoxins and enterotoxins associated with acute gastroenteritis and wound infections in human and hemorrhagic septicaemia of fish, reptiles and amphibians. The isolated strain produced protein bands at isoelectric point in the range of 4.6–5.3 lightly labile at 56°C and heat labile at 100°C non cholera antitoxin reactive in electrofocusing assay (IEF) and showed hemolytic activity thermolabile at 56°C and 100°C in 5% rabbit erythrocytes in phosphate buffered saline. A cytotoxic effect thermolabile at 56°C and 100°C and a cytotonic activity were demonstrated in Vero cell cultures. Survival assay of A. hydrophilaand indicator organisms would show no correlation between their contamination sources. Biofilms production could explain the persistence of this gram negative pathogen organism in chlorinated tap water. A water system supply maintenance program and pasteurisation may be performed in spite of water chlorination.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1004025907858
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