Simultaneous effects of environmental factors on motile Aeromonas dynamics in an urban effluent and in the natural seawater

Water Research
Sami MaalejSam Dukan

Abstract

Seasonal dynamics of motile Aeromonas in a treated urban effluent and in natural seawater along the Sfax coast (Mediterranean sea, Tunisia) were measured over a year concurrently with seven environmental factors, and compared with those of faecal coliforms. Counts for Aeromonas from a standard plate count method, ranged from 1.48 x 10(5)CFU.100 ml(-1) to 2.2 x 10(8)CFU.100 ml(-1) in the effluent and from 7.9 x 10(3)CFU.100 ml(-1) to undetectable level in the surface marine waters. Contrary to faecal coliforms, the Aeromonas dynamics exhibited a seasonal distribution in seawater which was inverse of the seasonal distribution in the sewage: From the end of November 1998 to April 1999 (cold period), Aeromonas counts increased in the treated effluent, while it decreased very rapidly in seawater. From May to October (warm period), Aeromonas abundance decreased in the effluent but showed an increasing fluctuating trend in the marine waters with a maximum in late summer/early autumn when the temperatures were around 22-23 degrees C. Multiple correlation and regression analyses suggest, by the coefficient of determination (R(2)), that 42% of variance in Aeromonas number changes in the treated effluent, may be explained by only turbidit...Continue Reading

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Citations

Jun 16, 2012·TheScientificWorldJournal·Isoken H IgbinosaAnthony I Okoh
Aug 8, 2009·Journal of Applied Microbiology·V CalhauI Henriques
Jan 23, 2020·Veterinary Research Communications·Marta ZdanowiczPiotr Perliński

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