Population dynamics ofAeromonasspp. in an urban river watershed

Abstract

Density of Aeromonas spp. at one site in the Buffalo River and at four sites on its upstream tributaries was followed from June 1992–June 1993. Membrane filtration counts of Aeromonas during the summer ranged between 18 and 4000 ml−1, which were one to two logs higher than faecal coliform and faecal streptococci densities. Aeromonas spp. in the Buffalo River, and faecal coliforms, faecal streptococci, and the heterotrophic plate count throughout the watershed, increased by approximately one log during summer rainstorms. However, Aeromonas spp. increased only by a factor of two during rainstorms at the upstream sites. Aeromonas spp. showed a strong positive correlation with both indicator bacteria and total suspended solids at the upstream sites during the summer but not the winter. Correlations between Aeromonas and indicator bacteria remained strong in the Buffalo River during the winter, signifying that different conditions exist in the Buffalo River and its upstream tributaries. The strong correlation between Aeromonas spp. and indicator bacteria in the Buffalo River suggest that, in the absence of media capable of the quantitative recovery of potentially pathogenic aeromonads, standard faecal coliform analyses may adequately assess public health risks from Aeromonas spp. in an urban river used for recreational purposes.

Associated microbial community of two deep water infected sponge Hippospongia sp. and Cacospongia sp.

“…and Pseudomonas sp. are typically water-borne bacterial genera and include opportunistic pathogenic species to crustaceans, fish and other aquatic organisms, as well as to humans [24][25][26]. In contrast, our results have shown that E. coli, appeared in all samples of Spongia officinalis [5].…”

Biofilm and Sediment are Major Reservoirs of Virulent Aeromonas hydrophila (vAh) in Catfish Production Ponds

“…Aeromonas hydrophila is a ubiquitous bacterium of freshwater environments where it can be found in water and sediments as well as in association with coldwater vertebrates (Pettibone ; Zhang et al. ; Lee et al.…”

Changes in abundance and community structure of bacteria associated with buoyantMicrocystiscolonies during the decline of cyanobacterial bloom (autumn–winter transition)

“…Both micro-organisms were not observed to inhabit Microcystis colonies in summer during the bloom (Shi et al, 2010). Aeromonas has been found in wastewater, chlorinated water supplies, surface water and ground water, as well as estuarine and marine environments (Borrell et al, 1998;Pettibone, 1998;Bianucci et al, 2001). Some bacterial strains of these species are cold-adapted (Singh et al, 2000).…”