Incidence of Aeromonas species in influent and effluent of urban wastewater purification plants

Influent and effluent samples from urban wastewater plants were examined for presumptive Aeromonas. Removal efficiency was comparatively low for both presumptive Aeromonas (96.5%) and faecal coliforms (95.8%). Starch ampicillin agar (SA) medium was superior to mA medium for selectivity, with 32.3% of typical colonies confirmed as Aeromonas spp., and for the recovery of Aer. veronii biotype veronii.

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