Bacteria of Public Health Significance Associated with Fish Reared in Treated Wastewater

摘要

The suitability of tertiary wastewater ponds for aquaculture was evaluated in terms of fish productions obtained and the significance of bacteria in the wastewater and from fish. Silver carp (Hypothalmichthyes molitrix) were stocked into tertiary wastewater ponds at 10,000 fish per hectare and cultured five months. Fish growth was determined monthly. Bacterial evaluations of water and fish were made monthly. Pour plates of the appropriate media were made to determine total plate count, fecal coliforms and fecal streptococci. Enrichment procedures were used to isolate Salmonella. The relative abundance of selected bacterial colony types was found over the course of the experiment. Selected isolates were identified. Net production of fish was 1,309.2 kg/ha with the average weight of fish produced being 204.6 grams. Streptococcus faecalis was the most common fecal streptococcus from both water and fish.