Comparison of Salmonella enterica serovar distribution and antibiotic resistance patterns in wastewater at municipal water treatment plants in two California cities

To determine Salmonella enterica serovars and antibiotic resistance (ABR) in the human waste stream. Sampling of influent wastewater at municipal treatment plants in two California cities was performed by collecting composite samples, over a 24-h period, from the treatment plants on five to six occa...

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Bibliographic Details
Published in:Journal of applied microbiology 2006-12, Vol.101 (6), p.1309-1316
Main Authors: Berge, A.C.B, Dueger, E.L, Sischo, W.M
Format: Article
Language:English
Subjects:
Anti-Bacterial Agents
Antibiotic resistance
antibiotic resistance patterns
Biological and medical sciences
California
Cities
Drug Resistance, Bacterial
Fundamental and applied biological sciences. Psychology
Microbial Sensitivity Tests
Microbiology
municipal wastewater
Salmonella enterica
Salmonella enterica - isolation & purification
Serotyping
Waste Disposal, Fluid
Water Microbiology
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Summary:To determine Salmonella enterica serovars and antibiotic resistance (ABR) in the human waste stream. Sampling of influent wastewater at municipal treatment plants in two California cities was performed by collecting composite samples, over a 24-h period, from the treatment plants on five to six occasions. Serial water quantities were filtered and cultured with a Salmonella selective method and an oxytetracycline-supplemented Salmonella selective method. Antibiotic susceptibilities to 12 antibiotics were determined and the isolates were grouped based on ABR patterns. From 983 S. enterica isolated, 102 represented unique sampling-serovar-ABR patterns. Thirty-five different serovars were identified to be distributed over 17 different ABR patterns. The serovar distribution differed between the sampling sites, whereas there was no significant trend in levels of multiple ABR. Salmonella enterica was recovered with ease from small sample volumes of wastewater received by municipal water treatment plants. A large variety of serovars and ABR profiles were represented in the recovered Salmonella. The ease of sampling and recovery of Salmonella from municipal wastewater from treatment plants makes it a valuable sampling approach for monitoring the presence of Salmonella in the human population.
ISSN:1364-5072
1365-2672
DOI:10.1111/j.1365-2672.2006.03031.x