Municipal wastewater effluents as a source of listerial pathogens in the aquatic milieu of the Eastern Cape Province of South Africa: a concern of public health importance.

International Journal of Environmental Research and Public Health
Emmanuel E O OdjadjareAnthony I Okoh

Abstract

We evaluated the effluent quality of an urban wastewater treatment facility in South Africa and its impact on the receiving watershed for a period of 12 months. The prevalence and antimicrobial susceptibility of potential Listeria pathogens (L. ivanovii and L. innocua) and the physicochemical quality of the treated wastewater effluent was assessed, with a view to ascertain the potential health and environmental hazards of the discharged effluent. Total listerial density varied between 2.9 x 10(0) and 1.2 x 10(5) cfu/mL; free living Listeria species were more prevalent (84%), compared to Listeria species attached to planktons (59-75%). The treated effluent quality fell short of recommended standards for turbidity, dissolved oxygen, chemical oxygen demand, nitrite, phosphate and Listeria density; while pH, temperature, total dissolved solids and nitrate contents were compliant with target quality limits after treatment. The Listeria isolates (23) were sensitive to three (15%) of the 20 test antibiotics, and showed varying (4.5-91%) levels of resistance to 17 antibiotics. Of seven resistance gene markers assayed, only sulII genes were detected in five (22%) Listeria strains. The study demonstrates a potential negative impact of th...Continue Reading

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Citations

Oct 22, 2011·Environmental Monitoring and Assessment·Vincent N ChigorAnthony I Okoh
Dec 15, 2012·Environmental Science and Pollution Research International·Vincent N ChigorAnthony I Okoh
Mar 20, 2013·Environmental Science and Pollution Research International·Ana Rita Varela, Célia M Manaia
Apr 17, 2012·Applied and Environmental Microbiology·Brian D SaudersMartin Wiedmann
Jul 26, 2012·International Journal of Environmental Research and Public Health·Emmanuel E OdjadjareAnthony I Okoh
Dec 4, 2012·International Journal of Environmental Research and Public Health·Mirriam E NyenjeRoland N Ndip
Nov 11, 2011·International Journal of Molecular Sciences·Dambudzo Penduka, Anthony I Okoh
Aug 29, 2012·TheScientificWorldJournal·Dambudzo Penduka, Anthony I Okoh
Jul 25, 2014·Annals of Clinical Microbiology and Antimicrobials·Dambudzo PendukaAndy Opoku
Sep 27, 2015·Environmental Science and Pollution Research International·Timothy SibandaMemory Tekere
Apr 5, 2016·Environmental Science and Pollution Research International·Jing WangChao Wang
Aug 14, 2015·International Journal of Environmental Research and Public Health·Peng ZhangJianjian Wang
Jan 14, 2021·International Journal of Environmental Research and Public Health·Liyabona MpondoAnthony Ifeanyi Okoh

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