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Isolation and biocontrol of bacteriophages from wastewater in the city of Lomé, Togo: potential application as a novel source for antimicrobial therapy

1Ouedraogo, A. K., *1Hoekou, Y., 2Gbekley, H. E., 1Pissang, P., 1Kpatagnon K., 1Sossou, K., 2Melila, M., 3Djeri, B., and 1Tchacondo, T.

1Laboratory of Biomedical and Food Sciences and Environmental Health, Advanced School of Biological and Food Processing Techniques, Université de Lomé, Togo
2Faculty of Sciences, Laboratory of the Department of Biochemistry, Université de Lomé, Togo
3Laboratory of Microbiology and Food Quality Control, Advanced School of Biological and Food Processing Techniques, Université de Lomé, Togo

*Correspondence to: yhoekou@gmail.com; 0022890259591

Abstract:
Background: Bacteriophages offer one of the most promising solutions to the challenges of antimicrobial resistance in bacteria. The aim of this study is to investigate bacteriophages as a source of new antimicrobial therapy.

Methodology: Waste water samples were randomly collected from 8 different locations in the city of Lomé for bacteriophage isolation. The phages were isolated using multi-resistant clinical isolates (Escherichia coli 1642 and Staphylococcus aureus 0868) as hosts by means of a spot test. The host range of the phages was determined also by a spot test using 8 other clinical bacterial isolates including two reference strains (E. coli ATCC 25922 and S. aureus ATCC 29213). The virulence of the phages and their effects on bacterial growth were assessed by in vitro experiments using E. coli 1642 BBec phage suspension. Continue reading “Isolation and biocontrol of bacteriophages from wastewater in the city of Lomé, Togo: potential application as a novel source for antimicrobial therapy”

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Phytochemical and antibacterial activity of Mangifera indica Linn (Mango) bark and leaf extracts on bacteria isolated from domestic wastewater samples

1Omotayo, O. E., 2Oladipo, G. A., 3Adekunle, D. O., and 2Akinola, O. T.

1Pure and Applied Biology Programme, College of Agriculture, Engineering and Science,
P. M. B 284, Iwo, Osun State, Nigeria
2Microbiology Programme, College of Agriculture, Engineering and Science, P.M.B 284, Iwo, Osun State, Nigeria
3Industrial Chemistry Programme, College of Agriculture, Engineering and Science,
P. M. B 284, Iwo, Osun State, Nigeria
*Correspondence to: olumide.omotayo@bowen.edu.ng; +234 802 379 9838

Abstract:
Background: Wastewaters generated from ubiquitous use of water in daily human activities often contains various pathogenic microorganisms, which may contaminate surface or ground waters when released indiscriminately into the environment. Consumption of natural water resources polluted by such contaminated wastewaters may compromise public health and decrease the populations of aquatic organisms in such water bodies. Mangifera indica (mango) plants have been widely used as remedy for treatment of a wide range of water borne ailments. This study was therefore conducted to identify bacteria contaminating wastewaters from domestic sources and to determine the antibacterial potentials of mango bark and leaf extracts against them. Continue reading “Phytochemical and antibacterial activity of Mangifera indica Linn (Mango) bark and leaf extracts on bacteria isolated from domestic wastewater samples”

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Correlation between faecal indicator bacteria in diarrheagenic stools and hospital wastewaters: implication on public health

Olalemi, A., Oladejo, B., and *Bayode, M.

Department of Microbiology, Federal University of Technology, P.M.B. 704, Akure, Nigeria

*Correspondence to: bayodemcbay@gmail.com

Abstract:

Background: Hospital wastewaters contain blends of inorganic, natural constituents and contaminants that carry significant health risk when released directly into the environment. The aim of this study is to investigate the correlation between faecal indicator bacteria in diarrheagenic stools and wastewaters generated in University of

Medical Sciences Teaching Hospital complex, Akure, Nigeria.

Methodology: Quantification of faecal indicator bacteria was carried out on diarrheagenic faecal samples collected from 55 hospitalized patients and 68 wastewater samples from the medical laboratory science and laundry units of the hospital over of period of 12 weeks. Standard membrane filtration technique was performed using membrane intestinal enterococcus (m-ENT), membrane faecal coliform (m-FC), membrane lauryl sulphate (MLSA), eosin methylene blue (EMB) and Salmonella-Shigella (SS) agar plates, which were incubated at 37ºC for 24 hours (MLSA, EMB and SSA), 44ºC for 24 hours (m-FC); and 37ºC for 48 hours (m-ENT). Bacterial colonies on agar plates were counted and expressed as colony forming units (CFU) per 100ml of diarrheagenic stool and wastewater. Pearson’s correlation analysis was used to determine the relationship between the level of faecal indicator bacteria in diarrheagenic stools and wastewaters at p<0.05 level of significance (and 95% confidence interval).

Continue reading “Correlation between faecal indicator bacteria in diarrheagenic stools and hospital wastewaters: implication on public health”