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Journal of Environmental Sciences 2010年第5期22卷 663-668页

作者： Huachang Hong Jianwen Qiu Yan Liang College of Geography and Environmental Sciences Zhejiang Norraal University Jinhua 321004 China Croucher Institute for Environmental Sciences and the Department of Biology Hong Kong Baptist University Kowloon Tong Hong Kong China

The Pearl River Delta （PRD） is one of the most developed and densely populated regions in *** the amount of pathogens in the source of drinking water is important for improving water *** collected water samples from six major water storage reservoirs in the PRD region in both wet and dry seasons in *** showed that external environmental factors,such as precipitation,location,as well as the internal environmental factors,i.e.,physicochemical properties of the water,were closely related with the distribution of ***,the coliform bacterial concentrations in wet season were one to two orders of magnitude greater than those in dry ***,coliform bacterial levels in reservoirs near urban and industrial areas were significantly higher （p 〈 0.05） than those in remote *** analyses showed that the levels of coliforms had close relationships with pH,temperature,suspended solid,organic and inorganic nutrients in *** components analysis further demonstrated that total coliforms in the reservoirs were closely related with water physicochemical properties,while fecal coliforms were more associated with external input brought in by seasonal runoff.

关键词： coliform bacteria location rainfall physicochemical parameters reservoir

Assessing the East Bay of Galveston Bay, Texas for coliform bacteria in Recreational Water

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Open Journal of Marine Science 2016年第4期6卷 472-481页

作者： Tommy Quach Luis Colon Akintayo Akinrinlola Jesse Bell Sonya Good Department of Chemistry Texas Southern University Houston TX USA

The Galveston Bay beach is a widely used recreational area that remains a concern in terms of water quality. There are many factors that contribute to its pollution such as fecal matter entering the bay due to overflow of the sewage system and run offs. Thus, evaluating the water quality for fecal matter and other pollutants is continuously monitored by citizen scientists and research groups throughout the Galveston Bay. The investigation utilizes the colorimetric response of coliform at three test sites along the East Bay of Galveston. Each response is positive for coliform that may indicate the presence of fecal matter. Other scientists have denoted the presence of fecal matter in the Galveston Bay at two sites using enterococci indicator which may be more associated with human fecal matter. The analyses show that the recreational water is likely not a threat since its levels were low. However, the need for analyses based on EPA protocols and standards is necessary to better access water pollution due to fecal matter in the Galveston Bay area.

关键词： coliform bacteria Fecal Matter bacterial Indicators Galveston Bay Enterococci

Bacillus amyloliquefaciens (IAE635) and their metabolites could purify pollutants, Vibrio spp. and coliformbacteria in coastal aquaculture wastewater

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International Journal of Agricultural and Biological Engineering 2021年第2期14卷 205-210页

作者： Yalu Shao Hua Zhong Liangkai Wang Mohammed M.A.Elbashier State Key Laboratory of Water Resources and Hydropower Engineering Science Wuhan UniversityWuhan 430072China School of Agriculture and Food The University of MelbourneVictoria 3010Australia College of Agricultural Sciences and Engineering Hohai UniversityNanjing 210098China

High-density aquaculture often causes the emission of polluted water to the marine environment in the coastal areas of *** solve the aquaculture-related water quality problems,it is appropriate to adapt eco-friendly methods,such as using microbes and their metabolic products to purify polluted *** this study,the purifying effects ofBacillus amyloliquefaciens(IAE635)metabolites(poly-γ-glutamic acid;PP)and IAE635 combined with their metabolites(MP)on turbidity,COD,NO3--N,NH4+-N,Vibrio *** bacteria in coastal aquaculture wastewater were conducted in the lab and in situ *** results showed that the removal ofturbidity,COD,NH4+-Nand NO3--Nwith PP and MP was more significant(pcoliform bacteria were decreased by 68.7%and 66.3%forPP,75.0%and 67.1%for MP,*** water purifying effect of MP was slightly better than that of *** situ pond purification test demonstrated that MP significantly lowered the concentrations of turbidity,COD,NH4+-N,NO3--N and NO2--N,which was more effective than EM.A significantly higher(pbacterial population for MP compared to PP indicatedthatMPpurifies the coastal aquaculture wastewaterby both flocculation and microbial *** application of MP will benefit the aquaculture industry by providing a novel method for the removal of chemical pollutants and pathogens.

关键词： coastal aquaculture Bacillus amyloliquefaciens and their metabolites(MP) bio-flocculants chemical pollutants Vibrio spp. coliform bacteria wastewater purification

Comparative analysis of bacterial contamination in tap and groundwater: A case study on water quality of Quetta City, an arid zone in Pakistan

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Journal of Groundwater Science and Engineering 2022年第2期10卷 153-165页

作者： Khan Tanzeel Akhtar Malik Muhammad Malghani Gohram Akhtar Rabia Department of Environmental Science Faculty of Life Sciences&InformaticsBalochistan University of Information TechnologyEngineering and Management SciencesQuetta 87300Pakistan Department of Psychology Balochistan University of Information TechnologyEngineering and Management SciencesQuetta 87300Pakistan

Water is an essential element on earth,which provides human a variety of services in domestic use,agriculture,or ***,some serious health risks of drinking water are associated with microbial contamination,particularly with fecal ***,microbial quality assessment is considered to be a necessary component of water quality *** study investigates microbial contamination of water distributary system around the city by comparing groundwater(GW)and tap water(TW)quality in Quetta city.31 GW samples and 31 TW samples were collected in the study area during the months of September,October,and *** coliform test was carried out in laboratory and their average total coliform contamination was *** showed that the TW sample were all contaminated by coliform except for Chiltan town,hence are not considered suitable for drinking without any treatment according to WHO drinking water quality *** average coliform concentrations were 12 in Quetta main city,11.6 in Jinnah town,5.3 in Satallite town,10 in Shahbaz town and 5 in Brewery town(0/100 mL CFU)and the TW samples from the three towns were even more contaminated with *** among the GW,average microbial concentrations were 1.8 in Quetta main city,2 in Satallite town,1.4 in Shahbaz town,and 0.4 in Chiltan town(0/100 mL CFU),respectively,which shows that the contamination is occurring within the water distributary pipeline system when the water flows through the ***,this research will be valuable for researchers and administrative authorities to conduct elaborative studies,and develop new policies to prevent further deterioration of drinking water in the water distribution system by pathogenic microorganisms and ensure safe drinking water to the public of Quetta city.

关键词： Groundwater quality Microbial contamination coliform bacteria Drinking water quality

Prevalence and Antimicrobial Susceptibility Status of Gram-Negative and Gram-Positive bacteria on Handheld Shopping Trolleys and Baskets in Supermarkets in Ndola, Zambia

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Open Journal of Epidemiology 2023年第4期13卷 235-249页

作者： Shivangi Patel Victor Daka Steward Mudenda Mulemba Samutela Misheck Chileshe Warren Chanda Imukusi Mutanekelwa Ephraim Chikwanda Titus Haakonde Tobela Mudenda Scott Matafwali Samson Mwale Ruth Lindizyani Mfune Public Health Department School of Medicine Copperbelt University Ndola Zambia School of Health Sciences University of Zambia Lusaka Zambia Mary Begg Health Services Ndola Zambia School of Medicine and Health Sciences Mulungushi University Livingstone Zambia Tropical Disease Research Centre Ndola Zambia Environmental Health Section School of Applied and Health Sciences Evelyn Hone College of Applied Arts and Commerce Lusaka Zambia Pathology and Laboratory Department Ndola Teaching Hospital Ndola Zambia Clinical Research Department Faculty of Infectious and Tropical Diseases London School of Hygiene & Tropical Medicine London UK

Background: Supermarkets are a place visited by individuals with different health conditions daily where microbiological contaminants through touch onto fomites such as trolleys and baskets can be passed on to other people hence potentially spreading infectious diseases. This study aimed to investigate the presence of Gram-negative and Gram-positive bacteria on handheld shopping trolleys and baskets and their antimicrobial susceptibility status against commonly used antibiotics in Zambia. Methods: A cross-sectional study was conducted. Trolleys and basket handles were swabbed and standard microbiological methods were used to identify the bacteria and disc diffusion to determine their antimicrobial susceptibility status. Data was collected from December 2021 to April 2022. Data was analysed using IBM Statistical Package for Social Sciences (SPSS) Version 22. Results: Twenty-eight percent of the 200 total samples were found to be culture-positive and predominant isolates were Staphylococcus aureus (17.3%), Pseudomonas species (4.5%), Escherichia coli (2%), Corynebacterium species (2%), Staphylococcus species (1.5%) and Enterobacter aerogenes (0.5%). Staphylococcus aureus showed the most resistance to azithromycin (17%) followed by ciprofloxacin (2.8%), nitrofurantoin (2.8%) and chloramphenicol (2.8%). Escherichia coli showed 100% resistance to amoxicillin, cloxacillin and ampicillin, 75% resistance to ciprofloxacin and the least resistance to azithromycin (25%) while it was susceptible to nitrofurantoin. Staphylococcus species, Corynebacterium species, Enterobacter aerogenes and Pseudomonas species showed no resistance to any antibiotics. Conclusion: The study showed the presence of microorganisms with considerable antimicrobial resistance to antibiotics in Zambia on trolley and basket handles indicating the need for more initiatives to address proper hygiene in public environmental sites for better infection prevention and control.

关键词： Antimicrobial Resistance coliform bacteria Staphylococcus aureus Escherichia coli Supermarket Shopping Trolleys and Baskets