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Sagar SS, Rani S, Pushpa Sadanandan S. Combined Effect of Isolated Bacteriophage and Neem Extract on Isolated Multiple Drug-Resistant Pathogenic Escherichia coli E1 From Well Water. ENVIRONMENTAL HEALTH INSIGHTS 2023; 17:11786302231166818. [PMID: 37223331 PMCID: PMC10201146 DOI: 10.1177/11786302231166818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Accepted: 03/13/2023] [Indexed: 05/25/2023]
Abstract
Multiple drug-resistant Escherichia coli (E. coli) is a serious cause of concern, and they can be observed in hospital settings, natural environment, and animals. Dissemination of multiple drug-resistant (MDR) E. coli can pose a high risk to public health. Moreover, they are hard to control with commercial antibiotics, since they have acquired resistance against most of them. Therefore, to control multiple drug-resistant bacteria, alternative strategies have been adopted such as phage therapy, herbal remedies, nanoparticles etc. In the current study, the combined application of neem leaf extract and bacteriophage is used to control an isolated multiple drug-resistant E. coli E1. We have applied 0.1 mg/ml concentration of neem extract in combination with an isolated phage vB_EcoM_C2 of 1011 titer and found that the combinatorial treatment approach significantly controls the growth of E. coli E1 as compared to a single non-combinatorial treatment. In this study, every E. coli cell is targeted by 2 antimicrobials (phage and neem extract) at the same time, which is more effective as compared to the sole treatment. Implementation of the neem extract with phage opens a new alternative approach to the chemotherapeutics for the control of multiple drug-resistant bacterial pathogens. This approach may be effective, economical, and eco-friendly to combat MDR.
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Affiliation(s)
- Sadhana Singh Sagar
- Sadhana Singh Sagar, Ecology and
Environment Research Group, Center for Water Resources Development and
management, Kunnamangalam, Kozhikode 673571, Kerala.
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Yoneda I, Rozanah UN, Nishiyama M, Mith H, Watanabe T. Detection and genetic analysis of Escherichia coli from Tonle Sap Lake and its tributaries in Cambodia: Spatial distribution, seasonal variation, pathogenicity, and antimicrobial resistance. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 315:120406. [PMID: 36252883 DOI: 10.1016/j.envpol.2022.120406] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Revised: 09/08/2022] [Accepted: 10/06/2022] [Indexed: 06/16/2023]
Abstract
As an indicator of fecal contamination, Escherichia coli was monitored in Tonle Sap Lake, Cambodia, and its tributaries during low- and high-water seasons, focusing on the impacts on floating villagers inhabiting boathouses. E. coli concentrations in the floating villages (3.6 × 103 and 5.7 × 103 CFU/100 mL during the low- and high-water seasons, respectively) were significantly higher than those in other lake sites (4.0 × 101 and 7.0 × 100 CFU/100 mL during the low- and high-water seasons, respectively) and rivers (3.3 × 102 and 8.9 × 102 CFU/100 mL during the low- and high-water seasons, respectively), most likely because fecal materials from the boathouses were discharged without treatment. At most of the lake sampling sites remote from the boathouses, the E. coli concentration was lower during the high-water season than that during the low-water season, due to dilution by lake water. E. coli colonies detected during monitoring were isolated for pathotyping, antimicrobial susceptibility testing, beta-lactamase gene detection, and multilocus sequencing typing (MLST). Of the 659 E. coli isolates, 101 (15.3%) were diarrheagenic E. coli (DEC). The prevalence of DEC (52.2%) in the floating villages during the low-water season was higher than that during the high-water season (4.2%) and that in other sites during both seasons (10.6-21.3%). The DEC isolates from the floating villages during the low-water season showed high antimicrobial resistance, including ampicillin (83.4%) and ciprofloxacin (83.4%), and frequently possessed a beta-lactamase gene (blaTEM) (83.4%). MLST analysis indicated that the predominant sequence type (ST) of DEC isolates from the floating villages possibly originated from humans, whereas more diverse STs were detected in isolates from other sites. We revealed the wide presence of diarrheagenic and antimicrobial-resistant E. coli in Tonle Sap Lake and identified a considerable infection risk in floating villages, especially during the low-water season.
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Affiliation(s)
- Ichiro Yoneda
- Department of Regional Environment Creation, United Graduate School of Agricultural Sciences, Iwate University, 18-8 Ueda 3-Chome, Morioka, 020-8850, Japan.
| | - Ulya Nur Rozanah
- Department of Agricultural Microbiology, Faculty of Agriculture, Gadjah Mada University, Bulaksumur, Yogyakarta, 55281, Indonesia
| | - Masateru Nishiyama
- Department of Food, Life and Environmental Sciences, Faculty of Agriculture, Yamagata University, 1-23 Wakaba-Machi, Tsuruoka, 997-8555, Japan
| | - Hasika Mith
- Faculty of Chemical and Food Engineering, Institute of Technology of Cambodia, Russian Federation Blvd., P.O. Box 86, Phnom Penh, 12156, Cambodia
| | - Toru Watanabe
- Department of Food, Life and Environmental Sciences, Faculty of Agriculture, Yamagata University, 1-23 Wakaba-Machi, Tsuruoka, 997-8555, Japan
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Asada Y, Chua ML, Tsurumi M, Yamauchi T, Nyambe I, Harada H. Detection of Escherichia coli, rotavirus, and Cryptosporidium spp. from drinking water, kitchenware, and flies in a periurban community of Lusaka, Zambia. JOURNAL OF WATER AND HEALTH 2022; 20:1027-1037. [PMID: 35902985 DOI: 10.2166/wh.2022.276] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Fecal contamination with a poor water, sanitation and hygiene environment in urban informal settlements poses diarrhea risks. Little information is available on the contamination of environmental media with enteric pathogens in such settlements. We investigated the contamination of Escherichia coli, rotavirus, and Cryptosporidium spp. in water, on kitchenware, and on flies in urban informal settlements of Chawama and Kanyama, Lusaka, Zambia. These environmental media were examined by XM-G agar cultivation for E. coli and specific real-time RT-PCR assays to detect rotavirus and Cryptosporidium spp. E. coli; rotavirus, and Cryptosporidium spp. were detected in samples of household stored drinking water (6 of 10 samples, 3 of 10 samples, and 2 of 10 samples, respectively), cups (10 of 20 samples, 2 of 13 samples, 1 of 13 samples, respectively), and flies (35 of 55 samples, 5 of 17 samples, 1 of 17 samples, respectively). The ranges of rotavirus concentrations in household stored drinking water, on cups, and flies were 2.9 × 102-2.2 × 105 copies/L, 1.2 × 102-4.3 × 102 copies/cup, and 5.0 × 101-2.0 × 102 copies/fly, respectively. These results indicate the contribution of drinking water and kitchenware to enteric pathogen exposure and potential role of flies in microbial transmission.
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Affiliation(s)
- Yasuhiro Asada
- Department of Environmental Health, National Institute of Public Health, Saitama, Japan
| | - Min Li Chua
- Graduate School of Global Environmental Studies, Kyoto University, Kyoto, Japan
| | - Mayu Tsurumi
- Graduate School of Global Environmental Studies, Kyoto University, Kyoto, Japan
| | - Taro Yamauchi
- Graduate School of Health Sciences, Hokkaido University, Sapporo, Japan; Research Institute for Humanity and Nature, Kyoto, Japan
| | - Imasiku Nyambe
- Integrated Water Resources Management Centre, c/o School of Mines, University of Zambia, Lusaka, Zambia
| | - Hidenori Harada
- Research Institute for Humanity and Nature, Kyoto, Japan ; Graduate School of Asian and African Area Studies, Kyoto University, Kyoto, Japan
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Nopprapun P, Boontanon SK, Piyaviriyakul P, Sweattatut R, Fujii S, Harada H. Human source identification by using a human-associated Escherichia coli genetic marker in the Mae Klong River, Thailand. JOURNAL OF WATER AND HEALTH 2022; 20:794-802. [PMID: 35635773 DOI: 10.2166/wh.2022.296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Contamination caused by microbial fecal pollution in water bodies is a serious problem in many countries, especially in low- and middle-income countries. Therefore, fecal source tracking is an important method used to understand the source of fecal contamination and to decrease the hazard of waterborne diseases that occurs in the environment. In this study, a human-associated genetic marker for Escherichia coli (H8) was used to investigate the source of fecal contamination in the Mae Klong River, Thailand. Real-time PCR was performed with this marker for 500 E. coli isolates collected from 10 sampling sites along the river, including MK10 (upstream) to MK1 (downstream). The results showed that the proportions of H8-positive isolates were 46, 14, 10, 18, 14, 38, 12, 26, 32, and 14% at MK10-MK1, respectively. All positive proportions were significantly different between the locations (p < 0.001). The higher occurrence of E. coli with H8 marker detection indicated that domestic wastewater was largely discharged without proper treatment, which is attributable to the high population and the absence of proper sewage treatment in those areas.
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Affiliation(s)
- Pimchanok Nopprapun
- Civil and Environmental Engineering Department, Faculty of Engineering, Mahidol University, Salaya, Nakhon Pathom 73170, Thailand E-mail:
| | - Suwanna Kitpati Boontanon
- Civil and Environmental Engineering Department, Faculty of Engineering, Mahidol University, Salaya, Nakhon Pathom 73170, Thailand E-mail: ; Graduate School of Global Environmental Studies, Kyoto University, Yoshida-honmachi, Sakyo, Kyoto 606-8501, Japan
| | - Pitchaya Piyaviriyakul
- Civil and Environmental Engineering Department, Faculty of Engineering, Mahidol University, Salaya, Nakhon Pathom 73170, Thailand E-mail:
| | - Rawiwan Sweattatut
- Civil and Environmental Engineering Department, Faculty of Engineering, Mahidol University, Salaya, Nakhon Pathom 73170, Thailand E-mail:
| | - Shigeo Fujii
- Graduate School of Global Environmental Studies, Kyoto University, Yoshida-honmachi, Sakyo, Kyoto 606-8501, Japan
| | - Hidenori Harada
- Graduate School of Asian and African Area Studies, Kyoto University, 46 Yoshida-shimoadachi-cho, Sakyo, Kyoto 606-8501, Japan
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Chua ML, Ahsan MN, Sakai A, Fujii S, Goto S, Kodera M, Harada H. Seasonal and gender impacts on fecal exposure trends in an urban slum. JOURNAL OF WATER AND HEALTH 2021; 19:946-958. [PMID: 34874902 DOI: 10.2166/wh.2021.111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Seasonal and gender impacts have not been well considered in fecal exposure assessment, especially in low- and middle-income countries. This study examined the seasonal and gender impacts on fecal exposure trends in children through daily living activities in an urban slum in Bangladesh. We determined Escherichia coli concentrations in seven types of environmental samples (n = 232) and the activity data of children via diary recording, questionnaires, and interview surveys. Daily and monthly exposures were stochastically estimated for drinking, eating, pond bathing, well bathing, and hand-to-mouth contact. Of the five pathways, pond bathing and drinking contributed a large part of the daily and monthly exposure. Significant seasonal differences were observed in daily exposures for bathing, which were higher in the rainy season (2.59 × 102 CFU/day for boys and 6.19 × 10-1 CFU/day for girls) than in the dry season (1.69 × 102; 4.30 × 10-2), because of longer pond bathing time and more contaminated bathing water in the rainy season. In contrast, eating had significantly higher exposure in the dry season (3.71 × 10; 3.22 × 10) than the rainy season (1.50 × 10; 1.24 × 10) due to the higher dish contamination. Significantly higher daily exposure was observed in the bathing for boys than girls, as boys spent longer time for bathing at a heavily contaminated pond.
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Affiliation(s)
- Min-Li Chua
- Graduate School of Global Environmental Studies, Kyoto University, Yoshida-honmachi, Sakyo-ku, Kyoto 606-8501, Japan
| | - Md Nazmul Ahsan
- Life Science School, Khulna University, Gallamari, Khulna 9208, Bangladesh
| | - Akira Sakai
- University of Marketing and Distribution Sciences, 3-1 Gakuen-Nishimachi, Nishi-ku, Kobe 651-2188, Japan
| | - Shigeo Fujii
- Graduate School of Global Environmental Studies, Kyoto University, Yoshida-honmachi, Sakyo-ku, Kyoto 606-8501, Japan
| | - Shotaro Goto
- Graduate School of Global Environmental Studies, Kyoto University, Yoshida-honmachi, Sakyo-ku, Kyoto 606-8501, Japan
| | - Michiya Kodera
- Graduate School of Global Environmental Studies, Kyoto University, Yoshida-honmachi, Sakyo-ku, Kyoto 606-8501, Japan
| | - Hidenori Harada
- Graduate School of Asian and African Area Studies, Kyoto University, 46 Yoshida-shimoadachicho, Sakyo-ku, Kyoto 606-8501, Japan E-mail:
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Chen D, Mechlowitz K, Li X, Schaefer N, Havelaar AH, McKune SL. Benefits and Risks of Smallholder Livestock Production on Child Nutrition in Low- and Middle-Income Countries. Front Nutr 2021; 8:751686. [PMID: 34778344 PMCID: PMC8579112 DOI: 10.3389/fnut.2021.751686] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Accepted: 09/29/2021] [Indexed: 12/12/2022] Open
Abstract
Livestock production may improve nutritional outcomes of pregnant women and children by increasing household income, availability of nutrient-dense foods, and women's empowerment. Nevertheless, the relationship is complex, and the nutritional status of children may be impaired by presence of or proximity to livestock and their pathogens. In this paper, we review the benefits and risks of livestock production on child nutrition. Evidence supports the nutritional benefits of livestock farming through income, production, and women's empowerment. Increasing animal source food consumption requires a combination of efforts, including improved animal management so that herd size is adequate to meet household income needs and consumption and addressing sociocultural and gendered norms. Evidence supports the inclusion of behavior change communication strategies into livestock production interventions to facilitate the sustainability of nutritional benefits over time, particularly interventions that engage women and foster dimensions of women's empowerment. In evaluating the risks of livestock production, evidence indicates that a broad range of enteric pathogens may chronically infect the intestines of children and, in combination with dietary deficits, may cause environmental enteric dysfunction (EED), a chronic inflammation of the gut. Some of the most important pathogens associated with EED are zoonotic in nature with livestock as their main reservoir. Very few studies have aimed to understand which livestock species contribute most to colonization with these pathogens, or how to reduce transmission. Control at the point of exposure has been investigated in a few studies, but much less effort has been spent on improving animal husbandry practices, which may have additional benefits. There is an urgent need for dedicated and long-term research to understand which livestock species contribute most to exposure of young children to zoonotic enteric pathogens, to test the potential of a wide range of intervention methods, to assess their effectiveness in randomized trials, and to assure their broad adaptation and sustainability. This review highlights the benefits and risks of livestock production on child nutrition. In addition to identifying research gaps, findings support inclusion of poor gut health as an immediate determinant of child undernutrition, expanding the established UNICEF framework which includes only inadequate diet and disease.
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Affiliation(s)
- Dehao Chen
- Department of Environmental and Global Health, College of Public Health and Health Professions, University of Florida, Gainesville, FL, United States
- Emerging Pathogens Institute, University of Florida, Gainesville, FL, United States
| | - Karah Mechlowitz
- Department of Social and Behavioral Sciences, College of Public Health and Health Professions, University of Florida, Gainesville, FL, United States
| | - Xiaolong Li
- Department of Environmental and Global Health, College of Public Health and Health Professions, University of Florida, Gainesville, FL, United States
- Emerging Pathogens Institute, University of Florida, Gainesville, FL, United States
| | - Nancy Schaefer
- Health Science Center Libraries, University of Florida, Gainesville, FL, United States
| | - Arie H. Havelaar
- Emerging Pathogens Institute, University of Florida, Gainesville, FL, United States
- Department of Animal Sciences, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL, United States
- Institute for Sustainable Food Systems, University of Florida, Gainesville, FL, United States
| | - Sarah L. McKune
- Department of Environmental and Global Health, College of Public Health and Health Professions, University of Florida, Gainesville, FL, United States
- Center for African Studies, University of Florida, Gainesville, FL, United States
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Is It Human or Animal? The Origin of Pathogenic E. coli in the Drinking Water of a Low-Income Urban Community in Bangladesh. Trop Med Infect Dis 2021; 6:tropicalmed6040181. [PMID: 34698298 PMCID: PMC8544722 DOI: 10.3390/tropicalmed6040181] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 09/14/2021] [Accepted: 09/14/2021] [Indexed: 01/21/2023] Open
Abstract
This study aimed to investigate the origin of diverse pathotypes of E. coli, isolated from communal water sources and from the actual drinking water vessel at the point-of-drinking inside households in a low-income urban community in Arichpur, Dhaka, Bangladesh, using a polymerase chain reaction (PCR). Forty-six percent (57/125, CI 95%: 41−58) of the isolates in the point-of-drinking water and 53% (55/103, CI 95%: 45−64) of the isolates in the source water were diarrheagenic E. coli. Among the pathotypes, enterotoxigenic E. coli (ETEC) was the most common, 81% (46/57) of ETEC was found in the point-of-drinking water and 87% (48/55) was found in the communal source water. Phylogenetic group B1, which is predominant in animals, was the most frequently found isolate in both the point-of-drinking water (50%, 91/181) and in the source (50%, 89/180) water. The phylogenetic subgroup B23, usually of human origin, was more common in the point-of-drinking water (65%, 13/20) than in the source water (35%, 7/20). Our findings suggest that non-human mammals and birds played a vital role in fecal contamination for both the source and point-of-drinking water. Addressing human sanitation without a consideration of fecal contamination from livestock sources will not be enough to prevent drinking-water contamination and thus will persist as a greater contributor to diarrheal pathogens.
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Nopprapun P, Boontanon SK, Harada H, Surinkul N, Fujii S. Evaluation of a human-associated genetic marker for Escherichia coli (H8) for fecal source tracking in Thailand. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2020; 82:2929-2936. [PMID: 33341782 DOI: 10.2166/wst.2020.525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
High levels of microbial fecal pollution are a major concern in many countries. A human-associated genetic marker for Escherichia coli (H8) has recently been developed for fecal source tracking. The assessment of the H8 marker performance is crucial before it can be applied as a suitable method for fecal source tracking in each country. The performance (specificity and sensitivity) of the H8 marker was evaluated by using non-target host groups (cattle, buffalo, chicken, duck, and pig feces) and target host groups (influent and effluent from a wastewater treatment plant and septages). SYBR based real-time PCR (polymerase chain reaction) was done on 400 E. coli isolates from non-target and target host groups after E. coli isolation. It was found that the specificity from animal feces samples collected in Thailand was 96%. Moreover, influent, effluent, and septage samples showed the values of the sensitivity at 18, 12, and 36%, respectively. All of the non-target host groups were found to be significantly different with positive proportions from the target host group (septage samples) (p ≤ 0.01). Based on the results, this marker is recommended for use as a human-associated E. coli marker for identifying sources of fecal pollution in Thailand.
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Affiliation(s)
- Pimchanok Nopprapun
- Civil and Environmental Engineering Department, Mahidol University, Salaya, Nakhon Pathom, 73170, Thailand E-mail:
| | - Suwanna Kitpati Boontanon
- Civil and Environmental Engineering Department, Mahidol University, Salaya, Nakhon Pathom, 73170, Thailand E-mail: ; Graduate School of Global Environmental Studies, Kyoto University, Yoshida-Honmachi, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Hidenori Harada
- Graduate School of Global Environmental Studies, Kyoto University, Yoshida-Honmachi, Sakyo-ku, Kyoto, 606-8501, Japan; Graduate School of Asian and African Area Studies, Kyoto University, 46 Yoshida-Shimoadachi, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Nawatch Surinkul
- Civil and Environmental Engineering Department, Mahidol University, Salaya, Nakhon Pathom, 73170, Thailand E-mail:
| | - Shigeo Fujii
- Graduate School of Global Environmental Studies, Kyoto University, Yoshida-Honmachi, Sakyo-ku, Kyoto, 606-8501, Japan
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