期刊
JOURNAL OF WATER AND HEALTH
卷 20, 期 2, 页码 344-355出版社
IWA PUBLISHING
DOI: 10.2166/wh.2022.230
关键词
Costa Rica; Escherichia coli; fecal coliforms; Rotavirus; somatic coliphages
资金
- Tecnologico de Costa Rica
- National Technological University
- National University
- Consejo Nacional de Rectores (CONARE), University of Costa Rica
This study examines the quality of drinking water in 20 ASADAS in Costa Rica. The results show that the concentrations of fecal coliforms and E. coli are higher in water samples from region 3. Rotavirus-positive samples are more frequently detected in drinking-water samples from regions 2 and 3 during the dry season. Additionally, somatic coliphages are significantly associated with diarrheal cases in the region.
This study describes the quality of drinking water sampled over 2 years (2018 and 2019) from 20 ASADAS (Spanish acronym for Administrative Associations for Water and Sewer Systems) in Costa Rica. The analysis included Rotavirus (RV), somatic coliphages, fecal coliforms, and Escherichia coli. The ASADAS were categorized into three regions as temperate rainy (region 1), tropical rainy (region 2), and tropical rainy and dry (region 3) according to biogeographic classification. The concentrations of fecal coliforms and E. coli were higher in samples from surface water sources from the ASADAS in region 3 compared to regions 1 and 2. RV-positive samples (24/296) were detected in drinking-water samples from regions 2 and 3 during dry and transition seasons, with higher concentrations more frequently in the dry season. In addition, somatic coliphages were detected in samples from the three regions, with higher concentrations in region 2. Furthermore, a statistically significant relationship was found between somatic coliphages and diarrheal cases, classified as outbreaks or alerts in the region. Thus, the results confirmed that somatic coliphages are a good indicator of the presence of diarrhea cases in a specific region.
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