Dataset Information

Total coliforms as an indicator of human enterovirus presence in surface water across Tianjin city, China.

ABSTRACT:

Background

Enteric viruses in surface water pose considerable risk to morbidity in populations living around water catchments and promote outbreaks of waterborne diseases. However, due to poor understanding of the correlation between water quality and the presence of human enteric viruses, the failure to assess viral contamination through alternative viral indicators makes it difficult to control disease transmission.

Methods

We investigated the occurrence of Enteroviruses (EnVs), Rotaviruses (HRVs), Astroviruses (AstVs), Noroviruses GII (HuNoVs GII) and Adenoviruses (HAdVs) from Jinhe River over 4 years and analyzed their correlation with physicochemical and bacterial parameters in water samples.

Results

The findings showed that all target viruses were detected in water at frequencies of 91.7% for HAdVs, 81.3% for HuNoVs GII, 79.2% for EnVs and AstVs, and 70.8% for HRVs. These viruses had a seasonal pattern, which showed that EnVs were abundant in summer but rare in winter, while HAdVs, HRVs, AstVs, and HuNoVs GII exhibited opposite seasonal trends. Pearson correlation analysis showed that total coliforms (TC) was significantly positively correlated with EnVs concentrations while no consistent significant correlations were observed between bacterial indices and viruses that precipitate acute gastroenteritis.

Conclusions

Taken together, the findings provide insights into alternative viral indicators, suggesting that TC is a potentially promising candidate for assessment of EnVs contamination. However, it failed to predict the presence of HAdVs, HRVs, AstVs, and HuNoVs G?? in surface water across the city of Tianjin.

SUBMITTER: Miao J

PROVIDER: S-EPMC6211496 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature

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Publications

Total coliforms as an indicator of human enterovirus presence in surface water across Tianjin city, China.

Miao Jing J Guo Xuan X Liu Weili W Yang Dong D Shen Zhiqiang Z Qiu Zhigang Z Chen Xiang X Zhang Kunming K Hu Hui H Yin Jing J Yang Zhongwei Z Li Junwen J Jin Min M

BMC infectious diseases 20181101 1

<h4>Background</h4>Enteric viruses in surface water pose considerable risk to morbidity in populations living around water catchments and promote outbreaks of waterborne diseases. However, due to poor understanding of the correlation between water quality and the presence of human enteric viruses, the failure to assess viral contamination through alternative viral indicators makes it difficult to control disease transmission.<h4>Methods</h4>We investigated the occurrence of Enteroviruses (EnVs), ...[more]

PMID: 30382895

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Project description:BACKGROUND:Adequate supply of safe drinking-water remains a critical issue in most developing countries. The whole western region of Cameroon doesn't have a sustainable continuous water supply system, which leads most people to use potentially contaminated water sources to meet their daily water needs. Previous, studies carried out in similar areas of Cameroon have highlighted the poor bacteriological quality of water sources used as drinking-water by the local populations. METHODS:This study used the Micro Biological Survey method, a rapid colorimetric test for the quantitative detection of Coliforms in water samples. 22 water sources (12 improved and 10 unimproved) were identified; 1 water sample of 50?ml was collected in sterile plastic tubes, immediately kept in a refrigerator box and transported to the laboratory for analysis. 1?ml of each sample was inoculated in the Coliforms Micro Biological Survey (Coli MBS) vials initially rehydrated with 10?ml of sterile distilled water. The Coli MBS vials were closed, shaken for about 30?s for homogenization and then incubated at 37?°C. From the initial red color of the Coli MBS vials, changes in color of the reaction vials were monitored at three different time intervals (12?h, 19?h and 24?h), corresponding to three levels of contamination. RESULTS:The average distance (8.7?m) of the latrines from the nearest water source was less than the minimal recommended distance (15?m) to ovoid external contamination. The pH of water samples ranged from 5.5 to 8.3 and the maximum temperature found (26?°C) was almost at level favorable to outbreaks of waterborne diseases such as cholera. The presence of Total Coliforms was detected in 90.91% of the samples. 40% of samples were positive 12?h after the analysis beginning. High level of contamination was observed in unimproved water sources, 50% after 12?h corresponding to Total Coliforms concentration of 10?<?x?<?103?CFU/ml and the other samples after 19?h (Total Coliforms concentration: 1?<?x?<?10?CFU/ml). CONCLUSION:This study revealed the poor microbiological quality of water used by local populations of our study sites. There is need to conduct further qualitative microbiology studies to isolate potential germs involved in outcome of diarrheal diseases.

Dataset Information

Total coliforms as an indicator of human enterovirus presence in surface water across Tianjin city, China.

Background

Methods

Results

Conclusions

Publications

Total coliforms as an indicator of human enterovirus presence in surface water across Tianjin city, China.

Similar Datasets

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