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The Survey of Pathogenic Microorganisms in Drinking water(2)

Absrtact	ABSTRACT The pathogenic microbials in drinking water, including Giardia, Cryptosporidium, Shigella, and Samonella, were investigated using conventional detection method. Water samples were taken from twelve prescreened locations around the Island. A total of forty-two water samples were obtained during 8 months. Among them there were six samples from raw water of the drinking water treatment plants, 6 from clean waters, and thirty from the small water units. Results revealed that, for the Giardia, one out of six raw and treated water samples respectively from water treatment plants, while two out of thirty small water units. Cryptosporidium was undetectable neither from the raw water samples, nor the clean waters. Only one sample from the small water units was detected with Cryptosporidium. For those positive response of Shigella and Samonella in pretests medium, the confirmatory test results showed negative response under the VITEK identification. However, if the water samples applied SBG medium following a molecular biological analytical method, Shigella can be detected in one sample from the small water units and five for the Samonella. For the tests of total plate counts and Total coliforms, the results indicated that the fail rate in clean waters was 16.7% and 0 %, respectively, and the fail rate for the small water units was 90 % and 76.6 %, respectively. The pathogenic microbials are important indicators to evaluate the drinking water quality. To ensure a better drinking water quality in Taiwan, it is of great urgent issue for the Taiwan Environmental Protection Administration (Taiwan EPA) to prevent potential waterborne outbreak caused by the pathogenic microbials. It is this purpose the Taiwan EPA funded this research with an ultimate aim to develop an innovative detection method, and a well-defined regulation so as to control the pathogenic microbials. Based on the findings indicated above, it is not suggested currently to the Taiwan EPA to e
Keyword	Cryptosporidium,Giardia,Shigella,Enterococcus,Aeromonas,Samonella

Absrtact

ABSTRACT The pathogenic microbials in drinking water, including Giardia, Cryptosporidium, Shigella, and Samonella, were investigated using conventional detection method. Water samples were taken from twelve prescreened locations around the Island. A total of forty-two water samples were obtained during 8 months. Among them there were six samples from raw water of the drinking water treatment plants, 6 from clean waters, and thirty from the small water units. Results revealed that, for the Giardia, one out of six raw and treated water samples respectively from water treatment plants, while two out of thirty small water units. Cryptosporidium was undetectable neither from the raw water samples, nor the clean waters. Only one sample from the small water units was detected with Cryptosporidium. For those positive response of Shigella and Samonella in pretests medium, the confirmatory test results showed negative response under the VITEK identification. However, if the water samples applied SBG medium following a molecular biological analytical method, Shigella can be detected in one sample from the small water units and five for the Samonella. For the tests of total plate counts and Total coliforms, the results indicated that the fail rate in clean waters was 16.7% and 0 %, respectively, and the fail rate for the small water units was 90 % and 76.6 %, respectively. The pathogenic microbials are important indicators to evaluate the drinking water quality. To ensure a better drinking water quality in Taiwan, it is of great urgent issue for the Taiwan Environmental Protection Administration (Taiwan EPA) to prevent potential waterborne outbreak caused by the pathogenic microbials. It is this purpose the Taiwan EPA funded this research with an ultimate aim to develop an innovative detection method, and a well-defined regulation so as to control the pathogenic microbials. Based on the findings indicated above, it is not suggested currently to the Taiwan EPA to e

Keyword

Cryptosporidium,Giardia,Shigella,Enterococcus,Aeromonas,Samonella