Contamination of Pseudomonas aeruginosa in Bottled Mineral Water, Bottled Drinking Water, Vending Machine Water, and Dispenser Cold Water

Main Article Content

Karuna Teerasamit
Piyamas Jamsri
Bantoon Panichakul
Apichart Kaewchuenchai
Nuengrutai Kanjanaphun

Abstract

Background: Pseudomonas aeruginosa is an opportunistic pathogen that can cause an infection or diseases in the low immunity people. It can contaminate in drinking water. Currently, the standard of drinking water in Thailand does not specify the detection of P. aeruginosa.


Objectives: To studied a situation of Coliforms, E. coli, P. aeruginosa and an incident relationship between Coliforms and aeruginosa in drinking water.


Methods: This research studied the P. aeruginosa contamination in 4 types of drinking water that included: bottled mineral water, bottled drinking water, vending machine water, and dispenser cold water in Bangkok, metropolitan, and other areas. Also, it included an examination of coliforms and E. coli, which are an indicator of production hygiene and specific in drinking water standards. Furthermore, the research discovered a relation between coliforms and P. aeruginosa in drinking water. Total 91 drinking water samples were analysed in laboratory.


Results: The results showed that the bottled mineral water did not contain any pathogen, whereas the bottled drinking water, drinking water form vending machine for drinking water, and dispenser cold water contaminated coliforms and E. coli at 4.8, 14.3 and 15.8%, respectively, and contaminated P. aeruginosa by 19.1, 77.1 and 42.1%, respectively. Statistic test study showed that contamination of detection of coliforms and P. aeruginosa in drinking water was significantly related (p<0.05).


Conclusions: Drinking water that was not mineral water was contaminated with P. aeruginosa and the contamination related to Coliforms appearances. The low immunity people, infants, small children, elderly, or patients are able to infect P. aeruginosa easily from drinking water. As a result, the government agencies such as the Thai Food and Drug Administration should collect each drinking water types to monitor the surveillance on P. aeruginosa contamination in drinking water, as well as, the local authorities should launch requirements to control the services of vending machine water and mandate to dispenser cold water or vending machine water entrepreneurs take correctly maintenance the machines.

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Article Details

Section
Research Article
Author Biography

Karuna Teerasamit, Bureau of Quality and Safety of Food, Department of Medical Sciences

Bureau of Quality and Safety of Food, Department of Medical Sciences, Tiwanon Road, Mueang District, Nonthaburi, 11000, Thailand

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