LATEST HPC UPDATE from GUSTAV / Последние комментарии по теме HPC (общее микробное число)

December 17, 2013

Generally HPC/CFU measurements are used as “process indicators” to check the effects of water treatment processes and bacteriological quality within 12 hours after bottling. There is some debate on the potential negative impact to human health from the consumption of water with high HPC/CPU levels of bacteria. However, none of the studies, just a few of which are listed below, have identified any microbiological risk to human health in waters with a high number of HPC/CFU.

It is an established fact that natural mineral waters and spring waters contain certain natural flora which remain after bottling. To remain natural mineral waters, and to sustain the taste of these waters, they cannot be subject to disinfection after removal from the source. The levels of these naturally occuring flora can increase shortly after bottling, according to different studies, to values of 10x106. However, in the absence of E.Coli (absence of feacal contamination), the non-pathogenic bacteria that develop in pure water will develop freely without any risk for consumer. The following support this position:

1. WHO – World Health Organization
This Conference, with the participation of 175 experts from all over the world concluded that: “There is no evidence of health risk either from epidemiological studies or from correlation with occurrence of waterborne pathogens. Therefore HPC value cannot be used for setting a health target nor for justifying restriction to water consumption.”
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2. DWRF – Drinking Water Research Foundation

Major Findings and Significance: “There is insufficient clinical and epidemiological evidence to conclude that HPC bacteria in drinking water pose a health risk. For this reason, it is not possible to establish health-based standards for HPC bacteria in drinking water.”
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3. Latest Study Results

The Benefits of HPC Bacteria in POU/POE Devices—By Kelly A. Reynolds, MSPH, Ph.D. Conclusion: „The evidence is overwhelming that HPC bacteria don’t correlate with the occurrence of waterborne pathogens. Provided that the water adheres to the World Health Organization (WHO) guidelines for water quality, HPC increases resulting from growth in POU/POE devices don’t indicate a health risk to the consumer, and may in fact contribute to the overall reduction of harmful human pathogens found in drinking water.”
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4. FEMS – Microbiological Review

Microbiological safety of natural mineral water Henri Leclerc a;_, Annick Moreau b a Faculte„ de Me„decine de Lille et Institut Pasteur de Lille, 1 place de Verdun, 59045 Lille Cedex, France b Centre Expertise Eau/Danone, P.O. Box 87, 74500 Evian les Bains, France
Received 12 November 2001; received in revised form 6February 2002; accepted 8 February 2002
First published online 24 April 2002

“The above studies have not been capable of identifying any microbiological risk from examined bottled mineral water. To date, there has been no association between human disease and the natural bacteria found in natural mineral water.”
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5. Other Studies e.g. supported by European Union

“Finally, it is important to know whether the autochthonous bacteria are harmful to human health. Although this possibility cannot be ruled out by the applied methods, it is noteworthy that none of the identified bacteria was closely related to any known human pathogen.”
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6. ICBWA - Position Paper

"This natural harmless growth is the reason why the international regulations on packaged water as well as WHO guidelines for drinking water quality do not include any maximum limit for HPC in the sealed bottle at the time of purchase or in the drinking water distribution network.”
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