Printer Friendly

Is contaminated groundwater an important cause of viral gastroenteritis? (Practical Stuff!).

* In a large number of the reported waterborne outbreaks, no etiological agent could be identified.

* It has been suggested that a significant fraction of these outbreaks may be caused by virus contamination of drinking water.

* The probability that viral outbreaks will be detected is low for groundwater systems.

* It is difficult to detect viruses either in infected humans or in drinking water near the time of an outbreak.

* There may be other reasons that waterborne virus outbreaks seem to be relatively uncommon:

-- Natural waters may inactivate the viruses.

-- The infectious dose for certain enteric viruses may be relatively high.

-- Disease-surveillance systems are relatively insensitive to increases in mild gastroenteritis.

* It is not known how many waterborne outbreaks go unrecognized and the extent to which viral outbreaks may be underestimated in the United States.

* Concerns about contamination of underground water supplies and human health risks have prompted a number of studies of virus occurrence in groundwater.

* The studies have in fact detected viruses in groundwater.

* Many of these studies selected high-risk or sewage-contaminated wells for testing, however.

* The results likely overestimated the occurrence of virus contamination in groundwater as well as the resulting public-health risks.

* Only limited evidence has been found for viral contamination of groundwater in the absence of bacterial indicators of sewage contamination.

* To better estimate the potential health risks, surveys should look at the occurrence of virus contamination in groundwater that does not have bacterial indicators of sewage contamination and in water that has not been adequately disinfected.

* These surveys should include groundwater from a wide range of geological conditions.
COPYRIGHT 2002 National Environmental Health Association
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 2002, Gale Group. All rights reserved. Gale Group is a Thomson Corporation Company.

Article Details
Printer friendly Cite/link Email Feedback
Publication:Journal of Environmental Health
Article Type:Brief Article
Geographic Code:1USA
Date:Oct 1, 2002
Words:262
Previous Article:NEHA's 2002 Annual Educational Conference and Exhibition Minneapolis, Minnesota. (Special Report).
Next Article:Fluoride overfeed at a well site near an elementary school in Michigan. (Practical Stuff!).
Topics:


Related Articles
Groundwater as a vehicle for disease transmission in Southeastern Idaho: a case study.
Groundwater Disaster in Puerto Rico - The Need for Environmental Education.
Norwalk-like viral gastroenteritis outbreak in U.S. Army trainees.
The Norwalk Virus: A Guidance Template for Local Environmental Health Professionals.
An outbreak of Norwalk-like viral gastroenteritis in a frequently penalized food service operation: A case for mandatory training of food handlers in...
Is contaminated groundwater an important cause of viral gastroenteritis in the United States? (Features).
Viral gastroenteritis outbreaks in Europe, 1995-2000. (Research).
Are noroviruses emerging?
Gastroenteritis outbreak in British troops, Iraq.
Fecal viral load and norovirus-associated gastroenteritis.

Terms of use | Privacy policy | Copyright © 2021 Farlex, Inc. | Feedback | For webmasters