Navigation Links
Norovirus found to cause traveler's diarrhea

A majority of traveler's diarrhea cases among U.S. travelers to Mexico and Guatemala were attributed to Norovirus, a common cause of nonbacterial gastroenteritis outbreaks usually associated with developed countries, according to a new study by researchers at the Johns Hopkins Bloomberg School of Public Health and other institutions. The researchers also found that the longer travelers stayed at their destination, the more likely they were to contract Norovirus infections. The study is published in the March 2005 issue of the Journal of Clinical Microbiology.

"Noroviruses are known to be a major cause of food and waterborne gastroenteritis outbreaks in domestic and unique settings, such as cruise ships, and also have been documented among military groups during deployment overseas. However, few studies have investigated the prevalence of Norovirus infection among civilians traveling from industrialized to developing countries," said Kellogg J. Schwab, PhD, corresponding author of the study and an assistant professor in the Department of Environmental Health Sciences at the Johns Hopkins Bloomberg School of Public Health.

He explained that Noroviruses often are not considered in studies of traveler's diarrhea because, until recently, molecular detection methods for these viruses have not been readily available in laboratories in the United States or other countries.

The researchers examined stool samples from 34 individuals who experienced traveler's diarrhea during trips to Antigua, Guatemala or Cuernavaca, Mexico, for Noroviruses, as well as for bacterial and protozoan pathogens. Sixty-five percent of the individuals in the study had at least one stool sample positive for Norovirus. Although Norovirus previously has been implicated as a cause of traveler's diarrhea among visitors to Mexico, this is the first study to indicate that Norovirus contributes to traveler's diarrhea in visitors to Guatemala.

Amy R. Chapin, first author of the study and a PhD-candidate in the Department of Environmental Health Sciences at the Johns Hopkins Bloomberg School of Public Health, noted that 11 Norovirus-positive stool samples also were positive for E. coli, a leading bacterial cause of traveler's diarrhea, thus indicating that dual infections among individuals experiencing traveler's diarrhea may be more common than previously thought.

The authors said that further research into the role of Noroviruses in traveler's diarrhea is warranted. The simple, inexpensive molecular diagnostic techniques used in this study to identify Norovirus-positive stool samples could serve to facilitate future Norovirus-related research in developing countries.

"Prevalence of Norovirus among U.S. Visitors to Mexico and Guatemala Experiencing Traveler's Diarrhea" was supported by a grant from the Center for a Livable Future at the Johns Hopkins Bloomberg School of Public Health. Amy R. Chapin was also supported by a Howard Hughes Medical Institute Pre-doctoral Fellowship in Biological Sciences.

Co-authors of the study were Colleen M. Carpenter, William C. Dudley, Lucy C. Gibson, Rafael Pratdesaba, Olga Torres, Domingo Sanchez, Jaime Belkind-Gerson, Irene Nyquist, Anders Karnell, Bjorn Gustafsson, Jane L. Halpern and A. Louis Bourgeois.


'"/>

Source:Johns Hopkins University Bloomberg School of Public Health


Related biology news :

1. Norovirus, AIDS vaccine and Hepatitis Virus
2. New component of the brakes on nerve regeneration found
3. Strongest proof yet found for prion hypothesis
4. A puzzle piece found in unraveling the wiring of the brain
5. New World founders small in number
6. Pair of cancer genes found to drive both cell migration and division
7. Alien woodwasp, threat to US pine trees, found in N.Y.
8. Achilles heel of the herpes virus possibly found
9. Purdue scientists may have found key to halting spinal cord damage
10. Unexpected lock and key mechanism found for the assembly of tumor blood vessels
11. New protein vital for immune response is found in surprise location
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:12/22/2016)... SuperCom (NASDAQ:   SPCB ... e-Government, Public Safety, HealthCare, and Finance sectors announced today that Leaders ... to implement and deploy a community-based supportive services program to reduce ... , further expanding its presence in the state. ... This new program, which is expected ...
(Date:12/16/2016)... 16, 2016 Research and Markets has announced ... Global Forecast to 2021" report to their offering. ... The biometric vehicle access ... a CAGR of 14.06% from 2016 to 2021. The market is ... to reach 854.8 Million by 2021. The growth of the biometric ...
(Date:12/15/2016)... , Dec. 15, 2016 Advancements ... experience, health wellness and wellbeing (HWW), and ... in three new passenger vehicles begin to ... gesture recognition, heart beat monitoring, brain wave ... facial monitoring, and pulse detection. These will ...
Breaking Biology News(10 mins):
(Date:1/17/2017)... , Jan. 17, 2017   Pulmatrix, Inc . ... company developing innovative inhaled therapies to address serious pulmonary ... fungal infections in the lungs of CF patients, PUR1900, ... (QIDP) by the U.S. Food & Drug Administration. ... designed to speed the development of novel drugs against ...
(Date:1/17/2017)... , Jan. 17, 2017  Only nine percent of ... over profits, while only 16 percent believe health insurance ... today. Meanwhile, 36 percent of U.S. adults believe health ... over profits, compared to hospitals (23%). "We ... said Wendy Salomon , vice president of reputation ...
(Date:1/17/2017)... Jose, CA (PRWEB) , ... January 17, 2017 , ... ... cultivate a balanced, peaceful and healthy lifestyle, announced today the official launch of its ... and frees the mind. , In development for over a year, the ...
(Date:1/17/2017)... ... January 17, 2017 , ... Diagenode, a ... announced a collaboration with the Heidelberg University Hospital and the German Cancer Research ... following the company’s successful launch of its CATS (Capture and Amplification by ...
Breaking Biology Technology: