Norovirus Called "The Most Common Cause" Of Food-Borne Illness Outbreaks By CDC
Norovirus is on the upswing in the United States, a new report by the Centers for Disease Control & Prevention (CDC) suggests.
No national surveillance system exists for Norovirus except where food-borne transmission is suspected. In last half of 2006, state public health departments began reporting more outbreaks involving acute gastroenteritis (AGE). Many of these involved residents of long-term care facilities.
Two years ago, in the (Aug. 24, 2007) Morbidity & Mortality Weekly Report (MMWR), CDC confirmed that “ a national increase has occurred in the frequency of AGE outbreaks caused by norovirus (including fatal cases in long-term--care facilities). Two new co-circulating GII.4 norovirus strains emerged nationwide in 2006 and likely accounted for this increase in activity.”
In today’s MMWR, CDC takes a more robust look at food-borne outbreaks in 2006 and finds Norovirus is “the most common cause.” In an analysis titled: “Surveillance for Foodborne Disease Outbreaks --- United States, 2006,” CDC breaks down the outbreaks for 2006 on which it has data.
“A total of 1,270 Food-Borne Disease Outbreaks (FBDOs) were reported, resulting in 27,634 (illness) cases and 11 deaths.
“Among the 624 FBDOs with a confirmed etiology, norovirus was the most common cause, accounting for 54 percent of outbreaks and 11,879 cases…” CDC reports.
In 621 outbreaks involving 18,111 cases, there was a single confirmed etiologic agent responsible. In 55 percent of those outbreaks (343) involving 66 percent of the cases (11,981), the cause was a virus. (Bacteria, parasites, and chemical agents caused the remainder.)
Calicivirus caused 337 (98 percent) of the confirmed FBDOs attributed to viruses; and all calicivirus outbreaks reported in 2006 were attributed to norovirus.

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comeback. Health experts fear the norovirus will once again hit hundreds of thousands of Brits.
because it might be contaminated with Norovirus.
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KALAMAZOO -- Health officials say it spreads easily from person to person, but it can be prevented.
Onatario, Canada - A source to SooNews.ca reported that a three year old girl from Dubreuilville died from the
Boston health officials reported today that their review of an ongoing outbreak of gastrointestinal illness at Hebrew Rehabilitation Center shows that 241 patients and 151 staff members have fallen ill since Feb. 21.
A stomach illness suspected to be the highly contagious norovirus has sickened at least 100 people who took part in a regional dance competition last weekend, health officials said Wednesday. Norovirus, also called the Norwalk virus, causes nausea, vomiting, diarrhea and stomach cramping, and can lead to more serious illnesses in the elderly and infirm. Billings suffered a community-wide outbreak last year, and several nursing homes were struck with the disease earlier this winter. "It's still early in our investigation. We don't know exactly what we're dealing with yet," said Barbara Schneeman, spokeswoman for the Yellowstone City-County Health Department. Schneeman said most of those reporting symptoms took part in or attended the Spotlight Dance Cup Regional Dance, held March 9-11 at the Billings Holiday Inn.
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BROOKSVILLE — A nasty outbreak of possible food poisoning hit at least 30 people and grounded several county staffers and government officials this past weekend after they attended a public workshop last Friday.
The University of St. Thomas Student Health Service reports many students with suspected norovirus infections.
Lettuce crops are see in Salinas, Calif. on Monday, Sept. 18, 2006. (AP Photo/Marcio Jose Sanchez, FILE) 