Category Archives: Norovirus

China – Dozens of college students sickened with norovirus in Guangdong Province

Outbreak News Today


In Guangdong Province in southern China, hundreds of students at the Guangzhou Vocational and Technical University of Science and Technology have been stricken with symptoms including stomachache, diarrhea, vomiting and fever.

The university reported on Tuesday that 315 students suffered from symptoms including stomachache, diarrhea, vomiting and fever with 24 being preliminarily diagnosed as having contracting Norovirus as of  Tuesday morning.

An investigation reveals the sick students dined at various venues including seven canteens inside the campus and several restaurants outside the campus.

India – Suspected Norovirus infection for 52 students in St. Mary’s College, Thrissur

The Hindu

Norovirus infection has been suspected for 52 students in the hostel of St. Mary’s College, Thrissur. Health officials suspect that the infection must have spread through the food or drinking water distributed in the hostel.

RASFF Alert – Norovirus – Oysters


Norovirus in oysters in Netherlands and Belgium

India – Norovirus: Dakshina Kannada, Kodagu on high alert

The Hindu

In the wake of Norovirus cases being reported in 13 students of a veterinary college in Wayanad district of neighbouring Kerala, Karnataka has directed health officials in the border Dakshina Kannada and Kodagu districts to be on high alert.

In a circular issued on Tuesday, the State Joint Director (Communicable Diseases) has said people need to be vigilant about the contagious virus.

The Norovirus is a group of viruses that cause gastrointestinal illness. The virus causes inflammation of the lining of the stomach and intestines, as well as severe vomiting and diarrhoea, similar to cholera, the circular stated.

Scotland – Glasgow school closes after Norovirus outbreak.

Glasgow Live

Food Borne Illness - Norovirus -CDC Photo

A Glasgow West End school has been shut due to a suspected Norovirus related outbreak.

Kelbourne Park primary and nursery closed on Monday after an outbreak of sickness and diarrhoea with children and a ‘large number’ of staff infected.

It comes as Sunnyside Primary in Craigend was hit with a Covid outbreak this week – with half the kids off and 10 teachers affected. The council’s education boss said it can’t close as vulnerable families need support and extra staff have been brought it to help run it. The school has been deep cleaned and all children were asked to take a lateral flow test.

USA- Norovirus Among Likely Causes of Recent Reported Illnesses

Health WYO

Norovirus Food Safety kswfoodworld

Norovirus is likely among the reasons behind increased reports of recent illnesses in Wyoming, according to the Wyoming Department of Health (WDH).

People who are sick with norovirus may experience nausea, vomiting, watery diarrhea, stomach cramps, fatigue and dehydration. Other viruses and illnesses caused by bacteria contamination such as from E. coli can cause similar symptoms, but norovirus is the most common culprit.

Commonly described as “stomach flu” or “food poisoning,” norovirus is spread when people eat or drink contaminated food and beverages, touch contaminated surfaces or through close contact with someone already sick.

Matt Peterson, WDH surveillance epidemiologist, said contamination is almost always not obvious. “We’re often talking about extremely tiny amounts of poop or vomit. We can’t see it but it can make us very sick,” he said

“When people get ill this way, they most often blame the last thing they ate, but norovirus and bacterial illness can spread through many routes other than just eating food,” Peterson said.

Illness can hit quickly between 12 to 48 hours after a person has been exposed. Symptoms usually last from one to three days and go away without causing long-term problems.

“Norovirus and other illnesses with similar symptoms can be serious when people become dehydrated,” Peterson said. He noted those who become severely ill may need to call or visit a medical professional.  Infants, young children, immune-compromised persons, and persons unable to care for themselves, such as the disabled or elderly, are at higher risk for dehydration and may need hospitalization.

“We are specifically seeing increased reports of E.coli across the state recently compared to previous years, which can be particularly concerning in children under 5,” Peterson said. Parents with children who are suffering from stomach-related symptoms that do not improve after 72 hours, or if their child has bloody diarrhea, should seek medical care for the child because these could be signs of bacterial infection.

“Norovirus illnesses can be prevented,” Peterson said. “It sounds too simple, but, truly, good hand washing is critical. People can still be contagious and spread the virus for a few days after they no longer have symptoms.”

Recommended steps to help prevent illness include:

  • Frequently wash hands, especially after using the restroom or changing diapers, and before eating or preparing food.
  • If ill, stay home from work and school, especially if employed in food-handling, healthcare or child care.
  • Thoroughly clean and disinfect contaminated surfaces immediately after an episode of vomiting or diarrhea with a solution of 1 cup household bleach per 1 gallon of water and letting the solution sit for one minute. Always follow manufacturers’ safety precautions.
  • Immediately remove and wash contaminated clothing or linens after an episode of illness (use hot water and soap).
  • Flush or discard any vomit and/or poop in the toilet and keep the surrounding area clean.
  • Ill persons should take extra care to avoid spreading the virus by minimizing contact with other persons while ill and practicing good hygiene.



Research – How Safe to Eat Are Raw Bivalves? Host Pathogenic and Public Health Concern Microbes within Mussels, Oysters, and Clams in Greek Markets


Raw-bivalves consumption is a wide trend in Mediterranean countries. Despite the unambiguous nutritional value of seafood, raw consumption of bivalves may involve risks that could pose a significant threat to consumers’ health. Their filter-feeding behavior is responsible for the potential hosting of a wide variety of microorganisms, either pathogenic for the bivalves or public health threats. Under this prism, the current study was conducted in an effort to evaluate the risk of eating raw bivalves originating from the two biggest seafood markets in Thessaloniki, the largest production area of bivalves in Greece. Both microbiological and molecular methodologies were applied in order to assess the presence of various harmful microbes, including noroviruses, BonamiaMarteiliaEsherichia coliSalmonella, and Vibrio. Results indicated the presence of several Vibrio strains in the analyzed samples, of which the halophilic Vibrio harveyi was verified by 16S rRNA sequencing; other than this, no enteropathogenic Vibrio spp. was detected. Furthermore, although Esherichia coli was detected in several samples, it was mostly below the European Union (EU) legislation thresholds. Interestingly, the non-target Photobacterium damselae was also detected, which is associated with both wound infections in human and aquatic animals. Regarding host pathogenic microorganisms, apart from Vibrio harveyi, the protozoan parasite Marteilia refrigens was identified in oysters, highlighting the continuous infection of this bivalve in Greece. In conclusion, bivalves can be generally characterized as a safe-to-eat raw food, hosting more bivalve pathogenic microbes than those of public health concern.

Kerala – Kerala reports 13 cases of Norovirus

First Post

Kerala has been put on alert after at least 13 cases of norovirus have been recorded in Wayanad district.

The infection was reported in some 13 students of a veterinary college in Pookode near Vythiri in Wayanad district two weeks ago.

As State health minister Veena George asked people to be vigilant, here’s a look at what the virus is, its symptoms and what can be done to treat it.

UK – Porthilly Shellfish recalls oysters from Camel Estuary, Cornwall because of possible contamination with Norovirus



Porthilly Shellfish is recalling oysters from Camel Estuary, Cornwall as a precautionary measure because the oysters might be contaminated with norovirus. The products affected are limited to oysters from Camel Estuary, Cornwall, sold at retail stores listed below between 28 October and 09 November 2021.

Product details

Wadebridge Fishmongers
Product code 18, Polmorla Walk, Wadebridge, PL27 7NS
Passionate about Fish
Product code 61 Woodlands Rd, Camberley, GU15 3ND
Product code 17 Hartfield Rd, Forest Row, RH18 5DN
Rock Fish
Product code 1 Azime Court, Wadebridge, Cornwall, PL27 6NW

Risk statement

The possible presence of norovirus in the products listed above.

Symptoms caused by norovirus typically include sudden onset nausea, projectile vomiting, diarrhoea and fever but can also include abdominal pain and aching limbs. Norovirus can also lead to dehydration, especially in young children, older adults and people with weakened immunity.

Action taken by the company

Porthilly Shellfish are recalling the above products. Point of sale notices will be displayed in all retail stores that are selling these products. These notices explain to customers why the products are being recalled and tell them what to do if they have bought the product. Please see the attached notice.

Our advice to consumers

If you have bought any oysters from Camel Estuary, Cornwall, do not eat them. Instead, return them to the food business from where they were bought for a full refund. If you are unsure if the oysters purchased were from Camel Estuary, Cornwall, please contact the food business where they were purchased or contact Porthilly Shellfish on 01208 862624 for advice.

Denmark – Denmark aims to use education to reduce Norovirus risk when dining out

Food Safety News


The Danish Veterinary and Food Administration has launched a campaign to lower the risk of exposure to norovirus when dining out.

Ahead of Christmas, the Danish Veterinary and Food Administration (Fødevarestyrelsen) is focusing on how staff in professional kitchens, in cafés, canteens, restaurants and delicatessens can help to curb norovirus infections, which the agency said normally peak toward the end of the year.

Chefs and kitchen staff should stay home from work if they have symptoms of norovirus infection or have just had the disease. People can be infectious before feeling sick and at least 48 hours after having recovered.

Niels Ladefoged Nielsen, a consultant at the Danish Veterinary and Food Administration, said norovirus is extremely contagious, and there have been times when a single mistake in a professional kitchen has affected a large number of guests.

Nielsen said while the message of not cooking for others while feeling unwell is aimed at food professionals, it also applies to people at home in their own kitchen, and when preparing or serving food for family or friends.

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