Norovirus cases are on the rise. Here’s what you need to know about this nasty bug

Norovirus, also known as the “winter vomiting bug,” is causing concern as cases continue to rise in Canada, the U.S., and the U.K. The highly contagious virus is responsible for 90% of all epidemic gastroenteritis outbreaks and is characterized by symptoms such as nausea, stomach pain, vomiting, and diarrhea. The University of Guelph recently experienced an outbreak of gastroenteritis, with over 150 individuals affected. While testing has not confirmed if norovirus is the cause, symptoms align with the virus.

Dr. Zain Chagla, an infectious disease specialist, attributes the increase in norovirus cases to the return to normal social patterns post-COVID-19. With people no longer practicing physical distancing measures, the virus is spreading more easily. Additionally, better testing capacity and a focus on diagnosis post-pandemic may contribute to the higher case counts being reported.

Norovirus spreads through the fecal-oral route, making daycares, preschools, and care homes common sites for outbreaks. The virus can survive on surfaces for extended periods, making proper cleaning and hygiene practices crucial in preventing its spread. Health Canada issued a recall for Taylor brand oysters due to concerns of norovirus contamination, highlighting the risk of foodborne transmission.

Treatment for norovirus typically involves letting the infection run its course while staying hydrated. Drinking water and electrolyte drinks are recommended, as well as avoiding caffeine, sugary drinks, and high-fat foods. Over-the-counter medications for nausea and diarrhea can help manage symptoms, but caution is advised when considering anti-diarrheal medications like Imodium.

To prevent the spread of norovirus, regular handwashing with soap and warm water is essential, as the virus is resistant to alcohol-based hand sanitizers. Cleaning high-touch surfaces with disinfectants effective against viruses like norovirus is also important in reducing the risk of infection.

While there are currently few treatments for norovirus, vaccine candidates from companies like Moderna and Vaxart show promise in providing protection against the virus. These developments offer hope for improved prevention strategies in the future. Stay informed and vigilant to protect yourself and others from the winter vomiting bug.