(AP Photo/Kamran Jebreili)

Two B.C. oyster farms closed by norovirus

Officials report 40 cases of the illness in the past month after people had eaten raw oysters

Health officials in British Columbia have closed two oyster farms amid an investigation into another outbreak of norovirus linked to the consumption of raw oysters.

The BC Centre for Disease Control says there have been about 40 cases of the acute stomach upset since early March and all those who became ill reported eating raw oysters from B.C.

READ MORE: Tofino faces shellfish closures after norovirus outbreak hits 120

READ MORE: Ocean currents tied to B.C. norovirus outbreak: CDC

The centre says laboratory testing confirms the presence of norovirus in some of the cases and the illness is suspected in the rest of those who have become ill.

An exact source of the contamination has not been determined but the centre says human sewage in seawater is the most likely cause.

Nearly 350 cases of norovirus linked to raw or undercooked B.C. oysters were reported in B.C., Alberta and Ontario starting in late 2016 and continuing through early 2017, forcing the closure of 13 oyster farms on the B.C. coast.

That outbreak was declared over in April 2017, and an article published the British Columbia Medical Journal last June determined sewage spread by ocean currents caused the widespread contamination.

Researchers concluded the outbreak disproved claims that shellfish is safe to eat between September and April, and noted that bacteria, viruses and biotoxins persist in cold sea water year-round.

The centre says it does not recommend eating raw oysters and advises the shellfish should be cooked to an internal temperature of 90 C for 90 seconds to kill pathogens.

The Canadian Press

Like us on Facebook and follow us on Twitter.

Just Posted

Science fair draws best junior scientists from Vancouver Island to Victoria

200 young science enthusiasts share their inventions and discoveries at UVic

Vic. Symphony, Jeans ‘n Classics will rock you with the Best of Queen

Post-Bohemian Rhapsody, Pops Series concerts bring British band’s music back into spotlight

LOCAL FLAVOUR: Farm Whisperer tackles tough subject of farm succession

Linda Geggie is executive director with CR-FAIR

Young cyclist struck near Galloping Goose Trail

Minor injuries reported by police

New Coast Guard ship crashes into Ogden Point breakwater

‘It is fairly unprecedented that it would happen’

VIDEO: Keeping the hope alive, 28 years later

Annual Michael Dunahee Keep the Hope Alive run raised money for Child Find B.C.

Bobrovsky perfect as Blue Jackets blank Canucks 5-0

Vancouver shut out for 10th time this season

Fundraising campaign launched for man caught in SilverStar avalanche

In only two days, the GoFundMe surpassed its $15,000 goal

Victoria Mayor Lisa Helps says future assembly deliberations won’t be closed to public

Reversal comes after Saanich Coun. Judy Brownoff raised concerns

Terror at sea: Helicopter rescues frightened cruise passengers in Norway

The Viking Sky cruise ship was carrying 1,300 passengers and crew when it experienced engine trouble

Search and rescue team helicopters injured climber from B.C. provincial park

A 30-year-old woman suffered a suspected lower-limb fracture in Skaha Bluffs Provincial Park

DOJ: Trump campaign did not co-ordinate with Russia in 2016

Attorney General William Barr said special counsel “does not exonerate” Trump of obstructing justice

Most Read