(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

House fire in View Royal sends one to hospital Saturday morning

View Royal Fire Rescue says fire is now out

Victoria property company plans to replace Saanich apartments with townhouses

Abstract Developments plans 26 townhouses for Gorge Road West

Camosun student starts bursary program for low-income students

The Jor-Dawn Smith Bursary will go to one Greater Victoria graduate in spring 2020

Curtain closes on Sidney’s Star Cinema location

The iconic theatre will move to a temporary location after its last showing Sunday

Heads up! A new take on A Christmas Carol comes to the Mac

Wonderheads tackle the beloved Dickens classic, Dec. 17-18 at Victoria’s McPherson Playhouse

VIDEO: Boys help rescue Cariboo bear cub

The cub, weighing just 24lbs, has been taken to wildlife sanctuary in Northwest B.C. for the winter

Greater Victoria 2019 holiday craft fair roundup

Get a jump on your holiday shopping

$578: that’s how much your first distracted driving ticket will cost with recent premium hikes

Over 50 per cent of Canadians admitted to using phone while driving last year, according to study

Kelowna man attempts to steal bait bike from RCMP parking lot

38-year-old Brian Richard Harbison is facing several charges

‘Things haven’t changed enough:’ Ecole Polytechnique anniversary prompts reflection

Fourteen women were fatally shot by a gunman at the Montreal school on Dec. 6, 1989

Bear raids freezer, gorges on Island family’s Christmas baking

Hungry bruin virtually ignored meat and fish, focused, instead, on the sweets

Second warning on romaine lettuce from California region as another E. coli case reported

Two cases of E. coli have been reported in relation to the illness in the U.S.

Residents in B.C. city could face 133% tax hike in ‘worst case’ lawsuit outcome: report

An average home could see a tax increase of $2,164 in one year

Most Read