Three other Canadian cases have been confirmed in the current outbreak & # 39; E. coli associated with Roma lettuce, the Agency of Canada Public Health said Friday.
This brings the total number of & # 39; people who died in & # 39; this country for 22, including four & # 39; events in & # 39; Ontario, 17 in Quebec and one in & # 39; New Brunswick.
The agency said that m & # 39; there is no evidence that other parts of Canada affected.
The last place among diseases & # 39; October to early & # 39; November, Dr. Howard Njoo of the Agency of Canada Public Health, said in & # 39; & # 39 with telephone monitoring; journalists on Friday.
There are delays & # 39; between 14 and 29 days between someone who is sick and the agency is confirming that infection & # 39; E. coli O157 – the race that lies behind this outbreak, he said.
When patients begin to experience symptoms, which can include diarrhea and vomiting, can & # 39; take some time before seeking medical attention. Once they do this, the stool sample is sent to a laboratory to confirm whether infection & # 39; E. coli. If the test is positive, the local public health authorities are notified and that information is then delivered to the officials of the provincial and federal health.
The outbreak has left more than 30 people in the United States.
Roma lettuce contaminated with bacteria likely comes from California, said the head of the Food and Drug Administration (FDA) of the United States on Friday.
That conclusion is "based on model & # 39; growth and harvest," FDA Commissioner Dr. Scott Gottlieb tweeted.
"The goal now is to withdraw the product contained in & # 39; risk of being contaminated by the market, and then re & # 39; use the market," he said.
The Canadian Agency for Food Inspection said on Friday that although it incorporates information from the FDA in its investigation, could not confirm if Romain lettuce to make the sick Canadians has grown in & # 39; California.
UPDATE ON Outbreak: The romaine implicated in the current outbreak x & # 39; likely from California-based models & # 39; growth and harvest. The aim now is to withdraw the product contained in & # 39; risk of being contaminated by the market, and then re & # 39; use the market …..
Gottlieb said the FDA wants to "help the unaffected producers to re-engage in production", noting that Roma felt soon be harvested from other regions are growing in the United States, including Florida and Arizona.
The agency must also make more specific product labeling "the new standard" to help food tracing back to the source, he said. The FDA was "working with producers and distributors on the labeling of the products to the place and date of harvest and possibly other ways & # 39; information to consumers."
The labeling has proven challenging in the investigation of food contamination, Matthew Wise, deputy head of the branch for response & # 39; outbreak in the US Centers for Control and Prevention of Disease, told CBC News on Friday.
"One of the things you do not see on the packaging is where grown leafy green product," said Wise. "Often those bags are set to & # 39; … the location of the corporate headquarters of the company or something like that.
He said it "almost impossible" for someone looking to bag & # 39; felt to know if, for example, has grown in & # 39; Arc, California, Florida or Texas.
Another challenge in tracking & # 39; E. coli particular product in & # 39; this outbreak, Wise said, is the fact that lettuce has a short shelf.
"One of the types & # 39; evidence we rely on … is to test a food that we think are causing the outbreak and see if we can find that the specific outbreak of food", said . "By the time we know that part of & # 39; & # 39 outbreak, and we we return someone, say, who ate at the restaurant … they're not serving the same felt they were serving three weeks ago. "
Even when investigators can trace contamination & # 39; E. coli back in & # 39; particular region, it is still difficult to reduce the precise source of the bacteria. Can & # 39; to water used to jirriga area & # 39; particular farmer or x & # 39; nowhere in transport, f & # 39; of & # 39; distribution center, or in & # 39; shop.
At the outbreak of & # 39; the same strain & # 39; bacteria in & # 39; leafy greens – including Roman razor – the last year, Canadian officers and a & # 39; the United States could not indicate where the problem was located.
"This is a chain & # 39; complicated distribution. It is a hard product to investigate," said Wise.
S & # 39; Are people should do
The of the Canada Public Health Agency continues to encourage people in & # 39; Ontario, Quebec and New Brunswick not to buy or eat Romani felt or mixtures & # 39; salad which Roma felt.
If people in & # 39; those provinces have Romaine at home, and are launching it clean and suppress container containing, including bins in the refrigerator.
The agency also advises anyone experiencing vomiting or diarrhea who ate the Roma felt to see the care provider of their health.