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HLTH & WELFARE CANADA,HLTH PROTECTION BRANCH,MICROBIOL DIV,FOOD RES LABS,TUNNEYS PASTURE,OTTAWA K1A OL2,ONTARIO,CANADA HLTH & WELFARE CANADA,HLTH PROTECTION BRANCH,MICROBIOL DIV,FOOD RES LABS,TUNNEYS PASTURE,OTTAWA K1A OL2,ONTARIO,CANADA