Canadian government officials have addressed concerns regarding the safety of milk and milk products amidst reports of H5N1 bird flu detected in dairy cattle in the United States. As of May 14, enhanced testing on commercially sold milk in Canada has yielded reassuring results, with “no evidence” of the virus found in samples.
The detection of H5N1 in dairy cattle across nine U.S. states has prompted precautionary measures, including warnings to dairy workers, although the overall risk to the general population is deemed low. In response to the situation, Canadian inspectors have implemented stricter import requirements on U.S. breeding cattle. This decision follows the confirmation of the first case of H5N1 in a dairy herd in March and the identification of only the second human case in two years, involving a dairy farm worker in April. These incidents have raised concerns about the potential spread of the virus among animals and humans.
In a statement released on Tuesday, the Canadian government acknowledged the public’s concerns regarding the safety of milk and milk products. They reassured citizens by explaining that the testing method employed for detecting H5N1 is highly sensitive and capable of identifying even trace fragments of the virus, regardless of its infectivity.
The Canadian Food Inspection Agency (CFIA), in partnership with the Public Health Agency of Canada (PHAC) and Health Canada, is actively implementing proactive measures. These measures include enhanced testing of retail milk to identify viral fragments of Highly Pathogenic Avian Influenza (HPAI). CFIA laboratories are conducting tests on commercial milk samples sourced from various regions across Canada, utilizing a polymerase chain reaction (PCR) test. This testing method is highly sensitive, capable of detecting fragments of the virus, even if it’s non-infectious.
Negative test results indicate the absence of HPAI fragments in milk, aligning with current reports that Canadian dairy cows have not been found to carry the virus.
According to the Canadian Food Inspection Agency, laboratory tests conducted on 142 retail milk samples from various regions of Canada have shown no evidence of the disease. Similarly, the U.S. Food and Drug Administration has conducted tests on milk samples and confirmed the absence of live virus. However, the FDA cautioned against consuming unpasteurized raw milk, emphasizing the importance of pasteurization for eliminating potential pathogens.