California Child’s H5N1 Bird Flu Infection Linked to Raw Milk Consumption
Recent testing of samples taken from a child in California suspected to have contracted H5N1 bird flu after drinking raw milk has turned up no evidence of influenza viruses, according to the Centers for Disease Control and Prevention (CDC). The child, who presented to a Marin County emergency department with a fever and vomiting, initially tested positive for flu A, prompting further investigation.
The sample was sent to local and state laboratories to identify the virus as either one of the seasonal flu strains or H5N1, which has affected numerous dairy herds in the state. However, neither lab could confirm the positive result, leading to the sample being sent to the CDC for analysis. Ultimately, the CDC’s technicians were unable to identify any flu targets in the sample, indicating a negative result.
While this outcome does not definitively rule out the possibility of an H5N1 infection in the child, it does mean that the case will not be added to the list of confirmed human cases in the U.S. Despite the low amount of virus in the original sample, local health officials will classify the child as a suspected case.
Dr. Michael Osterholm, from the University of Minnesota’s Center for Infectious Disease Research and Policy, cautioned that similar situations may arise, especially with the onset of flu season and the popularity of raw milk consumption in certain California populations. Health professionals will need to obtain clear exposure histories from patients with flu-like symptoms to determine potential links to infected animals or raw milk consumption.
To date, the CDC has confirmed 58 human cases of H5N1 in seven states, mostly among workers on infected dairy farms or individuals involved in culling infected poultry. Several cases in California, Washington, and Arizona tested positive for H5, but the CDC was unable to confirm these infections due to sample quality issues.
The child in question had consumed raw milk from Raw Milk LLC, a company whose products were recently quarantined after testing positive for H5N1. It was revealed that the family was unaware the milk was unpasteurized when they purchased it. While H5N1-infected cow milk contains high levels of the virus, commercial pasteurization effectively eliminates it.
Despite the concerns surrounding raw milk consumption and H5N1 transmission, the child has since recovered, and family members tested negative for flu. Scientists continue to study the potential risks associated with consuming infected raw milk, based on evidence from affected animals.
The incident highlights the ongoing outbreak of H5N1 in dairy cows in California, with hundreds of herds testing positive for the virus since its detection in late August. As health officials remain vigilant, surveillance systems are being enhanced to detect potential cases early and prevent further spread of the virus.
