HDC staff testing for Bird Flu at Cornell University. Photo / AFP
HDC staff testing for Bird Flu at Cornell University. Photo / AFP
An elderly patient in Louisiana is in a “critical condition” with severe avian influenza, US authorities announced Wednesday, the first serious human case in the country as fears grow of a possible bird flu pandemic.
The new case brings the total number of infections in the United States during the current 2024 outbreak to 61, with other patients experiencing mild symptoms they recovered from at home.
The severity of the Louisiana case has heightened alarm, echoing similar cases worldwide. Last month, a teenager in Canada was also hospitalised with a severe case of bird flu.
According to the US Centers for Disease Control and Prevention (CDC), the Louisiana patient was exposed to sick and dead birds in backyard flocks.
“The patient is experiencing severe respiratory illness related to H5N1 infection and is currently hospitalised in critical condition,” the Louisiana health department said in a statement to AFP, adding the person has underlying medical conditions and is over the age of 65.
“Over the 20-plus years of global experience with this virus, H5 infection has previously been associated with severe illness in other countries, including illnesses that resulted in death in up to 50 per cent of cases,” Demetre Daskalakis, a senior CDC official told reporters on a call.
“The demonstrated potential for this virus to cause severe illness in people continues to highlight the importance of the joint ... US federal response,” he added.
The case was confirmed last Friday, according to the CDC. Genetic sequencing revealed that the H5N1 virus in the patient belonged to the D1.1 genotype.
This genotype has recently been detected in wild birds and poultry in the United States, and in human cases reported in Washington state and in the Canadian case, in British Columbia province.
The D1.1 genotype differs from the B3.13 genotype, which has been identified in dairy cows, some poultry outbreaks, and human cases with mild symptoms such as conjunctivitis.
A handful of US cases have had no known animal source of infection, including a case in Delaware, the CDC reported on Wednesday.
Health authorities, however, say there is still not enough evidence to suggest human-to-human transmission is occurring and that the overall risk to the general public remains low.
Still, concerns are mounting among scientists and public health experts that the cases being detected represent only a fraction of the true prevalence.
Meg Schaeffer, an epidemiologist at the US-based SAS Institute, told AFP recently there were now several factors suggesting that “avian flu is knocking on our door and could start a new pandemic any day”.
US cases have included a young child in California, reported last month.
The current US outbreak of the flu – technically the Highly Pathogenic Avian Influenza, or H5N1 bird flu – was first reported in March in dairy cows.
The rising frequency and diversity of mammalian infections in recent years have heightened concerns about the virus’s adaptability and its potential for cross-species transmission.
Cows from a non-suspect herd are milked at the Cornell Teaching Dairy Barn at Cornell University. Photo / AFP
Compounding these concerns is the possible role of raw milk as a vector for transmission.
The US Department of Agriculture issued a new federal order requiring that raw milk samples be shared on request from any dairy farm and milk transporter.
The order also mandates that any samples testing positive for bird flu be reported to federal authorities.
Uncertainty looms over how the incoming administration of President-elect Donald Trump will address the outbreak.
Trump’s pick for health secretary, vaccine sceptic and conspiracy theorist Robert F Kennedy jnr, is a known proponent of raw milk, raising questions about the administration’s stance on public health measures.
