United States: The health authorities of the United States have recently reported a cluster of human cases linked to bird flu, which could possibly result in the next big pandemic.
According to the reports by the US Centers for Disease Control and Prevention (CDC), the cluster is reported in two poultry farms in Colorado. As many as nine (9) people have caught infection and have experienced mild symptoms.
It is to be noted that all individuals have gotten infected through close contact with infected poultry, and the virus is not transmitted among humans.
CDC investigator Dr Cara Drehoff, who also leads the team, has mentioned, “The identification of these cases highlights the ongoing risk to persons who work in close contact with infected animals,” according to HealthDay News.
After reporting stats shared by the CDC, the total number of cases linked to bird flu among humans has reached up to 13 since April. Out of the total, nice cases are linked to the people working with poultry and four people working with dairy cattle.
Now, health experts have been considering bird flu as common among dairy herds.
In the past month, a new cluster of infections among poultry workers emerged within two egg-producing sites located in the same Colorado county.
“The Colorado Department of Public Health & Environment intervened in July 2024 at two poultry facilities where the HPAI A(H5N1) virus was detected,” Drehoff and her team reported.
The flocks affected were designated for eradication, and health officials conducted screenings for symptoms of bird flu among 663 workers engaged in this effort.
Out of these, 109 individuals (16.4%) reported symptoms and consented to undergo testing.
Nine workers (8.3%) were confirmed to have contracted the H5N1 avian influenza, according to the research team. The illnesses were categorized as “mild,” with six cases involving fever and chills, while conjunctivitis (“pink eye”) was the most prevalent symptom.
Crucially, no instances of human-to-human transmission of the avian flu were identified: “All [affected workers] had direct contact with infected or deceased poultry during [culling] and disposal operations,” stated the CDC team.
Scientists have long cautioned that a mutation enabling H5N1 avian influenza to transmit effortlessly between humans could potentially trigger a pandemic.
Healthcare professionals administered oseltamivir (Tamiflu) to those infected to mitigate their symptoms, as per the HealthDay News.
At one egg-production facility, adherence to personal protective equipment (PPE) protocols was low, prompting health authorities to supply the plant with goggles, gloves, and face masks to curb H5N1 transmission. Additionally, oseltamivir was distributed to all workers at the facility as a preventative measure.
In contrast, the second facility exhibited “high PPE compliance,” but when 44 workers involved in the poultry culling displayed symptoms indicative of possible infection, they, too, were provided oseltamivir as a precaution.
Moreover, considering that a majority of the workers at these sites were Spanish-speaking, Colorado health officials “visited both facilities to distribute bilingual information cards detailing avian influenza A virus symptoms in humans, guidance on where to seek medical care if symptoms arose, and specific information for healthcare providers regarding worker exposure to H5N1-infected poultry.”
This outbreak was swiftly contained and did not appear to pose a significant pandemic threat. Nonetheless, as sporadic cases of avian influenza in individuals closely working with animals continue to surface, an immediate and comprehensive response from healthcare workers is essential, emphasized by the CDC team.
US public health authorities must remain vigilant and prepared to swiftly investigate and respond to illness in agricultural workers, especially those with limited access to healthcare, Drehoff and her team concluded.