Highly Virulent Avian Flu Virus H5N9 Detected in California, USA
For the first time in the United States, a highly virulent strain of avian flu, the H5N9 virus, has been detected in a duck farm in California. To control the outbreak, US health officials have ordered the culling of approximately 119,000 birds. Currently, the potential mutation of avian flu viruses remains the primary concern for researchers. Sometimes, these viruses can develop the ability to spread from person to person, as was the case with the 1918 Spanish flu and the 1957 Asian flu. To date, no individual has been identified as being infected with H5N9, although several avian flu viruses, such as H5N1, have already infected humans.
Infection is mainly due to direct contact with infected birds (whether alive or dead), inhalation of viral particles present in the environment (feathers, droppings, dust), or consumption of contaminated, undercooked food. It is essential to note that, to date, H5N1 has infected over 900 individuals worldwide, with a significant mortality rate (source: CDC, Centers for Disease Control and Prevention). Regarding the danger of a pandemic, experts estimate that the risk of human-to-human transmission of H5N9 is minimal, but they remain vigilant.
According to the CDC, no evidence of human-to-human transmission of this virus has been established, but they are closely monitoring its development. However, for personal safety, it is advised to avoid contact with sick or dead birds, wear masks and gloves when handling poultry, and cook poultry and eggs thoroughly before consumption. The detection of the highly pathogenic H5N9 virus in the United States serves as a warning to public health authorities. Although no human transmission has been observed to date, researchers are closely monitoring this virus to prevent a potential dangerous mutation.
