Cambodia H5N1 Infection: 15th Case Announced This Year
Cambodia Reports 15th H5N1 Case This Year, Raising Concerns Over Rising Infections
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The ongoing spread of H5N1 avian influenza in Cambodia continues, with the country’s health ministry announcing a new confirmed human case today - the 15th of 2024. The case, involving a young child, underscores the persistent threat of this viral strain and highlights the risks associated with close contact with infected poultry.
Details of the Latest Case
The patient is a 6-year-old girl from Takeo province, located in southern Cambodia.According to a translation from Avian Flu Diary, an infectious disease news blog, the girl is currently hospitalized and exhibiting symptoms consistent with H5N1 infection, including fever, cough, and difficulty breathing. The National Institute of Public Health in Cambodia confirmed the diagnosis yesterday.
Investigations reveal a concerning pattern: a significant number of sick and dying chickens in the girl’s village over the past month. Specifically, nearly 1,000 chickens have become ill or died, including 30 at the child’s home. Tragically, the girl’s mother had reportedly prepared and cooked chickens that had died shortly before her daughter began to show symptoms. This direct link between exposure to infected poultry and illness is a recurring theme in recent Cambodian cases.
A Concerning Case-Fatality Rate
The situation is further complicated by a high case-fatality rate (CFR). Erik Karlsson, PhD, with the National Influenza Center and Pasteur Institute in Cambodia, reported via X (formerly Twitter) that 7 of the 15 confirmed H5N1 cases in Cambodia this year have been fatal, resulting in a CFR of 46.6%. Looking at the broader history, Cambodia has reported 87 H5N1 cases since 2005, with 50 deaths – a CFR of 57.5%. These figures emphasize the severity of the virus and the vulnerability of the population.
Nearly all recent Cambodian cases have been linked to contact with sick or dead poultry,and many have resulted in severe illness or death. Scientists have identified the circulating virus as a reassortant strain, a combination of an older H5N1 clade that has been present in Cambodia since 2014 and the newer, globally circulating clade 2.3.4.4b.
The emergence of this reassortant virus, coupled with an increase in human cases beginning in late 2023 and accelerating throughout the summer, is raising concerns among public health officials. Twelve cases have been reported in the last two months alone, suggesting a potential increase in transmission. The ongoing surveillance and examination of these cases are crucial to understanding the evolving dynamics of the virus and implementing effective prevention strategies.