The World Health Organization (WHO) has confirmed that a four-year-old child in West Bengal, India, has contracted the H9N2 bird flu virus. The child, who had been exposed to poultry at home and in the vicinity, was admitted to a local hospital's pediatric intensive care unit in February with severe respiratory distress, high fever, and abdominal cramps. Following treatment, the child was discharged three months later.

According to the WHO, no other family members or contacts have exhibited respiratory symptoms. Information on the child's vaccination status and antiviral treatment was not available at the time of the report.

This incident marks the second recorded human infection with the H9N2 strain in India, the first being reported in 2019. Though the H9N2 strain typically causes mild illness, its prevalence in poultry means sporadic human cases are likely to continue, as warned by the WHO.

About the H9N2 Bird Flu Strain

H9N2 is a subtype of the avian influenza virus commonly found in birds, with humans occasionally being infected through direct contact with infected animals or contaminated environments.

Dr. Saibal Chakravorty, Senior Consultant of Internal Medicine at Metro Hospital in Noida, explains that common symptoms of H9N2 include fever, cough, sore throat, runny or stuffy nose, and headache. Muscle aches, fatigue, and conjunctivitis may also occur. Severe symptoms, such as difficulty breathing and pneumonia, can develop, particularly in individuals with weakened immune systems or underlying health conditions.

Compared to other avian influenza strains like H5N1 and H7N9, H9N2 is generally less infectious and causes milder illness in humans. However, regular monitoring is essential due to its widespread presence in poultry and potential to infect humans.

Treatment for H9N2 Bird Flu

Management and treatment of H9N2 bird flu involve various approaches. Antiviral medications like zanamivir (Relenza) and oseltamivir (Tamiflu) can be effective, particularly when administered early. Supportive care, including rest, adequate hydration, and treatment of fever and respiratory symptoms, is crucial. In severe cases, hospitalization may be necessary for intensive care and respiratory support.

Dr. Chakravorty emphasizes the importance of continuous surveillance and preventive measures due to H9N2's ability to spread and infect humans, especially those in close contact with birds.