Kerala Battles Double Outbreak: Fever and Shigella Surge

Health authorities in Kerala have escalated surveillance and mosquito control measures following suspected fatalities linked to West Nile fever in the Ernakulam district. This alert coincides with a notable rise in Shigella infections, with more than 90 confirmed cases and several reported deaths recently. The state is experiencing a dual health threat from unrelated diseases: West Nile fever, a viral infection spread by mosquitoes, and Shigella, a bacterial intestinal illness transmitted through contaminated sources.

Public health officials have significantly ramped up mosquito eradication drives, sanitation initiatives, and disease monitoring. West Nile fever, though less common than dengue, can lead to severe neurological complications, especially in older adults and those with compromised immune systems. Residents are urged to eliminate stagnant water, ensure safe drinking water, practice frequent handwashing, and seek prompt medical attention if symptoms arise.

West Nile virus, first identified in 1937, is found globally and primarily infects birds, with mosquitoes acting as vectors to humans. Approximately 80% of human infections are asymptomatic, while about 20% develop mild flu-like symptoms. A small fraction, however, can experience severe neuroinvasive disease, including confusion, tremors, paralysis, and loss of consciousness, particularly at-risk individuals like the elderly or immunocompromised.

Currently, there is no specific antiviral treatment or human vaccine for West Nile virus. Management is supportive, focusing on hydration, rest, fever and pain management, and hospitalization for severe neurological complications. Preventing mosquito bites through repellents, protective clothing, and screens, alongside eliminating breeding sites, remains the most effective defense against West Nile fever and other mosquito-borne illnesses.