H5N1 Hits Kerala: Over 20,000 Birds to Be Culled as Bird Flu Spreads Fast

A fresh outbreak of bird flu (H5N1) in Kerala’s Alappuzha and Kozhikode districts has triggered urgent containment measures, with authorities ordering the culling of over 20,000 domestic birds . While such responses may appear drastic, they reflect the dangerous nature of highly pathogenic avian influenza (HPAI) a fast-spreading viral disease capable of wiping out entire poultry populations within days.

H5N1 belongs to the influenza A virus family , known for its ability to mutate rapidly and infect multiple organs in birds. Unlike milder strains, this variant causes systemic infection , attacking the respiratory, digestive, and nervous systems simultaneously. Infected birds often exhibit respiratory distress, swelling, neurological symptoms , and in many cases, die suddenly without clear warning signs. Mortality rates can reach up to 100% , making early detection and rapid response critical.

The virus spreads with alarming efficiency. It is transmitted through direct contact with infected birds , as well as exposure to contaminated droppings, water, feed, and equipment . Its ability to survive in cool and moist environments , particularly in wetlands, further accelerates transmission. Wild migratory birds act as natural carriers, often spreading the virus across regions without appearing visibly ill, thereby introducing infections into domestic poultry systems.

In regions like Kerala, where poultry farming includes both commercial and backyard systems, the risk multiplies. High-density farming enables rapid farm-to-farm transmission , while free-ranging birds increase interaction with wild carriers. Human activity through movement of workers, vehicles, and poultry products also contributes to the spread.

Despite its severity in birds, officials have clarified that the current outbreak is limited to avian populations , with no reported human infections. However, precautions remain essential. Handling infected birds without protection poses a risk, and consumption of raw or undercooked poultry products must be avoided. Experts emphasize that properly cooked poultry heated to 70°C or above is safe for consumption.