Vijayan, 56, a marginal farmer, was admitted to the Sulthan Bathery taluk hospital, Wayanad on April 18 with complicated symptoms of KFD.
The very next day he was referred to a private medical college. There, he was admitted into the intensive care unit after he was confirmed KFD positive.
The farmer's relatives said the carcass of a monkey was found on their plantation nearly a month ago, and Vijayan buried the carcass on the land. Later, he was vaccinated against the disease. However, Dr. Sasidharan said the vaccination would take a minimum of six months to take effect.
KFD is a tick-borne viral hemorrhagic fever endemic to South Asia. The disease is caused by a virus belonging to Flaviviridae, a family of viruses that are primarily spread through arthropod vectors.