ALMOST every day, Jufri Harun makes his rounds of villages in the Telaga Biru subdistrict in Gorontalo regency in Sulawesi. He visits farmers in the villages to check on their cattle. Jufri then carefully looks for signs of illness in residents, such as vomiting or fever. "It could be anthrax if they show such symptoms. But sometimes it is hard to tell. We can only have definitive answers by taking blood samples to the lab," he said.

Jufri has been