Animal health officials must still find and kill domestic chickens in 70 villages before they complete the slaughter of all birds around India's first outbreak of H5N1. Officials killed all farm birds within a 10-kilometre (six miles) radius of Navapur town in western Maharashtra state by Wednesday.
But they still need to slaughter backyard birds in the 70 villages which should take one more week, said state animal husbandry commissioner Vijay Kumar.
Then officials will concentrate on full decontamination of the bird flu affected area, a step involving the removal of large quantities of bird droppings, burning of feathers and destruction of tonnes of feed.
"It's very, very difficult to deal with all the birds in one go," Kumar said. "All the people may not come forward. That's why we're making multiple efforts in some villages."
Teams of workers have killed over 270,000 birds at farms in and around Navapur and were starting to disinfect the area, while more than 70,000 chickens were killed in neighbouring Gujarat state.
Fourteen people are now under observation at a hospital in Navapur, the epicentre of India's first bird flu outbreak which was put under "quarantine" on Thursday with checkpoints on roads in and out of the town.
A total of 108 people had signs of fever, according to state figures for Navapur released Friday. But officials said they believed none were infected with H5N1.
Meanwhile, tests were being conducted on samples from a 12-year-old boy who died late Wednesday of a respiratory infection in Nasik, a district close to Navapur, the Indian Express newspaper reported.
"He was in close contact with poultry products and second his clinical symptoms were similar to those of avian influenza," Maharashtra state health secretary A.M. Khan told the newspaper.
Doctors quoted by the daily said they did not believe the samples would test positive for bird flu but had sent them in "to be sure."
No human cases of bird flu have been confirmed in the country and all but one of the first batch of 95 samples so far collected from residents of the Navapur area tested negative for avian influenza.
Tests on the single remaining sample were under way at the National Institute of Virology in western Pune city with results expected Saturday, officials said.
Trains passed through Navapur's station without stopping.
Officials urged only those who needed to make essential trips to travel to and from the town, discouraging people from attending events such as weddings.
Bus passengers were checked for signs of illness before they were allowed to cross checkpoints.
The full decontamination phase following the slaughter of all the chickens was expected to take up to 10 days, according to one official.
