The result of the blood samples, taken from the people of Nandurbar district, is yet to confirm whether the H5N1 strain of avian influenza virus had spread to humans, even as the culling of thousands of birds goes on unhindered.

Officials said the massive culling exercise in the region that reported India's first case of the global disease was likely to be completed by early Thursday.

India's first confirmed case of the H5N1 strain of avian influenza was reported Saturday from Navapur village in Nandurbar district, some 300 km from here, after tests were conducted on thousands of dead chicken.

Authorities say they have not come across any case of human avian influenza in the country.

"We had sent over 100 blood samples from the suspected people in the Nandurbar district in the last couple of days. The results are expected soon," said a health department official on telephone from Navapur.

"Once we get the test results, we will decide the next course of action. As of now there is no confirmed case of human avian influenza anywhere in Maharashtra," said the official.

The official said a total of 12 people have been kept under medical observation in Nandurbar hospitals after they reported flu-like symptoms. The door-to-door survey in the affected region had also been intensified.

The culling of birds is continuing in Nandurbar, with the authorities extending the area marked for the exercise as a "precautionary