Out of the nine samples sent to Dibrugarh in Assam for verification of the suspected flu, the sample of a 39-year-old man tested positive for the H1N1 flu, state Nodal Officer, IDSP, Dr Tiasunep Pongerner said in a statement here.
The person who arrived in Nagaland from Delhi on February 21 is said to have developed symptoms of swine flu on February 22 after which his sample was sent the same day to Dibrugarh.
The health department has advised fellow passengers who have arrived in Nagaland from Delhi on the same flight to contact the nearest hospital if they would develop any symptoms of H1N1 flu.
On February 18, a Naga woman, based at Chennai, who arrived in the state was diagnosed with H1N1 virus after being admitted to the District Hospital Dimapur. The second case, a 27-year old Naga man was tested positive for the virus on February 20 and the third one was confirmed on February 21, he said.