The samples of birds sent to the High Security Disease Laboratory (HSADL) in Bhopal from Tripura for test of Avian Influenza virus were today found negative.
The samples were sent from Dibyoday Krishi Bigyan Kendra, Khowai under West Tripura District.
Meanwhile, the samples from Vawmbuk village in Mizoram's Saiha District are under test at HSADL.
The Centre on Friday said that there were no suspected human cases of bird flu and the situation in Chingmeirong village in Manipur, where the outbreak of the bird flu was confirmed on July 25, was completely under control.
There were reports earlier that four people in the area who had come in contact with the infected birds were suffering from fever or Acute Respiratory Tract Infection (ARI).
The samples of those people sent for medical examination to National Institute of Virology in Pune and National Institute of Communicable Diseases in Delhi were also found negative for Avian Influenza virus.
Close to two lakh birds have been culled in the State, and the Centre has already alerted neighbouring Mizoram to check illegal smuggling of hens from across Myanmar where incidents of bird flu outbreak have occurred very often.