"They have tested negative for the Nipah virus", the official said. Samples from dead bats were collected and sent to the National Institute of Virology for testing and all the samples were reported negative for the Nipah virus. Authorities have now chose to conduct more tests to locate its source.
The health department has also not restricted people from visiting Kerala, where the virus has so far killed 12 persons, following directions from the central surveillance unit of the integrated disease surveillance programme under the Union ministry of health and family affairs.
Two other patients were in isolation in neighbouring Karnataka state after developing symptoms similar to Nipah upon returning from Kerala.
In the wake of the sudden outbreak of Nipah virus in Kerala, the governments of Bihar, Himachal Pradesh, Sikkim and Puducherry on Saturday issued advisories urging the people to take adequate precautions and not go to high-risk areas to avoid the spread of the contagious disease.
According to the World Health Organization, the infection is a "newly emerging zoonosis that causes severe disease in both animals and humans", and is on the World Health Organization list of "Blueprint priority diseases".
Transmission of NiV takes place through direct contact with infected bats, pigs or from other NiV-infected people.
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The natural host of the virus is believed to be fruit bats of the Pteropodidae family, Pteropus genus. The treatment for human cases is supportive and management treatment along with intensive supportive care.
"The Mohap alerts the people travelling to Kerala to be aware of contracting the infection and advises them to postpone unnecessary travel till the situation is controlled", the Khaleej Times quoted a Ministry statement as saying on Thursday.
Meanwhile, CEPI today announced a collaboration with Profectus BioSciences and Emergent BioSolutions to develop and make a vaccine against Nipah virus, which is harbored in bats and can spread to humans and livestock.
Time reports that during its first outbreak in Malaysia almost 300 farmers became infected and more than 100 died.
After Lini's death, the hospital staff, especially nurses, were in a state of shock and they had been counselled by doctors of Kozhikode Medical College Hospital, the source told PTI.
Headache, dizziness, nausea, drowsiness, fever (lasts up-to four to five days) and confusion are some of the common signs and symptoms of the deadly disease.