Nipah virus, Jan. 24 -- Amid concerns over a possible Nipah virus threat, bats at Kolkata's Alipore Zoo are undergoing RT-PCR testing to rule out infection, a senior official of the state Forest department said on Saturday.

A team from the National Institute of Medical Research collected blood and swab samples from the bats over two days-Thursday and Friday-and left the zoo after completing the testing process, news wire PTI reported, citing the official.

Earlier this month, two health workers at a private hospital at Barasat in North 24 Parganas district had tested positive for Nipah virus.

People can get infected with Nipah virus if they come in close contact with body fluids of an infected person, or via direct contact with infected...