Nipah scare: RT-PCR tests conducted on bats at Kolkata zoo

A team from the National Institute of Medical Research collected blood and swab samples from bats at the zoo for over two days and left soon after completing the process, a senior official of the State Forest Department said.

“The team collected swab samples from bats. They have followed all the protocols during the process,” Alipore Zoo Director Tripti Sah said.

According to a Forest Department official, sample collection at the zoo was carried out on Thursday (January 22, 2026) and Friday (January 23, 2026) and completed before the zoo gates were opened to visitors at 9 a.m.

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

Nipah virus is a notifiable disease, requiring immediate reporting to the Union government.

Incidentally, as part of efforts to trace the potential source of the Nipah virus, RT-PCR tests are being conducted on bats across various parts of West Bengal.

Samples have recently been collected from bat populations in Madhyamgram, Barasat and Basirhat. Alipore Zoo remains the only facility in Kolkata that houses a bat enclosure, prompting health authorities to include it in the surveillance drive.

The testing is being carried out jointly by the National Institute of Virology (NIV) and the Indian Council of Medical Research (ICMR) under the supervision of the Health Department, with logistical support from the Forest Department.

‘Due process followed’

West Bengal Chief Wildlife Warden Sandeep Sundriyal said the process was conducted following due procedure.

“Catching bats require prior permission from the Forest Department. The Health Department sought approval, which we granted,” Mr. Sundriyal said.

“Expert teams are visiting areas where bats are present across the State and collecting samples. The same process was followed at Alipore Zoo,” he said.

The officer added that precautionary measures were already in place at the zoo. The zoo authorities have taken advanced preventive steps. There is no reason for immediate panic,” he said.

Test results are expected in the coming days, a senior official of the Health Department said.

“Whether the bats at Alipore Zoo are completely safe will be known after the test reports arrive,” a Health Department source said.

Meanwhile, the expert team is scheduled to visit Nadia district on Saturday (January 24, 2026) to collect bat samples as part of the ongoing Statewide Nipah surveillance exercise.