In response to the recent Nipah virus cases within West Bengal, health authorities have begun the targeted testing of bats in the Zoological Garden in Alipore, south Kolkata to determine if the animals in question are carriers of the virus. It is believed that the National Institute of Medical Research (NIMR) began random reverse Transcription Polymerase Chain Reaction (RT-PCR) tests on bat samples that were collected in two consecutive mornings, officials announced.
A specially trained NIMR team visited the zoo on Thursday and Friday at dawn to draw blood and sample specimens from bats. They completed the work before visitors could enter the premises in the morning at 9:00 am. NIMR officials transported the blood samples to a designated laboratory for analysis using RT-PCR, which is an approach widely used to identify the genetic material of pathogens, such as Nipah virus.
The activity in the Alipore Zoo forms part of an overall surveillance plan by the health authorities of both national and state levels that aims at identifying and stopping possible source for Nipah infection. Recently bats from other regions of the state, such as Madhyamgram, Barasat and Basirhat in the North 24 Parganas district -were also subjected to sampling and tests as part of efforts to identify the prevalence of Nipah virus in the animal reservoirs.
Fruit bats are recognized internationally as a natural reservoir of the Nipah virus as a pathogen that is capable of crossing species boundaries to infect humans, and sometimes leading to severe illness. This is why monitoring wildlife is an essential element of public health initiatives designed to stop the spread of further human infections and understanding the nature of the Nipah virus in affected regions.
The RT-PCR test at Kolkata’s Alipore Zoo is being conducted in a collaboration framework that includes The National Institute of Virology (NIV) and the Indian Council of Medical Research (ICMR) as well as the West Bengal state health department. The forest department of the state will provide logistical support with the required permissions as well as oversight of Bat handling.
According to the Director of the Chief Conservator’s Office for Forests and the Chief Wildlife Warden Sandeep Sundriyal, formal consent from the forest department was required prior to any bat capture or sampling. The process was granted after an inquiry by the department of health. Sundriyal stressed the importance of adhering to the established procedures to reduce stress on animals and ensure the safety of the staff.
Zoo managers have also taken preventive measures to ensure that normal operations do not suffer. Although the sampling activities were performed at a time that was early morning entry into the zoo and visitor services were carried out according to plan after the sampling group left. Officials confirmed that there was there was no interruption to the public or zoo’s operation was experienced during the sampling test.
As health officials await the results of RT-PCR tests, officials warned that it could take several days before conclusive information is available regarding whether the bats examined on the premises of Alipore Zoo carry active Nipah virus. As long as laboratory confirmation is not confirmed scientists and experts in wildlife will continue monitoring in other districts that have significant bat populations, such as an upcoming sampling mission planned in the Nadia district.
The renewed emphasis on wildlife testing comes following the reports of confirmation for two Nipah virus cases in West Bengal earlier this month. The two affected people were identified as nurses. were identified in the Virus Research and Diagnostic Laboratory (VRDL) of the ICMR’s AIIMS branch located in Kalyani and are now receiving treatment in a private hospital.
The continuous testing of bats in the Alipore Zoo underscores the multifaceted public health intervention being carried out throughout the state. In addition to monitoring animals health authorities have increased the detection of human cases contacts tracing, as well as confinement actions in areas where infections have been detected. The authorities have also reaffirmed public guidelines on limiting the risk of exposure to wildlife vectors, and keeping high standards of hygiene.
State health department representatives stressed that, while the Nipah virus is a significant health risk, the testing initiative is a proactive surveillance initiative, not evidence of widespread transmission in the Zoo. The officials urged the public to stay updated through trusted channels and to follow the recommended precautions as investigation continues.
The research into bat populations as well as other possible vectors will be of utmost importance in the integrated strategy for managing and reducing Nipah virus dangers within West Bengal. Authorities have promised regular updates when new information is made available and when laboratory results are completed.
