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New Delhi, Apr 15: As the world grapples with coronavirus, researchers have found the presence of a different kind of coronavirus -- bat coronavirus (BtCoV) --in two bat species from Kerala, Himachal Pradesh, Puducherry and Tamil Nadu, according to a study by the Indian Council of Medical Research (ICMR).

There is no evidence or research to claim that these bat coronaviruses can cause disease in humans, said Dr Pragya D Yadav, Scientist at the National Institute of Virology (NIV), Pune and also the first author of study.

The study has been published in the Indian Journal of Medical Research,

Twenty-five bats of Rousettus and Pteropus species from Kerala, Himachal Pradesh, Puducherry and Tamil Nadu were found positive for BtCoV in Kerala, Himachal Pradesh, Puducherry and Tamil Nadu.

"These bat coronaviruses have no relation with SARS-CoV2 responsible for the COVID-19 pandemic," Yadav said, adding that Pteropus bat species were earlier found positive for Nipah virus in 2018 and 2019 in Kerala.

"Bats are considered to be the natural reservoir for many viruses, of which some are potential human pathogens. In India, an association of Pteropus medius bats with the Nipah virus was reported in the past. It is suspected that the recently emerged severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) also has its association with bats," the objective of the study titled 'Detection of coronaviruses in Pteropus and Rousettus species of bats from different states of India' stated.

"In the present scenario of changing demography and ecological manipulations, it is challenging to have checks on the encounters of bats with other animals and humans," the study stated, highlighting that the need for active and continuous surveillance remains crucial for outbreak alerts for bat-associated viral agents with epidemic potential, which would be helpful in timely interventions.

"Although CoVs in the subfamily coronavirinae do not usually produce clinical symptoms in their natural hosts (bats), accidental transmission of these viruses to humans and other animals may result in respiratory, enteric, hepatic or neurologic diseases of variable severity. It is still not understood as to why only certain CoVs can infect people," the study said.

The scientists stressed on the need of proactive surveillance of zoonotic infections in bats.

The detection and identification of such viruses from bats also recommends cross-sectional antibody surveys (human and domestic animals) in localities where the viruses have been detected.

Similarly, if the epidemiological situation demands, evidence-based surveillance should also be conducted, the study said while emphasing on the need of developing strong mechanisms for working jointly with various stakeholders such as wildlife, poultry, animal husbandry and human health departments.

"In conclusion, our study showed detection of bat CoVs in two species of Indian bats. Continuous active surveillance is required to identify the emerging novel viruses with epidemic potential," Dr Yadav said.

Elaborating on the study, Dr Yadav said throat and rectal swab samples of two bat species -- Rousettus and Pteropus -- from seven states were screened for the bat coronvirus during which the representative samples collected from Kerala, Himachal Pradesh, Puducherry and Tamil Nadu tested positive while those from Karnataka, Chandigarh, Punjab, Telengana, Gujarat and Odisha came out negative.

The reverse-transcription polymerase chain reaction (RT-PCR) tests and sequencing were used for the confirmation of the findings.

"This is an ongoing study to understand the prevalence of the Nipah virus in bats," she said.

New Delhi, Jul 24: The Delhi High Court on Friday asked the ICMR to come out with a clarification that mobile number, government-issued identity card, photographs or even a residential proof ought not to be insisted upon for Covid-19 test of mentally ill homeless persons.

According to an Indian Council of Medical Research (ICMR) advisory of June 19, every person who was to be tested for Covid-19 has to provide a government-issued identity proof and should have a valid phone number for tracing and tracking the individual and his/her contacts.

A bench of Chief Justice D N Patel and Justice Prateek Jalan said that ICMR should issue a clarification by way of a circular or an official order that the identity proof, address proof and mobile number are not required for testing mentally ill homeless persons.

The high court said a camp can be organised for testing such persons as is being done across Delhi for others.

"Guidelines have to be given by you (ICMR). You put it in black and white for the states'' benefit. You only need to clarify in two-three lines that mobile number, address proof and identity cards are not required for testing mentally ill homeless persons," it said.

"Use your powers for the public at large. Once you do so (issue the clarification), all states will comply," the bench added.

Additional Solicitor General Chetan Sharma, appearing for ICMR, sought time to take instructions from the government regarding the observations made by the bench.

The high court, thereafter, listed the matter for further hearing on August 7.

The bench was hearing a PIL moved by advocate Gaurav Kumar Bansal seeking directions to ICMR and Delhi government to issue guidelines for Covid-19 testing of mentally ill homeless persons in the national capital.

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The high court on July 9 had asked the ICMR to consider the plight of the mentally ill homeless persons and see whether they can be tested without insisting upon a mobile number, government issue identity card and residential address proof.

The bench had said to ICMR that many homeless mentally ill persons are institutionalised or in shelter homes and therefore, traceable, so there was no need for their identity proof or phone numbers to test them for Covid-19.

In response to the court''s query, ICMR has filed an affidavit stating that the purpose behind the submission of government identity card and telephone number was to ensure proper tracking and treatment of positive cases and their contacts as ''Test/Track/Treat'' is the best strategy for control of Covid-19 pandemic. 

It further said that since health was a state subject, the concerned state health authority may consider adopting a suitable protocol to ensure that the strategy of ''Test/Track/Treat'' is followed and the grievance raised in the PIL is also addressed.

ICMR, in its affidavit, has said that it has only advised facilitating contact tracing as well as tracking of the Covid-19 infected patients.

"The modalities regarding the contact tracing as well as tracking of the Covid-19 infected patients completely falls under the domain of IDSP. NCDC and state health authorities. 

"ICMR is a research organization and the contact tracing, as well as tracking of the Covid-19 infected patients, is not under the domain of ICMR," it has said in its affidavit.

Bansal has claimed in his petition that the Delhi government has not taken seriously the lack of guidelines with respect to Covid-19 testing of mentally ill homeless persons.

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He has said the high court had on June 9 directed it to address the grievances raised by him in another PIL with regard to mentally ill homeless persons in accordance with law, rules, regulations and government policy.

He said that on June 13 he also sent a representation to the Chief Secretary of Delhi government for providing treatment to mentally ill homeless persons in the national capital who have no residence proof. 

However, nothing was done by the Delhi government, he had told the court.