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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.

Those owning a single house in joint names would continue to file their income tax returns (ITRs) in much simpler ITR-1 (Sahaj) and ITR-4 forms (Sugam) for assessment year 2020-21 with the government issuing a clarification in this regard.

The clarification has come days after the government modified the eligibility for filing the returns in ITR-1 and ITR-4, stating that those owning a property jointly, spending Rs 2 lakh on foreign travel and paying electricity bill of Rs 1 lakh in a year would not be able to file returns in the simpler forms.

They would have to file their returns with much more detailed information in other specified forms.

Following the changes in the eligibility for filing returns in the two forms, concerns were raised over it with taxpayers claiming that it will cause huge hardship for them.

"The matter has been examined and it has been decided to allow a person, who jointly owns a single house property, to file his/her return of income in ITR-1 or ITR-4 Form, as may be applicable, if he/she meets the other conditions," a Finance Ministry statement said.

"It has also been decided to allow a person, who is required to file return due to fulfilment of one or more conditions specified in the seventh proviso to section 139(1) of the Act, to file his/her return in ITR-1 Form," it added.

Tax practitioners welcomed the government’s move of going back to the previous position.

"This is a welcome clarification allowing middle class taxpayers owning a single house property to file simpler ITR forms, 1 and 4, and not the detailed ITR forms even if they own house property in joint names," said Shailesh Kumar, Director, Nangia Andersen Consulting.

It may be noted that taxpayers holding multiple house properties would have to file more detailed return forms.

In the major changes notified earlier this month by the Income-Tax department, individual taxpayers were disallowed to file return either in ITR-1 or ITR 4 if he or she was a joint-owner in house property.

In another change, those who deposited more than Rs 1 crore in bank account or spent Rs 2 lakh on foreign travel or paid Rs 1 lakh on electricity bill in a financial year were also barred from using the easy-to-fill return forms.

"By today's clarification, the government has maintained status quo. Now, the taxpayers can continue filing their returns in the same fashion in which they did last year," said Naveen Wadhwa, Deputy General Manager (DGM), Taxmann.