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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, Apr 24: The death toll due to the novel coronavirus rose to 723 with 37 fatalities reported since Thursday evening, while the number of cases saw a record jump of 1,752 to go up to 23,452 cases on Friday, according to the Union health ministry.

The previous highest single day increase was on April 20 when 1,540 cases were reported.

The number of active COVID-19 cases stood at 17,915 as 4,813 people were cured and discharged, and one patient migrated, the ministry said.

Thus, about 20.52 per cent of the cases have recovered so far, an official of the ministry said. 

The Indian Council of Medical Research (ICMR) said that 23,502 samples have been confirmed positive as on April 24 at 9 am.

The health ministry's figure of 23,452 cases include 77 foreign nationals.

A total of 37 deaths were reported since Thursday evening of which 14 fatalities were reported from Maharashtra, nine from Gujarat, three from Uttar Pradesh, two each from Andhra Pradesh, Delhi, Madhya Pradesh, Tamil Nadu and Telangana and one from Karnataka, the ministry's data stated.

Of the 723 deaths, Maharashtra tops the tally with 283 fatalities, followed by Gujarat at 112, Madhya Pradesh at 83, Delhi at 50, Andhra Pradesh at 29, Rajasthan at 27 and Telengana at 26.

The death toll reached 24 in Uttar Pradesh, 20 in Tamil Nadu while Karantaka has reported 18 deaths.

Punjab has registered 16 deaths while West Bengal has reported 15 fatalities.

The disease has claimed five lives in Jammu and Kashmir, while Kerala, Jharkhand and Haryana have recorded three COVID-19 deaths each.

Bihar has reported two deaths, while Meghalaya, Himachal Pradesh, Odisha and Assam have reported one fatality each, according to the ministry data.

However, a news agency tally of the figures reported by various states as on Friday showed 23,577 cases and 743 deaths in the country.

There has been a lag in the Union health ministry figures, compared to the number of deaths announced by different states, which officials attribute to procedural delays in assigning the cases to individual states.

According to the ministry's data updated in the evening, the highest number of confirmed cases in the country are from Maharashtra at 6,430 followed by Gujarat at 2,624, Delhi at 2,376, Rajasthan at 1,964, Madhya Pradesh at 1,852 and Tamil Nadu at 1,683.

The number of COVID-19 cases has gone up to 1,604 in Uttar Pradesh, 984  in Telangana and 955 in Andhra Pradesh. The number of cases has risen to 514 in West Bengal, 448 in Kerala, 463 in Karnataka, 427 in Jammu and Kashmir,  277 in Punjab and 272 in Haryana.

Bihar has reported 176 coronavirus cases, while Odisha has 90 cases. Fifty-five people have been infected with the virus in Jharkhand and 47 in Uttarakhand. Himachal Pradesh has 40 cases, Chhattisgarh and Assam have registered 36 infections each so far.

Chandigarh has 27 COVID-19 cases, Andaman and Nicobar Islands 22 while  18 cases have been reported from Ladakh.

Meghalaya has reported 12 cases, and Goa and Puducherry have seven COVID-19 cases each.

Manipur and Tripura have two cases each, while Mizoram and Arunachal Pradesh have reported a case each.

"Our figures are being reconciled with the ICMR," the ministry said on its website.

States wise distribution is subject to further verification and reconciliation, it said.