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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.

Mumbai, Feb 9: Given the slow progress on the ongoing Rs 38,000-crore capacity expansion at the four largest metro airports, and also the surging traffic, the snaky queues will continue at least till 2023, warns a report.

The four largest airports -- New Delhi, Mumbai, Bengaluru and Hyderabad -- handle more than half of the traffic and are operating at 130 per cent of their installed capacity. These airports are under a record Rs 38,000-crore capex but the capacity will not come up before end-2023, says a Crisil report.

“With the dip in traffic growth largely behind, we expect congestion at the top four airports of New Delhi, Mumbai, Bengaluru and Hyderabad, which handle more than half of the load, to continue till about FY23,” says the report.

Already these airports are operating at over 130 percent of installed capacity, and the ongoing healthy traffic growth this operating rate is expected to rise further in the next 12 months.

“Operationalising of capacities in the following two fiscals will bring down utilisation levels albeit still high at over 90 per cent by fiscal 2023 and that is despite an unprecedented Rs 38,000 crore capex being undertaken by the operators of these airports over five fiscals 2020-24,” says the report.

Despite this unprecedented capex that is debt-funded, ratings are likely to be stable given the strong cash flows expected due to healthy traffic growth, low project risks associated with the capex and improving regulatory environment, notes the report.

“Capacity at these four airports will increase a cumulative 65 per cent to 228 million annually (from 138 million now) by fiscal 2023. However, traffic is expected to grow strong at up to 10 per cent per annum over the same period. Since additional capacities will become operational in phases only by fiscal 2023, high passenger growth will add to congestion till then,” warn the report.

High utilisation will ride on pent-up demand (accumulated in 2019 as traffic was impacted with the grounding of Jet Airways) and one-off issues with new aircraft of certain airlines.

Further impetus will also come from improving connectivity to lower-tier cities and reducing fare difference between air and rail. Increasing footfalls at airports provide a leg-up to non-aero streams such as advertising, rentals, food and beverage and parking, which comprise around half of the revenue of airports already.

These are expected to grow strongly at over 10-12 per cent, also supported by higher monetisation avenue coming along with current capex. The other half of revenue (aero revenue) is an entitlement approved by the regulator, providing a pre-determined, fixed return over the asset base and a pass-through of costs.

Aero revenue is also expected to get a bump up during fiscals 2022-24, when a new tariff order for airports is likely. Overall aggregate cash flows are likely to double by fiscal 2024 and provide a healthy cushion against servicing of debt contracted for capex, the report concludes.

New Delhi, Jun 23: The Delhi High Court Tuesday granted bail to Jamia student Safoora Zargar, who is pregnant and was arrested under anti-terror law UAPA in a case related to communal violence in northeast Delhi during protests against the Citizenship Amendment Act, as Solicitor General Tushar Mehta did not oppose it on humanitarian grounds.

At the outset of the hearing, Mehta, representing Delhi Police, submitted that Zargar can be released on regular bail on humanitarian grounds and the decision has not been taken on merits of the case and should not be made a precedent.

Justice Rajiv Shakdher, who conducted the hearing through video conferencing, released Zargar, who is 23-week pregnant, on bail on furnishing a personal bond of Rs 10,000 and surety of like amount.

The court said she shall not indulge in any activity for which she has been charged with and shall not hamper the investigation or influence the witnesses.