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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.

India has jumped past 4.5 lakh coronavirus cases and 14,476 people have succumbed to the viral infection so far. In this backdrop, speaking to IANS in an exclusive interview, AIIMS Director Randeep Guleria said India is also vulnerable to second wave of coronavirus and people should continue to follow social distancing, wearing mask and other precautions, after cases begin to decline.

He added that in order to contain the outbreak of Covid-19, a limited lockdown in hotspots, where volume of cases is very high, may be considered along with a micro-plan to prevent leakage of cases from these areas to other non-containment areas. Excerpts of the interview are below:

Q: Reports say China and South Korea are witnessing a second wave of coronavirus infection, what is this second wave, is India also vulnerable to this?

A: When cases come down significantly, people tend to drop their guard against the viral infection, and this leads to the second wave (which means a sudden increase in the number of cases). After cases begin to decline, people should continue to follow the precautions -- continue to maintain social distancing and wear masks regularly. See what happened in Singapore, it was struck by a second wave of coronavirus. Look, what happened in the 1918 pandemic, people dropped their guard and the second wave of viral infection struck back. If people do not follow social distancing then the spike in cases is apparent. We need to take these precautions at least for one year. India is also vulnerable to this second wave.

Q: If Covid-19 cases continue to rise rapidly, do you think we need another lockdown in areas where volume of cases are very high?

A: A large volume of cases is concentrated in specific areas like hotspots, and in order to maintain things in order, we may need a limited lockdown in these areas. This should be followed by a micro-plan which entails extensive testing of people and also extensive contact tracing of people who have got in touch with positive people. Need to ensure there is no leakage of cases from these areas. People from these areas should not mix with others in non-containment areas. This will aid in containing the outbreak of the virus. People who have developed symptoms should get themselves tested, especially in the containment areas.

Q: With more than 4.5 lakh cases and close to 14,500 deaths, do you think India has reached its peak and a decline in cases is prominent?

A: The cases will continue to increase for some time. The doubling time of cases has also increased. But, the cases will also begin to flatten. Though, it is difficult to give an exact time period in this viral infection, it seems, the growth in cases will flatten in the end of July or beginning of August. A decline will come to this viral infection, but it does not mean that people should drop their guard. As a measure, we need to decrease community participation and citizens should continue to follow social distancing. People should get themselves tested. All these efforts will help in preventing people from contracting this virus. These precautions will also prevent us from the second wave, and we must continue to take precautions. The virus has not gone away, it is still lurking.

Q: India has crossed the 4.5 lakh coronavirus cases so far, although our recovery rate is good, but still 10,000 to 15,000 cases are reported daily. Why do cases continue to spiral, what is the reason?

A: We have to remember a few things -- the bulk of cases are in 10 cities, nearly 70 per cent, and if we take into account cases per million population, the number is not very high, as compared with countries including countries in Europe. Many European countries put together still do not add up to the Indian population. Do not compare India to countries like Italy, Spain etc. We need to focus on hotspots, which contribute to between 70 -80 per cent of cases, and we have to identify cases in these areas at an early stage. The population density is very high in these cities. People in lower socio-economic status are highly vulnerable to the viral infection, as many live together in small spaces and there is a lot of mixing of people happening there. Look at the market places, people are not following social distancing and not wearing masks. In fact, many are in close vicinity of each other.

Jun 8: Petrol and diesel prices were hiked by 60 paisa per litre on Monday, for the second day in a row, as state-owned oil firms reverted to daily price revisions after a 83-day hiatus.

Petrol price in Delhi was hiked to Rs 72.46 per litre from Rs 71.86 on Sunday, while diesel rates were increased to Rs 70.59 a litre from Rs 69.99, according to a price notification of state oil marketing companies.

This is the second daily increase in rates in a row. Oil companies had on Sunday raised prices by 60 paisa per litre on both petrol and diesel after ending a 83-day hiatus in daily rate revision.

Daily price revision has restarted, an oil company official said.

While oil PSUs have regularly revised ATF and LPG prices, they had since March 16 kept petrol and diesel prices on hold, ostensibly on account of extreme volatility in the international oil markets.

Auto fuel prices were frozen soon after the government raised excise duty on petrol and diesel by Rs 3 per litre each to mop up gains arising from falling international rates.

The government on May 6 again raised excise duties by Rs 10 per litre on petrol and Rs 13 per litre on diesel.

Oil companies, instead of passing on the excise hike to consumers, decided to adjust them against the reduction required because of the drop in international oil prices. They used the same tool and did not pass on the Re 1 per litre hike required for switching over to ultra-clean BS-VI grade fuel from April 1.