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Washington, Jun 30: Researchers in China have discovered a new type of swine flu that is capable of triggering a pandemic, according to a study published Monday in the US science journal PNAS.

Named G4, it is genetically descended from the H1N1 strain that caused a pandemic in 2009.

It possesses "all the essential hallmarks of being highly adapted to infect humans," say the authors, scientists at Chinese universities and China's Center for Disease Control and Prevention.

The researchers then carried out various experiments including on ferrets, which are widely used in flu studies because they experience similar symptoms to humans -- principally fever, coughing and sneezing. 

G4 was observed to be highly infectious, replicating in human cells and causing more serious symptoms in ferrets than other viruses.

Tests also showed that any immunity humans gain from exposure to seasonal flu does not provide protection from G4.

According to blood tests which showed up antibodies created by exposure to the virus, 10.4 percent of swine workers had already been infected.

The tests showed that as many as 4.4 percent of the general population also appeared to have been exposed.

The virus has therefore already passed from animals to humans but there is no evidence yet that it can be passed from human to human -- the scientists' main worry.

"It is of concern that human infection of G4 virus will further human adaptation and increase the risk of a human pandemic," the researchers wrote.

The authors called for urgent measures to monitor people working with pigs.

"The work comes as a salutary reminder that we are constantly at risk of new emergence of zoonotic pathogens and that farmed animals, with which humans have greater contact than with wildlife, may act as the source for important pandemic viruses," said James Wood, head of the department of veterinary medicine at Cambridge University.

A zoonotic infection is caused by a pathogen that has jumped from a non-human animal into a human.

Mangaluru, Jul 8: A corporator and a staff in Mangaluru City Corporation (MCC) have tested positive for the coronavirus. 

The woman corporator, who was under home quarantine for past few days ago, received her covid test report today. 

A staff of health department who works in MCC also tested positive for the covid-19. 

The woman corporator had recently attended a primary health centre meeting. A person who had attended the meeting was later tested positive. Hence the corporator was placed under home quarantine.

Mangaluru, May 23: Criticising the Karnataka government's fresh protocol for management of Covid-19 as expensive, a prominent physician in the city has demanded its withdrawal.

According to Dr B Srinivas Kakkilaya, the protocol released by the Health and Family Welfare Department on May 15 enlists unnecessary and unconfirmed tests and treatments. 

The protocol has classified Covid-19 cases into three categories and has provided for hospitalisation of all three categories of patients, from asymptomatic to the most severely ill.

In a letter to the government, Dr Kakkilaya said: "The protocol suggests several investigations to be done right on the day of admission, including blood counts, liver and renal function tests, chest X Ray, ECG, CT scan of the chest, and other special investigations, all of which, if done, will cost Rs 25,000 per patient."

"In the coming days when lakhs of patients are likely to be infected with SARS CoV2, is it necessary and feasible to hospitalise and test all these patients at Rs 25,000 per person," he questioned.

The treatment options suggested in the protocol are also surprising, he pointed out. "The protocol recommends choloroquine, azithromycin, oseltamivir, zinc and vitamin C for all patients, from asymptomatic to the severely ill, and also anti coagulant injections for many patients. All these would cost at least Rs 5,000 per patient. For severe cases of Covid-19, many unproven and experimental treatments have been suggested, which are very expensive and highly questionable," Dr Kakkilaya notes.

Therefore, this protocol, he asserted was not evidence based and likely to do more harm than good. He said these unnecessarily expensive tests and allowing private companies to conduct trials on Covid-19 patients is likely to be misused by vested interests and must be immediately withdrawn, and instead, a protocol that is evidence-based, simple and avoiding unnecessary expenses, must be developed.