Snakes could be the source of the Wuhan coronavirus outbreak
BEIJING: The Chinese krait and the Chinese cobra may be the original source of the newly discovered coronavirus that has triggered an outbreak of a deadly infectious respiratory illness in China this winter.
The many-banded krait (Bungarus multicinctus), also known as the Taiwanese krait or the Chinese krait, is a highly venomous species of elapid snake found in much of central and southern China and Southeast Asia.
The illness was first reported in late December 2019 in Wuhan, a major city in central China, and has been rapidly spreading. Since then, sick travellers from Wuhan have infected people in China and other countries including the US.
Using samples of the virus isolated from patients, scientists in China have determined the genetic code of the virus and used microscopes to photograph it.
The pathogen responsible for this pandemic is a new coronavirus. It’s in the same family of viruses as the well-known severe acute respiratory syndrome coronavirus (SARS-CoV) and Middle East respiratory syndrome coronavirus (MERS-CoV), which have killed hundreds of people in the past 17 years.
The World Health Organization (WHO) has named the new coronavirus 2019-nCoV.
In the case of this 2019 coronavirus outbreak, reports state that most of the first group of patients hospitalised were workers or customers at a local seafood wholesale market which also sold processed meats and live consumable animals including poultry, donkeys, sheep, pigs, camels, foxes, badgers, bamboo rats, hedgehogs and reptiles.
However, since no one has ever reported finding a coronavirus infecting aquatic animals, it is plausible that the coronavirus may have originated from other animals sold in that market.
The hypothesis that the 2019-nCoV jumped from an animal at the market is strongly supported by a new publication in the Journal of Medical Virology. The scientists conducted an analysis and compared the genetic sequences of 2019-nCoV and all other known coronaviruses.
The study of the genetic code of 2019-nCoV reveals that the new virus is most closely related to two bat SARS-like coronavirus samples from China, initially suggesting that, like SARS and MERS, the bat might also be the origin of 2019-nCoV.
The authors further found that the viral RNA coding sequence of 2019-nCoV spike protein, which forms the “crown” of the virus particle that recognises the receptor on a host cell, indicates that the bat virus might have mutated before infecting people.
CNN
