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General Studies 3 >> Enivornment & Ecology

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RACCOON DOGS

RACCOON DOGS

1. Context 

A new analysis of genetic data collected from the Huanan Seafood Market in Wuhan, China, has linked coronavirus to raccoon dogs, adding evidence to the belief that the pandemic might have originated from the infected animals sold at the site.

2. Key points

  • World Health Organization Director-General Tedros Adhanom Ghebreyesus said, "These data do not provide a definitive answer to how the pandemic began, but every piece of data is important to moving us closer to that answer".
  • The genetic data was gathered from swabs taken from in and around the market back in January 2020, shortly after the Chinese government had shut down the market because of suspicions that it was linked to the outbreak of a new virus.
  • A previous analysis of the same data was published last year, showing that it contained both Covid and Human DNA. 
  • Moreover, Chinese researchers at the time denied that the samples consisted of any animal DNA.
  • The new findings have proved them wrong and revealed that the Covidpositive samples were rich in DNA from raccoon dogs.
  • However, they don't prove that these animals or any other animals were responsible for triggering the pandemic.

3. About Raccoon dogs

  • Raccoon dogs are neither dogs nor raccoons. They belong to the canid family and are closely related to foxes.
  • They are the only canids that hibernate during the winter. As per Slate, there are two species of raccoon dogs:
  1. Nyctereutes procyonoides, the common raccoon dog (the Species that was in the Wuhan market) and
  2. Nyctereutes p. viverrinus, the Japanese raccoon dog.
  • These animals, weighing around 16 pounds on average are omnivores and relish food sources such as rodents and berries.
  • Although they appear svelte in the summer, they pack on the pounds for winter, when their fur also becomes thicker. They are monogamous, often living in pairs.
Image source: Sky News

4. Where are raccoon dogs are found?

  • Raccoon dogs are originally from East Asia and are commonly found in parts of China, Korea and Japan, where they are known as tanuki.
  • They are also found in Europe, fur traders first brought them in the 1920s.
  • Today, raccoon dogs are considered to be a threat to the local ecosystem in Europe and an EU report declared them "one of the most successful alien carnivores in Europe".
  • However, in Japan, tanuki is revered. In folklore, tanuki is funloving tricksters who could shape-shift and are often associated with good financial luck.
  • They are often depicted with giant scrotums that they can expand and shape into useful objects such as umbrellas and fishing nets.

5. Reasons for raccoon dogs being sold in Wuhan

  • For decades, these animals have been farmed for their fur. 
  • Every year, according to the Humane Society of the United States, millions are killed in China, a leading producer of raccoon dog pelts and the US buys a huge share of the products.
  • To meet this huge demand, sellers raise raccoon dogs in small and crowded facilities while transporting them in small cages, often stacked with those of other animals.
  • This serves as a perfect breeding ground for the spread of different diseases.

6. Raccoon dogs linked to other diseases 

  • Raccoon dogs and related mammals sold for food at a live animal market in China in 2003 were found to carry a coronavirus similar to the virus found in humans during a SARS Coronavirus outbreak at the time.
  • A 2022 study after taking samples from about 2, 000 animals of 18 different species in China found that wild animals known to be consumed by humans, including raccoon dogs, carried 102 different viruses from 13 viral families 21 of which posted a high-risk to humans.
  • It also added that raccoon dogs specifically carried four canine coronaviruses that were genetically similar to those found in humans.
  • But this does not mean they are the natural reservoir for coronaviruses.
  • Scientists believe there is a possibility the tested raccoon dogs, including those in the Wuhan market, might have picked up the virus from bats or another species.

For Prelims & Mains

For Prelims: Coronavirus, WHO, China, Wuhan market, Raccoon dogs, fur trade, 
For Mains: 
1. What are Raccoon dogs and discuss how they are linked with the origins of the covid 19 pandemic. (250 Words)

Previous year questions

1. In the context of vaccines manufactured to prevent COVID-19 pandemic, consider the following statements: (UPSC 2022)
1. The Serum Institute of India produced COVID-19 vaccine named Covishield using mRNA platform.
2. Sputnik V vaccine is manufactured using vector-based platform.
3. COVAXIN is an inactivated pathogen-based vaccine.
Which of the statements given above are correct?
A. 1 and 2 only
B. 2 and 3 only
C. 1 and 3 only
D. 1, 2 and 3
 
Answer: B
Explanation 
The covishield vaccine is based on the platform which uses a recombinant, replication-deficient chimpanzee adenovirus vector encoding the SARS-CoV-2 Spike (S) glycoprotein. The Serum Institute of India produced a COVID-19 vaccine named Covishield but not using mRNA platform.
 
Source: The Indian Express

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