Recently, nearly 3,000 cattle have died in Rajasthan and Gujarat due to a viral infection called the Lumpy Skin Disease (LSD) that has spread across the states.
What is the Lumpy Skin Disease?
- According to a report by GAVI, the Global Alliance for Vaccines and Immunisation, the Lumpy Skin Disease (LSD) disease is caused by a virus called the Capripoxvirus and is “an emerging threat to livestock worldwide”.
- It is genetically related to the goatpox and sheeppox virus family.
- LSD infects cattle and water buffalo mainly through vectors such as blood-feeding insects.
- Signs of infection include the appearance of circular, firm nodes on the animal’s hide or skin that look similar to lumps.
- Infected animals immediately start losing weight and may have fever and lesions in the mouth, along with a reduced milk yield. Other symptoms include excessive nasal and salivary secretion.
- Pregnant cows and buffaloes often suffer miscarriage and in some cases, diseased animals can die due to it as well.
Have such outbreaks occurred earlier; and are humans at risk?
- This is not the first time LSD has been detected in India.
- The disease has been endemic in most African countries, and since 2012 it has spread rapidly through the Middle East, Southeast Europe and West and Central Asia.
- According to the World Organisation for Animal Health (WOAH), of which India is a member, mortality rates of 1 to 5 per cent are considered usual.
- The disease is not zoonotic, meaning it does not spread from animals to humans, and humans cannot get infected with it.
- While the virus does not spread to humans, “milk produced by an infected animal will be fit for human consumption after boiling or pasteurisation as these processes will kill the viruses, if any, in the milk.
How can the spread of the disease be prevented?
- Successful control and eradication of LSD relies on “early detection…followed by a rapid and widespread vaccination campaign”, as per the WOAH. Once an animal has recovered, it is well protected and cannot be the source of infection for other animals.
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