Recently, a woman died in United States due to infection of tick- borne Powassan virus. She was in her 90s. She’s the second person to test positive for Powassan virus in 2022.
What’s Powassan virus?
Powassan virus is a Flavivirus, which is transmitted by ticks. This virus is found in North America and Russian Far East. It’s named after the city of Powassan, Ontario. In Powassan town, this virus was first identified in 1958, for the first time.
Where is the virus found?
Powassan virus is found in the warm climate across Eurasia. In Eurasia, it’s a part of tick- borne encephalitis virus- complex. In Russian Far East, it appears to be introduced there 70 years ago.
Types of Powassan virus
Two types of Powassan virus are found in North Americaviz., lineage 1 and lineage 2.
Evolution of the virus
Powassan virus is an RNA virus, that split into two separate lineages namely
Lineage I – It’s labelled as “ prototype ” lineage; and
Lineage II – It’s labelled as deer tick virus( DTV) lineage.
Lineage II has the most genetic variation. It’s most likely the ancestral lineage, splitting due to positive natural selection. DTV is very closely related to Powassan virus.
How does this virus spread?
It spread through the bite of a tick infected with Powassan virus.
Symptoms of virus
Many people infected with the virus have no symptoms. Some shows mild symptoms like- Fever, Headache, Weakness, Vomiting, Encephalitis, Seizures, and Meningitis. Long- term neurologic symptoms include headaches and memory problems. Death is possible but it’s rare.
India and the United States have a long association with tea and the two democracies cherish their common love for the aromatic beverage, India's Ambassador to the US Taranjit Singh Sandhu has said. Speaking at an event dedicated to tea lovers...
State Bank of India is expected to release SBI PO Admit Card 2022 by next week. Candidates who have registered for Probationary Officer posts can check and download the admit card when released through the official site of SBI at sbi.co.in. As per the official...
. When asked about the logic behind NDTV’s takeover, Gautam Adani is reported to have said that he wants to build a global news brand. Asia’s richest man is also planning to roll out a super app soon. He is also raising over 2.5 billion dollars through an...