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Powassan encephalitis, caused by the Powassan virus (POWV), a flavivirus also known as the deer tick virus, is a form of arbovirus infection that results from tick bites.It can occur as a co-infection with Lyme disease, as both are transmitted to humans by the same species of tick. [1]
If you find a tick, remove it immediately. “Ticks take their time setting up shop to feed on your blood, so it generally takes 36 to 48 hours to transmit infection,” says Loafman.
Lyme disease, also known as Lyme borreliosis, is a tick-borne disease caused by species of Borrelia bacteria, transmitted by blood-feeding ticks in the genus Ixodes. [4] [9] [10] The most common sign of infection is an expanding red rash, known as erythema migrans (EM), which appears at the site of the tick bite about a week afterwards. [1]
Deer tick 3D rendering of a male and female deer tick Ixodes scapularis is the main vector of Lyme disease in North America. [ 14 ] The CDC reported over 30,000 new cases of the disease in 2016 alone, the majority of which were contracted in the summer months, which is when ticks are most likely to bite humans. [ 15 ]
Ticks are parasitic bloodsuckers, capable of spreading deadly disease, and they are becoming increasingly common. Here’s what you need to know about them.
There are many types of ticks in the U.S., and many of them can spread multiple pathogens that cause illness in humans. Here are some of the tick species that experts worry most about from a ...
Powassan virus is an RNA virus split into two separate lineages: Lineage I, labeled as the "prototype" lineage; and Lineage II, the deer tick virus (DTV) lineage. [9] Lineage II has the most genetic variation, which indicates that it is most likely the ancestral lineage that split as a result of positive natural selection. [9]
New England has two primary tick species — the black-legged or deer tick, and the dog tick. Both are most active in the spring and summer. The deer tick is smaller but carries Lyme disease.