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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]
Ornithodoros moubata, commonly known as the African hut tampan [1] or the eyeless tampan, [2] is a species of tick in the family Argasidae. It is an ectoparasite and vector of relapsing fever in humans, [ 3 ] [ 4 ] and African swine fever in pigs.
Ehrlichiosis ewingii infection [1] is an infectious disease caused by an intracellular bacteria, Ehrlichia ewingii. [2] The infection is transmitted to humans by the tick, Amblyomma americanum . This tick can also transmit Ehrlichia chaffeensis , the bacteria that causes human monocytic ehrlichiosis (HME).
People can get infected with Babesia parasites by the bite of an infected tick, by getting a blood transfusion from an infected donor of blood products, or by congenital transmission (an infected mother to her baby). [4] Ticks transmit the human strain of babesiosis, so it often presents with other tick-borne illnesses such as Lyme disease. [5]
In 1985, the organism was first propagated reliably in tissue culture. A new species of Ehrlichia was discovered inside the deer tick Ixodes scapularis. This newly found organism has only been isolated from deer ticks in Wisconsin and Minnesota in the USA. The species is known as Ehrlichia Wisconsin HM543746. [citation needed]
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Human monocytotropic ehrlichiosis occurs in California in Ixodes pacificus ticks and in Dermacentor variabilis ticks. [14] Nearly 600 cases were reported to the CDC in 2006. In 2001–2002, the incidence was highest in Missouri, Tennessee, and Oklahoma, as well as in people older than 60.
Human granulocytic anaplasmosis (HGA) is a tick-borne, infectious disease caused by Anaplasma phagocytophilum, an obligate intracellular bacterium that is typically transmitted to humans by ticks of the Ixodes ricinus species complex, including Ixodes scapularis and Ixodes pacificus in North America.