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  1. Sep 20, 2024 · Lyme disease is classified as a zoonosis, as it is transmitted to humans from a natural reservoir among small mammals and birds by ticks that feed on both sets of hosts. [ 64 ] Hard-bodied ticks of the genus Ixodes are the vectors of Lyme disease (also the vector for Babesia). [ 65 ]

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  3. 3 days ago · Rickettsia rickettsii causes Rocky Mountain spotted fever, a life-threatening disease that occurs primarily in the Southeastern states, for example, North Carolina of the United States. Rickettsia prowazekii causes epidemic typhus, also a life-threatening disease that occurs mainly in crowded, unsanitary living conditions during wartime.

  4. Sep 13, 2024 · The rickettsias, which range in size from 250 nanometers to more than 1 micrometer and have no cell wall but are surrounded by a cell membrane, cause a group of diseases characterized by fever and a rash.

  5. Sep 5, 2024 · Tick-borne rickettsioses, caused by Gram-negative bacteria of the Rickettsia genus, pose a growing global threat, with various arthropod vectors contributing to their transmission.

  6. Sep 16, 2024 · Neutralization of RLip activity, by antibody-blocking, significantly abrogated R. rickettsii escape from bactericidal phagolysosomal fusion, suggesting RLip plays a critical role in facilitating the intracytosolic colonization of pathogenic R. rickettsii.

  7. Sep 20, 2024 · In Brazil, Amblyomma cajennense is considered the most important vector for Rickettsia rickettsii, the causal agent for Brazilian spotted fever. This tick species is widely distributed in Brazil and is frequently found infesting human beings.

  8. Sep 6, 2024 · Rickettsia is a genus of nonmotile, gram-negative, nonspore-forming, highly pleomorphic bacteria that may occur in the forms of cocci, bacilli, or threads. The genus was named after Howard Taylor Ricketts in honor of his pioneering work on tick-borne spotted fever. Read more. 1 of 23. Image source: https://www.youtube.com/watch?v=H1Emaos_UXY.

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