Amblyomma triste

Amblyomma triste is a tick in the Amblyomma genus. The tick can be found in Venezuela, Argentina, Brasil, Colombia, Peru and Uruguay.[1][2] Though not thought to be endemic to North America, a 2010 study found 27 specimens in 18 separate collections that had previously been misidentified in the United States.[3]

Amblyomma triste
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Chelicerata
Class: Arachnida
Order: Ixodida
Family: Ixodidae
Genus: Amblyomma
Species:
A. triste
Binomial name
Amblyomma triste
Koch, 1844

The species has been found to carry the human-infectious Rickettsia parkeri which produces symptoms similar to Rocky Mountain spotted fever.[4] The tick is the only tick responsible for tick-borne disease in humans in Uruguay,[4] and has been identified as a significant vector of disease in Argentina and Brazil.[3]

The tick was first described by Koch in 1844.[1] The tick is morphologically similar to Amblyomma maculatum and Amblyomma tigrinum. both of which are also carriers of Rickettsia parkeri.[5] Identification of the species in North America, is often due to the fact that they are cryptic species with those two species.[3]

References
  1. "Amblyomma triste". Catalogue of Life - 2019 Annual Checklist. Retrieved 2022-06-22.
  2. Guglielmone, Alberto A.; Nava, Santiago; Mastropaolo, Mariano; Mangold, Atilio J. (2013-09-01). "Distribution and genetic variation of Amblyomma triste (Acari: Ixodidae) in Argentina". Ticks and Tick-borne Diseases. 4 (5): 386–390. doi:10.1016/j.ttbdis.2013.01.009. ISSN 1877-959X.
  3. Mertins, James W.; Moorhouse, Arnold S.; Alfred, Jeffery T.; Hutcheson, H. Joel (2010-07-01). "Amblyomma triste (Acari: Ixodidae): New North American Collection Records, Including the First From the United States". Journal of Medical Entomology. 47 (4): 536–542. doi:10.1093/jmedent/47.4.536. ISSN 0022-2585. PMC 7027265. PMID 20695268.
  4. Venzal, José M.; Estrada Peña, Agustín; Portillo, Aránzazu; Mangold, Atilio Jose; Castro, Oscar; de Souza, Carlos G.; Félix, María L.; Pérez Martínez, Laura; Santibánez, Sonia; Oteo, José A. (May 2012). "Rickettsia parkeri: A Rickettsial pathogen transmitted by ticks in endemic areas for spotted fever rickettsiosis in southern Uruguay". doi:10.1590/S0036-46652012000300003. hdl:11336/96556. ISSN 1678-9946. {{cite journal}}: Cite journal requires |journal= (help)
  5. Ossa-López, Paula A.; Robayo-Sánchez, Laura Natalia; Uribe, Juan E.; Ramírez-Hernández, Alejandro; Ramírez-Chaves, Héctor E.; Cortés-Vecino, Jesús A.; Rivera-Páez, Fredy A. (2022-05-01). "Extension of the distribution of Amblyomma triste Koch, 1844: Morphological and molecular confirmation of Morphotype I in Colombia". Ticks and Tick-borne Diseases. 13 (3): 101923. doi:10.1016/j.ttbdis.2022.101923. ISSN 1877-959X.
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