GetTRDoc - Annals of Tropical Medicine & Parasitology,...

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The ticks (Acari: Ixodida: Argasidae, Ixodidae) of Paraguay S. NAVA * , M. LARESCHI { , C. REBOLLO { , C. BENI ´ TEZ USHER 1 , L. BEATI " , R. G. ROBBINS ** , L. A. DURDEN " , A. J. MANGOLD * and A. A. GUGLIELMONE * * Instituto Nacional de Tecnologı´a Agropecuaria, Estacio ´n Experimental Agropecuaria Rafaela, CC 22, CP 2300 Rafaela, Santa Fe, Argentina { Centro de Estudios Parasitolo ´gicos y de Vectores, 2 N u 584, CP 1900, La Plata, Argentina { Parasitology Department, Faculty of Veterinary Sciences, San Lorenzo, Paraguay 1 Consult-pec, Jose ´D .Lo ´pez 200, Asuncio ´n, Paraguay " United States National Tick Collection, Institute of Arthropodology and Parasitology and Department of Biology, Georgia Southern University, Statesboro, GA 30460-8056, U.S.A. ** Defense Pest Management Information Analysis Center, Armed Forces Pest Management Board, Walter Reed Army Medical Center, Washington, DC 20307-5001, U.S.A. Received 13 October 2005, Accepted 24 July 2006 The ticks reported in Paraguay, which are here reviewed, can be categorized as ‘endemic or established’ ( Argas persicus or a sibling species, Ornithodoros hasei , O. rostratus , O. rudis , O. talaje / O. puertoricensis , Amblyomma aureolatum , Am. auricularium , Am. brasiliense , Am. cajennense , Am. calcaratum , Am. coelebs , Am. dissimile , Am. dubitatum , Am. incisum , Am. longirostre , Am. nodosum , Am. ovale , Am. pacae , Am. parvum , Am. pseudoconcolor , Am. rotundatum , Am. scutatum , Am. tigrinum , Am. triste , Dermacentor nitens , Haemaphysalis juxtakochi , H. leporispalustris , Ixodes loricatus , Rhipicephalus microplus , and Rh. sanguineus ), ‘probably endemic or established’ ( Ar. miniatus , Ar. monachus , Am. argentinae , Am. humerale , Am. naponense , Am. oblongoguttatum , Am. pseudoparvum , I. aragaoi/I. pararicinus , I. auritulus , I. luciae ), or ‘erroneously reported from Paraguay’( O. coriaceus , Am. americanum and Am. maculatum ). Most Paraguayan tick collections have been made in the Chaco phyto–geographical domain, in the central part of the country. Argas persicus or a related species, Am. cajennense , D. nitens , Rh. microplus and Rh. sanguineus are important parasites of domestic animals. Ornithodoros rudis , Am. aureolatum , Am. brasiliense , Am. cajennense , Am. coelebs , Am. incisum , Am. ovale and Am. tigrinum have all been collected from humans. In terms of public health, the collections of Am. cajennense and Am. triste from humans may be particularly significant, as these species are potential vectors of Rickettsia rickettsii and Ri. parkeri , respectively. Ticks (suborder Ixodida, superfamily Ixodoidea) are large, obligately haemato- phagous mites that, in some or all of their post-embryonic stages, are ectoparasites, infesting all classes of vertebrates except fish. Several species are vectors of agents that may cause disease in, or even kill, their hosts, and even uninfected ticks may cause dermatoses, envenomization, exsanguina- tion or paralysis. Most research on Neotropical ticks has been focused on those species of importance to livestock, especially the cattle tick Rhipicephalus (formerly Boophilus ) microplus (Canestrini). Recent outbreaks of tick-transmitted human rick- ettsiosis in Argentina (Ripoll et al ., 1999), Brazil (Silva and Galva ˜o, 2004) and
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GetTRDoc - Annals of Tropical Medicine & Parasitology,...

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