Ticks (Acari: Ixodidae) Associated with Wild Animals in the Pantanal Region of Brazil

Departamento de Parasitologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, Av. Prof. Lineu Prestes 1374, São Paulo-SP-CEP-05508-900, Brazil.
Journal of Medical Entomology (Impact Factor: 1.95). 12/2000; 37(6):979-83. DOI: 10.1603/0022-2585-37.6.979
Source: PubMed


This paper describes the identification of ticks from wild animals of the Pantanal region in Brazil as part of a comprehensive study about established and emerging tick-host relationships and related pathological aspects. Eighty-one animals were captured (representing 13 species, six orders), and ticks were found on 63 (78%). Tick species identified included Boophilus microplus (Canestrini), Amblyomma cajennense (F.), Amblyomma parvum Aragão, Amblyomma pseudoconcolor Aragão, Amblyomma scalpturatum Neumann, Amblyomma nodosum Neumann, Amblyomma ovale Koch, and Amblyomma tigrinum Koch. Dragging from grasslands yielded negative results compared with the high concentration of ticks that were collected from leaves in the forests.

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    • "This tick species was first reported in Brazil by Aragão (1911) and has since then been found in several states of the country such as Goiás, Mato Grosso do Sul, Mato Grosso, Minas Gerais, Paraná, Rio de Janeiro, Rondônia, Rio Grande do Sul and São Paulo (ARAGÃO, 1936; ARZUA et al., 2005; BECHARA et al., 2002; CAMPOS PEREIRA et al., 2000; EVANS et al., 2000; LABRUNA et al., 2005; MARTINS et al., 2004). Larvae and nymphs of A. nodosum are mostly found on birds of several species (JONES et al., 1972; LABRUNA et al., 2007; OGRZEWALSKA et al., 2009a), whereas adults have a more restricted host range involving mainly members of the family Myrmecophagidae such as the Southern Tamandua (Tamandua tetradactyla) and the Giant Anteater (Myrmecophaga tridactyla) (CAMPOS PEREIRA et al., 2000; GUGLIELMONE et al., 2003; ARZUA et al., 2005). These hosts, however, are found in all Brazilian biomes (PAGLIA et al., 2012). "

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    • "In Brazil, this tick has been found mainly on wild animals such as deer, anteaters and carnivores (Pereira et al., 2000; Martins et al., 2004; Labruna et al., 2005). Among the few reports on domestic animals, Szabó et al. (2007) recorded A. parvum parasitizing buffaloes, dogs and horses in the Brazilian savannah, the Cerrado, as well as human biting. "
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    ABSTRACT: Amblyomma parvum is a Neotropical tick that is widely spread and a potential vector of pathogens, including Rickettsiae. Genetic differences are remarkable between A. parvum populations from Brazil and Argentina. In this work, feeding and reproduction parameters of A. parvum ticks from these two populations were compared on some key host species to evaluate possible differences in host suitability between them. On the whole parameters of these tick populations were similar when fed on the same host and varied similarly on different host species. Still, bovines were more suitable host for Argentinian larvae than for Brazilian cohorts. It was observed that guinea pigs were the best host A. parvum immatures from both origins, as depicted from higher recovery rate of larvae and heavier engorged nymph weights. Canids and bovids were host species most suitable to adults of both tick populations as shown by the highest number of larvae produced by adult females that engorged on these hosts. Taken together, results showed that in spite of the genetic divergence, A. parvum from Argentina and Brazil have similar biological performance on various host species.
    Veterinary Parasitology 07/2013; 197(1-2). DOI:10.1016/j.vetpar.2013.06.018 · 2.46 Impact Factor
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    • "The third tick species, A. nodosum, was found in the adult stage on both anteater species. In fact, the adult stage is restricted to members of the Myrmecophagidae family, which includes the Southern anteater and the giant anteater (PEREIRA et al., 2000; GUGLIELMONE et al., 2003; ARZUA et al., 2005). By contrast, their immature stages are bird parasites (JONES et al., 1972; LABRUNA et al., 2007; OGRZEWALSKA et al., 2009a; TOLESANO-PASCOLI et al., 2010). "
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    ABSTRACT: Herein, we report tick species found on wild and domestic animals and in the environment during a one-year sampling period at the Brazilian Farming Research Company beef cattle unit (Embrapa Beef Cattle), which is located within the urban area of Campo Grande, Mato Grosso do Sul, Brazil. From 55 wild hosts including six different species (Nasua nasua, Cebus spp., Cerdocyon thous, Myrmecophaga tridactyla, Tamandua tetradactyla and Dasyprocta aguti), 323 ticks were collected. Amblyomma ovale ticks were found solely on coatis, and Amblyomma nodosum was identified solely on anteaters. No ticks were found on capuchin monkeys. However, Amblyomma cajennense was found on all parasitized host species with the exception of capuchin monkeys. Giant anteaters displayed the highest infestation abundance, with a mean of 53 ticks∕animal. Environmental sampling yielded 166 adult A. cajennense ticks. The tick species found on domestic animals (Rhipicephalus (Boophilus) microplus, R. sanguineus, Dermacentor nitens and A. cajennense) were those typically found on these hosts in Brazil. The most prevalent tick species, A. cajennense, was found on both wild and domestic animals and was also prevalent in the environment. Thus, this tick species is the primary vector that allows pathogens to bridge wild and domestic animals in the Cerrado.
    Revista brasileira de parasitologia veterinaria = Brazilian journal of veterinary parasitology: Orgao Oficial do Colegio Brasileiro de Parasitologia Veterinaria 03/2013; 22(1):124-128. DOI:10.1590/S1984-29612013000100023 · 0.87 Impact Factor
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