![]() Between August 2013 and March 2015, serum, whole blood and/or spleen samples were collected from 31 coatis, 78 crab-eating foxes, seven ocelots, 42 dogs, 110 wild rodents, and 30 marsupials. in wild animals, domestic dogs and their respective ectoparasites in southern Pantanal region, central-western Brazil, by molecular and serological techniques. The present work aimed to investigate the occurrence of Rickettsia spp. The genus Rickettsia comprises obligatory intracellular bacteria, well known to cause zoonotic diseases around the world. albiventris, its importance has to be quantified in further studies considering the epidemiological scenario of BSF. Our results suggest that higher diversity of ticks, hosts and rickettsiae could be relevant factors in buffering the effect in BSF occurrence. At least three Rickettsia species, non-pathogenic to humans, were detected in natural areas (Rickettsia bellii, Rickettsia amblyommatis and ‘Candidatus Rickettsia andeanae’), and only one non-pathogenic species in HMLs (R. Didelphis albiventris in E areas presented higher seroprevalence and endpoint titres against R. Composition and abundance of ticks in natural areas were very dissimilar from HMLs, with the lowest tick burdens. sculptum infesting small mammals, but the numbers of ticks were much lower than in E areas. In NE areas, this dominance was inverted, with more A. sculptum, followed by Amblyomma dubitatum in E areas. Communities of ticks were dominated by A. The marsupial Didelphis albiventris was dominant in HMLs, but not in natural areas, and this opossum was the main host for the tick Amblyomma sculptum, principal vector of R. Composition and equitability were important components of diversity explaining differences among areas. ![]() We compared E and NE areas in human-modified landscapes (HMLs) and natural areas (BIO) with no report of BSF cases. We studied communities of small mammals and their ticks in endemic (E) and non-endemic (NE) areas for Brazilian spotted fever (BSF), aiming to infer if diversity parameters of parasites and hosts could be related to occurrence and prevalence of rickettsial infection, especially Rickettsia rickettsii. The following species were colleted or reported on scientific literature: Argas miniatus Koch, 1844 Ornithodoros rostratus Aragão, 1911 Dermacentor nitens Newmann, 1897 Rhipicephalus ( Boophilus) microplus Canestrini, 1887 Amblyomma tigrinum Koch, 1844 A. Ornithodoros rostratus (Argasidae) was very abundant, being the more important Argasidae tick on the study region. Amblyomma sculptum was the most common and abundant hard tick. Sixteen were hard ticks (Ixodidae) and two soft ticks (Argasidae). Summing up, 18 tick species were listed for the region. Among domestic animals, dogs, horses and cattle were examined. Although, the pampas deer ( Ozotocerus bezoarticus) and giant anteater ( Mymercophaga tridactyla) also has a good representation on study. Carnivores were the main taxa group examined. Most of animals were small or medium mammals. ![]() This is a commented list of tick’s species collected on various wild and domestic animals, including the reports on scientific literature for the studied region. ![]()
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