Ticks (Acari: Ixodidae) parasitizing humans in an Atlantic rainforest reserve of Southeastern Brazil with notes on host suitability

Szabó, Matías Pablo Juan; Labruna, Marcelo B.; Castagnolli, Karina Carrão; Garcia, Marcos Valério; Pintér, Adriano; Veronez, Viviane Aparecida; Magalhães, Geórgia Modé; Castro, Márcio Botelho de; Vogliotti, Alexandre

doi:10.1007/s10493-006-9013-6

Cited by 48 publications

(31 citation statements)

References 14 publications

(17 reference statements)

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“…In fact, during the present fieldwork, two adult males of A. ovale were collected from a free-ranging coati (Nasua nasua) in Anhembi (CNC-2464). Human parasitism by the adult stage of A. ovale is relatively common in areas of occurrence of this tick species (LABRUNA et al, 2005;SZABÓ et al, 2006). once A. ovale is vector of Hepatozoon canis for domestic dogs (FoRLANo et al, 2005) and a causative agent of spotted fever (Rickettsia sp.…”

Section: Discussionmentioning

confidence: 99%

Ticks infesting wild small rodents in three areas of the state of São Paulo, Brazil

et al. 2016

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Section: Discussionmentioning

confidence: 99%

Ticks infesting wild small rodents in three areas of the state of São Paulo, Brazil

et al. 2016

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“…ovale usually parasitizes wild animals but it is possible to find these ticks on dogs in rural areas (ARAGÃO; FONSECA, 1961). The occurrence of A. ovale parasitizing humans is described in an Atlantic rainforest reserve in Southeastern Brazil (SZABÓ et al, 2006). We observed A. ovale parasitizing dogs in the both studied areas, raising the question as to whether A. ovale could have been infected by and transmitted R. parkeri or a similar rickettsia in Paraná State as an explanation for some of the high titers observed in dogs, since one strain of R. parkeri has been reported infecting A. ovale ticks in the state of São Paulo, southeastern Brazil (SABATINI et al, 2010).…”

Section: Discussionmentioning

confidence: 99%

Survey of rickettsiae in humans, dogs, horses, and ticks in Northern Paraná, Brazil

et al. 2011

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Brazilian Spotted Fever is a disease caused by Rickettsia rickettsii, and is transmitted to humans and animals by Amblyomma spp. The objective of this work was to study the epidemiology of spotted fever group rickettsiae in rural areas of Northern Parana. In Alvorada do Sul municipality, 88 humans, 83 dogs, and 18 horses were sampled, and in Arapongas municipality, 138 humans, 90 dogs and 18 horses were studied. All the sera were tested by IFA in which R. rickettsii and R. parkeri were used as antigens, considering titers ≥ 64 positive. Ticks collected from dogs and horses were tested by PCR. In Alvorada do Sul, 24% and 16.1% of humans, 55.6% and 22.2% of horses and, 22.9% and 18.1% of dogs were seropositive for R rickettsii and R. parkeri, respectively. In Arapongas, 9.4% and 4.3% of the humans, 5.6% and 5.6% of horses and, 13.3% and 12.2% of the dogs were seropositive for R. rickettsii and R. parkeri, respectively. PCR detected seven ticks with gltA sequences that showed similarity with R. bellii. The presence of antibodies to R. parkeri and R. rickettsii in dogs, horses and humans demonstrates a potential risk for spotted fever group rickettsiae in these areas. Key words: Rickettsia spp., brazilian spotted fever, Amblyomma spp., epidemiology AbstractFebre Maculosa Brasileira é uma doença causada por Rickettsia rickettsii, e é transmitida para humanos e animais por Amblyomma spp. O objetivo deste trabalho foi estudar a epidemiologia de riquétsias do grupo da febre em áreas rurais do Norte do Paraná. No município de Alvorada do Sul, 88 pessoas, 83 cães e 18 cavalos foram amostrados, e no município de Arapongas, 138 seres humanos, 90 cães e 18 cavalos foram estudados. Todos os soros foram testados por IFI com R. rickettsii e R. parkeri como antígenos, considerando-se os títulos ≥ 64 positivos. Carrapatos coletados de cães e cavalos foram testados por PCR. Em Alvorada do Sul, 24% e 16,1% dos seres humanos, 55,6% e 22,2% de cavalos e, 22,9% e 18,1% de cães foram soropositivos para R. rickettsii e R. parkeri, respectivamente. Em Arapongas, 9,4% e 4,3% dos seres humanos, 5,6% e 5,6% de cavalos e, 13,3% e 12,2% dos cães foram soropositivos para R. rickettsii

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“…Recent studies have shown that A. ovale is an important human-biting tick in South America (Guglielmone et al 2006;Szabó et al 2006), and the most common human-biting tick in the western Brazilian Amazon (Labruna et al 2005b). All these human infestations have referred to the tick adult stage, which was recently shown to be naturally infected by the human pathogen Rickettsia parkeri strain Atlantic rainforest in Brazil (Sabatini et al 2010;Medeiros et al 2011), where human rickettsioses caused by this emerging pathogen has been reported recently (Spolidorio et al 2010;Silva et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Life-cycle and host preference of Amblyomma ovale (Acari: Ixodidae) under laboratory conditions

Moura

Labruna

2011

Exp Appl Acarol

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This study evaluated for the first time the life cycle of Amblyomma ovale in the laboratory. For this purpose, larvae and nymphs were exposed to Gallus gallus (chickens), Cavia porcellus (guinea pigs), Rattus norvegicus (wistar rats), Oryctolagus cuniculus (domestic rabbits), Calomys callosus (vesper mouse), and Didelphis albiventris (whiteeared opossum). Nymphs were also exposed to Nectomys squamipes (South American water rat). Adult ticks were fed on dogs. The life-cycle of A. ovale in laboratory could be completed in an average period of ca. 190 days, considering prefeeding periods of 30 days for each of the parasitic stages. Vesper mice were the most suitable host for A. ovale larvae, whereas water rats were the most suitable host for A. ovale nymphs. Our results, coupled with literature data, strongly indicate that small rodents have an important role in the life history of A. ovale. Chickens (the only avian host used in the present study) showed to be moderately suitable hosts for subadult A. ovale ticks, indicating that wild birds might have a secondary role in the life history of A. ovale. Domestic dogs showed to be highly suitable for the adult stage of A. ovale, in agreement with literature data that indicate that the domestic dog is currently one of the most important hosts of A. ovale adult ticks in Latin America.

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Ticks (Acari: Ixodidae) parasitizing humans in an Atlantic rainforest reserve of Southeastern Brazil with notes on host suitability

Cited by 48 publications

References 14 publications

Ticks infesting wild small rodents in three areas of the state of São Paulo, Brazil

Ticks infesting wild small rodents in three areas of the state of São Paulo, Brazil

Survey of rickettsiae in humans, dogs, horses, and ticks in Northern Paraná, Brazil

Life-cycle and host preference of Amblyomma ovale (Acari: Ixodidae) under laboratory conditions

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