Spatial distribution and impact of cattle-raising on ticks in the Pantanal region of Brazil by using the CO2 tick trap

Cançado, Paulo Henrique Duarte; Piranda, Eliane Mattos; Mourão, Guilherme; Faccini, João Luíz Horácio

doi:10.1007/s00436-008-0982-8

Cited by 42 publications

(45 citation statements)

References 29 publications

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“…The absence of A. rotundatum during flannel dragging supports the findings of Szabó et al (2007) and Cançado et al (2008) who also collected A. rotundatum from toads but not from dragging in different ecological regions. Based on these results and the finding of two engorged nymphs in the same habitat as the hosts, which seek refuges to avoid dehydration during the day, we assume that A. rotundatum exhibits nidicolous behavior at the studied site.…”

Section: Discussionsupporting

confidence: 84%

Patterns of parasitism by Amblyomma rotundatum (Ixodidae) on Rhinella schneideri (Bufonidae) in islands of São Francisco River, Minas Gerais, Brazil

2015

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We sampled ticks from specimens of the rococo toad Rhinella schneideriby flannel dragging on two Islands located in the São Francisco River near the Três Marias hydroelectric dam, southeastern Brazil. A total of 120 toads was examined, of which 63 (52.5%) were parasitized only by Amblyomma rotundatumtotaling 96 larvae, 163 nymphs and 134 females. The burden of parasitism ranged from one to 43 ticks, with a mean intensity of infestation of 6.2±5.5 ticks per host. The tick A. rotundatumexhibited highly aggregated distribution. Peak abundance of larvae and nymphs occurred in the dry season (May to September), whereas peak abundance of females occurred in the wet season (October to April). We collected most ticks near the head and hind limbs of R. schneideri. The finding of two engorged A. rotundatumnymphs in the same resting places of two toads and the absence of this species in the dragged areas suggest a nidicolous behavior at the studied site.

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Section: Discussionsupporting

confidence: 84%

Patterns of parasitism by Amblyomma rotundatum (Ixodidae) on Rhinella schneideri (Bufonidae) in islands of São Francisco River, Minas Gerais, Brazil

2015

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“…One negative aspect of CO 2 traps is their cost and the need for transportation of heavy dry ice before it sublimes away. Alternatively, traps that use other CO 2 sources such as the reaction between calcium carbonate and lactic acid (BUTLER et al, 1984;CANÇADO et al, 2008) may be used. It seems that these two kinds of CO 2 traps have similar results (GUEDES et al, 2012), but although the alternative CO 2 source is cheaper, it still has costs, in that a lot of material has to be carried and setting up each trap is time-consuming.…”

Section: Discussionmentioning

confidence: 99%

“…In visual searches, a trained observer looks for questing ticks on the tips of the leaves along animal trails (TERASSINI et al, 2010). Carbon dioxide traps are systems using a CO 2 source over a white surface that are placed on the ground to attract hunter ticks (OLIVEIRA et al, 2000;CANÇADO et al, 2008). Because dragging is convenient and inexpensive, it is the most commonly used method for estimating the abundance of free-living ticks (TACK et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

“…In these studies, dragging was the method most used for tick collection, followed by CO 2 traps (SZABÓ et al, 2007;CANÇADO et al, 2008;OGRZEWALSKA et al, 2009;TOLESANO-PASCOLI et al, 2010;VERONEZ et al, 2010;GARCIA et al, 2013;PASCOAL et al, 2013) and, more recently, visual searching in forest environments (LABRUNA et al, 2005;SILVA et al, 2008;SZABÓ et al, 2009). Few evaluations of tick sampling methods in Brazil have been made (TERASSINI et al, 2010;GUEDES et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Complementary data on four methods for sampling free-living ticks in the Brazilian Pantanal

Osava

Piovezan

Szabó

2014

Rev. Bras. Parasitol. Vet.

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In this study, four methods for sampling free-living ticks that are used in ecological and human tick-bite risk studies were evaluated. Cloth dragging, carbon dioxide traps and visual searches and inspection of plant litter on the ground were used in field and forest areas within the Brazilian Pantanal. Among the three tick species collected, Amblyomma sculptum predominated, followed by Amblyomma parvum and Amblyomma ovale. Dragging, a cheap and simple technique, yielded the highest numbers of ticks, particularly nymphs. The visual search detected a high number of adult ticks and provided information on tick questing height. Even though laborious, plant litter examination showed that large numbers of ticks may use this stratum. Carbon dioxide (CO 2 ) traps are expensive and difficult to handle, but they are highly efficient for adult ticks, especially A. parvum. These data indicate that one method alone is incapable of providing a representative sample of the tick fauna in a particular area and that multiple techniques should be used for tick population studies.Keywords: Off-host ticks, collecting techniques, CO 2 traps, cloth dragging, visual search, litter inspection. ResumoNeste estudo, foram avaliados quatro métodos de amostragem de carrapatos em vida livre, usados em estudos ecológicos e avaliação do risco de picadas em humanos. Arraste de flanela, armadilhas de gás carbônico (CO 2 ), busca visual e inspeção de serrapilheira foram aplicados em áreas campestres e florestais no Pantanal brasileiro. Dentre três espécies coletadas, a predominância foi de Amblyomma sculptum, seguida por Amblyomma parvum e Amblyomma ovale. O arraste, técnica simples e de baixo custo, resultou em maior número de carrapatos, particularmente de ninfas. A busca visual detectou alto número de carrapatos adultos e forneceu informações sobre altura de espera por hospedeiros. Apesar de trabalhoso, o exame da serrapilheira demonstrou que grande número de carrapatos pode utilizar esse estrato. Armadilhas de CO 2 têm custo elevado e são difíceis de manusear, entretanto, são altamente eficientes para carrapatos adultos, em especial para A. parvum. Esses dados indicam que somente um método é incapaz de fornecer amostra representativa da ixodofauna em uma área particular e que, para estudos populacionais, técnicas múltiplas devem ser usadas.Palavras-chave: Carrapatos em vida livre, técnicas de coleta, armadilhas de CO 2 , arraste de flanela, busca visual, inspeção de serrapilheira.

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“…This would also explain the tendency for a greater abundance of A. cajennense in the more disturbed area (Jequitibá Rosa trail). This species is commonly found in high abundance in impacted areas under high anthropogenic pressure (ARZUA, 2007;CANÇADO et al, 2008;SILVEIRA;FONSECA, 2011). Previous studies have reported that the prevalence of A. cajennense in tropical forests is low, although it is well adapted to a variety of environments (ESTRADA-PEÑA et al, 2004;SZABÓ et al, 2007;VERONEZ et al, 2010).…”

Section: Palavras-chave: Amblyomma Brasiliense Amblyomma Cajennensementioning

confidence: 99%

Free-living ixodid ticks in an urban Atlantic Forest fragment, state of Rio de Janeiro, Brazil

Pinheiro

Lourenço

Patrício

et al. 2014

Rev. Bras. Parasitol. Vet.

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As a consequence of the importance of ticks in forests in protected areas, was conducted survey of species of free-living ticks in the Natural Park Municipal Curió, state of Rio de Janeiro, Brazil. Monthly samples were taken by dragging method, dry ice traps and visual search in two transects. Adults and nymphs of Amblyomma cajennense (n= 147), Amblyomma brasiliense (n= 4) and Amblyomma parvum (n= 1) were collected. This is the first occurrence of A. parvum in the state. No correlation was found between the abundance of stages of A. cajennense and rainfall, temperature and relative humidity. The highest abundances of adults were in the months of January and May, and nymphs in September and October. The low diversity of parasites on Curió Park can be attributed to the proximity of households with pets, which would also explain the higher abundance of A. cajennense that is commonly found in areas impacted by anthropogenic pressure.

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Spatial distribution and impact of cattle-raising on ticks in the Pantanal region of Brazil by using the CO2 tick trap

Cited by 42 publications

References 29 publications

Patterns of parasitism by Amblyomma rotundatum (Ixodidae) on Rhinella schneideri (Bufonidae) in islands of São Francisco River, Minas Gerais, Brazil

Patterns of parasitism by Amblyomma rotundatum (Ixodidae) on Rhinella schneideri (Bufonidae) in islands of São Francisco River, Minas Gerais, Brazil

Complementary data on four methods for sampling free-living ticks in the Brazilian Pantanal

Free-living ixodid ticks in an urban Atlantic Forest fragment, state of Rio de Janeiro, Brazil

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