The sex ratio of Amblyomma cajennense (Acari: Ixodidae) with notes on the male feeding period in the laboratory

Pintér, Adriano; Labruna, Marcelo Bahia; Faccini, João Luíz Horácio

doi:10.1016/s0304-4017(01)00650-1

Cited by 53 publications

(33 citation statements)

References 13 publications

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“…The ticks collected during the nymph stage were identified by means of the dichotomous key of Martins et al (2010), and then were stored in flasks containing alcohol (70GL). Some of the larvae that were collected were placed on domestic rabbits, as an experimental infestation, in order to complete the tick lifecycle, as described by Pinter et al (2002). The larvae that were not fixed on domestic rabbits were put in a B.O.D.…”

Section: Methodsmentioning

confidence: 99%

Ticks on birds caught on the campus of the Federal Rural University of Rio de Janeiro, Brazil

Santolin

Luz

Alchorne

et al. 2012

Rev. Bras. Parasitol. Vet.

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The prevalence of parasitic infections, particularly those caused by ectoparasites, may influence the biology and ecology of wild birds. The aim of this study was to investigate occurrences and identify the species of ticks collected from wild birds caught on the campus of the Federal Rural University of Rio de Janeiro. The birds were caught using mist nets between October 2009 and December 2010. In total, 223 birds were caught, represented by 53 species and 19 families in nine orders. Nineteen birds (n = 7 species) were parasitized by immature ticks (prevalence of 8.5%). Forty-four ticks were collected, of which 23 were nymphs and 21 were larvae. There were associations between parasitism by ticks and non-Passeriformes birds, and between parasitism and ground-dwelling birds, which was possibly due to the presence (or inclusion among the captured birds) of Vanellus chilensis (Charadriiformes: Charadriidae). All the nymphs collected were identified as Amblyomma cajennense. In general terms, we must emphasize that wild birds in the study area may play the role of dispersers for the immature stages of A. cajennense, albeit non-preferentially.

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Section: Methodsmentioning

confidence: 99%

Ticks on birds caught on the campus of the Federal Rural University of Rio de Janeiro, Brazil

Santolin

Luz

Alchorne

et al. 2012

Rev. Bras. Parasitol. Vet.

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“…Larval offspring from each of the three females were reared separately in the laboratory until they reached adult stage. For these purposes, each active stage (larvae, nymphs or adults) derived from each of the three females was allowed to feed on a ticknaïve rabbit, as previously described (Pinter et al, 2002;Horta et al, 2009). Engorged larvae and nymphs were held for moulting inside the incubator cited above.…”

Section: Maintenance Of Rickettsia-infected Ticks In the Laboratorymentioning

confidence: 99%

Rickettsial infections of dogs, horses and ticks in Juiz de Fora, southeastern Brazil, and isolation of Rickettsia rickettsii from Rhipicephalus sanguineus ticks

Pacheco

Moraes‐Filho

Guedes

et al. 2010

Medical and Veterinary Entomology

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Abstract. The present study was performed in an area endemic for Brazilian spotted fever (BSF) in Juiz de Fora, state of Minas Gerais, Brazil, during the years 2007 and 2008, when fatal cases of BSF (caused by Rickettsia rickettsii ) were reported. Adult ticks (Acari: Ixodidae) identified as Rhipicephalus sanguineus (Latreille) and Amblyomma cajennense (Fabricius) were collected from dogs and horses, respectively, and tested by polymerase chain reaction (PCR). Overall, 13.1% of the Rh. sanguineus ticks and none of the A. cajennense were found to be infected with R. rickettsii. Two isolates of R. rickettsii were successfully established in Vero cell culture from two Rh. sanguineus ticks. An indirect immunofluorescence assay (IFA) using R. rickettsii antigens detected blood serological reaction to R. rickettsii in 67.9% (53/78) of dogs and 41.0% (16/39) of horses living in the study area. Larval offspring from two Rh. sanguineus engorged females, naturally infected by R. rickettsii, were reared to adult stage in the laboratory. All active stages (larvae, nymphs, adults) remained 100% infected by R. rickettsii, which was efficiently transmitted to naïve rabbits. Overall, the results of the present study indicate a potential risk for transmission of R. rickettsii to humans by Rh. sanguineus, an occurrence yet to be documented in Brazil.

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“…Following a modification of the technique described by Pinter et al (2002), fur was removed from the lumbar sacral region of the experimental animals, that received a rectangular feeding chamber (7 x 8cm) fixed 1 to the shaved skin. In each infestation, 10 females and seven males were inoculated per animal inside the feeding chamber.…”

Section: Methodsmentioning

confidence: 99%

Biological parameters of larvae, nymphs, and engorged females of Amblyomma cajennense (Fabricius, 1787) (Acari: Ixodidae) obtained from artificial and successive infestations on Oryctolagus cuniculus (Linnaeus, 1758) (Lagomorpha: Ochotonidae)

Freitas¹,

Leite²,

Oliveira³

et al. 2009

Arq. Bras. Med. Vet. Zootec.

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The development of acquired resistance to Amblyomma cajennense ticks was evaluated. A total of 18 rabbits were uniformly distributed into three groups named GL, GN, and GA that were submitted to three consecutive infestations with, respectively, larvae, nymphs, and adults of A. cajennense. After the infestations, the parasitic and reproductive parameters of recovered instars were evaluated. A significant reduction of recovery rates of inoculated ticks was observed only after the third infestation of animals in groups GL and GN (P<0.01). The modal day for drop-off of engorged larvae and nymphs increased along the infestations. The recovered engorged nymphs presented a significant reduction of the mean body weight between the first and the third infestations (P<0.01). A significant reduction in the mean recovery rate of engorged females was only observed during the third infestation. However, significant reductions (P<0.05) in body weight, egg mass weight, and larva eclosions were observed for recovered engorged females after the second infestation onwards. The results suggest the occurrence of resistance of rabbits to A. cajennense infestations, being more evident against the adult stage.Keywords: tick, Ixodide, resistance, immunity, infestation (P<0,01) RESUMO Avaliou-se o desenvolvimento de resistência adquirida frente ao parasitismo por Amblyomma cajennense. Para tanto, 18 coelhos foram uniformemente distribuídos em três grupos denominados GL, GN e GA e submetidos a três infestações consecutivas por, respectivamente, larvas, ninfas ou adultos de A. cajennense. Após a infestação, estudaram-se os parâmetros parasitários e reprodutivos dos exemplares recuperados. Apenas a partir da terceira infestação dos animais dos grupos GL e GN, pôde-se observar uma queda significativa na taxa de recuperação dos ixodídeos inoculados (P<0,01). O dia modal de queda das larvas e ninfas recuperadas aumentou com o decorrer das infestações. As ninfas ingurgitadas recuperadas apresentaram uma redução significativa

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The sex ratio of Amblyomma cajennense (Acari: Ixodidae) with notes on the male feeding period in the laboratory

Cited by 53 publications

References 13 publications

Ticks on birds caught on the campus of the Federal Rural University of Rio de Janeiro, Brazil

Ticks on birds caught on the campus of the Federal Rural University of Rio de Janeiro, Brazil

Rickettsial infections of dogs, horses and ticks in Juiz de Fora, southeastern Brazil, and isolation of Rickettsia rickettsii from Rhipicephalus sanguineus ticks

Biological parameters of larvae, nymphs, and engorged females of Amblyomma cajennense (Fabricius, 1787) (Acari: Ixodidae) obtained from artificial and successive infestations on Oryctolagus cuniculus (Linnaeus, 1758) (Lagomorpha: Ochotonidae)

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