Infestação experimental de equinos por Rhipicephalus (Boophilus) microplus

Franque, Marcos Pinheiro; Santos, Huarrisson Azevedo; Linarez, Franklin Federico Mujica; Massard, Carlos Luiz

doi:10.1590/s0103-84782009000700025

Cited by 5 publications

(9 citation statements)

References 18 publications

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“…(B.) microplus on the horse in this study was 33 days, corroborating the studies performed by Bittencourt [ 25 ] and Franque et al [ 22 ], who observed 28 to 38 days of parasitic phase. In its preferred host, cattle, the onset of the shedding of engorged females occurs between 19 and 21 days [ 26 ]; however, males could stay on the host for up to 60 days, which was also observed in this study.…”

Section: Discussionsupporting

confidence: 93%

“…Rhipicephalus (Boophilus) microplus is one of the leading health problems for livestock in many countries, including Brazil. The main hosts are cattle, but it can occasionally parasitize sheep, deer, horses, buffaloes, pigs, goats, dogs [ 19 , 20 , 21 , 22 ], and even man [ 23 ]. Its pathogenic effects can be classified as direct by the action of hematophagy in all the stages of tick development and indirect by the transmission of pathogens, such as Babesia spp.…”

Section: Discussionmentioning

confidence: 99%

“…(B.) microplus , and, in that case, ticks take more time to complete their life cycle in equines; the recuperation load of tick specimens is low and smaller than ticks recovered from bovines [ 22 ]. The percentage of positivity observed in the present study for T. equi in whole tick samples was always higher than 90% in all the stages of development of R.…”

Section: Discussionmentioning

confidence: 99%

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Dynamics of Theileria equi Infection in Rhipicephalus (Boophilus) microplus during the Parasitic Phase in a Chronically Infected Horse

et al. 2022

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Experimental studies have demonstrated that Rhipicephalus (Boophilus) microplus transmits Theileria equi to horses. However, the degree and dynamics of this protozoan infection in the vector’s organism have not been fully elucidated. Therefore, this study aimed to evaluate the infection rate and parasitic load of T. equi in R. (B.) microplus, the infection dynamics in this arthropod during experimental infestation in a horse chronically infected with T. equi, and to evaluate the trans-stadial and intrastadial transmission competence of T. equi by R. (B.) microplus. The experimental infestation period of R. (B.) microplus on the horse was 33 days, but males were found on the animal up to 60 days post-infestation. After the fifth day post-infestation, ticks and equine blood were collected every two days. Whole ticks from the same developmental stage collected in the same day were pooled. Adult ticks were dissected to extract salivary glands and gut. DNA extraction was performed for all the samples, and they were then submitted to qPCRs for T. equi diagnosis. Freshly molted nymphs collected as larvae in the horse and freshly molted males and females collected as nymphs in the horse showed equal to or greater than 75% positivity for T. equi, indicating a strong possibility of trans-stadial transmission. The longest permanence of the male ticks on the horse associated with the high positivity rate of this type of sample for T. equi indicate that the male may play a role in the intrastadial transmission of T. equi to infection-free horses. The salivary glands displayed 77.78% positivity for T. equi and presented a higher infection rate at the end of the experimental period (100% from 29 to 33 days post-infection). This study shows that R. (B.) microplus has high T. equi infection rates and that the infection rate and parasitic load increased over the experimental period. These findings confirm the importance of chronically infected horses with T. equi as a source of infection for R. (B.) microplus.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Dynamics of Theileria equi Infection in Rhipicephalus (Boophilus) microplus during the Parasitic Phase in a Chronically Infected Horse

et al. 2022

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“…Studies have been conducted to analyze the attachment and feeding of R. microplus on alternative hosts such as horses (Franque et al, 2009), sheep (Ma et al, 2016), goats (Daemon et al, 1998;Nyangiwe & Horak, 2007), rabbits (Amaral et al, 2012;Silva et al, 1996) and dogs (Franque et al, 2007). All these species allowed the development of the parasitic cycle of these Ixodids to a certain degree, although the results were variable and depended on the host-parasite relationship.…”

Section: Discussionmentioning

confidence: 99%

“…R. microplus prefers to feed off cattle, although other animals can serve as occasional hosts for this species (Szabó et al, 2003). Several studies describe the infestation of R. microplus and aspects of its biology in alternative host species such as buffalo (Benitez et al, 2012;Obregón et al, 2010), horse (Franque et al, 2009;Rodríguez et al, 2009), llama (Aguirre et al, 2000), goat (Daemon et al, 1998;Nyangiwe & Horak, 2007), deer (Barré et al, 2002), sheep (Ma et al, 2016), dog (Franque et al, 2007), and rabbit (Amaral et al, 2012;Ma et al, 2016;Silva et al, 1996). These alternative hosts are a valuable option to accelerate the identification of novel molecules for tick control and to evaluate the efficacy of novel vaccine candidates against cattle ticks.…”

Section: Introductionmentioning

confidence: 99%

Infestation of rabbits with just-molted adults of the cattle tick Rhipicephalus microplus: biological parameters and efficiency

Vargas-Hernández

Montero-Espinosa

Sánchez-Villaurrutia

et al. 2023

Rev. Bras. Parasitol. Vet.

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In this study, we report for the first time the successful infestation of rabbits with just-molted, unfed adults of Rhipicephalus microplus. Six New Zealand White rabbits were experimentally infested with 20 female and 20 male unfed adult ticks released into plastic chambers fixed on the shaved backs of each host. The attachment and feeding processes were successful. The biological characteristics of the ticks and the occurrence of adverse events in the tick-attachment area were studied. The average engorgement period was 10.7 days, and 33.3% of the engorged females completed the parasitic phase. The average weight of the recovered engorged females was 149.8 mg, with an average egg mass weight of 70.9 mg, a conversion efficiency index of 47.3%, and a hatching percentage of 88.31%. The adverse reactions found in the tick-attachment area were the usual inflammatory responses of the organism to infestation by these ectoparasites; however, it did not prevent the ticks from feeding and completing their life cycle. These data indicate that the infestation of rabbits with just-molted, unfed adult ticks could be a valuable, alternative animal model for rapid and economical evaluation of vaccine candidates and new molecules with acaricidal activity against Rhipicephalus microplus.

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High infestation by Rhipicephalus (Boophilus) microplus in a mare: a rare case report

et al. 2013

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Infestação experimental de equinos por Rhipicephalus (Boophilus) microplus

Abstract: This study describes biological characteristics of

Cited by 5 publications

References 18 publications

Dynamics of Theileria equi Infection in Rhipicephalus (Boophilus) microplus during the Parasitic Phase in a Chronically Infected Horse

Dynamics of Theileria equi Infection in Rhipicephalus (Boophilus) microplus during the Parasitic Phase in a Chronically Infected Horse

Infestation of rabbits with just-molted adults of the cattle tick Rhipicephalus microplus: biological parameters and efficiency

High infestation by Rhipicephalus (Boophilus) microplus in a mare: a rare case report

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