Diferenças na resistência adquirida de cães, hamsters e cobaias a infestações repetidas por carrapatos Rhipicephalus sanguineus (Acari:Ixodidae) adultos

Szabó, Matias Pablo Juán; Mukai, Luciana S.; Rosa, P. C. S.; Bechara, Gervásio Henrique

doi:10.11606/issn.1678-4456.bjvras.1994.52089

Cited by 49 publications

(3 citation statements)

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“…For example, some host species or lineages are resistant to Rhipicephalus sanguineus infestation, by developing a cellular immune response predominantly of basophils, whereas in less resistant hosts neutrophils and eosinophils prevail and Table 1 Host species, total number of each host species in parentheses, prevalence (P) and mean abundance (MA) for larvae (LL) and nymphs (NN) of Amblyomma tigrinum and Amblyomma triste of all trapping year and differentiated in the period of high (period H) and low (period L) tick prevalence are shown. higher burdens of ticks are found on them than in the former (Szabó et al, 1995;Ferreira et al, 2003;Veronez et al, 2010). Variation of grooming habits across species could be another factor influencing the asymmetric tick burdens found, grooming being a way of reducing burdens of immature ticks documented on rodents (Shaw et al, 2003) and other mammal species (Mooring et al, 1996).…”

Section: Discussionmentioning

confidence: 99%

Tick host specificity: An analysis based on host phylogeny and tick ecological features using Amblyomma triste and Amblyomma tigrinum immature stages

Colombo

Fasano

Beldoménico

et al. 2018

Ticks and Tick-borne Diseases

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Section: Discussionmentioning

confidence: 99%

Tick host specificity: An analysis based on host phylogeny and tick ecological features using Amblyomma triste and Amblyomma tigrinum immature stages

Colombo

Fasano

Beldoménico

et al. 2018

Ticks and Tick-borne Diseases

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“…After 30 days, the females were weighed before oviposition, and the egg mass and hatching percentages were evaluated. The latter were obtained through visual evaluation of hatched larva performed by three people, according to Szabó et al (1995). The e cacy of each treatment was veri ed through the analysis of the following parameters: EPI (egg production index) = (egg mass weight/ female weight before laying) × 100; FR (fecundity rate) = (EPI x HR)/100; REI (reproduction e ciency index) = (egg mass weight/ female weight before laying) × hatching percentage x 20,000; %Rovip (percentage of oviposition reduction) = [(EWcontrol-EWtreatment)/EWcontrol] x 100; %Rhatch (hatching reduction) = [(HRcontrol -HRtreatment)/HRcontrol] x 100; C (E cacy of treatment) = (REI control − REI treated)/REI control × 100.…”

Section: Bioassay (Adult Immersion Test -Ati)mentioning

confidence: 99%

Rhipicephalus sanguineus sensu lato exposed to a dichloromethane Acmella oleracea extract: Acaricide activity and morphophysiological evaluations

Oliveira,

Monteiro,

Rocha

et al. 2023

Preprint

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The present study verified the efficacy of a dichloromethane Acmella oleracea (L.) R. K. Jansen extract against semi-engorged R. sanguineus s. l. female ticks and the effects of different concentrations on the germ cells and midgut epithelium of these ectoparasites through morphological and histological analyses. In vitro bioassays were performed (adult immersion test). For the cytotoxic evaluations, the semi-engorged females were allocated into five groups. The findings indicate that the dichloromethane A. oleracea extract was highly efficient against semi-engorged R. sanguineus s. l. females at concentrations higher than 10 mg/mL. The best results were obtained at 25 mg/mL, with an efficacy rate of 95%. The cytotoxic tests indicate that assessed the A. oleracea extract caused extensive damages to germ cells and the midgut epithelium of R. sanguineus s. l. ticks. The treatment affected the fertility of these ectoparasites, reducing their capacity to produce viable eggs and form the embryo and, consequently, to develop new individuals. Additionally, the treatment with the extract fraction affected the ectoparasites’ nutrition, which could delay or impair their development, consequently decreasing their mobility to find a suitable host and preventing them from completing their life cycle and moving to the following instar. Thus, the dichloromethane A. oleracea extract is a promising and viable alternative to control R. sanguineus s. l. ticks

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“…Partially or fully engorged female ticks were selected for this study. The selected female R. sanguineus s. l. [6] and S z a b ó, et al [28].…”

Section: Oviposition In R Sanguineus S L Under Natural and Laboratory...mentioning

confidence: 99%

Observations on Some Biological Characteristics of Rhipicephalus sanguineus Sensu Lato (Acari: Ixodidae) Under Natural and Laboratory Conditions in Nigeria

Kamani

2022

Folia Veterinaria

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The brown dog tick, Rhipicephalus sanguineus sensu lato (s. l.) is a globally distributed tick of medical and veterinary significance. This study reports some observations on the biological characteristic of the brown dog ticks kept under natural and laboratory conditions in Nigeria. Variation in biological parameters was observed within the Nigerian R. sanguineus s. l. population kept under various conditions. A higher number of R. sanguineus exhibited the type 1 oviposition pattern than the type 2 pattern. The type 1 pattern was observed in 84.2 % and 80 % of R. sanguineus s. l. reared under laboratory and natural conditions, respectively. The pre-oviposition period was significantly shorter in ticks maintained under laboratory conditions than under natural conditions. Similarly, ticks kept under laboratory conditions laid significantly more eggs with higher egg mass weight than ticks kept under natural conditions. Furthermore, the incubation period and the total weight loss by female ticks throughout the oviposition period differed significantly between the two groups (P < 0.05). The engorged R. sanguineus s. l. females kept at 4 °C survived for up to 21 days and remained viable producing fertile eggs. Egg of R. sanguineus s. l. kept at 4 °C for up to 63 days retain viability and were able to hatch to larvae after variable incubation periods when returned to ambient temperatures depending on the duration of storage at 4 °C. The results showed that the tropical lineage of the brown dog tick can survive and remain fecund at low temperatures, suggesting that it can be translocated and established in temperate regions.

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Diferenças na resistência adquirida de cães, hamsters e cobaias a infestações repetidas por carrapatos Rhipicephalus sanguineus (Acari:Ixodidae) adultos

Cited by 49 publications

References 0 publications

Tick host specificity: An analysis based on host phylogeny and tick ecological features using Amblyomma triste and Amblyomma tigrinum immature stages

Tick host specificity: An analysis based on host phylogeny and tick ecological features using Amblyomma triste and Amblyomma tigrinum immature stages

Rhipicephalus sanguineus sensu lato exposed to a dichloromethane Acmella oleracea extract: Acaricide activity and morphophysiological evaluations

Observations on Some Biological Characteristics of Rhipicephalus sanguineus Sensu Lato (Acari: Ixodidae) Under Natural and Laboratory Conditions in Nigeria

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