Fine Structure of the Nymphal Integument in the Camel Tick Hyalomma (H) anatolicum anatolicum (Ixoddoidea: Ixodidae)

Bughdadi, Faisal A.

doi:10.4197/sci.20-1.14

Cited by 4 publications

(10 citation statements)

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“…During slow feeding, the epidermal cells increase greatly in size, demonstrating higher mitotic activity and suggesting fast cell proliferation (Amosova 1983;Coons and Alberti 1999). This increase in cell volume was demonstrated in females of H. anatolicum anatolicum ticks (Bughdadi 2008). In R. (Boophilus) microplus and R. (Boophilus) decoloratus, in turn, cells become distinctly columnar in this phase (Beadle 1974).…”

Section: Discussionmentioning

confidence: 77%

“…This differentiation can be seen in the aloscutum of R. sanguineus females, corroborating the results also obtained for nymphs of R. sanguineus (Oliveira et al . ) and Hyalomma (H) anatolicum anatolicum (Bughdadi ), and females of Ixodes ricinus (Dillinger and Kesel ), Rhipicephalus (Boophilus) microplus and Rhipicephalus (Boophilus) decoloratus (Beadle ).…”

Section: Discussionmentioning

confidence: 99%

“…In general, the epidermal cells have a round nucleus, with a small nucleoli and condensed chromatin, with its apical portion full of microvilli and septate junctions in the lateral plasma membrane (Amosova ). In H. anatolicum anatolicum , as in other ixodid and arthropods, cuticular growth is followed by considerable changes in epidermal structure (Bughdadi ). The observed characteristics in fasting R. sanguineus epidermal cells corroborate these results.…”

Section: Discussionmentioning

confidence: 99%

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The extensible integument of Rhipicephalus sanguineus female ticks in different feeding stages: a morphological approach

2014

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Remedio R.N., Nunes P.H. and Camargo-Mathias M.I. 2015. The extensible integument of Rhipicephalus sanguineus female ticks in different feeding stages: A morphological approach. -Acta Zoologica (Stockholm) 96: [319][320][321][322][323][324][325][326][327] Ticks are among the most important pathogen vectors worldwide, and the knowledge of their internal and external morphology may provide relevant information that will allow an adequate control of these animals. In this sense, the integument gains prominence, not only because of its wide capacity of expansion, but also due to the fact that this region is usually the first site of contact with natural and synthetic acaricides. Therefore, this study aimed to describe the morphology of alloscutal integument of R. sanguineus female ticks in three different feeding stages by means of histological and ultramorphological analysis. Significant differences were observed in all stages, with respect to the size of cells and layers, and to cuticle unfolding throughout the feeding process. Cuticle is divided into two main layers, the epicuticle and the procuticle, and is separated from a unistratified epithelium by a subcuticular layer. Procuticle, in turn, is divided into two layers, the endocuticle and exocuticle. Unfed female ticks showed cuticle with numerous folds, which decrease in quantity as the feeding expansion of the whole animal occurs. Opening of dermal glands and presence of setae also differed among groups.

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Section: Discussionmentioning

confidence: 77%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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The extensible integument of Rhipicephalus sanguineus female ticks in different feeding stages: a morphological approach

2014

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“…Ticks are arthropods whose integument (structure that covers the body protects the individual against mechanical shocks and excessive water loss) presents deep and extensible folds. Such extensibility allows the integument to unfold during the feeding process to accommodate a full and enlarged digestive tube, and, in the females, accommodate a developed ovary, composed of oocytes in different developmental stages (Arnosti et al, ; Bughdadi, ; Oliveira, Bechara, Morales, & Camargo‐Mathias, ; Remedio, Nunes, & Camargo‐Mathias, ; Sampieri et al, ).…”

Section: Introductionmentioning

confidence: 99%

“…integument to unfold during the feeding process to accommodate a full and enlarged digestive tube, and, in the females, accommodate a developed ovary, composed of oocytes in different developmental stages (Arnosti et al, 2011;Bughdadi, 2008;Oliveira, Bechara, Morales, & Camargo-Mathias, 2009;Remedio, Nunes, & Camargo-Mathias, 2014a;Sampieri et al, 2013).…”

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confidence: 99%

The effects of neem oil (Azadirachta indica A. JUSS) enriched with different concentrations of azadirachtin on the integument of semi‐engorged Rhipicephalus sanguineus sensu lato (Acari: Ixodidae) females

Souza

Remédio

Arnosti

et al. 2017

Microscopy Res & Technique

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Several studies searching for methods to control Rhipicephalus sanguineus s.l., (dog tick) infestations have been developed aiming to minimize the damages caused by these ectoparasites to the hosts and the environment, which is harmed by the indiscriminate use of toxic acaricide products. In this scenario, neem oil has been used as a natural alternative against ticks, once this chemical has repellent properties and interferes in the growth regulation of these ectoparasites, inhibiting ecdysis. The present study evaluated the effects of azadirachtin-enriched neem oil on the integument of semi-engorged R.sanguineus s.l., females through morphohistological techniques. The results showed the occurrence of significant morphological and histochemical alterations, mainly in the females exposed to higher concentrations, which demonstrates the dose-dependent action of the chemical. A decrease in the cuticle thickness was observed, as well as a modification in the distribution of the epithelial cells, which displayed pyknotic and fragmented nuclei, and intensely vacuolated cytoplasm, indicating that these cells would be undergoing death processes. These morphological alterations observed in the integument of the females exposed to the azadirachtin-enriched neem oil encourage the use of this chemical as a strategy to control these ectoparasites.

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Ultrastructural Study During Feeding and Mating on the Genital System in Female Tick Hyalomma (Hyalomma) anatolicum anatolicum (Ixodoidea: Ixodidae)

Bughdadi¹

2011

Journal of King Abdulaziz University-Science

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The fine structure of genital system in the female Hyalomma (Hyalomma) anatolicum anatolicum is described during feeding and mating. Feeding initiates oocytes growth through the previtellogenic. Oogenesis is induced by feeding . Growing oocytes secreate dense granules into the cytoplasm and form surface microvilli. The cytoplasm has associated dense vesicles, Golgi bodies, rough endoplasmic reticulum and multivesicular bodies.The vagina, consisting of vestibular (VV) and cervical (CV) regions, is formed of an epithelium lined internally with a folded cuticular layer and surrounded externally by muscle layers. These facilitate the passage of endospermatophres containing sperms into the receptaculum seminis (RS), and ova to the exterior. A pair of tubular accessory glands (AG) opening at the junction of VV and CV consist of an epithelial layer of undifferentiated cells. As feeding progresses, these cells synthesise their granular secretion that functions to lubricate the egg surface during its passage through VV. The receptaculum seminis consists of cuboidal cells lined with a cuticular layer. These cells appear rich with glycogen and lipid vacuoles, may act as source of energy required for various cell activities including granule synthesis and exocytosis. The granules discharge their contents into intercellular spaces distributed throughout the wall of the receptaculum seminis, and communicate with the main lumen via narrow channels. No secretory activity has been observed during and after feeding in the connecting tube. At and during final stage of feeding, the cell cytoplasm contains large, phagosomal vacuoles penetrated by sperms, in addition to micropinocytotic vesicles which serve to break down the seminal fluid and other material. The oviducal secretion may function as a tanning agent to harden the egg shell and also probably act as a lubricant at the state of egg passage. In addition, the basal membrane is infolded giving characteristic features of epithelia involved in ion water transport.

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Fine Structure of the Nymphal Integument in the Camel Tick Hyalomma (H) anatolicum anatolicum (Ixoddoidea: Ixodidae)

Cited by 4 publications

References 2 publications

The extensible integument of Rhipicephalus sanguineus female ticks in different feeding stages: a morphological approach

The extensible integument of Rhipicephalus sanguineus female ticks in different feeding stages: a morphological approach

The effects of neem oil (Azadirachta indica A. JUSS) enriched with different concentrations of azadirachtin on the integument of semi‐engorged Rhipicephalus sanguineus sensu lato (Acari: Ixodidae) females

Ultrastructural Study During Feeding and Mating on the Genital System in Female Tick Hyalomma (Hyalomma) anatolicum anatolicum (Ixodoidea: Ixodidae)

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