Ovary and oocyte maturation of the tick Amblyomma brasiliense Aragão, 1908 (Acari: Ixodidae)

Sanches, Gustavo Seron; Bechara, Gervásio Henrique; Camargo‐Mathias, Maria Izabel

doi:10.1016/j.micron.2009.08.008

Cited by 20 publications

(12 citation statements)

References 7 publications

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“…The ovary of Rhipicephalus (Boophilus) annulatus consisted of a horseshoe shaped single continuous tubular structure located at the posterior third of the body. Similar observations were reported in Dermacentor andersoni, D. variabilis [ 20 ], Amblyomma cajennense [ 6 ], A. braziliense [ 10 ], and Rhipicephalus sanguineus [ 7 ]. The wall of adult tick ovary consisted of central lumen lined by small epithelial cells interspersed by oocytes in different developmental stages ( Figure 1(a) ).…”

Section: Resultssupporting

confidence: 85%

“…The following characteristics were used for classification of the oocytes, namely, size and shape, presence/absence of germ vesicle, cytoplasmic appearance, presence or absence of yolk granules, and presence of chorion [ 6 , 8 – 10 ].…”

Section: Methodsmentioning

confidence: 99%

“…For the development of newer drugs which target their reproductive system, a thorough understanding of the structure of the ovaries is highly essential. The structure of reproductive system of Amblyomma cajennense [ 6 ], Rhipicephalus sanguineus [ 7 ], Amblyomma triste [ 8 ], Boophilus microplus [ 9 ], and Amblyomma braziliense [ 10 ] was documented previously in detail.…”

Section: Introductionmentioning

confidence: 99%

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Histoarchitecture of the Ovary of Rhipicephalus (Boophilus) annulatus during Pre‐ and Postengorgement Period

Sreelekha

Chandrasekhar

Jyothimol

et al. 2015

The Scientific World Journal

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The present communication describes the detailed day wise study of histological changes of the ovary of Rhipicephalus (Boophilus) annulatus in the postengorgement period together with the systematic classification of their oocytes. The ovary of R. (B.) annulatus is panoistic type with an asynchronous development of oocytes. All the stages (II, III, IV, and V) of oocytes except stage I were similar to R. (B.) microplus. The stage I oocytes showed basophilia, which was not reported earlier in other species of ticks. Day wise changes were in the form of presence of oogonia in partially fed and day one engorged adults, considerable degeneration of oocytes on day two, emergence of new wave of oocytes on day three, presence of mature oocytes up to day eight, and complete degeneration of ovarian tissue from day eight onwards. The degenerative changes in the ovary appeared initially in the oocytes followed by germinal epithelium.

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Section: Resultssupporting

confidence: 85%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Histoarchitecture of the Ovary of Rhipicephalus (Boophilus) annulatus during Pre‐ and Postengorgement Period

Sreelekha

Chandrasekhar

Jyothimol

et al. 2015

The Scientific World Journal

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“…D. nuttalli (Olenev, 1928) хачгийг бэлчээрийн хачиг гэх бөгөөд малчид эрэгчин хачгийг цоохор нуруут, эмэгчин хачгийг алтан сэрвээт, эсвэл алтан толгойт хэмээн нэрлэдэг (Болдбаатар, Бямбаа, 2016б). Цус сорогч хачгийн өндгөвчний хэлбэр, ооцитын хөгжил, хэлбэр зүйн онцлогийн судалгаанууд Dermacentor andersoni, D. variabilis (Sonenshine, 1991), Amblyomma rotundatum (Sanches et al, 2012), A. cajennense (Denardi et al, 2004), A. triste (Olivera et al, 2006), A. brasiliense (Sanches et al, 2010), A. varium (Sanches et al, 2014), Rhipicephalus (Boophilus) microplus (Saito et al, 2005), R. sanguineus (Oliveira et al, 2005), Haemaphysalis longicornis (Mihara et al, 2018) хачгуудад судлагдсан байдаг. D. nuttalli хачиг нь туларемиа, ку-чичрэг, хачгийн риккетсиоз, хачигт энцефалит, адуу, үхрийн бабезиоз, хонины анаплазмозын үүсгэгчийн дамжуулагч вектор болдог (Бямбаа, 1994;Battsetseg et al, 2001Battsetseg et al, , 2002Болдбаатар, Бямбаа, 2016).…”

Section: оршилunclassified

“…З.Үүрцайх ба бусад (2018) ХАА-н шинжлэх үхаан сэтгүүл №25 (03):[15][16][17][18][19][20][21][22][23][24] …”

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development of oocytes of a dermacentor nuttalli tick

Uurtsaikh

Uranbileg

Jargalan

et al. 2018

Mong. J. Agric. Sci.

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Gold-headed tick, Dermacentor nuttalli is widely distributed in Mongolia and an important vector of transovarially transmitting pathogens to domestic animals. In this study, we describe the morphology of the ovary, as well as the process of the vitellogenesis and ovigenesis on oocytes of the tick, Dermacentor nuttalli. The oocytes were classified into stages that varied from I to V, according to: cytoplasm appearance, presence of the germ vesicle, position, development, presence of yolk granules, accumulation and presence of chorion. To our knowledge, this study is first description on oocytes development stages evaluated by Balashov (1964) of D. nuttalli female and its vitellogenesis. Dermacentor nuttalli хачгийн ооцитын хөгжил Хураангуй: Цус бүрэн сорж, эвцэлдэж хувалзалсан Dermacentor nuttalli эмэгчин хачгийн ооцит, өндөгний хөгжлийг судалснаар хачгийн физиологи, биологийн онцлогийг тогтоох нь шинжлэх ухаан, онол, практикийн өндөр ач холбогдолтой юм. Энэ судалгаагаар D. nuttalli хачгийн ооцитын вителлогенез, овигенез, өндгөвчний хэлбэр зүйн хувирлыг судлан тогтоолоо. Хөгжлийн янз бүрийн шатаар хөгжиж буй ооцитуудыг цитоплазмын илрэл, герминал мөхлөгт цэврүүнцрийн илрэл, байрлал, хөгжил, уургийн мөхлөгүүдийн илрэл, хуримтлагдалт, цэлмэнт бүрхүүлийн үүсэл, хөгжлийн явцаар нь 5 шат болгон ангилав (I-V). Энэхүү судалгаа нь D. nuttalli хачгийн ооцитын хөгжлийг Ю.С.Балашов (1964)-ын үнэлгээгээр үнэлж, хөгжлийн үе шатуудыг тогтоосон анхны судалгаа юм. Түлхүүр үг: Өндгөвч, овигенез, Балашовын ангилал, вителлогенез

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Cytotoxic effects of andiroba oil (Carapa guianensis) in reproductive system of Rhipicephalus sanguineus (Latreille, 1806) (Acari: Ixodidae) semi-engorged females

et al. 2012

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The present study performed an analysis about the effects of andiroba seed oil (Carapa guianensis) in the ovary of Rhipicephalus sanguineus semi-engorged females; once, there are few studies about the action of natural products on the reproductive system, a vital organ for the biological success of this animal group. The results showed that andiroba oil is a potent natural agent which causes significant structural changes in the oocytes, such as the emergence of large vacuolated cytoplasmic regions, reduction in the number of yolk granules, changes in the shape of the cells, as well as impairment of genetic material. In addition, the ovary epithelium showed severe morphological changes, such as extreme structural disorganization, with highly vacuolated cells and picnotic nuclei, forming an amorphous mass. This study showed also that oocytes (mainly in the initial stages of development) and the ovary epithelium of R. sanguineus females subjected to different concentrations of andiroba oil presented morphological changes which became more numerous and intense as the concentration of the product increased. Based on the results, it can be inferred that although the defense mechanisms are developed by oocytes to recover the cellular integrity (presence of autophagic vacuoles), these cells are not able to revert the damage caused by this product. Thus, it can be concluded that although the damages caused to the oocytes by andiroba oil are comparatively less severe than the ones caused by synthetic acaricides, this product can be considered a potent natural agent that reduce and/or prevent the reproduction of R. sanguineus females, with the advantage of not causing environmental impact such as synthetic chemical acaricides.

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Ovary and oocyte maturation of the tick Amblyomma brasiliense Aragão, 1908 (Acari: Ixodidae)

Cited by 20 publications

References 7 publications

Histoarchitecture of the Ovary of Rhipicephalus (Boophilus) annulatus during Pre‐ and Postengorgement Period

Histoarchitecture of the Ovary of Rhipicephalus (Boophilus) annulatus during Pre‐ and Postengorgement Period

development of oocytes of a dermacentor nuttalli tick

Cytotoxic effects of andiroba oil (Carapa guianensis) in reproductive system of Rhipicephalus sanguineus (Latreille, 1806) (Acari: Ixodidae) semi-engorged females

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