Ultrastructure of the spermatozoon of Taeniarhynchus saginatus (syn. Taenia saginata) (Goeze, 1782) Weinland, 1858 (Cestoda, Taeniidae) an intestinal parasite of human

Bâ, Aïssatou; Bâ, Cheikh Tidiane; Quilichini, Yann; Dieng, T; Marchand, Bernard

doi:10.1007/s00436-010-2125-2

Cited by 5 publications

(3 citation statements)

References 16 publications

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“…In the Cyclophyllidea, the simultaneous presence of a periaxonemal sheath and intracytoplasmic walls is usually linked with the absence of dense granules (Justine 1998) as also observed in other paruterinids (Yoneva et al 2009(Yoneva et al , 2010. Besides the paruterinids, mutual exclusion between these characters, in agreement with Justine (1998), is also reported for the taeniids and metadilepidids, as well as davaineids and inermicapsiferine anoplocephalids (Featherston 1971;Bâ and Marchand 1994a, b, c;Miquel et al 2000Miquel et al , 2009aMiquel et al , 2010Ndiaye et al 2003a;Willms et al 2003Willms et al , 2004Bâ et al 2005aBâ et al , b, 2011Yoneva et al 2006).…”

Section: Discussionsupporting

confidence: 61%

Spermiogenesis and spermatozoon ultrastructure of the paruterinid cestode Notopentorchis sp. (Cyclophyllidea)

et al. 2012

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Ultrastructural characters of the spermiogenesis and mature spermatozoon of Notopentorchis sp. (Cestoda, Cyclophyllidea, Paruterinidae), a parasite from Apus affinis (Aves, Apodiformes, Apodidae) from Gabon, are described by means of transmission electron microscopy. Cytochemical analysis for detection of glycogen was applied. Vestigial striated roots associated with the two centrioles are present in the zone of differentiation. The spermiogenesis is characterized by an external growth of free flagellum followed by a proximodistal fusion of the latter with cytoplasmic protrusion, thus, corresponding to the cestode spermiogenesis of the type III pattern described by Bâ and Marchand (Mem. Mus. Natl. Hist. Nat. 166:87-95, 1995). In the final stage of spermiogenesis, a single crested body appears at the base of the forming spermatozoon. The mature spermatozoon of Notopentorchis sp. is filiform and tapering at both extremities. It consists of five regions differing in their ultrastructural characteristics. The anterior extremity of the mature spermatozoon is characterized by the presence of an apical cone and a single crested body. The cytoplasm contains one axoneme of 9 + "1" type of the trepaxonematan Platyhelminthes, a periaxonemal sheath, a layer of twisted cortical microtubules, transverse intracytoplasmic walls, and granules of glycogen. The nucleus is coiled in spiral around the axoneme. The posterior extremity of the spermatozoon is characterized by the presence of electron-dense material. This structural organization corresponds to the morphology of cestode spermatozoon of type VII as defined by Levron et al. (Biol Rev 85: 523-543, 2010). The comparison of the results with those of the two previous studies on paruterinids suggests that several characters of the spermiogenesis and the mature spermatozoon are invariable, i.e. the type III spermiogenesis and the presence of vestigial striated roots, a single crested body, a periaxonemal sheath, and intracytoplasmic walls. The main differences of the sperm cells among members of this family are the lack of dense granules (as in Triaenorhina rectangula) and the presence of electron-dense material in the posterior extremity of the spermatozoon (as in Notopentorchis sp.).

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Section: Discussionsupporting

confidence: 61%

Spermiogenesis and spermatozoon ultrastructure of the paruterinid cestode Notopentorchis sp. (Cyclophyllidea)

et al. 2012

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“…Thus, sperm cells with two axonemes are present in the orders Diphyllobothriidea, Spathebothriidea, Haplobothriidea, Onchoproteocephalidea, and Trypanorhyncha [21][22][23][46][47][48][49][50][51][52][53][54][55][56][57][58][59][60]. Contrarily, spermatozoa with one axoneme are present in the orders Caryophyllidea, Cyclophyllidea, Lecanicephalidea, Nippotaeniidea, Phyllobothriidea, and Tetrabothiidea [21][22][23][26][27][28][29][30][31][32][61][62][63][64][65][66][67][68][69][70][71][72]. In the order Diphyllidea, there are some discrepancies between the spermiogenesis process and the resulting spermatozoa.…”

Section: Spermatozoonmentioning

confidence: 99%

“…In the Cestoda, there are numerous ultrastructural studies describing spermiogenesis and/or the spermatozoon, particularly in the order Cyclophyllidea [ 23 , 26 , 27 , 28 , 29 , 30 , 31 , 32 ]. However, in the Catenotaeniidae family, ultrastructural aspects of spermiogenesis and/or the spermatozoon have only been studied in two species, namely Catenotaenia pusilla (Goeze, 1782) (Catenotaeniinae Spassky, 1950) and Skrjabinotaenia lobata (Baer, 1925) (Skrjabinotaeniinae) [ 33 , 34 ].…”

Section: Introductionmentioning

confidence: 99%

Spermatological Characterization of the Cestode Meggittina gerbilli (Cyclophyllidea: Catenotaeniidae), a Parasite of Gerbils, Gerbillus gerbillus and Gerbillus campestris (Rodentia: Muridae) in Tunisia

Aouina,

Kacem,

Martín-Carrillo

et al. 2023

Animals

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Ultrastructural characters of spermiogenesis and the mature spermatozoon of the cestode Meggittina gerbilli (Cyclophyllidea: Catenotaeniidae), a parasite of the Lesser Egyptian gerbil (Gerbillus gerbillus) and the North African gerbil (Gerbillus campestris) (Rodentia: Muridae) in the Djebel Dahar (South of Tunisia), were studied using transmission electron microscopy. The spermiogenesis of M. gerbilli is of Bâ and Marchand’s type III, which is mainly characterized by a proximodistal fusion of a single flagellum with a cytoplasmic extension. In this catenotaeniid, the proximal fusion is preceded by a 90° rotation of the flagellum. The spermatozoon is a Levron et al. type VI, which presents a single axoneme with the 9 + ‘1’ trepaxonematan pattern, a periaxonemal sheath, two crest-like bodies, twisted cortical microtubules, and a spiraled nucleus. The obtained results show similarities with the remaining studied catenotaeniids, namely Catenotaenia pusilla and Skrjabinotaenia lobata. The results are compared and discussed according to several characteristics found in the catenotaeniids and other studied cyclophyllideans.

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Spermatological characteristics of the genus Taenia inferred from the ultrastructural study on Taenia hydatigena

et al. 2014

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The present study attempts to establish the sperm ultrastructure baseline for Taenia hydatigena, which is essential for the future research on the location of specific proteins involved in spermatogenesis in this species. Thus, the ultrastructural organisation of the mature spermatozoon is described by means of transmission electron microscopy. Live tapeworms were obtained from an experimentally infected dog in the Department of Pathology and Public Health of the Agronomic and Veterinary Institute Hassan II of Rabat (Morocco). The spermatozoon of T. hydatigena is a filiform cell, which is tapered at both extremities and lacks mitochondria. It exhibits all the characteristics of type VII spermatozoon of tapeworms, namely a single axoneme, a crested body, spiralled cortical microtubules and nucleus, a periaxonemal sheath and intracytoplasmic walls. Other interesting characteristics are the presence of a 2000 nm long apical cone in its anterior extremity and only the axoneme in its posterior extremity. The ultrastructural characters of the spermatozoon of T. hydatigena are compared with those of other cestodes studied to date, with particular emphasis on representatives of the genus Taenia.

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Ultrastructure of the spermatozoon of Taeniarhynchus saginatus (syn. Taenia saginata) (Goeze, 1782) Weinland, 1858 (Cestoda, Taeniidae) an intestinal parasite of human

Cited by 5 publications

References 16 publications

Spermiogenesis and spermatozoon ultrastructure of the paruterinid cestode Notopentorchis sp. (Cyclophyllidea)

Spermiogenesis and spermatozoon ultrastructure of the paruterinid cestode Notopentorchis sp. (Cyclophyllidea)

Spermatological Characterization of the Cestode Meggittina gerbilli (Cyclophyllidea: Catenotaeniidae), a Parasite of Gerbils, Gerbillus gerbillus and Gerbillus campestris (Rodentia: Muridae) in Tunisia

Spermatological characteristics of the genus Taenia inferred from the ultrastructural study on Taenia hydatigena

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