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1

Fertilization in the cestode Echinococcus multilocularis (Cyclophyllidea, Taeniidae)

100%
Swiderski Z., Miquel J., Azzouz-Maache S., Petavy A.-F.
Acta Parasitologica
|
2016
|
tom 61
|
nr 1
2

Ultrastructure of spermatogenesis of Taenia taeniaeformis [Batsch, 1786] [Cestoda, Cyclophyllidea, Taeniidae] and comparison of spermatological characters in the family Taeniidae Ludwig, 1886

84%
Miquel J., Swiderski Z., Foronda P., Torres J., Feliu C.
Acta Parasitologica
|
2009
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tom 54
|
nr 3
230-243
The ultrastructure of spermatogenesis of Taenia taeniaeformis is described for the first time by means of transmission electron microscopy (TEM). Mature testes contain all stages of spermatogenesis; primary spermatogonia are usually situated at the periphery and mature spermatozoa in the centre of testes. The general process is similar to that described in other cestodes. Six incomplete, synchronic cytokineses occur: four mitotic and two meiotic cell divisions. All these divisions occur simultaneously, resulting in a rosette cluster of four tertiary spermatogonia, then eight quaternary spermatogonia, and subsequently sixteen primary spermatocytes. All of these enter into a growth period and their enlarged nuclei move to the periphery of cells of the rosettes. The first meiotic division forms thirty-two secondary spermatocytes and after the second meiotic division, there are sixty-four spermatids. Spermiogenesis in T. taeniaeformis corresponds to the Ba and Marchand’s Type 3 and begins with the formation of a differentiation zone in the form of a conical projection of cytoplasm delimited by a ring of arching membranes and surrounded by submembranous cortical microtubules. Within this area, there are two centrioles, orthogonally disposed, and vestigial striated rootlets. Only one of the centrioles develops a flagellum that grows externally to the cytoplasmic extension. Posteriorly, a flagellar rotation inferior to 90° occurs and the flagellum becomes parallel to the cytoplasmic extension. Later, the two processes fuse during the so-called proximodistal fusion. The nucleus elongates and moves into the cytoplasmic extension. In the final stage of spermiogenesis, a single crested body appears at the base of the differentiating spermatozoon. Finally, the ring of arching membranes constricts and the young spermatozoon detaches from the residual cytoplasm. Ultrastructural aspects of spermatogenesis are compared with that of other cestodes studied to date, particularly of the family Taeniidae.
3

Post-embryonic development and ultrastructural characteristics of the polycephalic larva of Taenia parva Baer, 1926 [Cyclophyllidea, Taeniidae]

84%
Swiderski Z., Miquel J., Mlocicki D., Georgiev B. B., Eira C., Grytner-Ziecina B., Feliu C.
Acta Parasitologica
|
2007
|
tom 52
|
nr 1
Post-embryonic development and fully-formed polycephalic larvae of Taenia parva Baer, 1926 were examined by light (LM) and transmission electron microscopy (TEM). Three developmental stages were recognised: (1) an early stage of exogenous budding at the surface of the central vesicle; (2) a stage of polycephalic cyst development accompanied by segmentation of the growing larval strobile and an obvious decrease in the size of the central vesicle; (3) fully-formed larval strobile and invaginated scoleces. In fully-developed encysted polycephalic larvae, there are usually 14–24 segmented larval strobilae, each terminating with an invaginated scolex; larval strobilae arise from a common central vesicle and remain attached posterior to it during the entire development. The number of segments varies between 109 and 120 per larval strobila. The polycephalic larvae examined closely resemble the strobilocercus type of taeniid larvae. The structure of developing and fully-formed larvae was examined by TEM. The tegument, scolex, subtegumental musculature of the strobilar segments, protonephridial system, calcareous corpuscles and medullary parenchyma of larvae exhibit general similarity with the same structures in adults at both LM and TEM levels. The morphogenesis of the larva of T. parva is compared with that of the polycephalic larvae of other Taenia spp. (T. krepkogorski, T. twitchelli and T. endothoracica) and with other asexually-multiplying cestode larvae (mesocestoidids, hymenolepidids and dilepidids).
4

Occurrence of Echinococcus multilocularis [Cestoda, Taeniidae] in red foxes [Vulpes vulpes] from Western Ukraine

84%
Kharchenko V. A., Kornyushin V. V., Varodi E. I., Malega O. M.
Acta Parasitologica
|
2008
|
tom 53
|
nr 1
Echinococcus multilocularis was found for the first time in red foxes in the L’vivska and Volynska regions (Western Ukraine). Prevalence was 36% and intensity was 11–731 parasites. The material was identified as E. multilocularis on morphological characters. It is presumed that this infection of foxes with E. multilocularis occurred locally and, probably, can be considered as a consequence of the expansion of the range of the parasite.
5

Diagnostyka i zwalczanie inwazji tasiemców u psów i kotów

59%
Zygner W., Gorski P., Bartosik J.
Magazyn Weterynaryjny. Zeszyt Edukacyjny
|
2017
|
nr 6. Parazytologia psów i kotów
6

Zoonotyczne pasożyty psów i kotów - prawdy i mity

59%
Gawor J.
Magazyn Weterynaryjny
|
2020
|
tom 29
|
nr 03
7
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Free-living carnivores as an important reservoir of zoonotic parasites in the Tatra Mountains region, Slovakia

59%
Hurnikova Z., Miterpakova M., Cabanova V., Chovancova G.
Annals of Parasitology
|
2016
|
tom 62
|
nr Suppl.
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