The Ultrastructure of Cestode Muscle

Lumsden, Richard D.; Byram, J. E.

doi:10.2307/3276584

Cited by 53 publications

(18 citation statements)

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“…Our observations are in agreement with the conclusion of Lumsden and Byram (1967) that cestode muscles are of a non-striated type and are rather a variety of smooth muscles.…”

Section: Muscle Systemsupporting

confidence: 82%

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

Z¹,

Miquel²,

Młocicki³

et al. 2007

Acta Parasitologica

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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).

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“…Our observations are in agreement with the conclusion of Lumsden and Byram (1967) that cestode muscles are of a non-striated type and are rather a variety of smooth muscles.…”

Section: Muscle Systemsupporting

confidence: 82%

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

Z¹,

Miquel²,

Młocicki³

et al. 2007

Acta Parasitologica

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“…If we consider that the tapeworm is neutrally buoyant and only fluid drag is considered as the main force, scolex attachment strength alone does not explain how this species remains fixed in the intestine. Hymenolepis diminuta has four kinds of mus cles in its proglottids: longitudinal, circular, transverse and radial bundles (Lumsden & Byram, 1967). These muscles create a peristaltic movement that can counteract bowel movement.…”

Section: Resultsmentioning

confidence: 99%

A method for measuring the attachment strength of the cestode Hymenolepis diminuta to the rat intestine

Xie

Rácz

Terry³

et al. 2016

J. Helminthol.

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A unique adaptation of many internal parasites of mammals is their ability to stay in the intestine for extended periods of time and resist the normal peristaltic movements and forces that push and expel material. To better understand parasite adhesion behaviour and replicate their attachment method in medical devices, an experiment was designed and performed using the rat tapeworm, Hymenolepis diminuta. The experiment employed a tensile test machine and a digital scale and was designed to calculate the attachment strength of the scolex to the mucosa through the change of the value of the digital scale during the tensile test. The attachment force of H. diminuta is 0.021 ± 0.011 g. This method could be applied in studies of parasite biomechanics and the results may help medical device researchers to better mimic the unique functional morphology of this species of parasite.

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“…The nuclei of individual muscle cells are offset and connected by a cytoplasmic bridge (Lumsden and Byram, 1967). This organization is common to most if not all flatworms (Lumsden and Byram, 1967).…”

Section: Musculaturementioning

confidence: 99%

“…2B) and are the dominant muscular structures in the anterior of the worm. The musculature is composed of longitudinal, transverse and circular muscle fibers that have been thoroughly described using ultrastructural methods (Lumsden and Byram, 1967;Specian and Lumsden, 1980) and can be identified using phalloidin staining (Supplementary Movie S1).…”

Section: Musculaturementioning

confidence: 99%

A confocal microscopy-based atlas of tissue architecture in the tapeworm Hymenolepis diminuta

Rozario

Newmark

2015

Experimental Parasitology

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Tapeworms are pervasive and globally distributed parasites that infect millions of humans and livestock every year, and are the causative agents of two of the 17 neglected tropical diseases prioritized by the World Health Organization. Studies of tapeworm biology and pathology are often encumbered by the complex life cycles of disease-relevant tapeworm species that infect hosts such as foxes, dogs, cattle, pigs, and humans. Thus, studies of laboratory models can help overcome the practical, ethical, and cost-related difficulties faced by tapeworm parasitologists. The rat intestinal tapeworm Hymenolepis diminuta is easily reared in the laboratory and has the potential to enable modern molecular-based experiments that will greatly contribute to our understanding of multiple aspects of tapeworm biology, such as growth and reproduction. As part of our efforts to develop molecular tools for experiments on H. diminuta, we have characterized a battery of lectins, antibodies, and common stains that label different tapeworm tissues and organ structures. Using confocal microscopy, we have assembled an "atlas" of H. diminuta organ architecture that will be a useful resource for helminthologists. The methodologies we describe will facilitate characterization of loss-of-function perturbations using H. diminuta. This toolkit will enable a greater understanding of fundamental tapeworm biology that may elucidate new therapeutic targets toward the eradication of these parasites.

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The Ultrastructure of Cestode Muscle

Cited by 53 publications

References 0 publications

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

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

A method for measuring the attachment strength of the cestode Hymenolepis diminuta to the rat intestine

A confocal microscopy-based atlas of tissue architecture in the tapeworm Hymenolepis diminuta

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