The occurrence of frontal glands inTentacularia coryphaenae Bosc 1802 (Cestoda: Trypanorhyncha)

Farooqi, H. U.

doi:10.1007/bf00925487

Cited by 9 publications

(17 citation statements)

References 10 publications

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“…Specialized unicellular glands in metacestodes and juvenile tapeworms have also been considered as penetration glands, with an important role in both penetration and migration (for review see Whittington and Cribb 2001). It is generally accepted that there is a decrease in the secretory activity of type II glands between the metacestodes and adult stages of a number of tapeworms (Kuperman and Davydov 1982, Farooqi 1986, Kuperman 1988, McCullough and Fairweather 1989, Bruòanská et al 2000, Whittington and Cribb 2001. This supports the idea of a highly-developed scolex in adult worms, which is absent in immature specimens.…”

Section: Discussionsupporting

confidence: 55%

Frontal glands in the pseudoscolex of Paraechinophallus japonicus (Yamaguti, 1934) (Cestoda, Bothriocephalidea, Echinophallidae)

Poddubnaya

Scholz²,

Levron

et al. 2007

Acta Parasitologica

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The glands in the pseudoscolex of the echinophallid cestode Paraechinophallus japonicus (Bothriocephalidea), a parasite of the bathypelagic fish Psenopsis anomala (Perciformes, Centrolophidae), were studied using scanning and transmission electron microscopy. Two types of glands, with different morphological types of secretory granules and mechanisms for discharging their glandular secretion, were observed. Both types of gland cell bodies are localized in the parenchyma of the pseudoscolex. The syncytial glands of type I are characterized by the production of small (all ∼0.25 µm in diameter), rounded, dense secretory granules which pass though thin projections into the distal tegumental layer of the pseudoscolex. This type of gland has a unique method of discharging its secretory granules, which we call tumulogenesis. The elimination of the secretory products is realized by an encroachment of the basement membrane and underlying tegumental muscles into the surface region of the distal cytoplasm of the tegument, resulting in the formation of a 'glandular stalk' above which develops a superficial glandular tumulus. In the region of the glandular material of the tumulus, the basement membrane of the stalk forms a dilation, and the appearance of a membrane-bound area serves to separate the tumulus from the distal cytoplasm of the tegument. Unicellular glands of type II are characterized by large granules (0.4-0.9 µm in diameter), the presence of peripheral microtubules in the terminal region of their ducts and an eccrine mechanism for the discharge of their secretory granules. A comparative analysis of the distribution and morphology of the types of scolex glands among members of the different families of the 'Pseudophyllidea' (currently believed to represent two distinct orders, Bothriocephalidea and Diphyllobothriidea) is presented.

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Section: Discussionsupporting

confidence: 55%

Frontal glands in the pseudoscolex of Paraechinophallus japonicus (Yamaguti, 1934) (Cestoda, Bothriocephalidea, Echinophallidae)

Poddubnaya

Scholz²,

Levron

et al. 2007

Acta Parasitologica

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“…Most cestode scolex glands usually develop deep in the parenchyma of the scolex proper and discharge their secretions in the apex, bothrial and acetabular rims or along the neck (Farooqi, ; Gil de Pertierra, ; Kuperman & Davydov, ; McCullough & Fairweather, ); whereas the glandulomuscular organ is restricted to the bothridial parenchyma, and the gland secretions are released in the center of the bothridium. Among phyllobothriids, only the scolex glands of T. gracilis have also been examined using TEM.…”

Section: Discussionmentioning

confidence: 99%

“…Cestode scolex glands usually develop in the parenchyma, and their secretions are discharged through the apex, bothria, acetabula and/or along the neck (Ivanov, ; Kuperman & Davydov, ; McCullough & Fairweather, ). They can be unicellular, syncytial, or acinar (Hayunga, ; Kuperman & Davydov, ; McCullough & Fairweather, ; Poddubnaya, Scholz, Levron, Kuchta, & Gibson, ), with secretions of glycoproteins, lipoproteins, mucopolysaccharides or proteins (Caira, Mega, & Ruhnke, ; Farooqi, ; McCullough & Fairweather, ; Smyth, ; Thompson, Dunsmore, & Hayton, ). Diverse functions for these glands have been proposed, such as proteolisis for extracorporeal digestion or penetration (Arme & Threadgold, ; Poddubnaya et al, ), adhesion (Caira et al, ; McCullough & Fairweather, ), and protection from the host enzymes or the host immune response (Arme & Threadgold, ; Farooqi, ).…”

Section: Introductionmentioning

confidence: 99%

“…They can be unicellular, syncytial, or acinar (Hayunga, ; Kuperman & Davydov, ; McCullough & Fairweather, ; Poddubnaya, Scholz, Levron, Kuchta, & Gibson, ), with secretions of glycoproteins, lipoproteins, mucopolysaccharides or proteins (Caira, Mega, & Ruhnke, ; Farooqi, ; McCullough & Fairweather, ; Smyth, ; Thompson, Dunsmore, & Hayton, ). Diverse functions for these glands have been proposed, such as proteolisis for extracorporeal digestion or penetration (Arme & Threadgold, ; Poddubnaya et al, ), adhesion (Caira et al, ; McCullough & Fairweather, ), and protection from the host enzymes or the host immune response (Arme & Threadgold, ; Farooqi, ). Studies of the ultrastructural morphology of the scolex glands are scattered among cestode orders and known for a few species of Bothriocephalidea, Diphyllobothriidea, Caryophyllidea, Cyclophyllidea, Litobothriidea, Lecanicephalidea, Onchoproteocephalidea, Phyllobothriidea and Trypanorhyncha (Brockerhoff & Jones, ; Gallagher, Caira, & Cantino, ; Hayunga, ; Kuperman & Davydov, ; Moreno, Casado, & Urrea‐París, ; McCullough & Fairweather, ; Poddubnaya et al, ; Whittington & Cribb, ; Zd'árská, Scholz, & Nebesárová, ).…”

Section: Introductionmentioning

confidence: 99%

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Ultrastructure of the scolex of Orygmatobothrium schmittii (Cestoda: Phyllobothriidea)

Mutti

Ivanov

2019

Journal of Morphology

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The ultrastructure of the scolex of Orygmatobothrium schmittii (Cestoda: Phyllobothriidae) was studied using histochemistry, scanning, and transmission electron microscopy. The central bothridial structure resulted in a glandulomuscular organ formed by a mass of syncytial glands and radial muscles, with glycoprotein secretions potentially adhesive. Among the sensory receptors found on the scolex, a particular type was found surrounding the glandulomuscular organ, which might be related in the regulation of the secretions. The internal structure of the microtriches revealed a diversity of configurations according to their morphotype and distribution on the scolex. Microtriches with larger caps are thought to be useful for attachment purposes. In addition, the thick bounding membranes of the attachment organs and the circular musculature in the bothridia, seem to aid to the attachment of the scolex to the mucosa of the host.

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“…The secretions produced from these glands have been reported to be histolytic [33] or to provide protection from the host's immune system [34]. The main aim of this paper is to detail the pathological changes induced by M. wageneri within the intestines of tench including observations on the ultrastructure of the host cellular responses to infection.…”

Section: Introductionmentioning

confidence: 99%

Histological damage and inflammatory response elicited by Monobothrium wageneri (Cestoda) in the intestine of Tinca tinca (Cyprinidae)

et al. 2011

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BackgroundAmong the European cyprinids, tench, Tinca tinca (L.), and the pathological effects their cestodes may effect, have received very little or no attention. Most literature relating to Monobothrium wageneri Nybelin, 1922, a common intestinal cestode of tench, for example, has focused on aspects of its morphology rather than on aspects of the host-parasite interaction.ResultsImmunopathological and ultrastructural studies were conducted on the intestines of 28 tench, collected from Lake Piediluco, of which 16 specimens harboured tight clusters of numerous M. wageneri attached to the intestinal wall. The infection was associated with the degeneration of the mucosal layer and the formation of raised inflammatory swelling surrounding the worms. At the site of infection, the number of granulocytes in the intestine of T. tinca was significantly higher than the number determined 1 cm away from the site of infection or the number found in uninfected fish. Using transmission electron microscopy, mast cells and neutrophils were frequently observed in close proximity to, and inside, the intestinal capillaries; often these cells were in contact with the cestode tegument. At the host-parasite interface, no secretion from the parasite's tegument was observed. Intense degranulation of the mast cells was seen within the submucosa and lamina muscularis, most noticeably at sites close to the tegument of the scolex. In some instances, rodlet cells were encountered in the submucosa. In histological sections, hyperplasia of the mucous cells, notably those giving an alcian blue positive reaction, were evident in the intestinal tissues close to the swelling surrounding the worms. Enhanced mucus secretion was recorded in the intestines of infected tench.ConclusionsThe pathological changes and the inflammatory cellular response induced by the caryophyllidean monozoic tapeworm M. wageneri within the intestinal tract of an Italian population of wild tench is reported for the first time.

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The occurrence of frontal glands inTentacularia coryphaenae Bosc 1802 (Cestoda: Trypanorhyncha)

Cited by 9 publications

References 10 publications

Frontal glands in the pseudoscolex of Paraechinophallus japonicus (Yamaguti, 1934) (Cestoda, Bothriocephalidea, Echinophallidae)

Frontal glands in the pseudoscolex of Paraechinophallus japonicus (Yamaguti, 1934) (Cestoda, Bothriocephalidea, Echinophallidae)

Ultrastructure of the scolex of Orygmatobothrium schmittii (Cestoda: Phyllobothriidea)

Histological damage and inflammatory response elicited by Monobothrium wageneri (Cestoda) in the intestine of Tinca tinca (Cyprinidae)

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