Ecological and Physiological Aspects of Helminth-Host Interactions in the Mammalian Gastrointestinal Canal

Mettrick, D. F.; Podesta, Ron B.

doi:10.1016/s0065-308x(08)60389-9

Cited by 108 publications

(43 citation statements)

References 432 publications

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“…On the strobila, they are bladelike and rigid for most of their length and probably serve to keep the absorptive surface of the parasite and host apart, thus maintaining a free flow of nutrients at the interface between the two absorptive surfaces. On the apical rostellum and scolex the microtriches are long, slender filamentous types apparently flexible for most of their length, thus allowing the scolex and rostellum to achieve close contact with the host, perhaps to enhance adhesion (Mettrick and Podesta, 1974;Thompson et al, 1979). p0110…”

Section: U N C O R R E C T E D P R O O Fmentioning

confidence: 99%

Biology and Systematics of Echinococcus

Thompson

2017

Advances in Parasitology

305

282

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Section: U N C O R R E C T E D P R O O Fmentioning

confidence: 99%

Biology and Systematics of Echinococcus

Thompson

2017

Advances in Parasitology

305

282

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“…APM is supported by Acanthocephala's migration capacity within intestinal lumen due to reproductive processes (maturation, copulation and oviposition) while they move mainly jejunum-to-ileum-ward (GeorgeNascimento and Marin 1992; Aznar et al 2004). Parasite's migratory processes can also be influenced by circadian and seasonal cycles such as availability of the food, host's food intake rigor, food bulk intestinal flow, nutritional composition of the food as well as intra-inter-specific relationships as crowding effect (Mettrick and Podesta 1974;Nickol 1985). Males of Acanthocephala are more active in copulation than females; they move seeking for females to mate with as many as possible (Parshad and Crompton 1981).…”

Section: Clchmentioning

confidence: 99%

“…Concerning to the dysfunctionality, the abnormal mean area of attachment of 1.5 mm 2 by each C. australe (Aznar et al 2004), addicted with edema of the submucosa and luminal exposition, could be considered as an important factor to nutrients malabsorption in hard infected hosts. It is important to maintain the isotonicity of the luminal contents because hypertonic solutions within the lumen cause structural and functional damage on the mucosa (Mettrick and Podesta 1974;Pácha 2000). Intestinal epithelium promotes strong exchange of water and electrolytes with body's extracellular fluids and disturbances in this orderly intestinal secretion-reabsorption function can quickly promote severe body fluid depletion (Mettrick and Podesta 1974).…”

Section: Clchmentioning

confidence: 99%

Histological patterns of the intestinal attachment of Corynosoma australe (Acanthocephala: Polymorphidae) in Arctocephalus australis (Mammalia: Pinnipedia)

2013

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The mucosal attachment pattern of Corynosoma australe in the intestines of Arctocephalus australis is described. Normal and abnormal tissue were sampled from 32 hosts to be submitted to histological routine protocol to embedding in paraffin and permanent mounting in balsam. Corynosoma australe shows three different degrees of body depth intestinal attachment (BDINA-1-3). BDINA-1: it is exclusive of the small intestine and the parasite attaches on the villi; BDINA-2: parasite affects the Lieberkühn crypts in several depth levels and, BDINA-3: the parasite reaches the submucosa. These attachment patterns alter the mucosa by degeneration and dysfunction due to necrosis of mucosal structure, great quantities of cellular debris and significant reduction of the mucosal thickness. Other aspects are crater-like concave holes (CLCHs) as sites where C. australe could be attached-detached several times according to adult migratory processes within luminal intestine space. The submucosa shows edema probably due to the local mucosal alterations resulting in homeostatic break. There is no severe inflammatory response by host but BDINA-1 to BDINA-3 and CLCH could represent foci to secondary opportunistic infections and significant areas of malabsorption in severally infected hosts contributing to increase clinical signs of preexistent pathologies.

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“…First, helminth gut position is often assumed to reflect nutrient gradients (e.g. Crompton 1973, Mettrick and Podesta 1974, Haukisalmi et al 1998. Female E. borealis are larger than males, as is frequently the case in acanthocephalans (Poulin and Morand 2000).…”

Section: Discussionmentioning

confidence: 99%

“…Nutrient availability and physiology (e.g. Mettrick and Podesta 1974, Haukisalmi et al 1998, Richardson and Nickol 2000, intra-and interspecific competition (e.g. Holmes 1961, Bush andHolmes 1986), and mating (e.g.…”

mentioning

confidence: 99%

Sexual segregation of Echinorhynchus borealis von Linstow, 1901 (Acanthocephala) in the gut of burbot (Lota lota Linnaeus)

Tuomainen

Valtonen

Benesh

2015

Folia Parasitologica

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Abstract:Helminths often occupy defined niches in the gut of their definitive hosts. In the dioecious acanthocephalans, adult males and females usually have similar gut distributions, but sexual site segregation has been reported in at least some species. We studied the intestinal distribution of the acanthocephalan Echinorhynchus borealis von Linstow, 1901 (syn. of E. cinctulus Porta, 1905 in its definitive host, burbot (Lota lota Linnaeus). Over 80% of female worms were found in the pyloric caeca, whereas the majority of males were in the anterior two-thirds of the intestine. This difference was relatively consistent between individual fish hosts. Worms from different parts of the gut did not differ in length, so site segregation was not obviously related to worm growth or age. We found proportionally more males in the caeca when a larger fraction of the females were found there, suggesting mating opportunities influence gut distribution. However, this result relied on a single parasite infrapopulation and is thus tentative. We discuss how mating strategies and/or sexual differences in life history might explain why males and females occupy different parts of the burbot gut.

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Ecological and Physiological Aspects of Helminth-Host Interactions in the Mammalian Gastrointestinal Canal

Cited by 108 publications

References 432 publications

Biology and Systematics of Echinococcus

Biology and Systematics of Echinococcus

Histological patterns of the intestinal attachment of Corynosoma australe (Acanthocephala: Polymorphidae) in Arctocephalus australis (Mammalia: Pinnipedia)

Sexual segregation of Echinorhynchus borealis von Linstow, 1901 (Acanthocephala) in the gut of burbot (Lota lota Linnaeus)

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