Role of Surface Carbohydrates in the Adaptation of Fasciola hepatica to the Intermediate Host Galba truncatula

2021 ◽  
pp. 83-94
Author(s):  
Katya Georgieva ◽  
Veselin Nanev
Keyword(s):  
Intermediate Host ◽  
Fasciola Hepatica ◽  
Galba Truncatula ◽  
Surface Carbohydrates

Role of the lymnaeid snailPseudosuccinea columellain the transmission of the liver flukeFasciola hepaticain Egypt

2014 ◽  
Vol 89 (6) ◽  
pp. 699-706 ◽  
Author(s):  
Y. Dar ◽  
P. Vignoles ◽  
D. Rondelaud ◽  
G. Dreyfuss
Keyword(s):  
Microsatellite Markers ◽  
Intermediate Host ◽  
Larval Development ◽  
Experimental Infection ◽  
Fasciola Hepatica ◽  
Experimental Infections ◽  
Lymnaeid Snail ◽  
Important Intermediate

AbstractExperimental infections of three EgyptianPseudosuccinea columellapopulations with sympatric miracidia ofFasciolasp., coming from cattle- or sheep-collected eggs, were carried out to determine the capacity of this lymnaeid to support larval development of the parasite. Using microsatellite markers, the isolates of Egyptian miracidia were identified asFasciola hepatica. Apart from being independent of snail origin, prevalences ranging from 60.4 to 75.5% in snails infected with five miracidia ofF. hepaticawere significantly higher than values of 30.4 to 42.2% in snails with bi-miracidial infections. The number of metacercariae ranged from 243 to 472 per cercarial-shedding snail and was independent of snail origin, parasite origin and miracidial dose used for infection. IfP. columellawas subjected to two successive bi-miracidial infections withF. hepatica, prevalence of infection was 63.3%, with a mean of 311 metacercariae per snail. These values were clearly greater than those already reported forRadix natalensisinfected with the same parasite and the same protocol. Successful experimental infection ofP. columellawithF. hepaticasuggests that this lymnaeid snail is an important intermediate host for the transmission of fascioliasis in Egypt.

Studies on the ecology of Lymnaea tomentosa, the intermediate host of Fasciola hepatica. 1. History, geographical distribution, and environment.

1964 ◽  
Vol 12 (2) ◽  
pp. 217 ◽  
Author(s):  
JC Boray
Keyword(s):  
Intermediate Host ◽  
Geographical Distribution ◽  
Fasciola Hepatica ◽  
Pathological Effect ◽  
Trematode Infection ◽  
Biological Environment ◽  
Ph Range ◽  
Relationship Of ◽  
The Relationship

The role of Lymnaea tomentosa as the intermediate host of Fasciola hepatica is reviewed, and an account is given of its habitats and distribution in Australia. L. tomentosa lives and reproduces within the pH range 5-8, but appears to be more adapted to slightly acid conditions. The relationship of the snail to its biological environment is discussed and observations on its parasites and predators are recorded. The pathological effect of trematode infection of L. tomentosa is described.

Fasciola hepatica miracidia: Lectin binding and stimulation of in vitro miracidium-to-sporocyst transformation

2012 ◽  
Vol 57 (1) ◽  
Author(s):  
Katya Georgieva ◽  
Simona Georgieva ◽  
Yana Mizinska ◽  
Stoyanka Stoitsova
Keyword(s):  
Fasciola Hepatica ◽  
Anterior Part ◽  
Lectin Binding ◽  
Physiological Saline ◽  
Transformation Process ◽  
Binding Properties ◽  
Galba Truncatula ◽  
Surface Carbohydrates

AbstractThe lectin binding properties of Fasciola hepatica miracidia were studied by a panel of fluorescein- and gold-conjugated lectins (ConA, LCA, WGA, LEA, SBA, HPA and UEA-I). The presence of mannose and/or glucose residues was demonstrated with ConA and LCA as weak diffuse fluorescence of the miracidial surface, which was more intense at the anterior part of the larva. The N-acetylglucosamine-binding lectins WGA and LEA reacted intensely with the whole miracidial surface. No labelling with N-acetylgalactosamine and/or galactose-specific (SBA and HPA) and fucose-specific UEA-I lectins was observed. The possibility that the specific recognition of the miracidial surface carbohydrates by lectins may initiate the process of transformation of the miracidia into sporocysts was examined in vitro in physiological saline for Galba truncatula. Incubation in the presence of ConA and WGA resulted in facilitation of the transformation process. Facilitation was absent in the presence of inhibitor sugars. Incubation in the presence of SBA or UEA-I had no effect. The results suggested a possible impact of carbohydrate-lectin interactions in transformation of miracidia of F. hepatica to sporocysts in vivo.

scholarly journals Study of surface carbohydrates in Galba truncatula tissues before and after infection with Fasciola hepatica

2016 ◽  
Vol 111 (7) ◽  
pp. 475-483 ◽  
Author(s):  
Katya Georgieva ◽  
Liliya Georgieva ◽  
Yana Mizinska-Boevska ◽  
Stoyanka R Stoitsova
Keyword(s):  
Fasciola Hepatica ◽  
Galba Truncatula ◽  
Before And After ◽  
Surface Carbohydrates
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