Vitellogenesis of the digenean Plagiorchis elegans (Rudolphi, 1802) (Plagiorchioidea, Plagiorchiidae)

2014 ◽  
Vol 63 (3) ◽  
pp. 537-543 ◽  
Author(s):  
Samuel Greani ◽  
Yann Quilichini ◽  
Joséphine Foata ◽  
Stephen E. Greiman ◽  
Papa Ibnou Ndiaye ◽  
...  
Keyword(s):  
Plagiorchis Elegans

The First Record of Parthenitae and Cercariae of Plagiorchis Multiglandularis (Trematoda, Plagiorchiidae) in Lymnaea Stagnalis in Ukraine

2018 ◽  
Vol 52 (4) ◽  
pp. 289-294
Author(s):  
E. P. Zhytova
Keyword(s):  
Lymnaea Stagnalis ◽  
Morphological Characteristics ◽  
First Record ◽  
Morphometric Data ◽  
Diagnostic Characters ◽  
Plagiorchis Elegans

Abstract Parthenitae and cercariae of Plagiorchis. multiglandularis Semenov, 1927 are recorded in Lymnaea stagnalis (Linnaeus, 1758) for the fi rst time in Ukraine; their morphological characteristics are specifi ed. Diagnostic characters of P. multiglandularis parthenitae and cercariae found in Ukrainian Polissia are compared with those from other regions. To confi rm the validity of the species, a comparison of the morphometric data of this trematode larvae with the cercariae of Plagiorchis elegans (Rudolphi, 1802) Braun, 1902, found in molluscs L. stagnalis, L. ralustris and L. corvuses, was performed. It was determined that P. multiglandularis cercariae diff er from those of P. elegans in size and position of the penetration glands.

Plagiorchis elegans: emergence, longevity and infectivity of cercariae, and host behavioural modifications during cercarial emergence

Parasitology ◽  
1994 ◽  
Vol 109 (1) ◽  
pp. 65-72 ◽  
Author(s):  
C. A. Lowenberger ◽  
M. E. Rau
Keyword(s):  
Light Intensity ◽  
Water Column ◽  
Water Surface ◽  
Adaptive Mechanism ◽  
Intermediate Hosts ◽  
Behavioural Changes ◽  
Dense Cloud ◽  
Plagiorchis Elegans ◽  
Cercarial Emergence

SUMMARYWe investigated changes in the behaviour of Stagnicola elodes associated with the emergence of Plagiorchis elegans cercariae. Within 15 min of the reduction in light intensity, which triggered the onset of cercarial emergence, infected snails moved to the top of the water column and remained there for 2–3 h. Seventy-nine percent of all cercariae that emerged from the snail did so during this period. Uninfected snails showed no such behavioural changes following the change in light intensity. Cercariae were released in a dense cloud around the snail at the water surface and dispersed passively. Within 3–4 h more than 80% of all cercariae had settled in the bottom 5 cm of the water column. The infectivity of cercariae increased from less than 20% upon emergence from the snail to greater than 75% 4–6 h post-emergence, and then declined steadily to below 5% by 24 h post-emergence. Cercarial longevity was greater than 30 h and exceeded the period of infectivity. This may be related to steadily falling endogenous glycogen levels. A delay in attaining maximum infectivity may represent an adaptive mechanism allowing time for cercarial dissemination, thus reducing superinfection, and subsequent parasite-associated mortality, of second intermediate hosts.

In vitro Uptake and Incorporation of [ 3 H]Glucosamine and [ 3 H]Leucine by Plagiorchis elegans Metacercariae

1994 ◽  
Vol 80 (3) ◽  
pp. 363 ◽  
Author(s):  
Carl Lowenberger ◽  
Kris Chadee ◽  
Manfred Rau
Keyword(s):  
Plagiorchis Elegans ◽  
In Vitro Uptake

One snail – three Digenea species, different strategies in host-parasite interaction

2011 ◽  
Vol 61 (1) ◽  
pp. 1-19 ◽  
Author(s):  
Elżbieta Żbikowska
Keyword(s):  
Intermediate Host ◽  
Parasite Species ◽  
Lymnaea Stagnalis ◽  
Behavioral Changes ◽  
Diplostomum Pseudospathaceum ◽  
Second Intermediate Host ◽  
Host Parasite ◽  
The Impact ◽  
Plagiorchis Elegans ◽  
First Intermediate Host

AbstractThe mostly lab-based studies on snail-trematode interactions should be complemented by research on naturally invaded hosts. In this mini-review, three different ways of snail exploitation by Digenea larvae are presented. Morphological, physiological and behavioral changes caused by three parasites in the same naturally infected host – Lymnaea stagnalis – differ in species-dependent fashion. The impact of a snail-trematode interaction depends on parasite virulence (i.e. parasite induced lost of fitness of the host). The pathogenicity varies with the survival strategy of the invader. Sporocyst-born Plagiorchis elegans, which uses the same Lymnaea stagnalis individual as a first but also as a second intermediate host, does not disturb host processes as strongly as redia-born Echinoparyphium aconiatum. The third parasite species – Diplostomum pseudospathaceum, also sporocyst-born – is more virulent than P. elegans, but it can modify and relax host exploitation to overwinter in the snail. The data presented demonstrate that successful use of first intermediate host can be arranged in different ways.

Comparison of the helminth fauna of California gulls, Larus californicus, and ring-billed gulls, Larus delawarensis, at Beaverhill and Miquelon Lakes, Alberta

1969 ◽  
Vol 47 (3) ◽  
pp. 267-270 ◽  
Author(s):  
Kees Vermeer
Keyword(s):  
Infected Fish ◽  
Helminth Fauna ◽  
Diplostomum Spathaceum ◽  
Schistocephalus Solidus ◽  
Diphyllobothrium Dendriticum ◽  
Larus Delawarensis ◽  
Plagiorchis Elegans

The helminth fauna of California and ring-billed gulls at Beaverhill and Miquelon lakes, Alberta, was studied. The extensity of the occurrence of Plagiorchis elegans, Diplostomum spathaceum, Hymenolepis californicus, and Aprocta turgida and the intensity of Plagiorchis elegans and Paricterotaenia porosa were significantly greater in the ring-billed gull than in the California gull. The greater occurrence of Diphyllobothrium dendriticum, Schistocephalus solidus, Diplostomum spathaceum, and Cotylurus erraticus in the ring-billed gull indicates that this bird eats more infected fish, in the vicinity of Beaverhill and Miquelon Lakes, than does the California gull.

scholarly journals A molecular and ecological analysis of the trematodePlagiorchis elegansin the wood mouseApodemus sylvaticusfrom a periaquatic ecosystem in the UK

2013 ◽  
Vol 88 (3) ◽  
pp. 310-320 ◽  
Author(s):  
K. Boyce ◽  
G. Hide ◽  
P.S. Craig ◽  
C. Reynolds ◽  
M. Hussain ◽  
...  
Keyword(s):  
Wood Mouse ◽  
Species Identity ◽  
Mouse Population ◽  
5.8S Rdna ◽  
Wood Mice ◽  
Age Cohorts ◽  
Adult Mice ◽  
High Prevalence ◽  
The Uk ◽  
Plagiorchis Elegans

AbstractThe prevalence of the digeneanPlagiorchissp. was investigated in a natural wood mouse population (Apodemus sylvaticus) in a periaquatic environment. Classical identification was complemented with the use of molecular differentiation to determine prevalence and verify species identity. Use of the complete ITS1-5.8S rDNA-ITS2 and partial 28S rDNA gene sequences have confirmed that the species reported at this location wasPlagiorchis elegansand notPlagiorchis murisas reported previously. This underlines the difficulties in identification of these morphologically similar parasites.Plagiorchis elegansis typically a gastrointestinal parasite of avian species but has also been reported from small mammal populations. Although the occurrence of this digenean inA. sylvaticusin the UK is rare, in the area immediately surrounding Malham Tarn, Yorkshire, it had a high prevalence (23%) and a mean worm burden of 26.6 ± 61.5. The distribution ofP. elegansfollowed a typically overdispersed pattern and both mouse age-group and sex were determined to be two main factors associated with prevalence. Male mice harboured the majority of worms, carrying 688 of 717 recovered during the study, and had a higher prevalence of 32.4% in comparison to only 8.7% in the small intestine of female mice. A higher prevalence of 43% was also observed in adult mice compared to 14% for young adults. No infection was observed in juvenile mice. These significant differences are likely to be due to differences in the foraging behaviour between the sexes and age cohorts of wood mice.

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