Seasonal Prevalence of Ribeiroia ondatrae in One Population of Planorbella trivolvis (=Helisoma trivolvis), Including Notes on the Larval Trematode Component Community

2007 ◽  
Vol 74 (2) ◽  
pp. 312-318 ◽  
Author(s):  
Nathan A. Peterson
Keyword(s):  
Seasonal Prevalence ◽  
Larval Trematode ◽  
Component Community ◽  
Helisoma Trivolvis ◽  
Planorbella Trivolvis

Parasites in a man-made landscape: contrasting patterns of trematode flow in a fishpond area in Central Europe

Parasitology ◽  
2011 ◽  
Vol 138 (6) ◽  
pp. 789-807 ◽  
Author(s):  
M. SOLDÁNOVÁ ◽  
A. FALTÝNKOVÁ ◽  
T. SCHOLZ ◽  
A. KOSTADINOVA
Keyword(s):  
Agricultural Landscape ◽  
Lymnaea Stagnalis ◽  
Large Body ◽  
Small Scale ◽  
Larval Trematode ◽  
Component Community ◽  
Composition And Structure ◽  
Colonization Potential ◽  
Species Specific ◽  
Transmission Pathways

SUMMARYWe have explored a large body of novel data focusing on small-scale temporal and spatial patterns in the composition and structure of larval trematode communities inLymnaea stagnalis(L.) from a typical Central European agricultural landscape. The 5 eutrophic fishponds studied provide excellent environments for the development of species-rich and abundant trematode communities. Nine prevalent species were consistently present in component communities, but had differential contribution to the parasite flow in the 5 ponds resulting in significant contrasting patterns of community similarity and the prevalence of the 3 major transmission guilds driving this similarity. Component communities split into 2 groups: (i) those from the large pond dominated by anatid and larid generalists with active miracidial transmission; and (ii) those from the smaller ponds dominated by 2 plagiorchioideans infecting snailsviaegg ingestion. We put forward 3 hypotheses for the remarkable differences in larval trematode flow in the similar and closely located eutrophic ponds: (i) species-specific differences in parasite colonization potential displayed by an ‘active-passive’ dichotomy in miracidial transmission strategies of the species; (ii) top-down effects of pond context on transmission pathways of the trematodes; and (iii) competition as an important mechanism in eutrophic environments with a bottom-up effect on component community structure.

Catastrophic Collapse of the Larval Trematode Component Community in Charlie's Pond (North Carolina)

2015 ◽  
Vol 101 (1) ◽  
pp. 116-120 ◽  
Author(s):  
Collin Russell ◽  
Tina Casson ◽  
Courtney Sump ◽  
Kyle Luth ◽  
Michael Zimmermann ◽  
...  
Keyword(s):  
North Carolina ◽  
Larval Trematode ◽  
Component Community

Metazoan Parasites and Health State of European Eel, Anguilla Anguilla (Anguilliformes, Anguillidae), From Tonga Lake and El Mellah Lagoon in the Northeast of Algeria

2018 ◽  
Vol 52 (4) ◽  
pp. 279-288 ◽  
Author(s):  
F. Bakaria ◽  
S. Belhaoues ◽  
N. Djebbari ◽  
M. Tahri ◽  
I. Ladjama ◽  
...  
Keyword(s):  
Brackish Water ◽  
Parasite Species ◽  
Anguilla Anguilla ◽  
European Eel ◽  
Health State ◽  
Component Community ◽  
Metazoan Parasites ◽  
Parasite Communities ◽  
High Dominance ◽  
Argulus Foliaceus

Abstract The aim of the study was to examine metazoans parasite communities of European eels (Anguilla anguilla) in freshwater (Tonga Lake) and brackish water (El Mellah lagoon) in the northeast of Algeria. Six parasite taxa were collected: one monogenean, Pseudodactylogyrus sp.; two crustaceans, Ergasilus sp. and Argulus foliaceus; two nematodes, Cucullanus sp. and Anguillicola crassus; one cestode, Bothriocephalus claviceps. Th e most prevalent parasite taxa in freshwater were Pseudodactylogyrus sp., A. crassus and Bothriocephalus claviceps; whereas in the brackish water, eels were infected mainly with A. crassus. Th e characteristics of the parasite component community structure revealed low parasite species diversity and high dominance values in eels from the two localities. Both communities were dominated by a single parasite species: Tonga eels by the monogenean Pseudodactylogyrus sp. and El Mellah lagoon eels by the nematode A. crassus, verified by high Berger-Parker dominance values of 0.76 and 0.87 respectively.

The incidence of central serous chorioretinopathy in the population of Kazan: Results of a retrospective epidemiological analysis for 2009–2018

2020 ◽  
pp. 30-33
Author(s):  
D. R. Аgliullin ◽  
G. R. Khasanova ◽  
E. A. Abdulaeva ◽  
S. T. Agliullina ◽  
A. N. Amirov ◽  
...  
Keyword(s):  
Growth Rate ◽  
Central Serous Chorioretinopathy ◽  
Morbidity Rate ◽  
Seasonal Prevalence ◽  
Upward Trend ◽  
Epidemiological Analysis ◽  
Significant Upward Trend ◽  
Track Record ◽  
Minimum Age ◽  
The Mean

Objective: To assess the incidence of central serous chorioretinopathy (CSC) through the example of a large industrial Russian city.Methods: A retrospective analysis of CSC of Kazan population for 2009–2018 has been done.Results: From 2019 to 2018, 831 new cases of CSC were registered in Kazan. A statistically significant upward trend with growth rate 105.2% and accession rate 5.2% was typical for the annual track record. The mean age of patients was 50 years, the minimum age was 14 years, the maximum age was 87 years. A statistically significant upward trend was detected in track record of incidence in groups of 30–39-year-old and 40–49-year-old. Seasonal increase of the incidence was recorded in February, March, April, October, and November.Conclusions: The upward trend and seasonal prevalence are typical for longterm morbidity of CSC in Kazan. The highest morbidity rate of CSC and statistically significant upward trend of its incidence in track record were recorded in the age of 30–39. 

Prevalence of Gastrointestinal Parasites of Goats in and around Jabalpur, Madhya Pradesh

2017 ◽  
Vol 13 (02) ◽  
Author(s):  
Kusum Lata ◽  
G. Das ◽  
Nitesh Kumbhakar ◽  
Rupanjali Saiyam
Keyword(s):  
Faecal Sample ◽  
Gastrointestinal Parasites ◽  
Madhya Pradesh ◽  
Seasonal Prevalence ◽  
Post Monsoon ◽  
Gastrointestinal Parasitism ◽  
Specific Species

The present study was conducted to investigate the prevalence of gastrointestinal (GI) parasites of goats in and around Jabalpur. During 9 months of study period, out of 1675 faecal sample of goats examined, 1224 (73.07%) were found positive for different gastrointestinal parasites. The maximum prevalence recorded was of Strongyles (61.43%) followed by Coccidia (25.97%), Amphistomes (9.73%), Monieziaexpansa (8.66%), Trichuris spp. (2.03%), Strongyloides spp. (1.79%) and Fasciolagigantica (0.66%). When prevalence was compared in goats maintained at field and farm conditions, significantly higher infection (P>0.01) was observed at farm (85.90%) as compared to field (67.22%) conditions. The prevalence of gastrointestinal parasitism was found higher in adults (73.83%) in comparison to young goats (69.71%). Overall specific species prevalence showed strongyles infection was significantly higher (P>0.01) in adult (64.25%) as compared to young (48.86%) whereas Coccidia and Monieziaexpansa infection was observed significantly high in kids than adult goats. The seasonal prevalence of gastrointestinal parasites was found significantly higher (P>0.01) in Monsoon (81.20%) and post-monsoon (76.66%) as compared to spring and winter seasons.

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