Wyniki wyszukiwania

1

Variability of metacercariae of Diplostomum pseudospathaceum Niewiadomska, 1984 [Trematoda, Diplostomidae]

100%

Graczyk T.

Acta Parasitologica

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1992

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tom 37

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nr 1

The study lays stress on the morphological variability of metacercariae of Diplostomum pseudospathaceum under the influence of four factors: species and size of the host and density and age of the parasites. A total of 22 experiments were made, using 208 fish belonging to 10 species (three aquarium, seven native Polish species). Ranges of variations found in body size, number of excretory bodies, oral sucker and acetabulum, pharynx, holdfast organ and values of 9 biometric indices are wide and far exceed the ranges of variation given in the literature for this species of metacercaria.

2

Host-induced variability of Diplostomum pseudospathaceum Niewiadomska, 1984 metacercariae [Digenea]

100%

Niewiadomska K., Szymanski S.

Acta Parasitologica

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1992

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tom 37

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nr 1

The variability of metacercariae of Diplostomum pseudospathaceum under the influence of host species was studied experimentally. Four fish groups - two of Cyprinus carpio and two of Poecilia reticulata - were infected with the cercariae of D. pseudospathaceum originating from two snail species Lymnaea stagnalis and Galba palustris. For analysis of variability 14 characters of 152 metacercariae were measured and 8 indices were calculated. The morphometric data of the four experimental groups were examined statistically using a two way analysis of variance. The metacercariae of the four examined groups show highly significant variation in almost all analyzed characters. For particular characters a highly significant fish and snail host influence on the variation was noted. The source of variation was analyzed and the variability of previously investigated D. paracaudum was compared.

3

Species identification of Diplostomum pseudospathaceum Niewiadomska, 1984 and D.paracaudum [Iles, 1959] metacercariae using DNA polymorphism amplified by arbitrary primers

100%

Laskowski Z.

Acta Parasitologica

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1996

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tom 41

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nr 1

Metacercariae of Diplostomum pseudospathaceum and D. paracaudum were examined for genetic differences by random amplified polymorphic DNA analysis. Eleven different oligonucleotide decamers with arbitrary DNA sequence were tested as primers to amplify DNA from D. pseudospathaceum and D. paracaudum. Depending on the primer, the number of reproducible amplified fragments varied from 7 to 15, ranging in size from 0.2 to 2.0 kb DNA. Reproducible differences in patterns allowed differentiation of the two species with each primer. RAPD patterns unambiguously discriminated between D. pseudospathaceum and D. paracaudum, allowing good species identification.

4

Intercellular junctions in Diplostomum pseudospathaceum Metacercariae

88%

Czubaj A., Niewiadomska K., Sobolewska M.

Wiadomości Parazytologiczne. Suplement

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2001

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tom 47

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nr 2

5

First description of the metacercaria of Nematostrigea serpens serpens (Nitzsch, 1819) (Trematoda, Strigeidae) and phylogenetic affiliation of Nematostrigea vietnamiensis Zhokhov and Mishina, 2011

75%

Sokolov S. G., Lebedeva D. I., Khasanov F. K., Gordeev I. I.

Acta Parasitologica

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2021

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tom 66

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nr 2

6

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The results of parasitological investigations of Cyprinidae fishes in the middle region of West Siberia

75%

Strugova A. S.

Wiadomości Parazytologiczne

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1998

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tom 44

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nr 3

7

Ultrastructure of the excretory system in metacercariae of Diplostomum pseudospathaceum [Digenea]

75%

Niewiadomska K., Czubaj A.

Wiadomości Parazytologiczne

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1998

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tom 44

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nr 3

8

Ultrastructure of the excretory system in the metacercaria of Diplostomum pseudospathaceum Niew., 1984 [Digenea]

75%

Niewiadomska K., Czubaj A.

Acta Parasitologica

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2000

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tom 45

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nr 4

The ultrastructure of the proto- and paranephridial excretory systems in the metacercaria of D. pseudospathaceum is described. Basically, the protonephridial system in the metacercaria, although being more complex, does not differ in ultrastructure from that in the cercaria. All protonephridial canals have nuclei and septate desmosomes between neighbouring cells as well as desmosomes closing the canals. Contrary to the protonephridial system, the paranephridial one has a syncytial structure with few cell nuclei in the wall. No septate desmosomes were visible in cross- and longitudinal sections of the paranephridial canals and terminal pockets. The heterocellular gap junctions (nexus) between tegumental cytons and paranephridial canal walls have not previously been observed and described in diplostomid metacercaria. The possible function of these heterocellular gap junctions is discussed.

9

Variability and identification procedure of Diplostomum spathaceum and D.mergi [Digenea]

75%

Niewiadomska K., Niewiadomska-Bugaj M.

Wiadomości Parazytologiczne

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1998

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tom 44

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nr 3

10

Distribution of serotonin immunoreactive [5HI-IR] neurons and fibres in metacercaria of Diplostomum paracaudum [Iles, 1959] [Digenea]

75%

Niewiadomska K., Maslinska D., Czubaj A., Pomorski P.

Acta Parasitologica

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1993

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tom 38

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nr 1

11

Effect of strigeid metacercaria on gills of freshwater fish, Schizothorax richardsonii

75%

Chopra A. K., Kumar A., Singh H. R.

Acta Parasitologica

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1993

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tom 38

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nr 2

12

The nervous system of metacercaria of Clinostomum giganticum Agarwal, 1960 [Trematoda, Clinostomatidae]

75%

Dhanumkumari C., Vijayalakshmi C.

Acta Parasitologica

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1995

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tom 40

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nr 4

The structure of the nervous system in the metacercaria of Clinostomum giganticum has been studied, using the methods of Gomori 1952 and Holt and Withers 1952 for the detection of acetylcholinesterase and non-specific esterase activities respectively. The nervous system of the metacercaria possess paired cerebral ganglia connected by the cerebral commissure, and three anterior and three posterior pairs of longitudinal nerve strands. The anterior and posterior nerves of corresponding pairs are connected by transverse commissures. There are twenty seven commissures in the whole body. The commissures are joined by numerous additional anastomoses giving the appearance of a dense net of nerve fibres.

13

Differences in snail ecology lead to infection pattern variation of Echinostoma spp. larval stages

63%

Zimmermann M. R., Luth K. E., Esch G. W.

Acta Parasitologica

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2014

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tom 59

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nr 3

The infection patterns of parasites are often tied to host behavior. Although most studies have investigated definitive hosts and their parasites, intermediate host behavior may play a role in shaping the distribution and accumulation of parasites, particularly the larval stages. In an attempt to answer this question, more than 4,500 pulmonate snails were collected from 11 states in the mid-Atlantic and Midwestern United States in the summer of 2012. These snails were necropsied and echinostome metecercariae were commonly observed infecting the snails as 2nd intermediate hosts (20.0%). The snails included species of 3 genera with distinct differences in the infection patterns of Echinostoma spp. metacercariae among them. Physa spp. (comprising of P. acuta and P. gyrina) snails exhibited a significantly higher prevalence of infection (23.5%) than both Lymnaea columella (11.6%) and Helisoma spp. (comprising of H. anceps and H. trivolvis) (14.2%; P < 0.05), with no difference in prevalence observed between the latter 2 genera (P > 0.05). The intensity of metacercariae within the snail hosts was significantly different between the 3 genera (P < 0.05), with L. columella having the highest intensity (24.3 ± 5.6), followed by Physa spp. (15.2 ± 1.5) and Helisoma spp. (5.0 ± 0.9). Differences in prevalence and intensity were also observed when the different snail families co-habited the same body of water. The disparities in infection patterns are likely due to distinct differences in the behavioral and feeding ecology of the snail hosts.

14

Metacercariae of Paracoenogonimus ovatus Katsurada, 1914 (Cyathocotylidae) in the muscles of fishes from the Oder River estuary

63%

Linowska A., Sobecka E.

Annals of Parasitology

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2016

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tom 62

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nr Suppl.

15

Snail species diversity impacts the infection patterns of Echinostoma spp.: Examples from field collected data

63%

Zimmermann M. R., Luth K. E., Esch G. W.

Acta Parasitologica

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2017

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tom 62

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nr 3

16

The new data on the serotonin and FMRFamide localization in the nervous system of Opisthorchis felineus metacercaria

63%

Terenina N. B., Kreshchenko N. D., Mochalova N. V., Nefedova D., Voropaeva E. L., Movsesyan S. O., Demiaszkiewicz A., Yashin V. A., Kuchin A. V.

Acta Parasitologica

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2020

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tom 65

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nr 2

17

Import of exotic and zoonotic trematodes (Heterophyidae: Centrocestus sp.) in Xiphophorus maculatus: Implications for ornamental fish import control in Europe

63%

Mehrdana F., Jensen H. M., Kania P. W., Buchmann K.

Acta Parasitologica

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2014

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tom 59

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nr 2

Ornamental fish, Xiphophorus maculatus, were imported from Singapore to Denmark for distribution to local aquarists. Importers observed lethargic and erratic swimming patterns among fish and forwarded a total of 30 fish for pathological examination to a university diagnostic service. All fish were diagnosed infected with encysted Centrocestus sp. metacercariae in gills (prevalence of 100% and mean intensity of 454.5 ± 161.9 parasites per fish). Metacercariae were identified by morphological and molecular methods. Cysts (mean length 163.3 ± 13.7 μm and mean width 113.3 ± 10.6 μm) contained a bent metacercaria with an X-shaped excretory bladder. PCR amplification of a rDNA region (5.8S rRNA gene, ITS-2, 28S rRNA gene) and subsequent sequencing confirmed the diagnosis. Metacercariae were found in gill filaments adjacent to the cartilage associated with cartilage hypertrophy, epithelial and mucous cell hyperplasia, clubbing and lamellar fusion. Host cell encapsulation of cysts comprised several layers of leucocytes, chondroblast-like and fibroblast-like cells. The observations raise concerns with regard to veterinary inspection and quarantine procedures. The zoonotic potential of these trematodes and a possible spread of the parasites in natural habitats in Europe should be regarded as a public health issue. So far, several cases of human infections have been reported only in Asia, but the potential intermediate host snail, Melanoides tuberculata, has been recorded in Germany. Accordingly, establishment of the parasite in Europe with climate changes should be considered a risk.

18

Distribution of Posthodiplostomum cuticola [Nordmann, 1832] [Digenea; Diplostomidae] metacercariae in cyprinids of the Vistula Lagoon, Poland

63%

Rolbiecki L.

Archives of Polish Fisheries

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2004

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tom 12

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nr 1

The distribution of the digenean Posthodiplostomum cuticola in cyprinids caught in the Polish part of the Vistula Lagoon is described. The metacercariae were found to be present in carp bream (Abramis brama), roach (Rutilus rutilus), Prussian carp (Carassius gibelio), white bream (Abramis bjoerkna), ziege (Pelecus cultratus), and common dace (Leuciscus leuciscus). Of the 1287 metacercariae found, 1175 occurred on the body surface, including 780 in the fins, 232 on the scales, and 163 in the skin underneath the scales. The remaining metacercariae occurred in the mouth cavity, gills, and eye sockets. Most of the parasites (1033) were located on the surface of the body below the longitudo caudalis. As is shown by the study, the digenea attack primarily those parts on the fish body that are closest to the bottom. The fins, sites that are more amenable to attachment and subsequently to penetration into the host's tissues, turned out to be the preferred site of the parasite (60.6% of the metacercariae).

19

Occurrence of black-spot disease caused by metacercariae of Posthodiplostomum cuticola among juvenile fishes in water bodies in the Morava River Basin

63%

Ondrackova M., Bartosova S., Valova Z., Jurajda P., Gelnar M.

Acta Parasitologica

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2004

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tom 49

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nr 3

The infection of metacercariae of Posthodiplostomum cuticola (v. Nordmann, 1832), the agent of black-spot disease, was investigated in 0+juvenile fish from 19 localities in south-east Moravia, Czech Republic. Of the 30 fish species examined, only cyprinids of 12 species were found to be infected. Five species of Leuciscinae, Rutilus rutilus, Leuciscus idus, Scardinius erythrophthalmus, Abramis bjoerkna and Abramis brama, fish with similar behaviour and habitat preference in juvenile period, were the most susceptible fish hosts for P. cuticola metacercariae. Especially high infection parameters were found in intergeneric hybrids of the studied leuciscine species. Environmental conditions were an important factor for parasite infection. The fish from flooded borrow pits, inhabiting lentic water bodies with dense vegetation in the littoral zone, showed high prevalence and abundance of P. cuticola infection contrary to their conspecifics in water reservoirs with steep banks and fish from rivers.

20

Life cycle and cercarial chaetotaxy of Psilotrema sp.; systematic review of the Psilostomidae

63%

Bayssade-Dufour C., Grabda-Kazubska B., Kiseliene V.

Wiadomości Parazytologiczne

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1998

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tom 44

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nr 3

Ograniczanie wyników

Variability of metacercariae of Diplostomum pseudospathaceum Niewiadomska, 1984 [Trematoda, Diplostomidae]

Host-induced variability of Diplostomum pseudospathaceum Niewiadomska, 1984 metacercariae [Digenea]

Species identification of Diplostomum pseudospathaceum Niewiadomska, 1984 and D.paracaudum [Iles, 1959] metacercariae using DNA polymorphism amplified by arbitrary primers

Intercellular junctions in Diplostomum pseudospathaceum Metacercariae

First description of the metacercaria of Nematostrigea serpens serpens (Nitzsch, 1819) (Trematoda, Strigeidae) and phylogenetic affiliation of Nematostrigea vietnamiensis Zhokhov and Mishina, 2011

The results of parasitological investigations of Cyprinidae fishes in the middle region of West Siberia

Ultrastructure of the excretory system in metacercariae of Diplostomum pseudospathaceum [Digenea]

Ultrastructure of the excretory system in the metacercaria of Diplostomum pseudospathaceum Niew., 1984 [Digenea]

Variability and identification procedure of Diplostomum spathaceum and D.mergi [Digenea]

Distribution of serotonin immunoreactive [5HI-IR] neurons and fibres in metacercaria of Diplostomum paracaudum [Iles, 1959] [Digenea]

Effect of strigeid metacercaria on gills of freshwater fish, Schizothorax richardsonii

The nervous system of metacercaria of Clinostomum giganticum Agarwal, 1960 [Trematoda, Clinostomatidae]

Differences in snail ecology lead to infection pattern variation of Echinostoma spp. larval stages

Metacercariae of Paracoenogonimus ovatus Katsurada, 1914 (Cyathocotylidae) in the muscles of fishes from the Oder River estuary

Snail species diversity impacts the infection patterns of Echinostoma spp.: Examples from field collected data

The new data on the serotonin and FMRFamide localization in the nervous system of Opisthorchis felineus metacercaria

Import of exotic and zoonotic trematodes (Heterophyidae: Centrocestus sp.) in Xiphophorus maculatus: Implications for ornamental fish import control in Europe

Distribution of Posthodiplostomum cuticola [Nordmann, 1832] [Digenea; Diplostomidae] metacercariae in cyprinids of the Vistula Lagoon, Poland

Occurrence of black-spot disease caused by metacercariae of Posthodiplostomum cuticola among juvenile fishes in water bodies in the Morava River Basin

Life cycle and cercarial chaetotaxy of Psilotrema sp.; systematic review of the Psilostomidae