Rivista e Edizione

Volume 59 (2022): Edizione 2 (June 2022)

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Volume 57 (2020): Edizione 4 (December 2020)

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Volume 57 (2020): Edizione 2 (June 2020)

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Volume 56 (2019): Edizione 4 (December 2019)

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Volume 55 (2018): Edizione 4 (December 2018)

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Volume 54 (2017): Edizione 4 (December 2017)
Special Edizione: This issue is dedicated to the memory of Milan Ryboš, DVM, D.Sc.

Volume 54 (2017): Edizione 3 (September 2017)

Volume 54 (2017): Edizione 2 (June 2017)

Volume 54 (2017): Edizione 1 (March 2017)

Volume 53 (2016): Edizione 4 (December 2016)

Volume 53 (2016): Edizione 3 (September 2016)

Volume 53 (2016): Edizione 2 (June 2016)

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Volume 52 (2015): Edizione 4 (December 2015)

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Volume 50 (2013): Edizione 4 (December 2013)

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Volume 50 (2013): Edizione 2 (June 2013)

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Volume 49 (2012): Edizione 4 (December 2012)

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Volume 49 (2012): Edizione 2 (June 2012)

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Volume 48 (2011): Edizione 4 (December 2011)

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Volume 48 (2011): Edizione 2 (June 2011)

Volume 48 (2011): Edizione 1 (March 2011)

Volume 47 (2010): Edizione 4 (December 2010)

Volume 47 (2010): Edizione 3 (September 2010)

Volume 47 (2010): Edizione 2 (June 2010)

Volume 47 (2010): Edizione 1 (March 2010)

Volume 46 (2009): Edizione 4 (December 2009)

Volume 46 (2009): Edizione 3 (September 2009)

Volume 46 (2009): Edizione 2 (June 2009)

Volume 46 (2009): Edizione 1 (March 2009)

Volume 45 (2008): Edizione 4 (December 2008)

Volume 45 (2008): Edizione 3 (September 2008)

Volume 45 (2008): Edizione 2 (June 2008)

Volume 45 (2008): Edizione 1 (March 2008)

Volume 44 (2007): Edizione 4 (December 2007)

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Volume 44 (2007): Edizione 2 (June 2007)

Volume 44 (2007): Edizione 1 (March 2007)

Volume 43 (2006): Edizione 4 (December 2006)

Volume 43 (2006): Edizione 3 (June 2006)

Volume 43 (2006): Edizione 2 (June 2006)

Volume 43 (2006): Edizione 1 (March 2006)

Dettagli della rivista
Formato
Rivista
eISSN
1336-9083
ISSN
0440-6605
Pubblicato per la prima volta
22 Apr 2006
Periodo di pubblicazione
4 volte all'anno
Lingue
Inglese

Cerca

Volume 46 (2009): Edizione 2 (June 2009)

Dettagli della rivista
Formato
Rivista
eISSN
1336-9083
ISSN
0440-6605
Pubblicato per la prima volta
22 Apr 2006
Periodo di pubblicazione
4 volte all'anno
Lingue
Inglese

Cerca

13 Articoli
Accesso libero

Topoisomerase II of filarial parasite Setaria cervi: purification and characterization

Pubblicato online: 21 Jun 2009
Pagine: 67 - 72

Astratto

Abstract

DNA topoisomerases are ubiquitous enzymes which are involved in replication, transcription, recombination and repair of nucleic acids. DNA topoisomerase II of filarial parasite Setaria cervi was purified to homogeneity by use of cation exchange and affinity chromatography. The purified enzyme migrated on SDS-PAGE as a single band with molecular weight of ∼80 kDa and native molecular weight of the enzyme was found to be 175 kDa indicating the dimeric nature of the protein. Topo II of S. cervi required ATP and dATP for its activity and optimal activity was observed at 1.0 mM ATP concentration. The filarial enzyme also utilized nucleotides, namely GTP, UTP and CTP for its activity. The divalent metal ions requirement of the enzyme showed that beside Mg+2 other ions viz., Ca+2, Mn+2, Cu+2 and Sr+2 were also utilized as cofactor for the activity. Antifilarial compounds ivermectin and diethylcarbamazine inhibited 100 % topo II activity at 100 μM concentration but suramin showed similar effect at 20 μM concentration. Nalidixic acid and novobiocin exhibited 100 % inhibition of the enzyme activity while mAMSA and etoposide inhibited the activity to different extents at 100 μM concentration. In view of significant differences in properties exhibited by the filarial topoisomerase as compared to other parasitic and eukaryotic topoisomerases, the filarial topoisomerase can be usefully exploited to devise new antifilarial compounds.

Parole chiave

  • Setaria cervi
  • DNA topoisomerase II
  • suramin
  • antifilarials
  • ivermectin
  • diethylcarbamazine
  • nalidixic acid
  • novobiocin
  • mAMSA
  • etoposide
  • potential target
  • nucleotide cofactors
Accesso libero

Endoparasites of red fox (Vulpes vulpes) in the Slovak Republic with the emphasis on zoonotic species Echinococcus multilocularis and Trichinella spp.

Pubblicato online: 21 Jun 2009
Pagine: 73 - 79

Astratto

Abstract

Due to specific geographical localization, climatic and geomorphologic conditions, several serious parasitic diseases circulate in the territory of the Slovak Republic that makes this area an ideal model territory of the central European red fox system. The red fox is an important reservoir host of parasites, which can be spread to another animals and humans. Our study was aimed at determining the current prevalence of certain parasites in red foxes from the entire territory of the Slovak Republic and identifies some ecological factors influencing their epidemiology. Within the first systematic investigation of red foxes carried out between the years 2000 and 2006 in total 4026 foxes were examined for Echinococcus multilocularis (prevalence 31.1 %) and 4699 foxes were investigated for the presence of Trichinella spp. larvae (10.4 % infected). The results of the next separate study revealed that 83.3 % of 1198 red foxes in the Slovak Republic had coccidian oocysts and helminth eggs in their faeces. Fifteen helminth species including two trematode, four cestode and nine nematode species were detected by coprological examination. Nine of these parasite taxa have zoonotic potential: Capillaria spp. (prevalence 22.4 %), Ancylostoma caninum (18.1 %), Toxocara canis (12.5 %), Taenia spp. (12.2 %), Mesocestoides spp. (5.8 %), Strongyloides stercoralis (1.6 %), Hymenolepis diminuta (0.6 %), Dipylidium caninum (0.4 %) and Opisthorchis felineus (0.3 %). Toxascaris leonina was the most common helminth species found in this survey (42.9 %).

Parole chiave

  • parasite
  • red fox
  • Echinococcus multilocularis
  • Trichinella spp.
Accesso libero

Preliminary studies on the zoonotic importance of rodents as a reservoir of toxocariasis from recreation grounds in Wroclaw (Poland)

Pubblicato online: 21 Jun 2009
Pagine: 80 - 84

Astratto

Abstract

Due to their specific biology and behaviour, rodents could play a role as an intermediate, definitive or paratenic host for many helminth species, as well as for species of zoonotic significance such as Toxocara spp. or Echinococcus multilocularis. The aim of our preliminary study was to investigate the nematode fauna of rodents collected from recreation grounds located in the vicinity of Wroclaw, and to determine their role in the transmission of toxocariasis in this area. During a one-year period, 90 individuals belonging to three rodent species, i.e. Apodemus agrarius, A. flavicollis and Myodes glareolus, were collected. The overall prevalence of infection with nematodes amounted to 63.33 ± 10.15 % and differed between hosts. Toxocara spp. larvae were located in livers and brains of A. agrarius (12.9 %). Our results indicate a role of rodents in the circulation of toxocariasis in sub-urban areas, which serve as recreation grounds for the city of Wroclaw.

Parole chiave

  • nematodes
  • Toxocara
  • rodents
Accesso libero

Cranial lesions caused by helminth parasites and morphological traits in the European polecat Mustela putorius

Pubblicato online: 21 Jun 2009
Pagine: 85 - 89

Astratto

Abstract

We investigated the occurrence of cranial lesions caused by helminth parasites in the European polecat Mustela putorius in a museum collection in Slovakia. Selected traits of polecat body morphology and condition were studied with respect to the prevalence of the parasites, and number and extent of helminth-caused lesions in crania of 183 adult polecats. The trematode Troglotrema acutum was identified as the parasitic agent (prevalence 62.6 %), with a strong relationship between number of lesions and extent of cranial damage (surface of cranium). Prevalence of infection did not differ significantly between sexes (68.9 % in females, 51.1 % in males). Females with lesions by Troglotrema acutum have significantly greater braincase breadth than uninfected ones. Among males, infected individuals were generally significantly heavier and larger than uninfected individuals. Therefore, contrary to assumptions, it seems that parasites did not influence significantly body measurements of the animals, and differences are probably rather a result of an intra-sample age variation among infected polecats (older individuals are bigger, more probably infected and damage is more pronounced).

Parole chiave

  • age effect
  • cranial damage
  • prevalence
  • sex differences
  • Slovakia
  • trematode
  • Troglotrema acutum
Accesso libero

Redescription of Desportesius brevicaudatus (Spirurida, Acuariidae) based on nematodes from Ixobrychus minutus (Aves, Ciconiiformes) from Bulgaria

Pubblicato online: 21 Jun 2009
Pagine: 90 - 96

Astratto

Abstract

Desportesius brevicaudatus (Dujardin, 1845) is redescribed on the basis of light-microscopy and SEM observations on specimens collected from the oesophagus and under the lining of the gizzard of Ixobrychus minutus (Ardeidae) from Bulgaria. New metrical data expand the known ranges of variation of the measurements of the body, tail, cordons, oesophagus and spicules. New information is provided on the variation of the shape of the deirids, the structure of the vagina, the complexity of the cordons, the pattern of the cuticular striation and the shape of the postdeirids. Cordons are described as consisting of a single row of serrate cuticular plates and a longitudinal cuticular ridge along the outer rims of the cuticular plates. The cuticular ridge is interpreted as homologous to the outer row of plates in the cordons of the genera Acuaria, Cheilospirura and Echinuria.

Parole chiave

  • Nematoda
  • Spirurida
  • Desportesius brevicaudatus
  • morphology
  • Ixobrychus
  • Bulgaria
Accesso libero

Redescription of Charaxicephaloides polyorchis Groschaft and Tenora 1978 (Digenea: Pronocephalidae) from the green turtle Chelonia mydas in Costa Rica

Pubblicato online: 21 Jun 2009
Pagine: 97 - 99

Astratto

Abstract

Charaxicephaloides polyorchis Groschaft and Tenora, 1978 is redescribed on the basis of specimens collected from the stomach of green turtles Chelonia mydas in Costa Rica. Our specimens are consistent with the original description which was based on four flukes from the same host species from the northwest coast of Cuba. Our redescription provides a new range of variations and adds new information on this species. This represents only the second record of C. polyorchis in green turtles.

Parole chiave

  • Charaxicephaloides polyorchis
  • Pronocephalidae
  • green turtle
  • Chelonia mydas
  • Costa Rica
Accesso libero

Life-cycle of Paracoenogonimus ussuriensis sp. n. (Digenea: Cyathocotylidae) in the Primorsky region (southern Far East, Russia)

Pubblicato online: 21 Jun 2009
Pagine: 100 - 106

Astratto

Abstract

New cercariae similar to those of Paracoenogonimus (Cyathocotylidae, Prohemistomatinae), have been found in gastropods Amuropaludina and Cipangopaludina from reservoirs of the Primorsky Region (southern Far East of Russia). Two species of freshwater fishes (Pseudorasbora parva and Perccottus glenii) were experimentally-infected second intermediate hosts. Adults reared in chicken, Gallus gallus dom. They belong to a new species, Paracoenogonimus ussuriensis sp. n. They differ from those of P. szidati (Anderson, 1914) and Mesostephanus appendiculatus (Ciurea, 1916) (=P. skworzowi (Petrov, 1950) sensu Sudarikov 1961) by the size of the body, pharynx and ovary and, further, from the latter by the size of the suckers and testes. Adults differ from P. ovatus Katsurada, 1914 by the smaller dimensions of the oral sucker, pharynx and testes, and also by the absence of anterior interval between vitelline follicles.

Parole chiave

  • Paracoenogonimus ussuriensis sp. n.
  • life-cycle
  • sporocyst
  • cercaria
  • metacercaria
  • adult worm
  • taxonomy
Accesso libero

Helminthofauna of Pelophylax kl. esculentus (Linne, 1758) from Petrovaradinski Rit Marsh (Serbia)

Pubblicato online: 21 Jun 2009
Pagine: 107 - 111

Astratto

Abstract

The helminth fauna of lungs, small intestine, and rectum of 83 female specimens of Pelophylax kl. esculentus was investigated. Three helminth groups, Trematoda, Nematoda, and Acanthocephala were recorded. The sample was dominated by the class Trematoda. This class was represented by 8 adult and 2 larval species. Opisthioglyphe ranae and Pleurogenoides medians were the dominant fluke species. The data show the occurrence of Acanthocephalus ranae in frogs inhabiting Vojvodina Province.

The most frequent Nematoda was Oswaldocruzia filiformis. The greatest number of parasitic species and individuals was isolated from the small intestine. Infestation of individual parasitic groups was greater than that of mixed groups. The most frequent combination was T/N while analysed organs were most frequently invaded by a parasitic species only. Antagonism between genus Rhabdias and Haematoloechus and between species Aplectana acuminata and Opisthioglyphe ranae was ascertained.

Parole chiave

  • helminthofauna
  • genus Pelophylax
  • Petrovaradinski Rit Marsh
Accesso libero

First observation of Posthodiplostomum cuticola (Nordmann, 1832) metacercariae in cypriniformes from Croatia

Pubblicato online: 21 Jun 2009
Pagine: 112 - 116

Astratto

Abstract

During an ichthyological study of the Ilova River, rudd (Scardinius erythrophthalmus) infected with Posthodiplostomum cuticola was observed for the first time in Croatia. Later, a more detailed study was made at the same sampling point and the distribution of P. cuticola in the fish species present was examined. The condition of the hosts and parasitological indices such as prevalence, mean abundance and mean intensity of all hosts examined were investigated. Metacercariae of P. cuticola were most prevalent (100 %) in Rutilus rutilus, Pseudorasbora parva, Leuciscus leuciscus and Alburnus alburnus, slightly lower (93.94 %) in Leuciscus cephalus, substantially lower in Rhodeus amarus (66.67 %) and Barbatula barbatula (50 %) while the lowest prevalence was found in Gobio gobio (47.83 %). The correlation coefficient between number of parasites and total and standard length, weight and Fulton’s condition index of sampled specimen was significant only for L. cephalus.

Parole chiave

  • Postohodiplostomum cuticola
  • Digenea
  • cypriniformes
  • prevalence
  • Ilova river
Accesso libero

Parasitic nematodes of anseriform birds in Hokkaido, Japan

Pubblicato online: 21 Jun 2009
Pagine: 117 - 122

Astratto

Abstract

Parasitic nematodes of 176 individuals of 15 bird species belonging to the order Anseriformes from Hokkaido, Japan were investigated. A total of 12 nematode species were obtained, namely Amidostomum anseris, A. acutum, Epomidiostomum crami, E. uncinatum, Tetrameres fissispina, Eucoleus contortus, Capillaria anatis, Baruscapillaria mergi, Contracaecum rudolphii, Echinuria uncinata, Streptocara crassicauda and Sarconema eurycerca. Among these, E. uncinatum (hosts: Anas platyrhynchos, A. poecilorhyncha, A. acuta, Mel. nigra) and E. crami (hosts: Anser albifroms, Ans. fabalis, C. cygnus, C. columbianus) were the first geographical records in Japan. There appeared to be strict host-parasite relationships between the wild swans/geese and A. anseris/E. crami, and between wild duck species and A. acutum/E. uncinatum, respectively.

Parole chiave

  • Anseriformes
  • parasitic nematodes
  • first geographical records
  • Japan
Accesso libero

Soil nematode community changes associated with windfall and wildfire in forest soil at the High Tatras National Park, Slovak Republic

Pubblicato online: 21 Jun 2009
Pagine: 123 - 130

Astratto

Abstract

The paper presents research findings on the influence of windfall and wildfire on nematode communities in Lariceto-Piceetum forest in the High Tatras in Slovakia. Comparison was made of an intact (REF), affected and extracted (EXT), non-extracted (NEX) and burnt (FIR) forest stand. A total of 55 species belonging to 36 genera were found. The EXT locality harboured the majority of the identified species, but the highest abundance of nematodes was observed in the FIR locality. Bacterial feeders were the dominant trophic group in all investigated plots. In the REF bacterial feeders were followed by root-fungal feeders, fungal feeders and omnivores, in the EXT by omnivores and plant parasites, in the FIR by omnivores and root-fungal feeders and in the NEX by fungal feeders and omnivores. The MI and SI were higher in the REF and the EXT compared to those in the FIR and the NEX, the highest B/F ratio was observed in the FIR and the highest EI was found in the REF. We can conclude that disturbance of forest vegetation and soil has had a clear and demonstrable impact on nematode communities.

Parole chiave

  • Soil nematodes
  • diversity
  • windfall
  • wildfire
  • disturbance of forest soil
Accesso libero

Molecular confirmation of Xiphinema italiae Meyl, 1953 (Nematoda: Longidoridae) from the Slovak Republic

Pubblicato online: 21 Jun 2009
Pagine: 131 - 134

Astratto

Abstract

Identification of the nematode Xiphinema italiae relies mainly on time-consuming morphological and morphometrical studies. A polymerase chain reaction protocol has been used for the reliable and specific identification of X. italiae. Moreover, four independently evolving molecular markers (cox1- cytochrome c oxidase subunit 1; ITS2-second internal transcribed spacer; 18S gene and D2/D3 expansion segments of 28S gene) were amplified and sequenced in both directions.

Parole chiave

  • Xiphinema italiae
  • PCR
  • ITS2
  • cox1
  • 18S
  • 28S
Accesso libero

First record of Steinernema feltiae (Filipjev) (Rhabditida: Steinernematidae) in Slovenia

Pubblicato online: 21 Jun 2009
Pagine: 135 - 138

Astratto

Abstract

In October 2007 we examined 80 soil samples from 16 different locations in the central part of Slovenia (the Notranjska region) and confirmed the presence of entomopathogenic nematodes only in two soil samples. This represents the first recorded instance of an entomopathogenic nematode in Slovenia. In sample B30 we confirmed the presence of Steinernema feltiae (Rhabditida: Steinernematidae) by means of a molecular technique. In Slovenia the application of entomopathogenic nematodes was hitherto possible only in laboratory experiments, while the Rules on Biological Plant Protection made the practical application of exotic organisms in the domestic environment entirely impossible. After the first record of the entomopathogenic nematode S. feltiae we expect the aformentioned agent to become an important alternative to insecticides in plant protection against pest insects.

Parole chiave

  • biological kontrol
  • entomopathogenic nematodes
  • first record
  • Steinernema feltiae
13 Articoli
Accesso libero

Topoisomerase II of filarial parasite Setaria cervi: purification and characterization

Pubblicato online: 21 Jun 2009
Pagine: 67 - 72

Astratto

Abstract

DNA topoisomerases are ubiquitous enzymes which are involved in replication, transcription, recombination and repair of nucleic acids. DNA topoisomerase II of filarial parasite Setaria cervi was purified to homogeneity by use of cation exchange and affinity chromatography. The purified enzyme migrated on SDS-PAGE as a single band with molecular weight of ∼80 kDa and native molecular weight of the enzyme was found to be 175 kDa indicating the dimeric nature of the protein. Topo II of S. cervi required ATP and dATP for its activity and optimal activity was observed at 1.0 mM ATP concentration. The filarial enzyme also utilized nucleotides, namely GTP, UTP and CTP for its activity. The divalent metal ions requirement of the enzyme showed that beside Mg+2 other ions viz., Ca+2, Mn+2, Cu+2 and Sr+2 were also utilized as cofactor for the activity. Antifilarial compounds ivermectin and diethylcarbamazine inhibited 100 % topo II activity at 100 μM concentration but suramin showed similar effect at 20 μM concentration. Nalidixic acid and novobiocin exhibited 100 % inhibition of the enzyme activity while mAMSA and etoposide inhibited the activity to different extents at 100 μM concentration. In view of significant differences in properties exhibited by the filarial topoisomerase as compared to other parasitic and eukaryotic topoisomerases, the filarial topoisomerase can be usefully exploited to devise new antifilarial compounds.

Parole chiave

  • Setaria cervi
  • DNA topoisomerase II
  • suramin
  • antifilarials
  • ivermectin
  • diethylcarbamazine
  • nalidixic acid
  • novobiocin
  • mAMSA
  • etoposide
  • potential target
  • nucleotide cofactors
Accesso libero

Endoparasites of red fox (Vulpes vulpes) in the Slovak Republic with the emphasis on zoonotic species Echinococcus multilocularis and Trichinella spp.

Pubblicato online: 21 Jun 2009
Pagine: 73 - 79

Astratto

Abstract

Due to specific geographical localization, climatic and geomorphologic conditions, several serious parasitic diseases circulate in the territory of the Slovak Republic that makes this area an ideal model territory of the central European red fox system. The red fox is an important reservoir host of parasites, which can be spread to another animals and humans. Our study was aimed at determining the current prevalence of certain parasites in red foxes from the entire territory of the Slovak Republic and identifies some ecological factors influencing their epidemiology. Within the first systematic investigation of red foxes carried out between the years 2000 and 2006 in total 4026 foxes were examined for Echinococcus multilocularis (prevalence 31.1 %) and 4699 foxes were investigated for the presence of Trichinella spp. larvae (10.4 % infected). The results of the next separate study revealed that 83.3 % of 1198 red foxes in the Slovak Republic had coccidian oocysts and helminth eggs in their faeces. Fifteen helminth species including two trematode, four cestode and nine nematode species were detected by coprological examination. Nine of these parasite taxa have zoonotic potential: Capillaria spp. (prevalence 22.4 %), Ancylostoma caninum (18.1 %), Toxocara canis (12.5 %), Taenia spp. (12.2 %), Mesocestoides spp. (5.8 %), Strongyloides stercoralis (1.6 %), Hymenolepis diminuta (0.6 %), Dipylidium caninum (0.4 %) and Opisthorchis felineus (0.3 %). Toxascaris leonina was the most common helminth species found in this survey (42.9 %).

Parole chiave

  • parasite
  • red fox
  • Echinococcus multilocularis
  • Trichinella spp.
Accesso libero

Preliminary studies on the zoonotic importance of rodents as a reservoir of toxocariasis from recreation grounds in Wroclaw (Poland)

Pubblicato online: 21 Jun 2009
Pagine: 80 - 84

Astratto

Abstract

Due to their specific biology and behaviour, rodents could play a role as an intermediate, definitive or paratenic host for many helminth species, as well as for species of zoonotic significance such as Toxocara spp. or Echinococcus multilocularis. The aim of our preliminary study was to investigate the nematode fauna of rodents collected from recreation grounds located in the vicinity of Wroclaw, and to determine their role in the transmission of toxocariasis in this area. During a one-year period, 90 individuals belonging to three rodent species, i.e. Apodemus agrarius, A. flavicollis and Myodes glareolus, were collected. The overall prevalence of infection with nematodes amounted to 63.33 ± 10.15 % and differed between hosts. Toxocara spp. larvae were located in livers and brains of A. agrarius (12.9 %). Our results indicate a role of rodents in the circulation of toxocariasis in sub-urban areas, which serve as recreation grounds for the city of Wroclaw.

Parole chiave

  • nematodes
  • Toxocara
  • rodents
Accesso libero

Cranial lesions caused by helminth parasites and morphological traits in the European polecat Mustela putorius

Pubblicato online: 21 Jun 2009
Pagine: 85 - 89

Astratto

Abstract

We investigated the occurrence of cranial lesions caused by helminth parasites in the European polecat Mustela putorius in a museum collection in Slovakia. Selected traits of polecat body morphology and condition were studied with respect to the prevalence of the parasites, and number and extent of helminth-caused lesions in crania of 183 adult polecats. The trematode Troglotrema acutum was identified as the parasitic agent (prevalence 62.6 %), with a strong relationship between number of lesions and extent of cranial damage (surface of cranium). Prevalence of infection did not differ significantly between sexes (68.9 % in females, 51.1 % in males). Females with lesions by Troglotrema acutum have significantly greater braincase breadth than uninfected ones. Among males, infected individuals were generally significantly heavier and larger than uninfected individuals. Therefore, contrary to assumptions, it seems that parasites did not influence significantly body measurements of the animals, and differences are probably rather a result of an intra-sample age variation among infected polecats (older individuals are bigger, more probably infected and damage is more pronounced).

Parole chiave

  • age effect
  • cranial damage
  • prevalence
  • sex differences
  • Slovakia
  • trematode
  • Troglotrema acutum
Accesso libero

Redescription of Desportesius brevicaudatus (Spirurida, Acuariidae) based on nematodes from Ixobrychus minutus (Aves, Ciconiiformes) from Bulgaria

Pubblicato online: 21 Jun 2009
Pagine: 90 - 96

Astratto

Abstract

Desportesius brevicaudatus (Dujardin, 1845) is redescribed on the basis of light-microscopy and SEM observations on specimens collected from the oesophagus and under the lining of the gizzard of Ixobrychus minutus (Ardeidae) from Bulgaria. New metrical data expand the known ranges of variation of the measurements of the body, tail, cordons, oesophagus and spicules. New information is provided on the variation of the shape of the deirids, the structure of the vagina, the complexity of the cordons, the pattern of the cuticular striation and the shape of the postdeirids. Cordons are described as consisting of a single row of serrate cuticular plates and a longitudinal cuticular ridge along the outer rims of the cuticular plates. The cuticular ridge is interpreted as homologous to the outer row of plates in the cordons of the genera Acuaria, Cheilospirura and Echinuria.

Parole chiave

  • Nematoda
  • Spirurida
  • Desportesius brevicaudatus
  • morphology
  • Ixobrychus
  • Bulgaria
Accesso libero

Redescription of Charaxicephaloides polyorchis Groschaft and Tenora 1978 (Digenea: Pronocephalidae) from the green turtle Chelonia mydas in Costa Rica

Pubblicato online: 21 Jun 2009
Pagine: 97 - 99

Astratto

Abstract

Charaxicephaloides polyorchis Groschaft and Tenora, 1978 is redescribed on the basis of specimens collected from the stomach of green turtles Chelonia mydas in Costa Rica. Our specimens are consistent with the original description which was based on four flukes from the same host species from the northwest coast of Cuba. Our redescription provides a new range of variations and adds new information on this species. This represents only the second record of C. polyorchis in green turtles.

Parole chiave

  • Charaxicephaloides polyorchis
  • Pronocephalidae
  • green turtle
  • Chelonia mydas
  • Costa Rica
Accesso libero

Life-cycle of Paracoenogonimus ussuriensis sp. n. (Digenea: Cyathocotylidae) in the Primorsky region (southern Far East, Russia)

Pubblicato online: 21 Jun 2009
Pagine: 100 - 106

Astratto

Abstract

New cercariae similar to those of Paracoenogonimus (Cyathocotylidae, Prohemistomatinae), have been found in gastropods Amuropaludina and Cipangopaludina from reservoirs of the Primorsky Region (southern Far East of Russia). Two species of freshwater fishes (Pseudorasbora parva and Perccottus glenii) were experimentally-infected second intermediate hosts. Adults reared in chicken, Gallus gallus dom. They belong to a new species, Paracoenogonimus ussuriensis sp. n. They differ from those of P. szidati (Anderson, 1914) and Mesostephanus appendiculatus (Ciurea, 1916) (=P. skworzowi (Petrov, 1950) sensu Sudarikov 1961) by the size of the body, pharynx and ovary and, further, from the latter by the size of the suckers and testes. Adults differ from P. ovatus Katsurada, 1914 by the smaller dimensions of the oral sucker, pharynx and testes, and also by the absence of anterior interval between vitelline follicles.

Parole chiave

  • Paracoenogonimus ussuriensis sp. n.
  • life-cycle
  • sporocyst
  • cercaria
  • metacercaria
  • adult worm
  • taxonomy
Accesso libero

Helminthofauna of Pelophylax kl. esculentus (Linne, 1758) from Petrovaradinski Rit Marsh (Serbia)

Pubblicato online: 21 Jun 2009
Pagine: 107 - 111

Astratto

Abstract

The helminth fauna of lungs, small intestine, and rectum of 83 female specimens of Pelophylax kl. esculentus was investigated. Three helminth groups, Trematoda, Nematoda, and Acanthocephala were recorded. The sample was dominated by the class Trematoda. This class was represented by 8 adult and 2 larval species. Opisthioglyphe ranae and Pleurogenoides medians were the dominant fluke species. The data show the occurrence of Acanthocephalus ranae in frogs inhabiting Vojvodina Province.

The most frequent Nematoda was Oswaldocruzia filiformis. The greatest number of parasitic species and individuals was isolated from the small intestine. Infestation of individual parasitic groups was greater than that of mixed groups. The most frequent combination was T/N while analysed organs were most frequently invaded by a parasitic species only. Antagonism between genus Rhabdias and Haematoloechus and between species Aplectana acuminata and Opisthioglyphe ranae was ascertained.

Parole chiave

  • helminthofauna
  • genus Pelophylax
  • Petrovaradinski Rit Marsh
Accesso libero

First observation of Posthodiplostomum cuticola (Nordmann, 1832) metacercariae in cypriniformes from Croatia

Pubblicato online: 21 Jun 2009
Pagine: 112 - 116

Astratto

Abstract

During an ichthyological study of the Ilova River, rudd (Scardinius erythrophthalmus) infected with Posthodiplostomum cuticola was observed for the first time in Croatia. Later, a more detailed study was made at the same sampling point and the distribution of P. cuticola in the fish species present was examined. The condition of the hosts and parasitological indices such as prevalence, mean abundance and mean intensity of all hosts examined were investigated. Metacercariae of P. cuticola were most prevalent (100 %) in Rutilus rutilus, Pseudorasbora parva, Leuciscus leuciscus and Alburnus alburnus, slightly lower (93.94 %) in Leuciscus cephalus, substantially lower in Rhodeus amarus (66.67 %) and Barbatula barbatula (50 %) while the lowest prevalence was found in Gobio gobio (47.83 %). The correlation coefficient between number of parasites and total and standard length, weight and Fulton’s condition index of sampled specimen was significant only for L. cephalus.

Parole chiave

  • Postohodiplostomum cuticola
  • Digenea
  • cypriniformes
  • prevalence
  • Ilova river
Accesso libero

Parasitic nematodes of anseriform birds in Hokkaido, Japan

Pubblicato online: 21 Jun 2009
Pagine: 117 - 122

Astratto

Abstract

Parasitic nematodes of 176 individuals of 15 bird species belonging to the order Anseriformes from Hokkaido, Japan were investigated. A total of 12 nematode species were obtained, namely Amidostomum anseris, A. acutum, Epomidiostomum crami, E. uncinatum, Tetrameres fissispina, Eucoleus contortus, Capillaria anatis, Baruscapillaria mergi, Contracaecum rudolphii, Echinuria uncinata, Streptocara crassicauda and Sarconema eurycerca. Among these, E. uncinatum (hosts: Anas platyrhynchos, A. poecilorhyncha, A. acuta, Mel. nigra) and E. crami (hosts: Anser albifroms, Ans. fabalis, C. cygnus, C. columbianus) were the first geographical records in Japan. There appeared to be strict host-parasite relationships between the wild swans/geese and A. anseris/E. crami, and between wild duck species and A. acutum/E. uncinatum, respectively.

Parole chiave

  • Anseriformes
  • parasitic nematodes
  • first geographical records
  • Japan
Accesso libero

Soil nematode community changes associated with windfall and wildfire in forest soil at the High Tatras National Park, Slovak Republic

Pubblicato online: 21 Jun 2009
Pagine: 123 - 130

Astratto

Abstract

The paper presents research findings on the influence of windfall and wildfire on nematode communities in Lariceto-Piceetum forest in the High Tatras in Slovakia. Comparison was made of an intact (REF), affected and extracted (EXT), non-extracted (NEX) and burnt (FIR) forest stand. A total of 55 species belonging to 36 genera were found. The EXT locality harboured the majority of the identified species, but the highest abundance of nematodes was observed in the FIR locality. Bacterial feeders were the dominant trophic group in all investigated plots. In the REF bacterial feeders were followed by root-fungal feeders, fungal feeders and omnivores, in the EXT by omnivores and plant parasites, in the FIR by omnivores and root-fungal feeders and in the NEX by fungal feeders and omnivores. The MI and SI were higher in the REF and the EXT compared to those in the FIR and the NEX, the highest B/F ratio was observed in the FIR and the highest EI was found in the REF. We can conclude that disturbance of forest vegetation and soil has had a clear and demonstrable impact on nematode communities.

Parole chiave

  • Soil nematodes
  • diversity
  • windfall
  • wildfire
  • disturbance of forest soil
Accesso libero

Molecular confirmation of Xiphinema italiae Meyl, 1953 (Nematoda: Longidoridae) from the Slovak Republic

Pubblicato online: 21 Jun 2009
Pagine: 131 - 134

Astratto

Abstract

Identification of the nematode Xiphinema italiae relies mainly on time-consuming morphological and morphometrical studies. A polymerase chain reaction protocol has been used for the reliable and specific identification of X. italiae. Moreover, four independently evolving molecular markers (cox1- cytochrome c oxidase subunit 1; ITS2-second internal transcribed spacer; 18S gene and D2/D3 expansion segments of 28S gene) were amplified and sequenced in both directions.

Parole chiave

  • Xiphinema italiae
  • PCR
  • ITS2
  • cox1
  • 18S
  • 28S
Accesso libero

First record of Steinernema feltiae (Filipjev) (Rhabditida: Steinernematidae) in Slovenia

Pubblicato online: 21 Jun 2009
Pagine: 135 - 138

Astratto

Abstract

In October 2007 we examined 80 soil samples from 16 different locations in the central part of Slovenia (the Notranjska region) and confirmed the presence of entomopathogenic nematodes only in two soil samples. This represents the first recorded instance of an entomopathogenic nematode in Slovenia. In sample B30 we confirmed the presence of Steinernema feltiae (Rhabditida: Steinernematidae) by means of a molecular technique. In Slovenia the application of entomopathogenic nematodes was hitherto possible only in laboratory experiments, while the Rules on Biological Plant Protection made the practical application of exotic organisms in the domestic environment entirely impossible. After the first record of the entomopathogenic nematode S. feltiae we expect the aformentioned agent to become an important alternative to insecticides in plant protection against pest insects.

Parole chiave

  • biological kontrol
  • entomopathogenic nematodes
  • first record
  • Steinernema feltiae

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