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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)

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

Volume 48 (2011): Edizione 3 (September 2011)

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

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

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

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

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

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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 48 (2011): Edizione 2 (June 2011)

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

10 Articoli
Accesso libero

Prevalence of echinococcosis in humans, livestock and dogs in northern Italy

Pubblicato online: 17 May 2011
Pagine: 59 - 66

Astratto

Abstract

The presence of Echinococcus sp. cysts was investigated in 822 sheep, 123 goats and 112,521 cattle from Lombardy region, North Italy. Faecal samples from 40 sheepdogs were also analyzed, with 9 samples containing taeniid eggs (22.5 %), 8 samples being coproantigen-positive (20 %), and one dog from a northern province (Lecco) positively confirmed by PCR. Cystic Echinococcosis (CE) was detected in 0.36 % of sheep and in 0.29 % of cattle in 2004. No goat resulted to be infected. Data from CE patients treated in Lombardy were collected by inspecting hospital discharge records. In 2004, 156 CE-related admissions (62 % male and 38 % female) were reported in Lombardy. Total hospital stay was 1,372 days (1,286 for inpatients, 86 for outpatients). Most patients (72.4 %) were residents in Lombardy and 1.9 % were from Piedmont; the remaining patients were from central and southern Italy. According to acquired data CE resulted hypoendemic in animals in Lombardy. Prevalence rates in humans were higher than expected in this region, usually considered as non-endemic. Assessment of the prevalence of CE in humans remains a difficult, costly, time-consuming and labourintensive task. The present study suggests establishing a National Registry of Cystic Echinococcosis with the aim to highlight regional risk factors and to benefit from its matching both clinical and epidemiological data.

Parole chiave

  • Sheep
  • Goat
  • Human
  • Dog
  • Cattle
  • Echinococcus granulosus
  • Italy
  • prevalence
  • hydatid cysts
Accesso libero

Contamination of the soil by eggs of geohelminths in rural areas of Lodz district (Poland)

Pubblicato online: 17 May 2011
Pagine: 67 - 76

Astratto

Abstract

Contamination of soil with helminth eggs in the samples of fields, kitchen gardens, yards and composts in rural areas of Lodz district (Poland) was investigated. In this study, helminth eggs were found in 60–100 % of field samples, in 20–100 % of yards samples, in 0–20 % of kitchen gardens samples and in 10–100 % of composts. The highest average density of helminth eggs in 100 g of soil was detected in composts (44.0), then fields (28.5) and yards (18.0). In samples taken from kitchen gardens the average density of eggs was 0.4/100/g of soil. The comparison of frequency of positive samples from fields, kitchen gardens and yards did not exhibit significant difference (p > 0.05). The soil samples of fields contained mainly eggs of Ascaris spp. (87.7 %), less frequently Toxocara spp. (7.7 %) and Trichuris spp. (3.5 %). In samples from yards among detected eggs the most often were Toxocara spp. (73.9 %), and there were statistically significant differences in comparison with fields (7.7 %) and composts (0.3 %). The highest prevalence of eggs with moving larva was noted in yards (25.6 %), which differ statistically significantly from analogous value for fields (p < 0.05) and composts (p < 0.0001).

These results showed a considerable infestation of soil with geohelminth eggs of the examined rural areas of Lodz district which is a potential source of antropozoonosis.

Parole chiave

  • Toxocara spp.
  • Ascaris spp.
  • geohelminths
  • soil contamination; organic composts
Accesso libero

Biodiversity of strongylids (Nematoda: Strongylidae) communities in domestic horses from Poland and Ukraine

Pubblicato online: 17 May 2011
Pagine: 77 - 84

Astratto

Abstract

Examination of the biodiversity of horse strongylid communities was performed on 51 domestic horses from Southern Poland and Western Ukraine by in vivo method. All horses were dewormed with macrocyclic lactone anthelmintics. Strongylids (34,715 specimens) were collected and identified by morphological criteria. In Poland, 25 strongylid species were found. Five cyathostome species dominated in the community. Large strongyles were found in 23.1 % of horses and composed 0.56 % of total strongylid number. General structure of strongylid community was multimodal with dominant, subdominant, background and rare species. In Ukraine, 19 species were found. Five cyathostome species dominated in the community. Strongylinae were found in 17.4 % of horses and composed 0.07% of community. General structures of strongylid community were multimodal or bimodal depends on type of horse keeping conditions. Regularity of anthelmintic treatment was found to be more influential on strongylid community structure than differences in horse-keeping conditions at the both countries.

Parole chiave

  • Strongylidae
  • biodiversity
  • strongylid community
  • domestic horses
  • Ukraine
  • Poland
Accesso libero

Trinibaculum rotundus n.sp. (Monogenea, Ancyrocephalinae), a parasite of Schizodon borellii (Characiformes, Anostomidae) from the upper Paraná River floodplain, Brazil

Pubblicato online: 17 May 2011
Pagine: 85 - 87

Astratto

Abstract

A new species of dactylogyrid monogenean, Trinibaculum rotundus n.sp. is described and illustrated from the gills of freshwater fish Schizodon borellii (Boulenger, 1900) from the upper Paraná River floodplain, Brazil. Trinibaculum rotundus n.sp. has vagina dextrolateral slightly sclerotised ending at level of seminal receptacle; copulatory organ coiled with 1.5 clockwise rings; accessory piece not articulated; body disk-shape with absence of haptor peduncle and three bars (one ventral bar and two dorsal bars).

Parole chiave

  • Dactylogyridae
  • ectoparasite
  • fish
  • piava
  • floodplain
Accesso libero

Comparative studies on the biochemical composition and polypeptide profiles of the cyst walls from sterile and fertile hydatid cysts of Echinococcus granulosus from buffalo host

Pubblicato online: 17 May 2011
Pagine: 88 - 93

Astratto

Abstract

In the present study, biochemical composition and polypeptide profiles of the cyst walls of sterile and fertile hydatid cyst, collected from the lungs of naturally infected Bubalus bubalis have been investigated. Significant quantitative differences in various biochemical components as well as in protein banding patterns were observed between the two types of cyst walls, suggesting variations in their metabolic states. The cyst wall collected from fertile cysts had significantly less glycogen, lipids and triglycerides but more RNA and DNA as compared to sterile cyst wall. Among phospholipid fractions, lysophosphatidylethanolamine and phosphatidylethanolamine were significantly higher in the fertile, whereas, sphingomyelin showed higher values in the sterile cyst wall. The numbers of polypeptides resolved in the fertile cyst wall were more than those in sterile cyst wall possibly due to the presence of extra proteins required for production of brood capsules and protoscoleces. Detection of more polypeptides by silver than CBBR-250 staining could be due to high sensitivity of silver stain which also detects conjugated proteins such as lipo-, phospho- and glycoproteins. The characteristic polypeptides specific to either types of the cyst wall have the potential to be exploited for diagnostics.

Parole chiave

  • Biochemical composition
  • cyst wall
  • SDS-gradient PAGE
  • polypeptides
Accesso libero

Paravortex panopea n. sp. (Platyhelminthes: Rhabdocoela) on clams from the northern Patagonian coast, Argentina: pathogeny and specificity

Pubblicato online: 17 May 2011
Pagine: 94 - 100

Astratto

Abstract

During a histopathological survey of the geoduck, Panopea abbreviata (Hiatellidae), and the razor clam, Ensis macha (Pharidae), in northern Patagonian gulfs (Argentina), turbellarian worms were found in the intestine lumen. In this work, we described a new species of Paravortex (Platyhelminthes, Graffillidae). We collected the hosts by scuba diving and dissected alive for studying the turbellarians. In this new species, the pharynx continues in a short esophagus and the latter in a saccular intestine. Gravid specimens have from 2 to 8 twin embryos in the parenchyma. A short penis papilla arises from the seminal vesicle and the gonopore presents a strong sphincter. This species resembled P. nicolli Szidat, 1965, which was described paraziting Mytilus edulis platensis in Buenos Aires, Argentina. The new species can be differentiated from P. nicolli mainly by the presence of a penis papilla and a sphincter between genital atrium and gonopore. This turbellarian species was significantly more prevalent in geoducks (28 %, n = 210) than in razor clams (6 %, n = 480) (KW, p < 0.0001). For both host species, no evidence of direct physical damage caused by turbellarians was observed.

Parole chiave

  • Turbellaria
  • Graffillidae
  • mollusca
  • bivalvia
  • parasite
  • specificity
Accesso libero

The helminth parasites of the two bufonid toads, European Common Toad, Bufo bufo (Linnaeus, 1758) and European Green toad, Bufo (Pseudepidalea) viridis Laurenti, 1768 (Anura: Bufonidae), collected from Denizli Province, Inner-West Anatolia Region, Turkey

Pubblicato online: 17 May 2011
Pagine: 101 - 107

Astratto

Abstract

In this research, two bufonid toad species (Bufo bufo and Bufo (Pseudepidalea) viridis) were collected in Denizli province (Inner-west Anatolia Region — the eastern part of Aegean Region) Turkey between 2006 and 2009 and examined first time for helminths. Of 6 Bufo bufo, 5 (97.87 %) were infected with one or more helminths, of 47 Bufo viridis 46 (87.91 %) were infected with one or more helminths. The helminth fauna of Bufo bufo included 5 species of which were 4 species of nematodes (Rhabdias bufonis, Oswadocruzia filiformis, Cosmocerca ornata, and Oxysomatium brevicaudatum), and 1 species of acanthocephalan (Acanthocephalus ranae). The helminth fauna of Bufo (Pseudepidalea) viridis comprised 7 species with 1 species of monogenean (Polystoma viridis), 1 species of cestoda (Nematotaenia dispar), and 5 species of nematodes (R. bufonis, O. filiformis, C. ornata, C. commutata, and O. brevicaudatum). R. bufonis, O. filiformis, C. ornata, and O. brevicaudatum were observed in both bufonid toads.

Parole chiave

  • Amphibians
  • Bufo bufo
  • Bufo (Pseudepidalea) viridis
  • Denizli
  • European common toad
  • European green toad
  • helminths
  • Turkey
Accesso libero

Endoparasitic helminths of water frog complex in Poland: do differences exist between the parental species Pelophylax ridibundus and Pelophylax lessonae, and their natural hybrid Pelophylax esculentus?

Pubblicato online: 17 May 2011
Pagine: 108 - 115

Astratto

Abstract

Parasitic fauna of water frogs was mainly studied in the second half of the 20th century. However, these studies were done without differentiation into species and hybrids and pooled the 3 taxa as “water frogs” or “green frogs”. The aim of this study was to make an inventory of helminth species as well as their prevalence and intensity of infection in the two parental species (Pelophylax ridibundus and P. lessonae) and the hybrid (P. esculentus) of water frogs from 3 big populations composed of hundreds or thousands of individuals inhabited natural and seminatural landscapes in Poland. Eight helminth species were found: Polystoma integerrimum, Diplodiscus subclavatus, Opisthoglyphe ranae, Gorgodera cygnoides, Haematoloechus variegatus, Oswaldocruzia filiformis, Cosmocerca ornata and Acanthocephalus ranae. The results were compared with data from other, polish and European studies. Additionally we compared the level of infection among water frog taxa.

Parole chiave

  • helminth parasites
  • green frogs complex
  • Pelophylax ridibundus
  • Pelophylax lessonae
  • Pelophylax esculentus
  • Poland
Accesso libero

Soil nematode community characteristics around the Gangue hill of Fushun West Open-pit mine

Pubblicato online: 17 May 2011
Pagine: 116 - 123

Astratto

Abstract

Diversity and nematode abundance were investigated in soils collected around the Gangue hill of Fushun West open-pit mine to evaluate soil pollution, due to heavy metals contents, using nematodes as bioindicators. Nematodes were collected from soil samples using elutriate-sievingflotation and centrifugation methods. The species richness and ecological indices were analyzed. On the base of chemical and nematological analysis, the results indicated that the area around the Gangue hill of Fushun West Openpit mine was polluted by heavy metal, but the degree of pollution was not very serious. According to the results obtained from single-factor analysis, cadmium soil content was ten times higher than the background; 29 genera of nematodes were identified and Acrobeloides, Cervidellus and Mesorhabtidis were the dominant genera in almost all sampling sites. The dominant genera were different as the distances to the Gangue hill changed. In particular, in the investigated areas bacterivores and plant-parasites nematodes were more diffuse than fungivores and omnivorepredators. Copper soil content was significantly correlated with plant parasitic trophic group and with total number of nematodes, thus suggesting that nematode communities studies are important scientific basis for understanding the healthy development of soil ecosystem.

Parole chiave

  • soil nematode community
  • heavy metals
  • soil contamination
  • soil ecosystem
  • ecological indices
Accesso libero

Composition and vertical distribution of free living and plant parasitic nematodes in hop gardens in the Czech Republic

Pubblicato online: 17 May 2011
Pagine: 124 - 136

Astratto

Abstract

Composition and vertical distribution of soil nematode communities within soil profile were investigated in eight hop gardens in Czech Republic. In total, the presence of 78 nematode genera was confirmed. Genus Drilocephalobus (Coomans & Coomans, 1990) is new for fauna of the Czech Republic. The highest abundance of soil nematodes was found at a depth of 0–10 cm and declined with increasing depth of soil profile. The most dominant genus was Bitylenchus, followed by genera Acrobeloides, Ditylenchus, Chiloplacus and Cervidelus. Ten genera of plant parasitic nematodes were recorded: Bitylenchus (with prevalence of B. dubius), Helicotylenchus, Heterodera (with absolute prevalence of H. humuli), Geocenamus, Longidorella, Longidorus (only L. elongatus), Merlinius (with prevalence of M. brevidens), Paratylenchus and Pratylenchus. Low population densities of predators and omnivores, low values of the community indices (MI, ΣMI, SI, and CI), and high values of NCR, EI, and PPI/MI ratio indicated disturbed nematode communities in hop gardens and bacteria-dominated decomposition pathways in the soil food web.

Parole chiave

  • Nematoda
  • diversity
  • vertical distribution
  • trophic groups
  • hop gardens
10 Articoli
Accesso libero

Prevalence of echinococcosis in humans, livestock and dogs in northern Italy

Pubblicato online: 17 May 2011
Pagine: 59 - 66

Astratto

Abstract

The presence of Echinococcus sp. cysts was investigated in 822 sheep, 123 goats and 112,521 cattle from Lombardy region, North Italy. Faecal samples from 40 sheepdogs were also analyzed, with 9 samples containing taeniid eggs (22.5 %), 8 samples being coproantigen-positive (20 %), and one dog from a northern province (Lecco) positively confirmed by PCR. Cystic Echinococcosis (CE) was detected in 0.36 % of sheep and in 0.29 % of cattle in 2004. No goat resulted to be infected. Data from CE patients treated in Lombardy were collected by inspecting hospital discharge records. In 2004, 156 CE-related admissions (62 % male and 38 % female) were reported in Lombardy. Total hospital stay was 1,372 days (1,286 for inpatients, 86 for outpatients). Most patients (72.4 %) were residents in Lombardy and 1.9 % were from Piedmont; the remaining patients were from central and southern Italy. According to acquired data CE resulted hypoendemic in animals in Lombardy. Prevalence rates in humans were higher than expected in this region, usually considered as non-endemic. Assessment of the prevalence of CE in humans remains a difficult, costly, time-consuming and labourintensive task. The present study suggests establishing a National Registry of Cystic Echinococcosis with the aim to highlight regional risk factors and to benefit from its matching both clinical and epidemiological data.

Parole chiave

  • Sheep
  • Goat
  • Human
  • Dog
  • Cattle
  • Echinococcus granulosus
  • Italy
  • prevalence
  • hydatid cysts
Accesso libero

Contamination of the soil by eggs of geohelminths in rural areas of Lodz district (Poland)

Pubblicato online: 17 May 2011
Pagine: 67 - 76

Astratto

Abstract

Contamination of soil with helminth eggs in the samples of fields, kitchen gardens, yards and composts in rural areas of Lodz district (Poland) was investigated. In this study, helminth eggs were found in 60–100 % of field samples, in 20–100 % of yards samples, in 0–20 % of kitchen gardens samples and in 10–100 % of composts. The highest average density of helminth eggs in 100 g of soil was detected in composts (44.0), then fields (28.5) and yards (18.0). In samples taken from kitchen gardens the average density of eggs was 0.4/100/g of soil. The comparison of frequency of positive samples from fields, kitchen gardens and yards did not exhibit significant difference (p > 0.05). The soil samples of fields contained mainly eggs of Ascaris spp. (87.7 %), less frequently Toxocara spp. (7.7 %) and Trichuris spp. (3.5 %). In samples from yards among detected eggs the most often were Toxocara spp. (73.9 %), and there were statistically significant differences in comparison with fields (7.7 %) and composts (0.3 %). The highest prevalence of eggs with moving larva was noted in yards (25.6 %), which differ statistically significantly from analogous value for fields (p < 0.05) and composts (p < 0.0001).

These results showed a considerable infestation of soil with geohelminth eggs of the examined rural areas of Lodz district which is a potential source of antropozoonosis.

Parole chiave

  • Toxocara spp.
  • Ascaris spp.
  • geohelminths
  • soil contamination; organic composts
Accesso libero

Biodiversity of strongylids (Nematoda: Strongylidae) communities in domestic horses from Poland and Ukraine

Pubblicato online: 17 May 2011
Pagine: 77 - 84

Astratto

Abstract

Examination of the biodiversity of horse strongylid communities was performed on 51 domestic horses from Southern Poland and Western Ukraine by in vivo method. All horses were dewormed with macrocyclic lactone anthelmintics. Strongylids (34,715 specimens) were collected and identified by morphological criteria. In Poland, 25 strongylid species were found. Five cyathostome species dominated in the community. Large strongyles were found in 23.1 % of horses and composed 0.56 % of total strongylid number. General structure of strongylid community was multimodal with dominant, subdominant, background and rare species. In Ukraine, 19 species were found. Five cyathostome species dominated in the community. Strongylinae were found in 17.4 % of horses and composed 0.07% of community. General structures of strongylid community were multimodal or bimodal depends on type of horse keeping conditions. Regularity of anthelmintic treatment was found to be more influential on strongylid community structure than differences in horse-keeping conditions at the both countries.

Parole chiave

  • Strongylidae
  • biodiversity
  • strongylid community
  • domestic horses
  • Ukraine
  • Poland
Accesso libero

Trinibaculum rotundus n.sp. (Monogenea, Ancyrocephalinae), a parasite of Schizodon borellii (Characiformes, Anostomidae) from the upper Paraná River floodplain, Brazil

Pubblicato online: 17 May 2011
Pagine: 85 - 87

Astratto

Abstract

A new species of dactylogyrid monogenean, Trinibaculum rotundus n.sp. is described and illustrated from the gills of freshwater fish Schizodon borellii (Boulenger, 1900) from the upper Paraná River floodplain, Brazil. Trinibaculum rotundus n.sp. has vagina dextrolateral slightly sclerotised ending at level of seminal receptacle; copulatory organ coiled with 1.5 clockwise rings; accessory piece not articulated; body disk-shape with absence of haptor peduncle and three bars (one ventral bar and two dorsal bars).

Parole chiave

  • Dactylogyridae
  • ectoparasite
  • fish
  • piava
  • floodplain
Accesso libero

Comparative studies on the biochemical composition and polypeptide profiles of the cyst walls from sterile and fertile hydatid cysts of Echinococcus granulosus from buffalo host

Pubblicato online: 17 May 2011
Pagine: 88 - 93

Astratto

Abstract

In the present study, biochemical composition and polypeptide profiles of the cyst walls of sterile and fertile hydatid cyst, collected from the lungs of naturally infected Bubalus bubalis have been investigated. Significant quantitative differences in various biochemical components as well as in protein banding patterns were observed between the two types of cyst walls, suggesting variations in their metabolic states. The cyst wall collected from fertile cysts had significantly less glycogen, lipids and triglycerides but more RNA and DNA as compared to sterile cyst wall. Among phospholipid fractions, lysophosphatidylethanolamine and phosphatidylethanolamine were significantly higher in the fertile, whereas, sphingomyelin showed higher values in the sterile cyst wall. The numbers of polypeptides resolved in the fertile cyst wall were more than those in sterile cyst wall possibly due to the presence of extra proteins required for production of brood capsules and protoscoleces. Detection of more polypeptides by silver than CBBR-250 staining could be due to high sensitivity of silver stain which also detects conjugated proteins such as lipo-, phospho- and glycoproteins. The characteristic polypeptides specific to either types of the cyst wall have the potential to be exploited for diagnostics.

Parole chiave

  • Biochemical composition
  • cyst wall
  • SDS-gradient PAGE
  • polypeptides
Accesso libero

Paravortex panopea n. sp. (Platyhelminthes: Rhabdocoela) on clams from the northern Patagonian coast, Argentina: pathogeny and specificity

Pubblicato online: 17 May 2011
Pagine: 94 - 100

Astratto

Abstract

During a histopathological survey of the geoduck, Panopea abbreviata (Hiatellidae), and the razor clam, Ensis macha (Pharidae), in northern Patagonian gulfs (Argentina), turbellarian worms were found in the intestine lumen. In this work, we described a new species of Paravortex (Platyhelminthes, Graffillidae). We collected the hosts by scuba diving and dissected alive for studying the turbellarians. In this new species, the pharynx continues in a short esophagus and the latter in a saccular intestine. Gravid specimens have from 2 to 8 twin embryos in the parenchyma. A short penis papilla arises from the seminal vesicle and the gonopore presents a strong sphincter. This species resembled P. nicolli Szidat, 1965, which was described paraziting Mytilus edulis platensis in Buenos Aires, Argentina. The new species can be differentiated from P. nicolli mainly by the presence of a penis papilla and a sphincter between genital atrium and gonopore. This turbellarian species was significantly more prevalent in geoducks (28 %, n = 210) than in razor clams (6 %, n = 480) (KW, p < 0.0001). For both host species, no evidence of direct physical damage caused by turbellarians was observed.

Parole chiave

  • Turbellaria
  • Graffillidae
  • mollusca
  • bivalvia
  • parasite
  • specificity
Accesso libero

The helminth parasites of the two bufonid toads, European Common Toad, Bufo bufo (Linnaeus, 1758) and European Green toad, Bufo (Pseudepidalea) viridis Laurenti, 1768 (Anura: Bufonidae), collected from Denizli Province, Inner-West Anatolia Region, Turkey

Pubblicato online: 17 May 2011
Pagine: 101 - 107

Astratto

Abstract

In this research, two bufonid toad species (Bufo bufo and Bufo (Pseudepidalea) viridis) were collected in Denizli province (Inner-west Anatolia Region — the eastern part of Aegean Region) Turkey between 2006 and 2009 and examined first time for helminths. Of 6 Bufo bufo, 5 (97.87 %) were infected with one or more helminths, of 47 Bufo viridis 46 (87.91 %) were infected with one or more helminths. The helminth fauna of Bufo bufo included 5 species of which were 4 species of nematodes (Rhabdias bufonis, Oswadocruzia filiformis, Cosmocerca ornata, and Oxysomatium brevicaudatum), and 1 species of acanthocephalan (Acanthocephalus ranae). The helminth fauna of Bufo (Pseudepidalea) viridis comprised 7 species with 1 species of monogenean (Polystoma viridis), 1 species of cestoda (Nematotaenia dispar), and 5 species of nematodes (R. bufonis, O. filiformis, C. ornata, C. commutata, and O. brevicaudatum). R. bufonis, O. filiformis, C. ornata, and O. brevicaudatum were observed in both bufonid toads.

Parole chiave

  • Amphibians
  • Bufo bufo
  • Bufo (Pseudepidalea) viridis
  • Denizli
  • European common toad
  • European green toad
  • helminths
  • Turkey
Accesso libero

Endoparasitic helminths of water frog complex in Poland: do differences exist between the parental species Pelophylax ridibundus and Pelophylax lessonae, and their natural hybrid Pelophylax esculentus?

Pubblicato online: 17 May 2011
Pagine: 108 - 115

Astratto

Abstract

Parasitic fauna of water frogs was mainly studied in the second half of the 20th century. However, these studies were done without differentiation into species and hybrids and pooled the 3 taxa as “water frogs” or “green frogs”. The aim of this study was to make an inventory of helminth species as well as their prevalence and intensity of infection in the two parental species (Pelophylax ridibundus and P. lessonae) and the hybrid (P. esculentus) of water frogs from 3 big populations composed of hundreds or thousands of individuals inhabited natural and seminatural landscapes in Poland. Eight helminth species were found: Polystoma integerrimum, Diplodiscus subclavatus, Opisthoglyphe ranae, Gorgodera cygnoides, Haematoloechus variegatus, Oswaldocruzia filiformis, Cosmocerca ornata and Acanthocephalus ranae. The results were compared with data from other, polish and European studies. Additionally we compared the level of infection among water frog taxa.

Parole chiave

  • helminth parasites
  • green frogs complex
  • Pelophylax ridibundus
  • Pelophylax lessonae
  • Pelophylax esculentus
  • Poland
Accesso libero

Soil nematode community characteristics around the Gangue hill of Fushun West Open-pit mine

Pubblicato online: 17 May 2011
Pagine: 116 - 123

Astratto

Abstract

Diversity and nematode abundance were investigated in soils collected around the Gangue hill of Fushun West open-pit mine to evaluate soil pollution, due to heavy metals contents, using nematodes as bioindicators. Nematodes were collected from soil samples using elutriate-sievingflotation and centrifugation methods. The species richness and ecological indices were analyzed. On the base of chemical and nematological analysis, the results indicated that the area around the Gangue hill of Fushun West Openpit mine was polluted by heavy metal, but the degree of pollution was not very serious. According to the results obtained from single-factor analysis, cadmium soil content was ten times higher than the background; 29 genera of nematodes were identified and Acrobeloides, Cervidellus and Mesorhabtidis were the dominant genera in almost all sampling sites. The dominant genera were different as the distances to the Gangue hill changed. In particular, in the investigated areas bacterivores and plant-parasites nematodes were more diffuse than fungivores and omnivorepredators. Copper soil content was significantly correlated with plant parasitic trophic group and with total number of nematodes, thus suggesting that nematode communities studies are important scientific basis for understanding the healthy development of soil ecosystem.

Parole chiave

  • soil nematode community
  • heavy metals
  • soil contamination
  • soil ecosystem
  • ecological indices
Accesso libero

Composition and vertical distribution of free living and plant parasitic nematodes in hop gardens in the Czech Republic

Pubblicato online: 17 May 2011
Pagine: 124 - 136

Astratto

Abstract

Composition and vertical distribution of soil nematode communities within soil profile were investigated in eight hop gardens in Czech Republic. In total, the presence of 78 nematode genera was confirmed. Genus Drilocephalobus (Coomans & Coomans, 1990) is new for fauna of the Czech Republic. The highest abundance of soil nematodes was found at a depth of 0–10 cm and declined with increasing depth of soil profile. The most dominant genus was Bitylenchus, followed by genera Acrobeloides, Ditylenchus, Chiloplacus and Cervidelus. Ten genera of plant parasitic nematodes were recorded: Bitylenchus (with prevalence of B. dubius), Helicotylenchus, Heterodera (with absolute prevalence of H. humuli), Geocenamus, Longidorella, Longidorus (only L. elongatus), Merlinius (with prevalence of M. brevidens), Paratylenchus and Pratylenchus. Low population densities of predators and omnivores, low values of the community indices (MI, ΣMI, SI, and CI), and high values of NCR, EI, and PPI/MI ratio indicated disturbed nematode communities in hop gardens and bacteria-dominated decomposition pathways in the soil food web.

Parole chiave

  • Nematoda
  • diversity
  • vertical distribution
  • trophic groups
  • hop gardens

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