Rivista e Edizione

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Volume 58 (2021): Edizione 1 (March 2021)

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

Volume 57 (2020): Edizione 3 (September 2020)

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

Volume 57 (2020): Edizione 1 (March 2020)

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)

Volume 50 (2013): Edizione 1 (May 2013)

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

Volume 49 (2012): Edizione 3 (September 2012)

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

Volume 49 (2012): Edizione 1 (March 2012)

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)

Volume 44 (2007): Edizione 3 (September 2007)

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 1 (March 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

Genetic markers to gastrointestinal nematode resistance in sheep: a review

Pubblicato online: 25 Apr 2009
Pagine: 3 - 8

Astratto

Abstract

Nematode parasites are the major animal health constraint in sheep production on pasture and cause serious economic losses. Because of failure of anthelmintic drenches, a major research effort has been underway to examine alternatives to chemical control. One of them is selecting sheep which are genetically resistant to parasitic nematodes. However, this last is not widely practiced because of the difficulty of measuring parasite resistance which mostly relies on indirect criteria such as number of nematode eggs passed in the sheep faeces (FEC) packed cell volume (PCV) or enhanced number of eosinophils in peripheral blood. Despite the well known host immune reaction it has been impossible to standardize any immunological parameter and use it as an indicator of parasitic infection. The aim of finding some genetic markers associated with resistance/susceptibility to nematodes is to make diagnostic work easier and conduct an earlier selection of desirable genotypes. However, searching for reliable genetic markers is rather difficult due to different sheep’s manifestation of resistance to either the adult or larval stages of the same parasite species and against the same parasitic stage and various manifestations of the immune responses and antigens against parasites. This review summarizes findings reported in the literature relating to genetic markers to gastrointestinal nematodes resistance in sheep.

Parole chiave

  • gastrointestinal nematode
  • parasites
  • sheep
  • resistance/susceptibility
Accesso libero

Gastro-intestinal parasites in yearlings of wild Polish primitive horses from the Popielno Forest Reserve, Poland

Pubblicato online: 25 Apr 2009
Pagine: 9 - 13

Astratto

Abstract

To evaluate the gastro-intestinal parasite fauna of the wild Polish primitive horses (Equus caballus gmelini Ant., forma silvatica Vet.), 11 yearlings captured in the Reserve according to the control rules of population dynamics were diagnostically dewormed with abamectin+praziquantel. Expelled parasites were collected from the faeces 24, 36 and 48 hours after treatment. Among a total of 4456 specimens (a mean 405.1 per horse) 27 nematode species, one cestode and one species of botfly larvae were recovered. Strongylids were 100 % prevalent and represented by 24 species (2 large strongylid and 22 cyathostome species). Five cyathostome species (Cylicodontophorus bicoronatus, C. insigne, Poteriostomum imparidentatum, Parapoteriostomum mettami and Gyalocephalus capitatus) were recorded for the first time in Polish primitive horses, whereas two species (Cyathostomum montgomeryi and Cylicostephanus bidentatus) were found for the first time in the horse in Poland. Oxyuris equi was found in 100 % and Parascaris equorum in 63.6 % of yearlings surveyed. Tapeworms (Anoplocephala perfoliata) were revealed in 72.7 %, while Gasterophilus intestinalis instars in 90.9 % of horses. At least three parasite species were highly prevalent (i.e. S. vulgaris, A. perfoliata and G. intestinalis), which might be a reason of serious abdominal disorders in Polish horses living freely in the reserve.

Parole chiave

  • gastro-intestinal parasites
  • wild Polish primitive horse
  • Popielno Forest Reserve
Accesso libero

Activity of four entomopathogenic nematode species against different developmental stages of Colorado potato beetle, Leptinotarsa decemlineata (Coleoptera, Chrysomelidae)

Pubblicato online: 25 Apr 2009
Pagine: 14 - 20

Astratto

Abstract

Four entomopathogenic nematode species (Steinernema feltiae, S. carpocapsae, Heterorhabditis bacteriophora, and H. megidis) were tested in a laboratory bioassay for the efficacy of these pathogens in controlling the larvae and adults of the Colorado potato beetle, Leptinotarsa decemlineata. The main aim of the study was to develop an efficient sustainable control method against the pest. With this we could develop a strategy of potato production with the intention of diminishing or even preventing the appearance of pest resistance to insecticides. The activity of these biological agents was assessed at three different temperatures (15, 20, and 25 °C) and three concentrations (200, 1000, and 2000 infective juveniles per individual). Mortality of three stages (young and old larvae and adults) was determined 2, 4, and 7 days after treatment. At 15 °C entomopathogenic nematodes showed the lowest efficacy against all insect stages. No significant differences in efficacy was determined at 20 and 25 °C as all nematodes caused prompt death of all stages. At all temperatures young larvae were most susceptible. However, when controlling overwintered adults for the purpose of preventing the mass appearance of Colorado potato beetle, we recommend an application of higher concentrations of S. feltiae suspension.

Parole chiave

  • biological control
  • efficacy
  • laboratory conditions
  • Leptinotarsa decemlineata
Accesso libero

Developing a dedicated cestode life cycle database: lessons from the hymenolepidids

Pubblicato online: 25 Apr 2009
Pagine: 21 - 27

Astratto

Abstract

The Cestode Life Cycle Database (CLCdb) project was initiated in 2005 with the objective to develop a comprehensive and centralised resource to store, retrieve and analyse key information concerning tapeworm life cycles; e.g. morphogenesis, intermediate host identities, transmission patterns, etc. It constitutes the first electronic database to deal with complex life cycle information for any helminth taxon. Here we critically evaluate our experience after exhaustively entering data for our model group, the cyclophyllidean family Hymenolepididae. After providing basic statistics (530 consulted references; ∼ 230 ‘known’ life cycle), we identify future needs in turning the CLCdb into an open access monograph covering all cestode groups. We review the added benefits and potential utilities of the database for cestodologists and other users, including ecologists and veterinarians, and we call for specialist contributions. Since late 2007, a short version of the CLCdb has been available online, with basic functionalities and tools (www.nhm.ac.uk/research-curation/projects/cestode-life-cycle/index.html).

Parole chiave

  • tapeworms
  • monograph
  • e-resource
  • larval biology
  • biodiversity
Accesso libero

In vitro cultivation of Toxocara cati adult worms for production of eggs and evaluation of oviposition

Pubblicato online: 25 Apr 2009
Pagine: 28 - 30

Astratto

Abstract

Toxocariasis is the clinical syndrome caused by infection of zoonotic roundworms of dogs (Toxocara canis) or cats (Toxocara cati). Current research on the immunology and pathology aspects of toxocariasis requires Toxocara second stage larvae and a ready source of excretory-secretory (ES) antigens. We cultured eleven pairs of both sexes of Toxocara cati adult worms maintained in RPMI 1640 medium in order to evaluate the amounts and duration of egg laying. At the first day and last day (day 19), the mean egg counts were 9300 and 250 eggs/ml, respectively. These results showed that this culture method is very appropriate for collection of pure oviposited eggs and/or production of adult ES antigens of Toxocara cati that could be used for immunological diagnosis of toxocariasis.

Parole chiave

  • Toxocara cati
  • cultivation
  • in vitro
  • Adult worms
Accesso libero

Influence of the genetic pattern and sex of mice in experimental lagochilascariosis

Pubblicato online: 25 Apr 2009
Pagine: 31 - 34

Astratto

Abstract

We studied experimental lagochilascariosis in male and female mice of four strains. The survival ratio and number of larvae recovered varied: B10.A and C57BL/6 mice had the highest number of larvae 90 days after infection and the lowest survival ratio at 345 days of infection. BALB/c mice had an intermediate survival ratio and number of larvae. A/J mice had the lowest number of larvae and the highest survival ratio. Our findings suggest that resistance to Lagochilascaris minor is not linked to the H-2a region because both susceptible B10.A and resistant A/J mice express the H-2a haplotype. However, the pattern of mortality and larvae recovered that we observed in C57BL/6 mice, which possess the same genetic background as B10.A, indicates that the background genotype does affect the outcome of lagochilascariosis in mice. This study demonstrates that the genetic background, but not H-2a or sex, determine the outcome of lagochilascariosis in mice.

Parole chiave

  • Lagochilascaris minor
  • helminth
  • sex
  • MHC
  • H-2
Accesso libero

Distribution of the cestode Taenia parva (Taeniidae) along the digestive tract of the common genet (Genetta genetta)

Pubblicato online: 25 Apr 2009
Pagine: 35 - 38

Astratto

Abstract

The small intestine of the common genet is the habitat of Taenia parva (Taeniidae), a common parasite whose intermediate host is Apodemus spp. (Rodentia). Here we divided the small intestine of 51 common genets into sections and analysed them separately. Cestodes were classified into four categories: larval, pre-adult, adult and gravid specimens. A total of 4,443 individuals were recovered and classified: 543 larval stages, 2,326 pre-adults, 872 adults and 702 gravid specimens. A double analysis was performed by checking the distribution of the parasite along the digestive tract and comparing this distribution with reproductive fitness. This is the first study to test the border effect on the distribution of T. parva in its habitat. We also tested and demonstrated the Ideal Free Distribution Model (IFM model). A non-random distribution was found, with the lowest parasite frequencies in the top and the bottom portions of the small intestine. Maturity classes of cestodes vs. intestine portion were tested and no differences between portions were detected. We also analysed seasonal changes in parasite frequency. Log-linear analysis showed that the mean frequency of cestode occurrence per individual host was higher during winter, followed by spring, autumn and summer.

Parole chiave

  • edge effect
  • Genetta genetta
  • habitat selection
  • parasites
  • site preference
  • Taenia parva
Accesso libero

Description of the development of the attachment and copulatory apparatus of Dactylogyrus extensus from Cyprinus carpio var. koi

Pubblicato online: 25 Apr 2009
Pagine: 39 - 44

Astratto

Abstract

In July 2005 a Koi carp from a private pond in Bavaria was investigated. The aim of the presently reported study was to determine the composition of the monogenean fauna of Koi carp, Cyprinus carpio var. koi and to observe the development of Dactylogyrus extensus, under natural conditions, on the fish gills. A total of three species were recovered, namely: Dactylogyrus extensus Müller et Van Cleave, 1932, Dactylogyrus minutus Kulwieć, 1927, and Gyrodactylus cyprini Diarova, 1964. The dominant species was D. extensus, while the remaining monogeneans were not abundant. Six developmental stages of D. extensus were defined and they were compared with those previously observed by Prost (1963), under experimental conditions. The differences observed in size of the sclerotised structures of the haptor and the copulatory apparatus were discussed.

Parole chiave

  • Cyprinus carpio
  • Koi carp
  • monogenea
  • development
  • Dactylogyrus extensus
  • Germany
Accesso libero

First report of the genus Heterorhabditis (Nematoda: Heterorhabditidae) from continental Portugal

Pubblicato online: 25 Apr 2009
Pagine: 45 - 48

Astratto

Abstract

Until recently, the only entomopathogenic nematode (EPN) species reported from continental Portugal, was of the genus Steinernema. Following a national survey of EPNs in continental Portugal, several natural and managed habitats have been surveyed in the southern part of the country. From 57 soil samples collected using the Galleria mellonella trapping method, three samples yielded EPN. Morphological characterization and sequence analysis of the ITS regions of ribosomal DNA allowed the identification of EPN isolates as Heterorhabditis bacteriophora, representing the first report of this genus for continental Portugal.

Parole chiave

  • Heterorhabditis bacteriophora
  • entomopathogenic nematode
  • Portugal
Accesso libero

Nematode assemblages from Mountain Pine (Pinus mugo Turra) communities in Pirin Mountain, Bulgaria

Pubblicato online: 25 Apr 2009
Pagine: 49 - 58

Astratto

Abstract

The structural and functional diversity of nematode communities from Pinus mugo sites in Pirin Mountain was assessed. The sampling plots represent different levels of disturbance — next to and outside ski runs. Nematode assemblages from this habitat can be characterised with high diversity (in total, 104 taxa and richness ranging from 41 to 65 genera per site). In general, the trophic structure was dominated by omnivorous and bacterial feeders coupled with low proportion of plant feeding nematodes. The high values of Maturity indices and the results from faunal analysis indicate relatively stable environment and undisturbed conditions for all sites. No clear correlation between the nematode assemblages’ characteristics and the level of disturbance (position of the site in relation to ski runs) was revealed.

Parole chiave

  • diversity
  • ecological indices
  • life strategies
  • Pinus mugo
  • nematodes
  • trophic structure
Accesso libero

Stichorchis subtriquetrus in two beavers (Castor fiber) from Slovenia

Pubblicato online: 25 Apr 2009
Pagine: 59 - 61

Astratto

Abstract

Intestines of two beavers (Castor fiber), one killed by a car accident and one drowned were examined for parasites. Examination revealed the presence of 1 and 14 adult trematodes, Stichorchis subtriquetrus in the caecum and colon, respectively. The flotation method revealed no ova from faecal material. The European beaver was present in the territory of Slovenia until the beginning of the 18th century. Recently, in 1998, the species reappeared in southeast of Slovenia as a result of the reintroduction of European beaver in Croatia. This is the first report of veterinary examination of beaver and the first evidence of S. subtriquetrus in Slovenia.

Parole chiave

  • European beaver
  • Stichorchis subtriquetrus
  • Slovenia
Accesso libero

Use of modified McMaster method for the diagnosis of intestinal helminth infections and estimating parasitic egg load in human faecal samples in non-endemic areas

Pubblicato online: 25 Apr 2009
Pagine: 62 - 64

Astratto

Abstract

A modified McMaster method has been used for the diagnosis and estimating helminth egg load in human faecal samples obtained from random consecutive patients in the areas non-endemic for helminth infections (Slovak Republic, North West Russia). Both positive and negative findings were in a 100 % concordance to those obtained with a reference method accepted in clinical diagnostic laboratories (microscopy of the native stool smear). The McMaster method was efficient in detecting nematode eggs in patients’ stool samples with egg load varying from very low (15–60 epg for T. trichiura) to moderate (1650–4500 epg for A. lumbricoides). Therefore, this method may be successfully (and with a better technical feasibility) used for the diagnosis of intestinal helminth infections in non-endemic areas, with further quantitative analysis of the sample when required.

Parole chiave

  • McMaster method
  • helminth eggs
  • human faecal samples
  • diagnosis
  • non-endemic area
Accesso libero

Birthday anniversary of Prof. D.V.M. Pavol Dubinský, D.Sc.

Pubblicato online: 25 Apr 2009
Pagine: 65 - 66

Astratto

13 Articoli
Accesso libero

Genetic markers to gastrointestinal nematode resistance in sheep: a review

Pubblicato online: 25 Apr 2009
Pagine: 3 - 8

Astratto

Abstract

Nematode parasites are the major animal health constraint in sheep production on pasture and cause serious economic losses. Because of failure of anthelmintic drenches, a major research effort has been underway to examine alternatives to chemical control. One of them is selecting sheep which are genetically resistant to parasitic nematodes. However, this last is not widely practiced because of the difficulty of measuring parasite resistance which mostly relies on indirect criteria such as number of nematode eggs passed in the sheep faeces (FEC) packed cell volume (PCV) or enhanced number of eosinophils in peripheral blood. Despite the well known host immune reaction it has been impossible to standardize any immunological parameter and use it as an indicator of parasitic infection. The aim of finding some genetic markers associated with resistance/susceptibility to nematodes is to make diagnostic work easier and conduct an earlier selection of desirable genotypes. However, searching for reliable genetic markers is rather difficult due to different sheep’s manifestation of resistance to either the adult or larval stages of the same parasite species and against the same parasitic stage and various manifestations of the immune responses and antigens against parasites. This review summarizes findings reported in the literature relating to genetic markers to gastrointestinal nematodes resistance in sheep.

Parole chiave

  • gastrointestinal nematode
  • parasites
  • sheep
  • resistance/susceptibility
Accesso libero

Gastro-intestinal parasites in yearlings of wild Polish primitive horses from the Popielno Forest Reserve, Poland

Pubblicato online: 25 Apr 2009
Pagine: 9 - 13

Astratto

Abstract

To evaluate the gastro-intestinal parasite fauna of the wild Polish primitive horses (Equus caballus gmelini Ant., forma silvatica Vet.), 11 yearlings captured in the Reserve according to the control rules of population dynamics were diagnostically dewormed with abamectin+praziquantel. Expelled parasites were collected from the faeces 24, 36 and 48 hours after treatment. Among a total of 4456 specimens (a mean 405.1 per horse) 27 nematode species, one cestode and one species of botfly larvae were recovered. Strongylids were 100 % prevalent and represented by 24 species (2 large strongylid and 22 cyathostome species). Five cyathostome species (Cylicodontophorus bicoronatus, C. insigne, Poteriostomum imparidentatum, Parapoteriostomum mettami and Gyalocephalus capitatus) were recorded for the first time in Polish primitive horses, whereas two species (Cyathostomum montgomeryi and Cylicostephanus bidentatus) were found for the first time in the horse in Poland. Oxyuris equi was found in 100 % and Parascaris equorum in 63.6 % of yearlings surveyed. Tapeworms (Anoplocephala perfoliata) were revealed in 72.7 %, while Gasterophilus intestinalis instars in 90.9 % of horses. At least three parasite species were highly prevalent (i.e. S. vulgaris, A. perfoliata and G. intestinalis), which might be a reason of serious abdominal disorders in Polish horses living freely in the reserve.

Parole chiave

  • gastro-intestinal parasites
  • wild Polish primitive horse
  • Popielno Forest Reserve
Accesso libero

Activity of four entomopathogenic nematode species against different developmental stages of Colorado potato beetle, Leptinotarsa decemlineata (Coleoptera, Chrysomelidae)

Pubblicato online: 25 Apr 2009
Pagine: 14 - 20

Astratto

Abstract

Four entomopathogenic nematode species (Steinernema feltiae, S. carpocapsae, Heterorhabditis bacteriophora, and H. megidis) were tested in a laboratory bioassay for the efficacy of these pathogens in controlling the larvae and adults of the Colorado potato beetle, Leptinotarsa decemlineata. The main aim of the study was to develop an efficient sustainable control method against the pest. With this we could develop a strategy of potato production with the intention of diminishing or even preventing the appearance of pest resistance to insecticides. The activity of these biological agents was assessed at three different temperatures (15, 20, and 25 °C) and three concentrations (200, 1000, and 2000 infective juveniles per individual). Mortality of three stages (young and old larvae and adults) was determined 2, 4, and 7 days after treatment. At 15 °C entomopathogenic nematodes showed the lowest efficacy against all insect stages. No significant differences in efficacy was determined at 20 and 25 °C as all nematodes caused prompt death of all stages. At all temperatures young larvae were most susceptible. However, when controlling overwintered adults for the purpose of preventing the mass appearance of Colorado potato beetle, we recommend an application of higher concentrations of S. feltiae suspension.

Parole chiave

  • biological control
  • efficacy
  • laboratory conditions
  • Leptinotarsa decemlineata
Accesso libero

Developing a dedicated cestode life cycle database: lessons from the hymenolepidids

Pubblicato online: 25 Apr 2009
Pagine: 21 - 27

Astratto

Abstract

The Cestode Life Cycle Database (CLCdb) project was initiated in 2005 with the objective to develop a comprehensive and centralised resource to store, retrieve and analyse key information concerning tapeworm life cycles; e.g. morphogenesis, intermediate host identities, transmission patterns, etc. It constitutes the first electronic database to deal with complex life cycle information for any helminth taxon. Here we critically evaluate our experience after exhaustively entering data for our model group, the cyclophyllidean family Hymenolepididae. After providing basic statistics (530 consulted references; ∼ 230 ‘known’ life cycle), we identify future needs in turning the CLCdb into an open access monograph covering all cestode groups. We review the added benefits and potential utilities of the database for cestodologists and other users, including ecologists and veterinarians, and we call for specialist contributions. Since late 2007, a short version of the CLCdb has been available online, with basic functionalities and tools (www.nhm.ac.uk/research-curation/projects/cestode-life-cycle/index.html).

Parole chiave

  • tapeworms
  • monograph
  • e-resource
  • larval biology
  • biodiversity
Accesso libero

In vitro cultivation of Toxocara cati adult worms for production of eggs and evaluation of oviposition

Pubblicato online: 25 Apr 2009
Pagine: 28 - 30

Astratto

Abstract

Toxocariasis is the clinical syndrome caused by infection of zoonotic roundworms of dogs (Toxocara canis) or cats (Toxocara cati). Current research on the immunology and pathology aspects of toxocariasis requires Toxocara second stage larvae and a ready source of excretory-secretory (ES) antigens. We cultured eleven pairs of both sexes of Toxocara cati adult worms maintained in RPMI 1640 medium in order to evaluate the amounts and duration of egg laying. At the first day and last day (day 19), the mean egg counts were 9300 and 250 eggs/ml, respectively. These results showed that this culture method is very appropriate for collection of pure oviposited eggs and/or production of adult ES antigens of Toxocara cati that could be used for immunological diagnosis of toxocariasis.

Parole chiave

  • Toxocara cati
  • cultivation
  • in vitro
  • Adult worms
Accesso libero

Influence of the genetic pattern and sex of mice in experimental lagochilascariosis

Pubblicato online: 25 Apr 2009
Pagine: 31 - 34

Astratto

Abstract

We studied experimental lagochilascariosis in male and female mice of four strains. The survival ratio and number of larvae recovered varied: B10.A and C57BL/6 mice had the highest number of larvae 90 days after infection and the lowest survival ratio at 345 days of infection. BALB/c mice had an intermediate survival ratio and number of larvae. A/J mice had the lowest number of larvae and the highest survival ratio. Our findings suggest that resistance to Lagochilascaris minor is not linked to the H-2a region because both susceptible B10.A and resistant A/J mice express the H-2a haplotype. However, the pattern of mortality and larvae recovered that we observed in C57BL/6 mice, which possess the same genetic background as B10.A, indicates that the background genotype does affect the outcome of lagochilascariosis in mice. This study demonstrates that the genetic background, but not H-2a or sex, determine the outcome of lagochilascariosis in mice.

Parole chiave

  • Lagochilascaris minor
  • helminth
  • sex
  • MHC
  • H-2
Accesso libero

Distribution of the cestode Taenia parva (Taeniidae) along the digestive tract of the common genet (Genetta genetta)

Pubblicato online: 25 Apr 2009
Pagine: 35 - 38

Astratto

Abstract

The small intestine of the common genet is the habitat of Taenia parva (Taeniidae), a common parasite whose intermediate host is Apodemus spp. (Rodentia). Here we divided the small intestine of 51 common genets into sections and analysed them separately. Cestodes were classified into four categories: larval, pre-adult, adult and gravid specimens. A total of 4,443 individuals were recovered and classified: 543 larval stages, 2,326 pre-adults, 872 adults and 702 gravid specimens. A double analysis was performed by checking the distribution of the parasite along the digestive tract and comparing this distribution with reproductive fitness. This is the first study to test the border effect on the distribution of T. parva in its habitat. We also tested and demonstrated the Ideal Free Distribution Model (IFM model). A non-random distribution was found, with the lowest parasite frequencies in the top and the bottom portions of the small intestine. Maturity classes of cestodes vs. intestine portion were tested and no differences between portions were detected. We also analysed seasonal changes in parasite frequency. Log-linear analysis showed that the mean frequency of cestode occurrence per individual host was higher during winter, followed by spring, autumn and summer.

Parole chiave

  • edge effect
  • Genetta genetta
  • habitat selection
  • parasites
  • site preference
  • Taenia parva
Accesso libero

Description of the development of the attachment and copulatory apparatus of Dactylogyrus extensus from Cyprinus carpio var. koi

Pubblicato online: 25 Apr 2009
Pagine: 39 - 44

Astratto

Abstract

In July 2005 a Koi carp from a private pond in Bavaria was investigated. The aim of the presently reported study was to determine the composition of the monogenean fauna of Koi carp, Cyprinus carpio var. koi and to observe the development of Dactylogyrus extensus, under natural conditions, on the fish gills. A total of three species were recovered, namely: Dactylogyrus extensus Müller et Van Cleave, 1932, Dactylogyrus minutus Kulwieć, 1927, and Gyrodactylus cyprini Diarova, 1964. The dominant species was D. extensus, while the remaining monogeneans were not abundant. Six developmental stages of D. extensus were defined and they were compared with those previously observed by Prost (1963), under experimental conditions. The differences observed in size of the sclerotised structures of the haptor and the copulatory apparatus were discussed.

Parole chiave

  • Cyprinus carpio
  • Koi carp
  • monogenea
  • development
  • Dactylogyrus extensus
  • Germany
Accesso libero

First report of the genus Heterorhabditis (Nematoda: Heterorhabditidae) from continental Portugal

Pubblicato online: 25 Apr 2009
Pagine: 45 - 48

Astratto

Abstract

Until recently, the only entomopathogenic nematode (EPN) species reported from continental Portugal, was of the genus Steinernema. Following a national survey of EPNs in continental Portugal, several natural and managed habitats have been surveyed in the southern part of the country. From 57 soil samples collected using the Galleria mellonella trapping method, three samples yielded EPN. Morphological characterization and sequence analysis of the ITS regions of ribosomal DNA allowed the identification of EPN isolates as Heterorhabditis bacteriophora, representing the first report of this genus for continental Portugal.

Parole chiave

  • Heterorhabditis bacteriophora
  • entomopathogenic nematode
  • Portugal
Accesso libero

Nematode assemblages from Mountain Pine (Pinus mugo Turra) communities in Pirin Mountain, Bulgaria

Pubblicato online: 25 Apr 2009
Pagine: 49 - 58

Astratto

Abstract

The structural and functional diversity of nematode communities from Pinus mugo sites in Pirin Mountain was assessed. The sampling plots represent different levels of disturbance — next to and outside ski runs. Nematode assemblages from this habitat can be characterised with high diversity (in total, 104 taxa and richness ranging from 41 to 65 genera per site). In general, the trophic structure was dominated by omnivorous and bacterial feeders coupled with low proportion of plant feeding nematodes. The high values of Maturity indices and the results from faunal analysis indicate relatively stable environment and undisturbed conditions for all sites. No clear correlation between the nematode assemblages’ characteristics and the level of disturbance (position of the site in relation to ski runs) was revealed.

Parole chiave

  • diversity
  • ecological indices
  • life strategies
  • Pinus mugo
  • nematodes
  • trophic structure
Accesso libero

Stichorchis subtriquetrus in two beavers (Castor fiber) from Slovenia

Pubblicato online: 25 Apr 2009
Pagine: 59 - 61

Astratto

Abstract

Intestines of two beavers (Castor fiber), one killed by a car accident and one drowned were examined for parasites. Examination revealed the presence of 1 and 14 adult trematodes, Stichorchis subtriquetrus in the caecum and colon, respectively. The flotation method revealed no ova from faecal material. The European beaver was present in the territory of Slovenia until the beginning of the 18th century. Recently, in 1998, the species reappeared in southeast of Slovenia as a result of the reintroduction of European beaver in Croatia. This is the first report of veterinary examination of beaver and the first evidence of S. subtriquetrus in Slovenia.

Parole chiave

  • European beaver
  • Stichorchis subtriquetrus
  • Slovenia
Accesso libero

Use of modified McMaster method for the diagnosis of intestinal helminth infections and estimating parasitic egg load in human faecal samples in non-endemic areas

Pubblicato online: 25 Apr 2009
Pagine: 62 - 64

Astratto

Abstract

A modified McMaster method has been used for the diagnosis and estimating helminth egg load in human faecal samples obtained from random consecutive patients in the areas non-endemic for helminth infections (Slovak Republic, North West Russia). Both positive and negative findings were in a 100 % concordance to those obtained with a reference method accepted in clinical diagnostic laboratories (microscopy of the native stool smear). The McMaster method was efficient in detecting nematode eggs in patients’ stool samples with egg load varying from very low (15–60 epg for T. trichiura) to moderate (1650–4500 epg for A. lumbricoides). Therefore, this method may be successfully (and with a better technical feasibility) used for the diagnosis of intestinal helminth infections in non-endemic areas, with further quantitative analysis of the sample when required.

Parole chiave

  • McMaster method
  • helminth eggs
  • human faecal samples
  • diagnosis
  • non-endemic area
Accesso libero

Birthday anniversary of Prof. D.V.M. Pavol Dubinský, D.Sc.

Pubblicato online: 25 Apr 2009
Pagine: 65 - 66

Astratto

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