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| Registros recuperados: 53 | |
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| Thapa, Sundar; Meyling, Nicolai V.; Katakam, Kiran Kumar; Thamsborg, Stig Milan; Mejer, Helena. |
| Thick-shelled eggs of animal-parasitic ascarid nematodes can survive and remain infective in the environment for years. The present study was conducted to assess the effect of two species of soil microfungi (Pochonia chlamydosporia and Purpureocillium lilacinum) on the development and survival of eggs (all of faecal origin) of three ascarid species, Ascaridia galli (chicken roundworm), Toxocara canis (canine roundworm) and Ascaris suum (pig roundworm), in vitro. Ascarid eggs were embryonated on water agar with or without one fungal species, and viability of the eggs was evaluated on days 7, 14, 21, 28, 35 and 42 post set up (p.s.). By day 14 p.s., P. chlamydosporia had reduced the viability of A. galli and T. canis eggs by 70-86% and 52-67%, respectively,... |
| Tipo: Journal paper |
Palavras-chave: Health and welfare. |
| Ano: 2014 |
URL: http://orgprints.org/27341/7/27341.pdf |
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| Mejer, Helena. |
| Spolormen er en parasit, der lever i tarmkanalen og er udbredt i alle egne af verden, hvor der holdes grise. Spolormen kan være et problem, fordi den kan påvirke grisens tilvækst, foderforbrug og sundhed. Et igangværende treårigt Organic RDD projekt (PAROL) arbejder derfor på at kortlægge smitten i fem danske besætninger, for at forbedre rådgivningen omkring kontrollen af spolorm. |
| Tipo: Newspaper or magazine article |
Palavras-chave: Health and welfare. |
| Ano: 2012 |
URL: http://orgprints.org/22097/7/22097.pdf |
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| Gautam, Susmita; Petkeviciute, Egle; Takeuchi-Storm, Nao; Thapa, Sundar; Mejer, Helena. |
| Ascaris suum and Ascaridia galli, the large round worm of pigs and poultry, respectively, persist even in intensive management systems, where a high level of hygiene is practiced. It is necessary to control these helminths to minimize production losses and improve animal welfare. Commercial disinfectants are commonly used to clean pens in conventional pig and poultry farms but their efficacy against the thick-shelled nematode eggs has not been sufficiently documented. However, it might be difficult to control these parasites because of their complex thick-shelled eggs, which can resist harsh environmental conditions. Commonly used disinfectants such as Virkon S®, FL-des GA® typically claim efficacy against viruses, bacteria and some fungi, but very few... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Health and welfare. |
| Ano: 2014 |
URL: http://orgprints.org/27348/7/27348.pdf |
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| Katakam, Kiran Kumar; Thamsborg, Stig Milan; Dalsgaard, Anders; Mejer, Helena. |
| Although Ascaris suum is the most common nematode in pig farms, the on-farm transmission dynamics is not well described. Hence we performed a 1-year field study on organic pig farms, mapping egg contamination levels in pens and on pastures (dry sows, lactating sows and starters) and infection levels in animals. In conclusion, recovery of infective eggs was limited in deep litter compared to shallow litter, but many deep litter eggs were still viable. A. suum transmission takes place both indoors and outdoors. Highly infective bedding material should be stored, composted or treated before spreading on crops and never used for pastures. |
| Tipo: Journal paper |
Palavras-chave: Health and welfare. |
| Ano: 2014 |
URL: http://orgprints.org/27394/7/27394.pdf |
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| Mejer, Helena; Andersen, Stefan; Roesptorff, Allan. |
| Background: Helminths are common in European organic pig production systems and the use of deep-litter has long been considered a serious risk factor contributing to this problem. However, until now hardly any data has existed to either support or reject this hypothesis, thus complicating formulation of farmer guidelines. Methods: On an organic Danish pig farm, 3 different areas (latrine, resting area and the area in-between) of 2 indoor fattening pens with deep-litter (min. 2 months old) were examined for Ascaris suum and Trichuris suis eggs. The deep-litter was sampled vertically 10, 20, 30, 40, 50, and 60 cm from the surface, by pooling 4 sub-samples per level. In addition, eggs were isolated from the top, middle, and bottom of deep-litter (3-4... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Health and welfare; Pigs. |
| Ano: 2011 |
URL: http://orgprints.org/20003/2/20003.pdf |
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| Mejer, Helena; Roepstorff, Allan. |
| De fleste almindelige indvoldsorm i danske svin er helt afhængige af værtsdyrenes nærmiljø, fordi en del af deres livscyklus skal gennemføres uden for værtsdyret. Ormene udskiller æg, som deponeres med værtens gødning i dennes omgivelser, hvor æggene dernæst udvikler sig til mere eller mindre hårdføre infektive stadier, som enten kan gensmitte værten eller smitte nye værtsdyr. Danske svin er gennem mange år blevet koncentreret i stadig større og mere intensive besætninger. Sammen med en udbredt brug af medicinering har dette forårsaget en markant reduktion i forekomsten og intensiteten af parasitter. Den økologiske driftsform, hvor forebyggende medicinsk behandling ikke er tilladt, og hvor dyrene skal have rigelig strøelse og adgang til udendørs... |
| Tipo: Report chapter |
Palavras-chave: Pigs; Health and welfare. |
| Ano: 2004 |
URL: http://orgprints.org/3243/1/3243.pdf |
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| Mejer, Helena; Roepstorff, Allan; Thamsborg, Stig Milan; Lydehøj Hansen, Laurits; Bach Knudsen, Knud Erik. |
| Two similar trials were carried out to examine how dietary inclusion of an easily fermentable carbohydrate source such as chicory roots (Cichorium intybus) may effect established and establishing helminth infections in pigs. In the first trial varying feeding periods with crude chicory roots naturally rich in fructans (primarily inulin) were tested whereas crude chicory roots were compared with dried chicory roots and purified inulin in the second trial. In both trials pigs were infected with 3000 O. dentatum L3-larvae while fed a traditional standard diet. When the infections were well established and patent, experimental diets were introduced and the faecal egg counts monitored. Two weeks before the pigs were slaughtered all animals were infected with... |
| Tipo: Journal paper |
Palavras-chave: Pigs; Health and welfare. |
| Ano: 2005 |
URL: http://orgprints.org/4523/1/4523.pdf |
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| Petersen, Heidi Huus; Mejer, Helena; Jianmin, Wang; Katakam, Kiran Kumar; Thamsborg, Stig Milan; Dalsgaard, Anders; Olsen, Annette; Enemark, Heidi L.. |
| Pigs are potential sources of contamination with Cryptosporidium spp., which can lead to infection in humans. Cryptosporidiosis in humans is primarily caused by two species, C. hominis and the zoonotic C. parvum, however, other species including C. suis and C. scrofarum are able to cause zoonotic infection. The oocysts can survive for long periods in the environment and are able to resist most disinfectants. In order to estimate the prevalence of Cryptosporidium spp. in organic pigs and to improve knowledge of the epidemiology, the oocyst excretion was monitored at quarterly intervals during the period September 2011 to June 2012 in each of three organic, Danish pig farms. Faecal samples for examination of Cryptosporidium spp. were collected from 994 pigs... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Health and welfare. |
| Ano: 2013 |
URL: http://orgprints.org/27379/7/27379.pdf |
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| Jensen, Annette Nygaard; Mejer, Helena; Mølbak, Lars; Langkjær, Maria; Jensen, Tim Kaare; Angen, Øystein; Martinussen, Torben; Klitgaard, Kirstine; Baggesen, Dorte Lau; Thamsborg, Stig Milan; Roepstorff, Allan. |
| The restrictions on the use of antibiotic and anthelmintic treatments in organic pig farming necessitate alternative non-medical control strategies. Therefore, the antibiotic and parasite-reducing effect of a fructan-rich (prebiotic) diet of dried chicory was investigated in free-ranging piglets. Approximately half of 67 piglets from 9 litters were experimentally infected with Ascaris suum and Trichuris suis in the suckling period (1 to 7 weeks of age) and 58 of the piglets were challenged daily with E. coli O138:F8 for 9 days after weaning to induce weaning diarrhoea. The litters were fed either chicory (30% DM) or a control diet. The effect of chicory on intestinal helminths, intestinal microbiota, especially Bifidobacteria and Campylobacter spp., and E.... |
| Tipo: Journal paper |
Palavras-chave: Health and welfare. |
| Ano: 2010 |
URL: http://orgprints.org/18118/1/18118.pdf |
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| Roepstorff, Allan; Mejer, Helena; Nejsum, Peter; Thamsborg, Stig Milan. |
| Helminths in pigs have generally received little attention from veterinary parasitologists, despite Ascaris suum, Trichuris suis, and Oesophagostomum sp. being common worldwide. The present paper presents challenges and current research highlights connected with these parasites. In Danish swine herds, new indoor production systems may favour helminth transmission and growing knowledge on pasture survival and infectivity of A. suum and T. suis eggs indicates that they may constitute a serious threat to outdoor pig production. Furthermore, it is now evident that A. suum is zoonotic and the same may be true for T. suis. With these ‘new’ challenges and the economic impact of the infections, further research is warranted. Better understanding of... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Production systems; Health and welfare; Pigs. |
| Ano: 2011 |
URL: http://orgprints.org/20238/3/20238.pdf |
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| Roepstorff, Allan; Mejer, Helena; Thomsen, Lisbeth E.; Thamsborg, Stig M.; Byrne, Derek V.; Hansen, Laurits L.; Bach Knudsen, Knud Erik; Møller, Kristian. |
| Sukkerstoffet inulin er kendt for at kunne nedsætte dannelsen af skatol hos svin. Det skyldes at inulin ændrer tarmfloraen, så bakterier der danner skatol bliver holdt i skak. Samtidig bevirker den ændrede tarmflora at grisene får færre indvoldsorm. Inulin er imidlertid for dyrt til, at det kan betale sig at bruge det i svinefoder. Cikorierødder indeholder inulin og en række andre kulhydrater plus sekundære metabolitter. Derfor har vi undersøgt om cikorierødder kan erstatte ren inulin og derigennem mindske ornelugten, forbedre smagen og nedsætte grisenes smitte med sygdomsfremkaldende parasitter og bakterier. |
| Tipo: Journal paper |
Palavras-chave: Health and welfare; Feeding and growth. |
| Ano: 2005 |
URL: http://orgprints.org/9368/1/9368.pdf |
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| Thamsborg, Stig; Mejer, Helena; Roepstorff, Allan. |
| Background: Recent studies with sheep have indicated an anti-nematodal effect of several leguminous plants, possibly associated with a high content of condensed tannins. In search for suitable local plants, an experiment was performed under Danish conditions. Method: Four 0.3 ha plots were established with pure stands of sulla (Hedysarum coronarium), white clover, sainfoin (Onybrychus viciifolia) and chicory (Cichorium intybus). Five or six parasite naive lambs were grazed for 7 weeks on each plot with repeated moves to avoid reinfection. Lambs were infected 6 times during the first 3 weeks with Ostertagia circumcincta and Trichostrongylus vitrinus, receiving a total of 42,000 L3 of each species. Results: The lambs grew at similar rates on white... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Health and welfare. |
| Ano: 2001 |
URL: http://orgprints.org/4517/1/4517.doc |
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| Roepstorff, Allan; Mejer, Helena; Nejsum, Peter; Thamsborg, Stig Milan. |
| Helminths in pigs have generally received little attention from veterinary parasitologists, despite Ascaris suum, Trichuris suis, and Oesophagostomum sp. being common worldwide. The present paper presents challenges and current research highlights connected with these parasites. In Danish swine herds, new indoor production systems may favour helminth transmission and growing knowledge on pasture survival and infectivity of A. suum and T. suis eggs indicates that they may constitute a serious threat to outdoor pig production. Furthermore, it is now evident that A. suum is zoonotic and the same may be true for T. suis. With these ‘new’ challenges and the economic impact of the infections, further research is warranted. Better understanding of host–parasite... |
| Tipo: Journal paper |
Palavras-chave: Health and welfare; Pigs. |
| Ano: 2011 |
URL: http://orgprints.org/20008/4/20008.pdf |
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| Registros recuperados: 53 | |
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