References of "Laitat, Martine"
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See detailPrévalence du virus du SDRP dans les élevages porcins
Czaplicki, Guy; Thilmant, Pierre; Van Der Stede, Yves et al

Poster (2015, February)

Porcine reproductive and respiratory syndrome (PRRS) causes major economic losses in pig farms. In different parts of the world, there is growing consensus that PRRS virus (PRRSv) eradication should be ... [more ▼]

Porcine reproductive and respiratory syndrome (PRRS) causes major economic losses in pig farms. In different parts of the world, there is growing consensus that PRRS virus (PRRSv) eradication should be performed on a regional basis, particularly in low density areas of pig production. The objective of the present study was to evaluate the apparent prevalence of PRRSv in Wallonia, a low density area of pig production (0.05 pig farms/km²). A phone survey was addressed to 173 of the 276 Walloon breeding pig owners. One hundred and thirty‐two farmers answered the questionnaire and serological tests were performed in 113 herds. If no vaccination was carried out on sows or on piglets, an Elisa test was performed on 10 breeding and/or 5 feeder pig serum samples collected between November 2011 and December 2012. An individual result was considered negative if the s/p ratio was <0.4; a herd was considered positive if an s/p ratio ≥0.4 was obtained by at least one of its pigs. Globally, at herd level and at animal level, the apparent prevalences were respectively 48% (IC95%: 39 – 57%) and 32 % (IC 95%: 29 – 35%). The present study has shown that half the Walloon breeding pig farms are serologically positive for PRRSv. Such prevalence in an area of low pig production supports the project for a regional PRRS control program. [less ▲]

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See detailLordose et/ou xyphose chez le porc : mise à l’épreuve de l’hypothèse héréditaire
Laitat, Martine ULg; Veillat, Emilie; Van Cauwenberge, Henry et al

Poster (2015, February)

Lordosis and/or kyphosis, also called ”dipped shoulder” or ”humpy‐back” is sporadically observed in growing pigs. This condition is characterized by a thoracic and/or lumbar spinal deformity ... [more ▼]

Lordosis and/or kyphosis, also called ”dipped shoulder” or ”humpy‐back” is sporadically observed in growing pigs. This condition is characterized by a thoracic and/or lumbar spinal deformity. Pathomorphologically, it may be comparable with Scheuermann’s kyphosis in man and so constitutes a spontaneous model for this humane kyphosis of the thoracic or thoracolumbar spine. In pigs, this condition may decrease the value of carcasses, making deboning efforts challenging. Three major and non‐exclusive hypotheses formulated to explain these back deformations are nutrition, intrauterine viral infection and inherited predisposition. The objective of the present study was to test the latter and, if possible, to identify a locus (some loci) associated with the affection. Forty‐eight pigs were included in this case‐control study. Based on a clinical examination and/or on a measure of the degree of spinal deformity, 25 pigs classified as affected were compared to 23 pigs considered as normal. A whole genome Single Nucleotide Polymorphism (SNP) analysis was performed using a 50,000 SNP array. DNA from forty‐seven samples (tail tissue or blood) was extracted while one sample was eliminated because of its poor quality. After applying quality controls, 40 pigs and 57,838 SNPs (on a total of 62,163) remained for further analysis. One SNP (ASGA0090747) located on Sus scrofa chromosome SSC8 crossed the genome‐wide significant threshold and is thus suspected of being associated with the lordosis and/or kyphosis phenotype. These results seem to confirm the hereditary hypothesis. Further investigations are however needed to confirm the suspected association. [less ▲]

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See detailInfluence of sugar beet pulp on feeding behavior, growth performance, carcass quality and gut health of fattening pigs.
Laitat, Martine ULg; Antoine, Nadine ULg; Cabaraux, Jean-François ULg et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2015), 19(1), 20-31

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See detailEffects of a high-fibre diet on ammonia and greenhouse gas emissions from gestating sows and fattening pigs
Philippe, François-Xavier ULg; Laitat, Martine ULg; Wavreille, José et al

in Atmospheric Environment (2015), 109

This study aims to measure under barn conditions the emissions of NH3, N2O, CH4 and CO2 associated with gestating sows (trial 1) and fattening pigs (trial 2) fed either a control diet (CTD) based on ... [more ▼]

This study aims to measure under barn conditions the emissions of NH3, N2O, CH4 and CO2 associated with gestating sows (trial 1) and fattening pigs (trial 2) fed either a control diet (CTD) based on cereals or a high-fibre diet (HFD) based on sugar beet pulp (SBP). Three successive batches of 10 Belgian Landrace gestating sows were used for trial 1. Two successive batches of 24 Pi etrain Belgian Landrace fattening pigs were used for trial 2. Animals were kept on slatted floor. The gas emissions were measured by infrared photoacoustic detection and expressed per day and per livestock unit, equals to 500 kg body weight. Similar trends were observed for both animal types. With HFD, the NH3 emissions were reduced (27.2 vs. 36.5 g for the gestating sows, P < 0.001; 23.2 vs. 45.0 g for the fattening pigs, P < 0.001) but the CH4 emissions were increased (41.5 vs. 21.0 g for gestating sows, P < 0.001; 37.9 vs. 27.2 g for fattening pigs, P < 0.001). The fibre content of the diet had not significant impact on N2O emissions (around 1.4 g for gestating sows and 2.1 g for fattening pigs, P > 0.05), and on CO2 emissions (around 6.0 kg for gestating sows and 9.1 kg for fattening pigs, P > 0.05). Most of manure parameters did not statistically differ regarding the treatment. Reproductive performance and body condition of the sows were not affected by the diet. However, growth performance and carcass traits of the HFD-fed fattening pigs were deteriorated compared to CTD. [less ▲]

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See detailA case of trichurosis in gilts and fattening pigs
Caron, Yannick ULg; Delleur, Valery ULg; Cassart, Dominique ULg et al

in JMM Case Reports (2014)

Trichuris suis, also called whipworm, is a parasite of the caecum and colon distributed widely and considered as a fairly common parasite in swine. It may be responsible for porcine trichurosis ... [more ▼]

Trichuris suis, also called whipworm, is a parasite of the caecum and colon distributed widely and considered as a fairly common parasite in swine. It may be responsible for porcine trichurosis characterized by diarrhoea, anorexia, growth retardation, dehydration, emaciation and anaemia. This report presents a case of trichurosis diagnosed in a farrow-to-finish Belgian pig herd. The infection was associated with severe and persistent diarrhoea, growth retardation, emaciation and/or anaemia in 10 recently purchased gilts and in fattening pigs. In gilts, levamisole [8 mg/kg body weight] administered once per os gave a good clinical response, as diarrhoea resolved in nine gilts out of 10. In parallel, for these nine gilts, the number of eggs of T. suis/g faeces passed decreased from 12 400 to less than 100 eggs. In fattening pigs, flubendazole (1 mg/kg BW) administrated over 5 days in drinking water allowed a reduction in the number of T. suis eggs/g and was effective against diarrhoea. Although most of the time pig whipworm infections are light and asymptomatic, in some cases when large numbers of worms are present, they can cause watery to bloody diarrhoea that can lead to anaemia. This less frequent disease should not be forgotten in the differential diagnosis of persistent diarrhoea in growing pigs. [less ▲]

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See detailLordosis in pigs: testing the hereditary hypothesis.
Laitat, Martine ULg; Van Cauwenberge, H; Harmegnies, Natacha ULg et al

Poster (2014)

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See detailEffects of dietary fibre and floor type on greenhouse gas and ammonia emissions associated with gestating sows
Philippe, François-Xavier ULg; Laitat, Martine ULg; Wavreille, José et al

in Proceedings of the 1st FARAH Day, Faculty of Veterinary Medicine (Liège – Belgium) (2014)

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See detailA clinical case of congenital tremors in piglets without evidence of PCV-1 and PCV-2
wavreille; Simon, Fanny (Co-first author); Servais, Vincent et al

Poster (2013, May 22)

Congenital tremor (CT) is a disease of newborn pigs characterized by spontaneous clonic contractions of one or more groups of voluntary muscles. Besides suspected or confirmed etiologies of CT such as ... [more ▼]

Congenital tremor (CT) is a disease of newborn pigs characterized by spontaneous clonic contractions of one or more groups of voluntary muscles. Besides suspected or confirmed etiologies of CT such as classical swine fever virus, pseudorabies virus, Japanese encephalomyelitis virus, hereditary disorders in Landrace or Saddleback pigs, organophosphorus poisoning etc., porcine circovirus (PCV) has been described as a potential cause of CT. The type AII seems to be the most common form of CT. Although a potential association between PCV1 or PCV2 and CT-AII has been observed, about 50% CT cases described up till now are caused by unknown reasons. In a PCV-seropositive 108-sow, farrow-to-finish Belgian pig farm breeding hyperprolific Landrace, 42 litters with shaking piglet(s) were reported since June 2006. On March 2012, piglets born from four sows of a 27 sow batch demonstrated CT. After exclusion of main etiologies of CT from these CT-affected piglets, it was hypothesized that PCV1 or PCV2 could be the reason. Necropsies (n=8) and histopathology (n=3) were performed and no evidence of macroscopic or microscopic lesions were seen in cerebrum, cerebellum and spinal cord. Pre-suckled and post-suckled (after 3 days of colostrum uptake) serum samples were also collected from 9 piglets to determine PCV1- and PCV2-specific Ab titres by an immuno-peroxidase monolayer assay (IPMA). No PCV-specific Ab titres were observed in pre-suckled serum samples (≤40), whereas IPMA Ab titres of ≥640 were observed in post-suckled serum samples. Both PCV1 and PCV2 could not be isolated (<101.7 TCID50/g tissue) from 4 tested piglets (in heart, brain and lungs). The present results do not support the hypothesis that PCV1 or PCV2 are linked to CT in newborn piglets. [less ▲]

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See detailPrevalence of PRRS virus in Wallonia (Belgium)
Czaplicki, Guy; Thilmant, Pierre ULg; Hooyberghs, Josef et al

Poster (2013, May 22)

Porcine reproductive and respiratory syndrome (PRRS) causes major economical losses in pig farms. In different parts of the world, there is a growing consensus that PRRS virus (PRRSv) eradication should ... [more ▼]

Porcine reproductive and respiratory syndrome (PRRS) causes major economical losses in pig farms. In different parts of the world, there is a growing consensus that PRRS virus (PRRSv) eradication should be performed on a regional basis, particularly in low density areas of pig production. The objective of the present study was to evaluate the apparent prevalence of PRRSv in Wallonia, a low density area of pig production (0.05 pig farms/km²). At this stage of the study, a phone survey has been addressed to 61/276 Walloon breeding pig owners. Fifty-eight answered to the questionnaire: 51 are responsible of a farrow-to-finish farm, 6 of a farrowing farm and 1 of a PRRS-free boar station. In 35% of the tested farms, sows are vaccinated with a modified live virus (MLV) PRRS vaccine (n=11) or with a killed PRRS vaccine (n=9). In two farms, both sows and piglets are vaccinated with a MLV PRRS vaccine. Replacement gilts are purchased in 33% farms. Among the 38 farms raising replacement gilts, 39% purchase boar(s). Boar semen is purchased in 86% of the farms: 56% purchase only boar semen; 30% purchase both semen and boar(s) and 14% of farms only purchase boar(s). In 22/57 tested farms, clinical signs evocative of PRRSv infection were observed over the last 10 years. In 30 farms a PRRS diagnostic test was performed in the past with a positive result in 17. When the pig owner did agree and if no vaccination was carried out on sows or on piglets, a serological Elisa test was performed in 10 breeding pigs and/or 5 feeder pigs >70 kg (or in all available sera if a smaller number of pigs was present). Globally, at herd level and at animal level, the apparent prevalence were respectively 35.2% (95% CI: 23.0-47.4%) and 23.4% (95% CI: 20.1-26.6%). [less ▲]

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See detailPrévalence des cas de lymphadénite granulomateuse sous‐maxillaire chez des porcs abattus en Belgique
Vyt, Philip; Denoël, Joseph ULg; Cassart, Dominique ULg et al

Poster (2013, February 06)

In pigs the Mycobacterium avium complex (MAC) causes granulomatous lymphadenitis. Carcasses with such lesions must be detected, as parts of the affected carcasses and organs have to be condemned. These ... [more ▼]

In pigs the Mycobacterium avium complex (MAC) causes granulomatous lymphadenitis. Carcasses with such lesions must be detected, as parts of the affected carcasses and organs have to be condemned. These nontuberculous mycobacteria are opportunistic pathogens which have acquired an increasing importance in public health in recent decades due to their ability to cause lung diseases, lymphadenitis in children and systemic infections in immunocompromised patients ‐ even if the potential risk of infection of an immunocompromised person by MAC in the consumption of undercooked pork still has to be determined. The first objective of this study was to evaluate the prevalence of submandibular granulomatous lymphadenitis in pigs slaughtered in Belgium. Between August 2010 and September 2011, 16,211 carcasses were inspected by the same veterinarian in 2 slaughterhouses – one in Flanders, the other in Wallonia. Eighty‐six suspected cases of submandibular granulomatous lymphadenitis (0.53% of pigs; 95% Confidence Interval: 0.42‐0.65%) were identified, collected and submitted to histopathological (Ziehl‐Neelsen and haematoxylin‐eosin staining) and bacteriological (culture, PCR, molecular typing) tests. The second objective of the study was to characterize lesions and to identify the relative importance of MAC and Rhodococcus equi to explain the lesions. Mycobacterium avium subsp. hominissuis (MAH) was isolated from 6 lymph nodes (7.0%; 95% CI: 2.6‐14.6%) and Rhodococcus equi from 45 (52.3%; 95% CI: 41.3‐63.2%). The final objective of the study consisted in farm investigation to evaluate the possible source of contamination of pigs by MAH. Potential sources such as sawdust, water, wild birds and/or cattle were identified. [less ▲]

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See detailInfluence of the void percentage of the floor on ammonia and greenhouse gas emissions for group-housed gestating sows.
Philippe, François-Xavier ULg; Laitat, Martine ULg; Wavreille, José et al

in Proceedings of the 3rd Scientific Meeting of the Faculty of Veterinary Medicine (2013)

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See detailImpact of the amount of straw on emissions of ammonia and greenhouse gases associated with fattening pigs kept on deep litter
Philippe, François-Xavier ULg; Laitat, Martine ULg; Wavreille, José et al

in Proceedings of the 3rd Scientific Meeting of the Faculty of Veterinary Medicine (2013)

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See detailComparison of ammonia and greenhouse gases emissions associated to fattening pigs kept either on fully or partly slatted floor
Philippe, François-Xavier ULg; Laitat, Martine ULg; Wavreille, José et al

in Proceedings of the 3rd Scientific Meeting of the Faculty of Veterinary Medicine (2013)

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See detailEffect of a fibrous diet on growth performance, carcass characteristics and gut health of fattening pigs
Philippe, François-Xavier ULg; Antoine, Nadine ULg; Cabaraux, Jean-François ULg et al

in Proceedings of the 3rd Scientific Meeting of the Faculty of Veterinary Medicine (2013)

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See detailInfluence of permanent use of feeding stalls as living area on ammonia and greenhouse gas emissions for group-housed gestating sows kept on straw deep-litter
Philippe, François-Xavier ULg; Laitat, Martine ULg; Wavreille, José et al

in Livestock Science (2013), 155

In pig production, the interest for litter systems in relation with animal welfare and the ban by 2013 in the EU of individual accommodations for gestating sows could promote the group-housing of ... [more ▼]

In pig production, the interest for litter systems in relation with animal welfare and the ban by 2013 in the EU of individual accommodations for gestating sows could promote the group-housing of gestating sows on deep-litter. However, compared to slatted-floor systems, few data are available on the gaseous emissions associated with the different modalities of rearing sows on deep-litter. In this study, two modalities were compared: group housing on a 3 m2/sow deep-litter or on a 1.8 m2/sow deep-litter plus 1.2 m2/sow concrete floor. In both cases, sows were fed in individual feeding stalls (1.2 m2/stall) but the access was limited at feeding time in the first case and permanent in the second one. Three successive batches of 10 gestating sows were used. Each batch was divided into 2 homogeneous groups randomly allocated to one of two treatments: fully (3 m2/sow) or partly (1.8 m2/sow) straw-based deep-bedded floor. The groups were kept separately in two identical rooms with same volume and same surface, equipped with five individual feeding stalls in contact with a pen of either 9 or 15 m2 deep-litter. The feeding stalls were equipped with front feeding troughs and rear gates allowing or not permanent access to the stalls outside of feeding times. Between each batch, the pens were cleaned. In both rooms, ventilation was automatically adapted to maintain a constant ambient temperature. The gas emissions (nitrous oxide, methane, carbon dioxide, ammonia and water vapour) were measured 3 times (weeks 2, 5 and 8 of stay) during 6 consecutive days by infrared photoacoustic detection. Sow performance was not significantly affected by floor type. With sows kept on partly bedded floor, gaseous emissions were significantly greater for methane (12.76 vs. 9.90 g/d.sow; P<0.001), carbon dioxide (3.12 vs. 2.90 kg/d.sow; P<0.01) and water vapour (4.70 vs. 4.03 kg/d.sow; P<0.001), and significantly lower for nitrous oxide (3.14 vs. 6.12 g/d.sow; P<0.001) and CO2 equivalents (1.24 vs. 2.10 kg/d.sow; P<0.001) compared to sows housed on fully bedded floor. There was no significant difference for ammonia emissions (8.36 vs. 7.45 g/d.sow; P>0.05). From the present trial in experimental rooms, it can be concluded that keeping group-housed gestating sows on partly straw bedded floor with permanent access to the concrete feeding stalls compared to fully straw bedded floor did not significantly influence animal performance and NH3-emissions, and decreased CO2eq-emissions (-40%). This decrease was observed owing to an important decrease of N2O-emissions (-49%). [less ▲]

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See detailGaseous emissions from fattening pigs offered an ad libitum high-fibre diet and kept on fully slatted floor: preliminary results
Philippe, François-Xavier ULg; Laitat, Martine ULg; Wavreille, José et al

in Hassouna, Mélynda; Guingand, Nadine (Eds.) Emissions of Gas and Dust from Livestock (2012)

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See detailAmmonia emissions associated to slatted floor and bedded floor systems for fattening pigs and gestating sows
Philippe, François-Xavier ULg; Laitat, Martine ULg; Wavreille, José et al

in Hassouna, Mélynda; Guingand, Nadine (Eds.) Emissions of Gas and Dust from Livestock (2012)

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See detailGaseous emissions from fattening pigs offered an ad libitum high-fibre diet and kept on fully slatted floor: preliminary results
Philippe, François-Xavier ULg; Laitat, Martine ULg; wavreille, José et al

in Proceedings of the 2nd Scientific Meeting of the Faculty of Veterinary Medicine (Liège – Belgium) (2012)

According to the literature, the diet composition of livestock can influence polluting gas emissions from agriculture. The aim of this preliminary study was to measure gaseous emissions from fattening ... [more ▼]

According to the literature, the diet composition of livestock can influence polluting gas emissions from agriculture. The aim of this preliminary study was to measure gaseous emissions from fattening pigs offered an ad libitum high-fibre diet (HFD) and kept on fully slatted floor. A batch of 24 fattening pigs was divided into two homogeneous groups randomly allocated to a treatment: conventional cereals-based diet or sugar beet pulpbased diet (HFD). With HFD, a significant decrease of animal performance was observed (837 vs. 962 g for the average daily gain). With pigs offered HFD, gaseous emissions per pig were significantly lower for NH3 (-30%, 6.64 vs. 9.47 g/d; P<0.05) and significantly greater for CH4 (+40%, 6.46 vs. 4.60 g/d; P<0.05). The emissions of N2O (0.34 g/d), CO2equivalent (0.27 kg/d), CO2 (1.68 kg/d) were not significantly influenced by the diet. Due to a more important microbial activity with HFD, the lower NH3-emissions could be attributed to the shift of a part of excreted nitrogen from urine (as urea) to faeces (as protein form), and to a lower slurry pH explained by the increase of volatile fatty acid content. The higher CH4-emissions could be explained by a greater production in the digestive tract and in the slurry due to fibre fermentations. In conclusion, HFD allowed decreasing NH3- and increasing CH4-emissions. However, in terms of climate change, this increase was offset by the decrease of indirect N2O-emissions due to NH3-emission decrease, as indicated by the similar CO2equivalent-emissions in the two groups. [less ▲]

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