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Early disease detection for weaned piglet based on live weight, feeding and drinking behaviour

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Michel Marcon et al., 70th Annual Meeting of the European Federation Animal Science (EAAP), 26-30 août 2019, Gand, Belgique, visuels d'intervention

Early disease detection is one of the key to effective disease control in farms and reducing antibiotics usage. A batch of 153 weaned piglets was used to test a first machine learning algorithm in order to predict the individual health state of each animal. In order to build the early disease detection algorithm, nine boxes of 17 piglets has been set up with automata. In real time within this section we knew the number of times each animal went to the drinker or the feeder, the quantity of water and feed it took and its weight. As the golden standard to know either a piglet seems healthy or not, the clinical signs will be observed by trained operators on each pig every workday and recorded on a standardized grid (diarrhoea, cough, lameness…). Then, data collected from this batch of 153 piglets were used to create an algorithm with the software R, based on bagging and random forest machine-learning method. The database was split into learning (70%) and testing (30%). We obtained a global success of 86% of good prediction. 
In order to validate the accuracy of the model, a second batch of 153 piglets was used. Every day, a list of predicted sick pigs was printed automatically, indicating the individual identification of the animal, and its pen. Then, the results of these predictions were compared with the golden standard (observations of clinical signs by trained operators). Out of 3,437 observations (including predictions that the piglet is not sick), the algorithm correctly predicted the status of the piglets 2,462 times. Artificial intelligence has made 72% of good predictions. Regarding the true positive results, 96 alerts out of 117 were actually associated with observations of animals suffering mainly
from diarrhoea within two days (82% of success). Now, the aim is to improve this algorithm in different ways: to test accelerometers to check the activity of each piglet; to be more accurate on recording cough by a microphone (SOMO, Soundtalks); to test if some trajectories of behavioural change are linked to specific diseases (lameness, digestive or respiratory disease) and not only to generic disease. These studies will be part of the Healthylivestock project (EC funded H2020 research project).

PDF icon Mchel Marcon et al., 70th EAAP, 26-30 août 2019, Gand, Belgique
2019

Effect of a beneficial flora colonization of pen surfaces on health and performance of pig weaners

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Eric Royer (ancien Ifip, aujourd'hui Idele) et al., 70th Annual Meeting of the European Federation of Animal Science (EAAP), 26-30  août 2019, Gand, Belgique, visuels d'intervention

The objective was to test the effects of a positive biofilm formation on the surfaces of post-weaning piglet facilities.
In total, 494 piglets were used in two experiments using a sanitary challenge. 48 h (d-2) before introduction of piglets, 2 identical rooms of 14 pens were sprayed either with water (Control) or a mix (LP) of selected bacteria strains.
Rooms were exchanged between Exp.1 and Exp.2. In Exp.1 rooms were sprayed again at d 15 and in Exp.2 at d 5, 12, 19, 26 and 33. Environmental challenge for piglets was stronger in Exp.1 than in Exp.2. Wiping samples indicated significantly (P<0.05) higher loads of aerobic bacteria (Lactobacillus spp., Bacillus spp.) in LP pen surfaces in Exp.1 at d 0, 5, and 14 and at d 0, 5, 7 and 35 in Exp.2, suggesting the development of the positive biofilm. Percentage of piglets with regular consistency of faeces was continuously higher in LP rooms in Exp.1 (from d 8 to 21) and Exp.2 (from d 5 to 28). Furthermore, mean scores were significantly improved at d 8 in Exp.1 (3.13 vs 4.50; P<0.01) and in Exp.2 at d 9 (2.19 vs 3.19; P=0.01) and 28 (2.03 vs 2.50; P<0.01). Disease outbreaks occurred two days later in Exp.1 (d 9 vs 7) and five days later in Exp.2 (d 12 vs 7) in LP rooms. However, total numbers of deaths from diarrhoea were similar in both treatments in Exp.1 and 2. In Exp.1, LP piglets had numerically better overall ADFI (794 vs 781 g/d; P>0.10) and ADG (510 vs 499 g/d; P>0.10), and had slightly higher weight at d 42 (29.8 vs 29.4 kg; P>0.10). In Exp.2, ADFI (259 vs 219 g/d; P<0.001) and ADG (211 vs 154 g/d; P<0.001) were significantly increased in the LP treatment in phase 1 (d 0 to 15). Weight was significantly higher for LP piglets at d 15 (11.9 vs 11.0 kg; P<0.001), although it was similar at d 41 (P>0.10). In conclusion, the spraying of a beneficial flora on surfaces may result in a protective positive biofilm that would help the piglets to deal better with the weaning challenges.

PDF icon Eric Royer (ancien IFIP, aujourd'hui Idele) et al., 70th EAAP, 26-30 octobre 2019, Gand, Belgique
2019

Livestock farming systems and the French society: key controversies

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Elsa Delanoue, sociologue (Idele, Ifip, Itavi), 70th Annual Meeting of the European Federation Animal Science (EAAP), 26-30 août 2019, Gand, Belgique, visuels d'intervention

For several years, French livestock farming has been frequently questioned by society. Those questions concern its environmental impact, sanitary risks or animal treatment and ask, more generally, livestock farming’s place among a society that is more and more concerned about its alimentation. To understand this phenomenon, analyse representations on livestock farming that coexist within the society and enlighten agricultural actors on those social evolutions at work, the project ACCEPT, funded by the CASDAR and led by the French Pork and Pig Institute (IFIP), has been carried out between 2014 and 2018. With the aim of identifying the subjects of controversy about breeding in France, all animal productions considered, and to describe the diversity of actors and arguments, both qualitative and quantitative studies were conducted: around seventy interviews were conducted, in France and five other UE countries, with the main stakeholders (livestock farming professionals, farmers, companies, journalists, NGOs, consumers) and more than 2007 French citizens were questioned on a online survey. The analysis of discourses led to classify the debates on the French livestock farming in four major areas: environmental impact, animal welfare, risks to human health and socioeconomic model of livestock farming. It reflects expectations for different types of system: some want a gradual disappearance of intensive farming systems for the benefit of under official quality signs or implementing alternative practices; others want the development of intensive farming to produce more and become more competitive; and between them many want a gradual improvement in the intensive system, with stronger environmental and animal welfare requirements. We consider that we face a global controversy on livestock farming: indeed, beyond specific controversies on practices, debates regarding the very legitimacy of livestock farming or the consumption of animal products gather all the different topics, and are linked with larger society problematics (consumption habits, growth models, globalization, etc.). This feature may complicate the resolution of the controversy and make it hazardous and longer.

PDF icon Elsa Delanoue, sociologue (Idele, Ifip, Itavi) et al., 70th EAAP, 26-30 août 2019, Gand, Belgique
2019

Attitudes of Eastern European consumers towards surgical castration and immunocastration of piglets

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Igor Tomasevic (University of Belgrade, Faculty of Agriculture, Belgrade, Serbia) et al., 65th International Congress of Meat Science and Technology (ICOMST), 4-9 août 2019, Potsdam/Berlin, Allemagne, p. 12-13, poster

Castration of male piglets is a common practice in pig husbandry performed to avoid boar taint, an offensive odour connected mainly with the presence of skatole and androstenone (Claus, Weiler, & Herzog, 1994) that can be perceived during the cooking and/or heating of pork from uncastrated male pigs. Taking into account relatively high animal welfare standards and discrepancy in public interest in farm animal welfare and ethical issues across European countries, generalisation of findings from Western European consumer studies to Eastern European countries would be quite questionable.

Evenmore so because a general insight into Eastern European meat consumers’ perceptions and behaviour is largely unavailable (Font-i-Furnols & Guerrero, 2014), except for a few studies published recently (Tomasevic et al., 2018). The aim of this research was to investigate the attitudes of Eastern European consumers regarding surgical and immuno-castration.

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2019

Drivers of (dis)liking: Systematic pairwise preference tests to reveal the relationship between boar taint and consumer acceptance

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Daniel Mörlain (University of Göttingen, Department of Animal Science) et al., 65th International Congress of Meat Science and Technology (ICOMST), 4-9 août 2019, Potsdam/Berlin, Allemagne, poster, p. 66-68

To improve animal welfare, in 2010 a European Declaration proposed a total ban on castration. Entire male pigs, however, can develop an off-odour, called boar taint. To prevent consumers complaints, a quantitative relationship of boar taint compounds (or intensity) with consumer dissatisfaction needs to be established. Pairwise preference tests (Prescott et al, 2005) were deemed a more straightforward approach than sequential monadic testing to establish rejection thresholds.

Document réservé Espace Pro, veuillez vous identifier
2019

Addition of vitamin E in pigs feed: could prevent cured-meat promotion of colon carcinogenesis in rats

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Aurélie Promeyrat et al., 65th International Congress of Meat Science and Technology (ICOMST), 4-9 août 2019, Potsdam/Berlin, Allemagne, poster

Based on epidemiological studies, excessive consumption of cured meats induces a slight, but significant, increase in the risk of developing colorectal cancer [1]. Among the various hypotheses, recent studies have proposed the central role of heme iron in this positive association. Heme iron catalyzes the formation of genotoxic and cytotoxic nitroso-compound (NOCs) and lipid peroxidation end products (alkenals). Based on the important role of peroxidation and nitrosylation in the effect on cancer risk, our recent studies has made possible to propose a limitation of this effect via the enrichment of cured meat products with vitamin E during their manufacture [2]. In addition, supplementation in pig diet would also appear interesting to protect cured meat from the formation of carcinogenic substances, NOCs and alkenals [3]. In the present study we assess for the first time the effect of adding vitamin E in pig feed on preventing the promotion of colorectal carcinogenesis in rats fed a sausage-based diet from supplemented animals compare to sausage-based diet from control animals .

PDF icon Aurélie Promeyrat et al., 65th ICOMST, 4-9 août 2019, Potsdam/Berlin, Allemagne, poster, PDF icon Aurélie Promeyrat et al., 65th ICOMST, 4-9 août 2019, p. 859-860
2019

Addition of algae in pig feed: influence on technological quality and composition of meat and offal

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Aurélie Promeyrat et al., 65th International Congress of Meat Science and Technology (ICOMST), 4-9 août 2019, Potsdam/Berlin, Allemagne, poster

Nowadays, algae progressively emerges in farms as a new generation of natural ingredients that improves immune function and animal health [1].
But, what are the effects of algae addition on meat and offal ? This study assesses the impact of pork feed supplemented in algae on meat quality, its composition, including nutritional compounds in offal.

PDF icon Aurélie Promeyrat et al., 65th ICOMST, 4-9 août 2019, Potsdam/Berlin, Allemagne, poster, PDF icon Aurélie Promeyrat et al., 65th ICOMST, 4-9 août 2019, p. 726-727
2019

Influencing wavelength comparison in pls models for the prediction of pork meat quality by vis-nirs

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Antoine Vautier, 65th International Congress of Meat Science and Technology (ICOMST), 4-9 août 2019, Potsdam/Berlin, Allemagne, poster

For the needs of a running project dealing with hyperspectral imaging, we wanted to define the spectral range specifications of the device being built. The reference data we expect to predict on pork meat cover a wide diversity of parameters: pH, drip loss, cooking yield and intramuscular fat. In previous studies focusing on VIS-NIRS (Visible and Near Infra Red Spectroscopy) prediction of the meat quality, we mainly used the 350-1800 nm spectral range of a Labspec4 spectrometer (ASDI). Because this spectral range seems to be too wide for a single ready-to-use hyperspectral camera, we decided to take another look on our previous NIRS studies and investigate which wavelength are the most predictive. The objective was to make a comparison of the influencing wavelength that are included in the PLS prediction equations, for each of the meat quality parameters we had studied.

PDF icon Antoine Vautier, 65th ICOMST, 4-9 août 2019, Potsdam/Berlin, Allemagne, poster, PDF icon Antoine Vautier, 65th ICOMST, 4-9 août 2019, p. 523-524
2019

Santé des animaux : les limites de la sélection génétique face aux maladies

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Marie-José Mercat, Réussir Porc/ Tech Porc (FRA), 2019, n° 270, juillet-août, p. 44-45

Des leviers génétiques existent pour sélectionner des animaux résistants à certains variants d’agents infectieux comme E. coli.

Mais une résistance globale aux maladies, ou simplement à tous les variants d’E. coli, semble illusoire.

PDF icon Marie-José Mercat, Réussir Porc/ Tech Porc (FRA), 2019, n° 270, juillet-août, p. 44-45
2019

Evolution of steroid concentrations in saliva from immature to pubertal gilts for the identification of biomarkers of gilts receptivity to boar effect

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Gylène Goudet et al., Livestock science, 2019 volume 228, octobre, p. 5-17

Estrus synchronization is necessary for management of gilt reproduction in pig farms. It is usually achieved by using synthetic progestagens, but there is increasing demand for non-hormonal alternative tools with the prospect of sustainability of livestock production. Moreover, in organic farms, synthetic hormones are not allowed. Before reaching puberty, gilts exhibit a “waiting period” during which external stimulations, such as boar exposure, could trigger and synchronize the first ovulation. However, practical non-invasive tools for detection of the “waiting period” in pig farms are lacking. During this period, estrone levels in urine are high, but urine sampling is difficult in group-housed females. Our objective was to identify among steroids potential biomarkers of this “waiting period” through saliva monitoring from immature to pubertal gilts using gas chromatography coupled to tandem mass spectrometry.

Starting between 144 to 147 days of age, six Large White gilts were submitted to ultrasound puberty diagnosis 3 times a week until first ovulation. Urine and saliva samples were collected to analyze weekly estrone and steroidome respectively, until puberty. Urinary estrone concentration significantly increased 2 weeks before first ovulation occurring between 182 and 192 days of age. The period with increasing estrone levels was considered as the “waiting period”. Steroidome analysis allowed identifying and quantifying 28 steroids in 500 µl of gilts saliva. Significant decrease of dehydroepiandrosterone and significant increase of 5α-dihydroprogesterone and 17β-estradiol were detected 2 weeks before puberty, suggesting that these steroids could be potential biomarkers of the “waiting period”.

These results show that painless sampling of saliva could be a non-invasive welfare-friendly tool for the identification of the physiological hormonal status of the gilts and possibly the optimal time for application of the boar effect, a solution to synchronize puberty without exogenous hormones.

2019

Les meilleures pratiques d’élevage de mâles entiers décryptées

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Patrick Chevillon, Réussir Porc / Tech Porc (FRA), 2019, n° 270, juillet-août, p. 38-40

La commission européenne veut accompagner l’arrêt de la castration chirurgicale en finançant un guide des meilleures pratiques de production de mâles entiers.

PDF icon Patrick Chevillon, Réussir Porc / Tech Porc (FRA), 2019, n° 270, juillet-août, p. 38-40
2019

Les tests olfactifs s’imposent en abattoir

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Patrick Chevillon, Réussir Porc / Tech Porc (FRA), 2019, n° 270, juillet-août, p. 40

La détection en abattoir des carcasses malodorantes par des méthodes sensorielles est, pour le moment, la seule à être utilisée en Europe.

PDF icon Patrick Chevillon, Réussir Porc / Tech Porc (FRA), 2019, n° 270, juillet-août, p. 40
2019

Transformer un nourrisseur en distributeur de paille

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Valérie Courboulay, Réussir Porc / Tech Porc (FRA), 2019, n° 270, juilllet/ août, p. 42

L’Ifip a testé à sa statione Romillé des dispositifs pour faciliter la distribution de paille à des porcs charcutiers sur caillebotis.

PDF icon Valérie Courboulay, Réussir Porc / Tech Porc (FRA), 2019, n° 270, juilllet/ août, p. 42
2019

Application Smartphone : la ToolBox, une véritable "Boîte à outils"

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Michel Marcon, Porc Mag (FRA), 2019, n° 544, juillet-août, p. 27

L'Ifip propose aux éleveurs de porcs et à leurs techniciens une boîte à outils numériques utiles pour les aider à l'audit des bâtiments ou à la construction d'un élevage. Elle propose des solutions techniques pour le dimensionnement des bâtiments ou des diagnostics du chauffage et de la ventilation.

2019

Commerce mondial du porc : stabilité en 2018

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Elisa Husson, Baromètre Porc (FRA), 2019, n° 499, synthèse du mois, juillet-août, p. 8

En 2018, les relations commerciales entre les acteurs mondiaux ont été perturbées, impactant les échanges des produits du porc. La Chine, plus gros importateur, continue d’influer le commerce mondial du porc.

PDF icon Elisa Husson, Baromètre Porc (FRA), 2019, n° 499, synthèse du mois, juillet-août, p. 8
2019

Des contrastes régionaux entre l’élevage et l’abattage

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Bérengère Lécuyer, Réussir Porc / Tech Porc (FRA), 2019, n° 270, juillet-août, p. 14-15

Selon les régions françaises, les volumes abattus ne correspondent pas toujours au nombre de porcs produits. Cette situation refl ète des dynamiques de production et d’abattage contrastées.

PDF icon Bérengère Lécuyer, Réussir Porc / Tech Porc (FRA), 2019, n° 270, juillet-août, p. 14-15
2019

Centralisée ou salle par salle : les critères pour bien choisir sa ventilation

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Yvonnick Rousselière, Réussir Porc / Tech Porc (FRA), 2019, n° 270, juillet-août, p. 30-32

Une ventilation centralisée reste plus onéreuse qu’une ventilation en salle par salle. Mais elle permet de répondre à de nouvelles attentes émergentes : environnement, économie d’énergie, lavage d’air…

PDF icon Yvonnick Rousselière, Réussir Porc / Tech Porc (FRA), 2019, n° 270, juillet-août, p. 30-32
2019

Combiner amélioration de la qualité de l’air et expression des comportements d’investigation chez le porc en croissance

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Valérie Couboulay, Colloque RMT Bien-être animal, Strasbourg, 1-2 juillet 2019, poster

Progresser sur la question du bien-être en élevage de porcs, dans une approche One-Welfare, est l’enjeu de cette expérimentation. Il s’agit d’améliorer la qualité de l’air au bénéfice de l’homme et des animaux par la technique du lisier flottant, tout en favorisant l’expression des comportements d’investigation des porcs : la mise en place d’une couche d’eau en fond de préfosse favorise la solubilisation de l’ammoniac et augmente le volume d’effluents ce qui pourrait permettre une bonne évacuation de la paille distribuée en brins courts, favorisant ainsi son utilisation en élevage.

PDF icon Valérie Couboulay, Colloque RMT Bien-être animal, Strasbourg, 1-2 juillet 2019, poster
2019

Reducing the dietary protein content of the weaning diet

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Didier Gaudré et al., ZeroZincSummit, 17-18 juin 2019, Copenhagen, Danemark, poster

Considering the interest of dietary protein reduction as a valuable alternative to the use of antibiotics and therapeutic zinc oxide at weaning, its consequences on pig performance during the few weeks after weaning were studied. The reduction of the digestible lysine content induced by diet protein reduction at weaning was observed in a fi rst trial. The second trial compared, three associations of raw concentrated protein materials in a context of a low protein and digestible lysine diet contents and a control diet in normal and degraded rearing conditions.

PDF icon Didier Gaudré et al., ZeroZincSummit, 17-18 juin 2019, Copenhagen, Danemark, poster
2019

Transport des porcs : des mesures de biosécurité renforcées

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Isabelle Corrégé, Porc Mag (FRA), 2019, n° 543, juin, p. 29

Dans la continuité des exigences de biosécurité définies au niveau des élevages, le nouvel arrêté du 29 avril 2019 fixe des mesures pour lutter contre la propagation des maladies dont la Fièvre porcine africaine, lors du transport des porcs.

2019

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