La base documentaire de l'IFIP

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Guide de bonnes pratiques de biosécurité pour le transport

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Isabelle Corrégé, Porc Mag (FRA), 2018, n° 534, septembre, p. 63

La première version du guide de bonnes pratiques de biosécurité pour le transport des porcs est maintenant disponible.

2018

Fiche PPA (fièvre porcine africaine)

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Depuis 10 ans, la fièvre porcine africaine s’étend géographiquement et est devenue européenne. Une vigilance toute particulière doit donc être accordée à cette maladie qui pénaliserait la filière porcine. Les porcs peuvent être contaminés par un contact direct avec des porcs infectés ou par ingestion de déchets alimentaires contenant de la viande de porc non transformée contaminée, ou des produits qui en sont issus. Les locaux contaminés, les véhicules, le matériel ou les vêtements peuvent aussi transmettre le virus à des animaux sensibles...

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2018

Développement de nouveaux outils haut débit pour l’évaluation précoce de la qualité de la viande de porc

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Visuels d'intervention présentés par Antoine Vautier, à la 7ème journée de restitution des programmes de R&D financés par le Casdar "Innovation et partenariat" et "Recherche finalisée et innovation", le 17 janvier 2018, Paris

PDF icon visuels de Antoine Vautier, journée CASDAR du 17 janvier 2018, Paris
2018

Filière porcine ukrainienne : Illusions perdues

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Baromètre Porc (FRA), 2018, n° 489, synthèse du mois, septembre, p. 8, par Boris Duflot

Avec son potentiel de productions végétales, ses faibles coûts de main d’oeuvre et une tradition de consommation de porc, l’Ukraine pouvait devenir un acteur majeur du commerce international. Mais la propagation de la peste porcine africaine empêche quasiment toute exportation, tandis que le marché intérieur s’est réduit depuis la crise politique et économique de 2014.

PDF icon Baromètre Porc (FRA), 2018, n° 489, synthèse du mois, septembre, p. 8, par Boris Duflot
2018

Dispositif de maîtrise des salmonelles dans la filière porcine française

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Le présent dossier décrit chaque pièce du dispositif français de maîtrise du danger Salmonella et la cohérence de son fonctionnement. Il présente les résultats de prévalence des salmonelles recueillis depuis 20 ans afin d’illustrer son efficacité et démontrer les garanties qu’il offre au consommateur et aux clients étrangers.
Ce dossier à la fois technique et communicant a vocation à aider les professionnels à démonter l’efficacité de l’ensemble de leurs actions auprès des parties prenantes et des clients export.

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2018

Essais interlaboratoires d'aptitude : composition de produits à base de viandes - rapport IC_2018_1

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L’Ifip (Institut du porc) a organisé en mars - juin 2018 le circuit inter-laboratoires IC_2018_1 sur la composition chimique de produits à base de viandes. 57 laboratoires ont participé à ce circuit. La coordination du présent essai d’aptitude est assurée par Martine Carlier (martine.carlier@ifip.asso.fr, tel 01 43 68 41 55).

PDF icon Martine Carlier, rapport ifip, juin 2018, 29 pages
2018

Computed tomography for comparing the lean meat content of different genotypes of entire male pigs

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Gérard Dumas et al., 64rd International Congress of Meat Science and Technology (ICOMST), 12–17 août 2018, Melbourne, Australie, poster

From July 2018 the EU reference for pig grading is the lean meat percentage (LMP) based on total dissection of a half-carcass. Dissection can be replaced by an unbiased computed tomography (CT) procedure. Daumas et Monziols (2018) developed a pan-European CT procedure for determining this LMP. The hypothesis is such a procedure could be applied on very lean carcasses, issued from entire males of purebred used as terminal sires in production. The aim of this paper is to test this CT procedure to assess the LMP differences between several lean genetic groups and the three halothane genotypes.

PDF icon Gérard Dumas et al., 64rd ICOMST, 12–17 août 2018, Melbourne, Australie, poster
2018

Early prediction of Semimembranosus ultimate pH with Raman spectroscopy of pig carcasses

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Antoine Vautier et al., 64rd International Congress of Meat Science and Technology (ICOMST), 12–17 août 2018, Melbourne, Australie, poster

The ultimate pH (pH24) is a crucial meat quality parameter in the pork meat industry, but its measurement time is still an issue for slaughterhouses due to difficulties to keep up the required 18h post mortem (pm) time minimum. Raman spectroscopy showed the potential to predict pH24 of Semimembranosus when performed during chilling at 60 to 120 minutes pm [1] and on the slaughter line at 30 to 60 minutes pm [2]. The objective of the study is to validate the accuracy of the 671 nm emission Raman device developed by Schmidt et al. [3] to predict pork meat quality on a French pork population at the end of the slaughter line (30 min pm). The ability to predict the “jambon cuit supérieur” cooking yield and slicing defects has also been tested.

PDF icon Antoine Vautier et al., 64rd ICOMST, 12–17 août 2018, Melbourne, Australie, poster
2018

TREASURE : Diversité des races locales de porcs et des systèmes de production pour des produits traditionnels de qualité élevée et des filières porcines durables

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Bénédicte Lebret (INRA), Marie José Mercat et Herveline Lenoir (IFIP),Salon International de l'Agriculture (SIA) 2018, 24 février-4 mars 2018, Paris, poster 

 

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2018

ECOALIM : améliorer les bilans environnementaux des élevages en optimisant leurs ressources alimentaires

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Visuels d'intervention de Sandrine Espagnol, Journée "CASDAR" du 17 janvier 2018

PDF icon Visuels d'intervention de Sandrine Espagnol, Journée "CASDAR" du 17 janvier 2018
2018

Ochratoxin A determination in swine muscle and liver from French conventional or organic farming production systems

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Vincent Hort (Anses) et al., Journal of Chromatography B, 2018, volume 1092, 15 août, p; 131-137

Consumers generally considered organic products to be healthier and safer but data regarding the contamination of organic products are scarce. This study evaluated the impact of the farming system on the levels of ochratoxin A (OTA) in the tissues of French pigs (muscle and liver) reared following three different types of production (organic, Label Rouge and conventional). Because OTA is present at trace levels in animal products, a sensitive ultra-high performance liquid chromatography-tandem mass spectrometry method using stable isotope dilution assay was developed and validated. OTA was detected or quantified (LOQ of 0.10 μg kg-1) in 67% (n = 47) of the 70 pig liver samples analysed, with concentrations ranging from <0.10 to 3.65 μg kg-1. The maximum concentration was found in a sample from organic production but there were no significant differences in the content of OTA between farming systems. OTA was above the LOQ in four out of 25 samples of the pork muscles. A good agreement was found between OTA levels in muscle and liver (liver concentration = 2.9 × OTA muscle concentration, r = 0.981).

2018

Population Genetic Structure of Listeria monocytogenes Strains Isolated From the Pig and Pork Production Chain in France

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Benjamin Félix (Anses) et al., Frontiers in Microbiology, 2018, n° 9, 6 avril, 11 pages

Listeria monocytogenes is an ubiquitous pathogenic bacterium, transmissible to humans through the consumption of contaminated food. The pork production sector has been hit hard by a series of L. monocytogenes-related food poisoning outbreaks in France. An overview of the diversity of strains circulating at all levels of the pork production chain, from pig farming (PF) to finished food products (FFP), is needed to identify the contamination routes and improve food safety. Until now, no typing data has been available on strains isolated across the entire pig and pork production chain. Here, we analyzed the population genetic structure of 687 L. monocytogenes strains isolated over the last 20 years in virtually all the French départements from three compartments of this production sector: PF, the food processing environment (FPE), and FFP. The genetic structure was described based on Multilocus sequence typing (MLST) clonal complexes (CCs). The CCs were obtained by mapping the PFGE profiles of the strains. The distribution of CCs was compared firstly between the three compartments and then with CCs obtained from 1106 strains isolated from other food production sectors in France. The predominant CCs of pig and pork strains were not equally distributed among the three compartments: the CC37, CC59, and CC77 strains, rarely found in FPE and FFP, were prevalent in PF. The two most prevalent CCs in the FPE and FFP compartments, CC9 and CC121, were rarely or never detected in PF. No CC was exclusively associated with the pork sector. Three CCs (CC5, CC6, and CC2) were considered ubiquitous, because they were observed in comparable proportions in all food production sectors. The two most prevalent CCs in all sectors were CC9 and CC121, but their distribution was disparate. CC9 was associated with meat products and food products combining several food categories, whereas CC121 was not associated with any given sector. Based on these results, CC121 is likely able to colonize a larger diversity of food products than CC9. Both CCs being associated with the food production suggests, that certain processing steps, such as slaughtering or stabilization treatments, favor their settlement and the recontamination of the food produced. 

2018

Selection procedure of bioprotective cultures for their combined use with High Pressure Processing to control spore-forming bacteria in cooked ham.

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Mihanta Ramaroson et al., International journal of food microbiology, 2018, voluime 276, 2 juillet, p. 28-38

High Pressure Processing (HPP) and biopreservation can contribute to food safety by inactivation of bacterial contaminants. However these treatments are inefficient against bacterial endospores. Moreover, HPP can induce spore germination. The objective of this study was to select lactic acid bacteria strains to be used as bioprotective cultures, to control vegetative cells of spore-forming bacteria in ham after application of HPP. A collection of 63 strains of various origins was screened for their antagonistic activity against spore-forming Bacillus and Clostridium species and their ability to resist to HPP. Some safety requirements should also be considered prior to their introduction into the food chain. Hence, the selection steps included the assessment of biogenic amine production and antibiotic resistance. No strain produced histamine above the threshold detection level of 50 ppm. From the assessment of antibiotic resistance against nine antibiotics, 14 susceptible strains were kept. Antagonistic action of the 14 strains was then assessed by the well diffusion method against pathogenic or spoilage spore-forming species as Bacillus cereusClostridium sp. like botulinum, Clostridium frigidicarnis, and Clostridium algidicarnis. One Lactobacillus curvatus strain and one Lactococcus lactis strain were ultimately selected for their widest inhibitory spectrum and their potential production of bacteriocin. A Lactobacillus plantarum strain was included as control. Their resistance to HPP and ability to regrow during chilled storage was then assessed in model ham liquid medium. Treatments of pressure intensities of 400, 500, and 600 MPa, and durations of 1, 3, 6, and 10 min were applied. After treatment, cultures were incubated at 8 °C during 30 days. Inactivation curves were then fitted by using a reparameterized Weibull model whereas growth curves were modelled with a logistic model. Although the two Lactobacillus strains were more resistant than L. lactis to HPP, the latter was the only strain able to regrow following HPP. The absence of biogenic amine production of this strain after growth on diced cube cooked ham was also shown. In conclusion this L. lactis strain could be selected as representing the best candidate for a promising preservative treatment combining biopreservation and HPP to control spore-forming bacteria in cooked ham.

 
2018

Classification of trace elements in tissues from organic and conventional French pig production

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Julien Parinet et al., Meat Science, 2018, volume 141, juillet, p. 28-35

This study assesses the impact of the farming system on the levels of copper, zinc, arseniccadmium, lead and mercury in pig tissues from three types of production (Organic (n = 28), Label Rouge (n = 12) and Conventional (n = 30)) randomly sampled in different slaughterhouses. All the concentrations were below regulatory limits. In muscles, Cu, Zn and As were measured at slightly higher levels in organic samples but no differences between organic and Label Rouge was observed. Livers from conventional and Label Rouge pig farms exhibited higher Zn and Cd contents than the organic ones, probably due to different practice in zinc or phytase supplementation of fattening diets. Principal component analysis indicated a correlation between Cu and As concentrations in liver and carcass weight, and between Zn and Cd liver levels and lean meat percentage. The linear discriminant analysis succeeded in predicting the farming process on the basis of the lean meat percentage and the liver Cd level.

2018

Qualité de la viande de porc

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Jacques Mourot (INRA) et al., In: Valérie Berthelot, dir., Valérie Berthelot, Alimentation des animaux et qualité de leurs produits (p. 172-190). Paris, Lavoisier Tec & Doc. 442 pages

Les produits animaux occupent une place importante dans notre régime alimentaire en apportant des nutriments indispensables à notre équilibre physiologique. Au-delà de cette qualité nutritionnelle, ils doivent aussi répondre à des objectifs de qualité sanitaire, sensorielle et de service ainsi qu’aux attentes des consommateurs. L’objectif de cet ouvrage est de faire la synthèse des connaissances scientifiques sur les relations entre ces différentes qualités et l’alimentation des animaux. La formulation des régimes alimentaires a évolué pour assurer une qualité optimale des produits issus des élevages tout en satisfaisant au mieux les besoins des animaux. Après un chapitre introductif sur la notion de qualité et son sens actuel, Alimentation des animaux et qualité de leurs produits aborde en 13 chapitres les thématiques suivantes :

• Alimentation animale, formulation des régimes et réglementation

• Déterminants alimentaires et non alimentaires en élevage de la qualité des produits

• Qualité des produits animaux et attente des consommateurs : intégration du volet alimentation et mise en œuvre par les acteurs des filières

2018

Réduire les impacts environnementaux des produits animaux avec des éco-aliments

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Sandrine Espagnol et al., Innovations Agronomiques (FRA), 2018, volume 63, janvier, p. 231-242

L’alimentation du bétail est au coeur des problématiques environnementales des élevages. Pour les porcs et les volailles, elle explique entre 50 et 98% de leurs impacts environnementaux au portail de la ferme. Pour les bovins, leurs concentrés représentent 17% des 12.3 millions de tonnes d’aliments composés produits dans le Grand Ouest. Ainsi, cette étude évalue les bénéfices environnementaux associés à la production d’éco-aliments, c’est-à-dire d’aliments avec des impacts environnementaux réduits. Une base de données a été créée sur les impacts environnementaux de 150 intrants alimentaires du bétail calculés par Analyse de Cycle de Vie. Ces données ont été mobilisées dans une fonction multiobjectif pour formuler les aliments en prenant en compte des critères environnementaux en plus du critère prix habituel. Des bénéfices environnementaux et des coûts liés à ces éco-aliments ont été obtenus pour différentes stratégies alimentaires de porc à l’engrais, de poulet de chair, de vaches laitières et de jeunes bovins, à la tonne d’aliment et au kilogramme de produit. Une mise en oeuvre à l’échelle du Grand Ouest considérant tous les aliments composés fabriqués et toutes les filières animales montre, à la tonne d’aliment moyen, une réduction possible du changement climatique de 7% pour un surcoût de 2%.

ENG

Reducing feeding environmental impacts with eco-feeds

Feeding is central for the environmental aspects of animal production. For pig and poultry, feeds explain between 50 and 98% of the environmental impacts of animal product at farm gate. For cattle, the concentrated feeds account for 17% of the 12.3 million tons of compound feeds produced in the West of France. This study looked at the environmental benefit of eco-feeds which are feeds with lower environmental impacts. A database was built concerning the environmental impacts of 150 feedstuffs calculated by Life Cycle Assessment. Those data were used in a multiobjective function in order to formulate feed with environmental criteria and the usual cost criteria. The environmental benefits and the costs due to eco-feed were obtained for different feeding strategies of fattening pigs, broilers, dairy cows and young cattle at the scale of the ton of feed and the kilogram of animal product. An implementation at territory scale was also performed in the West of France by considering all the feeds and the animal productions: the results showed for instance a possible reduction of 7% for the impact climate change of the average ton of compound feed for an extra cost of 2%.

2018

Développement de nouveaux outils haut débit pour l’évaluation précoce de la qualité de la viande de porc (QualiPorc)

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Sandrine Schwob et al., Innovations Agronomiques (FRA), 2018, volume 63, janvier, p. 407-419

Les perspectives en matière d'amélioration génétique de la qualité de viande (QV) reposent sur la mise au point de nouveaux outils haut débit, de prédiction précoce, peu coûteux et non invasifs. Pour cela, de nouvelles méthodes de mesure de QV, s’appuyant sur des technologies émergentes, ont été développées et testées en routine. L’imagerie par résonance magnétique (IRM) permet de quantifier les teneurs en lipides intramusculaires (LIM) et caractériser le persillage dans le muscle Longissimus. La méthode d’analyse d’images a été automatisée pour améliorer les cadences de mesures (400 échantillons scannés par jour) et assurer la traçabilité des données. L’évolution du taux de LIM le long du muscle Longissimus analysée par IRM montre que l’échantillon prélevé au niveau de la 13ème côte est représentatif du taux de LIM moyen de la longe (R²=0.88). La spectroscopie visible et proche infrarouge (NIRS) permet, quant à elle, de prédire les rendements technologiques et les défauts de tranchage. Enfin, les données d’expression génique quantifiées dans le muscle Longissimus ont été exploitées afin d’identifier des biomarqueurs discriminant 3 classes de qualité technologique et sensorielle: à défaut, correct ou extra. Le meilleur modèle pour prédire l’appartenance d’un échantillon à une classe de qualité inclut 12 gènes.

ENG

Development of high throughput methods to predict pork quality at industrial scale

This project aimed at providing new early and non-invasive predictors of pork quality usable in slaughter houses, to orientate use of carcasses and cuts and optimize their economic value. For this purpose, the project included development, testing and validation of various methods under industrial conditions. Magnetic Resonance Imaging (MRI) technology was used to estimate the Longissimus muscle intramuscular fat (IMF) content and marbling. Image analysis method was automated to improve measurement rate (400 samples scanned per day) and ensure data traceability. MRI was also used to study the representativeness of IMF content determined at the 13th rib to assess average IMF of the whole Longissimus muscle. Results showed high repeatability and good predictive ability of Longissimus average IMF content with determination at the 13th rib level (R²=0.88). Near Infrared Spectroscopy (NIRS) was used to estimate cooking and slicing yields and structural defects. NIRS technology could predict slicing losses caused by paste-like and cohesion defects on processed loin slices. Finally, gene expressions quantified on Longissimus muscle were used to discriminate 3 pork quality classes: low, acceptable and extra technological and sensory quality levels. The best model to predict meat quality level of pork loins included expression levels of 12 genes.

2018

Using 1K SNP panel for genomic selection in 3 French pig breeds: Accuracy of Imputation and estimation of genomic breeding values using 1K SNP panel, designed for several breeds in French pig populations

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Céline Carillier-Jacquin (Université de Toulouse, INRA, INPTet ENVT)  et al., Proceedings of the World Congress on Genetics Applied to Livestock Production, vol. Electronic Poster Session - Species - Porcine 1, Auckland, Nouvelle-Zélande, 11–16 février 2018, p. 294-298

The current cost of medium density SNP chips is a limit to the development of genomic selection in pig populations (Badke et al., 2014; Wellmann et al., 2013). To reduce the cost of genotyping, a low density (LD) SNP chip was designed in 2016 and has been used in routine.
This LD panel of around 1100 SNP was optimized for imputation accuracy in the French Landrace (Land) pig population using equally spaced SNP with minor allele frequency (MAF) larger than 0.2. In the present study, we proposed to adapt the panel to two other major French pig breeds i.e. Large White (LW) and Pietrain (PI) lines. Imputation accuracy as well as the impact on genomic estimated breeding value (GEBV) were estimated in the three breeds using this new SNP chip design.

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2018

Immunome differences between porcine ileal and jejunal Peyer’s patches revealed by global transcriptome sequencing of gut-associated lymphoid tissues

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T. Maroilley et al., Scientific Reports, 2018, volume 8, n° 1, 13 juin, 12 pages

The epithelium of the intestinal mucosa and the gut-associated lymphoid tissues (GALT) constitute an essential physical and immunological barrier against pathogens. In order to study the specificities of the GALT transcriptome in pigs, we compared the transcriptome profiles of jejunal and ileal Peyer’s patches (PPs), mesenteric lymph nodes (MLNs) and peripheral blood (PB) of four male piglets by RNA-Seq. We identified 1,103 differentially expressed (DE) genes between ileal PPs (IPPs) and jejunal PPs (JPPs), and six times more DE genes between PPs and MLNs. The master regulator genes FOXP3GATA3STAT4TBX21 and RORC were less expressed in IPPs compared to JPPs, whereas the transcription factor BCL6 was found more expressed in IPPs. In comparison between IPPs and JPPs, our analyses revealed predominant differential expression related to the differentiation of T cells into Th1, Th2, Th17 and iTreg in JPPs. Our results were consistent with previous reports regarding a higher T/B cells ratio in JPPs compared to IPPs. We found antisense transcription for respectively 24%, 22% and 14% of the transcripts detected in MLNs, PPs and PB, and significant positive correlations between PB and GALT transcriptomes. Allele-specific expression analyses revealed both shared and tissue-specific cis-genetic control of gene expression.

2018

Le projet ACCEPT : pourquoi, pour qui, quoi, qui ?

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Visuels d'intervention de Christine Roguet, Journée de réflexion collective autour des conclusions du projet ACCEPT « Controverse sur l’élevage : comprendre et agir », le 5 avril 2018, Paris, 5 pages

PDF icon Christine Roguet, Journée de réflexion collective ACCEPT « Controverse sur l’élevage : comprendre et agir » 5 avril 2018
2018

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