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Douchage en porcherie d'abattoir : de nombreux avantages sur toute la ligne

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Le douchage des porcs en abattoir en été améliore le bien-être du porc, la propreté des porcs ainsi que la qualité de l’anesthésie : les conditions de travail des porchers d’abattoir sont également améliorées.
PDF icon Douchage en porcherie d'abattoir : de nombreux avantages sur toute la ligne
2001

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

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

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
2018

Ecology of Salmonella and antimicrobial resistance in a pig slaughterbouse

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Arnaud Bridier (Anses) et al., 13e SafePork, 26-29 août 2019, Berlin, Allemagne, poster

Salmonella: a public health issue
• 1st pathogen in terms of deaths related to contaminated food in France
• > 90 000 salmonellosis per year in Europe
• Multi resistance to antibiotics in the food chain
• Role of cleaning and disinfection (C&D) procedures in the selection of antibiotics resistant bacteria ?

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2019

Ecology of Salmonella and antimicrobial resistance in a pig slaughterhouse

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Arnaud Bridier et al., Food Micro, 3-6 septembre 2018, Berlin, Allemagne et I3S, 24-26 septembre 2018, Saint-Malo, France

Salmonella is a bacterial pathogen responsible for a large number of food associated infections. In order to guarantee food safety, a better understanding of Salmonella ecology and adaptation strategies on the food production chain constitutes a prerequisite. In a One Health perspective, data on Salmonella antibiotic resistance in food environments are also crucial to decipher transmission routes of resistant foodborne pathogens as well as resistance genetic determinants involved, and the role of process and selection pressures underwent in food industries (as cleaning and disinfection) in bacterial adaptation and antimicrobial resistance emergence.
Using a pig slaughterhouse as a model food environment, occurrence of Salmonella was investigated at six different areas along the slaughter chain and through 4 sampling campaign, each time before and after cleaning and disinfection procedures (a total of 48 surface samples). Characterization of isolated Salmonella strains using serotyping and pulsotyping enabled to identify and trace persistent strains in the slaughterhouse. Minimal inhibiting concentrations (MIC) were also determined for various relevant antibiotics and for biocides used in the slaughterhouse. In addition, associated indigenous bacterial communities were characterized using 16S rRNA amplicon sequencing. 
Results revealed the presence of Salmonella at all sampling area. Five serotypes were identified: S.4,5,12:i:- (50%), Rissen (16%), Typhimurium (16%), Infantis (10%) and Derby (8%). Strains were found at different dates and potentially at the same sampling area suggesting they persist in the slaughterhouse despite of the cleaning and disinfection procedures. Approximately 70% of isolated Salmonella strains exhibit resistance to ampicillin and sulfamethoxazole, 80% to tetracycline and 10% to chloramphenicol. There was no evolution of CMI comparing strains before and after cleaning and disinfection procedures concerning both biocides and antibiotics. Bacterial diversity analyses showed that populations in slaughterhouse were highly dominated by &a1;-proteobacteria and especially by the Moraxellaceae family (genus Psychrobacter, Moraxella, Enhydrobacter and Acinetobacter) at the different sampling areas. Population compositions were overall stable in time at a given sampling area suggesting that the surface populations are resident populations within the slaughterhouse, rather than populations introduced each week by the new swine bands. Cleaning and disinfection procedures tend to reduce bacterial diversity by eliminating the minority species but did not greatly impact the composition of bacterial communities with regards to the dominant species.
Together, such data participate to the construction of a comprehensive view of Salmonella ecology in food environments integrating associated resident microbial flora and the distribution of antimicrobial resistance in relation to processing conditions.

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2018

Effect of feed restriction on the performance and behaviour of pigs immunologically castrated with Improvac®

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For centuries, entire male pigs have been castrated to reduce the risk of boar taint. However, physical castration of pig is increasingly being questioned with regard to animal welfare considerations. Immunization against gonadotrophin releasing hormone (GnRH) provides an alternative to physical castration. Using the currently available commercial product (Improvac®; Pfizer Animal Health), a two-dose regimen of a GnRH vaccine is administered.
2012

Effect of K-diformate in fattening diets on Salmonella carriage in high prevalence pig herds

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2010

Effect of mixing entire males with females and slaughter strategy on behavior, growth and boar taint

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Valérie Courboulay et al., 64th EAAP, 26-30 août 2013, Nantes, France, visuels d'intervention

Management may influence behavior and growth performance of entire male, as well as boar taint risk. Two batches of 12 groups of 10 pigs each were used in a 3x2 factorial design based on group composition (10 males-M. 10 females-F. 5 males and 5 females-MF) and slaughter strategy (1 (10) or 2 (2D) departures per pen). In the 2D treatment, the four heaviest pigs (2 males and 2 females for MF treatment) were slaughtered 2 weeks before the others (22.5 weeks old). Pigs were 9 weeks old at the beginning of the experiment, Posture and behavior were recorded by scan sampling every 10 minutes during 2.5 h, every week from the fifth week before the first departure to the slaughterhouse (01). Gender of the recipient and the performer of social interactions were considered. Lesions and lameness were scored individually 1 week before D1, 1 and 2 weeks later. Data were analyzed with a mixed model or with the Kruskal Wallis test. Analyses were performed for both periods, before and after D1. Social and sexual behavior did not differ significantly between M and MF pens and were significantly more frequent than in F pens. In MF pens, more aggressions were observed between males than in any other combination (P<0.05). Siaughter strategy had no impact on social behavior after D1, but sexual behavior was significantly less performed in 2D pens, whatever the group composition. Consequently, lesion score was lower in 20 than in 10 pens, with a significant difference only in MF pens. Both factors affected boar taint components. Androstenone level in backfat was lower in males mixed with females than in single sex pens (P<0.05). Skatole level in backfat was higher for the 20 males at the second departure than for 10 males (P<0.01). Our results indicate that mixing pigs reduces boar taint and improves animal welfare in both slaughter strategies.

PDF icon Valérie Courboulay et al., 64th EAAP, 26-30 août 2013, Nantes, France, visuels d'intervention
2013

Effects of halothane genotype and pre-slaughter treatment on pig meat quality. Part 2. Physico-chemical traits of cured-cooked ham and sensory traits of cured-cooked and dry-cured hams

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Meat science (GBR), 2002, V 62, n° 4, décembre, p.439-446, 8 p., en anglais, par Fernandez X et al.

Effets du génotype halothane et de traitement pré-abattage sur la qualité de la viande de porc. Partie 2 : caractéristiques physico-chimiques du jambon cuit et caractéristiques sensorielles des jambons cuit et sec

ABSTRACT

Forty-eight castrated F2 offspring of Piétrain and Large White pigs were allocated to a 3×2 factorial design in order to study the interactive effect of halothane genotype (NN, Nn and nn) and pre-slaughter treatment (referred to as ’Experimental’ (EXP) and ’Commercial-like’ (COL) conditions; the latter involving short transportation, mixing unfamiliar pigs and slaughtering shortly after transport) on the qualities of cured-cooked and dry-cured hams. At 24 h post mortem, the hams were collected and assigned to cured-cooked (right ham) and dry-cured (left ham) ham processing. A sample of M. semimembranosus (SM) was collected before cooked ham processing, was used for chemical composition analysis, cured and then cooked at various temperatures. Cooking losses and compression tests were carried out after cooking on these SM samples. The water and collagen content of SM muscle was significantly higher in nn pigs compared with the two other genotypes. At all cooking temperatures (60, 65 and 70 °C), SM muscles from nn pigs showed higher cooking losses and instrumentally assessed toughness than the other genotypes, the heterozygous pigs being intermediate. The technological yield of cured-cooked ham processing was lower in nn, compared with NN and Nn animals. Cooked hams from nn pigs were drier, tougher, stringier and less smooth than NN and Nn pigs. The heterozygous pigs were similar to normal pigs for all texture characteristics with the exception of toughness for which they got a significantly higher score than NN pigs. The pigs slaughtered under the COL conditions had a better slice cohesiveness and a significantly lower dryness, than pigs slaughtered under the EXP conditions. The effect of HAL genotype on slice cohesiveness was significant only when pigs were slaughtered under the EXP conditions. Dry-cured hams from nn pigs showed significantly more visual defects, but were less tough, smoother and more fondant (softer) than NN and Nn pigs. The dry-cured hams from pigs slaughtered under the COL conditions had a better cohesiveness between muscles and a more intense yellow colour of fat than those from pigs slaughtered under the EXP conditions. COL pigs were also judged significantly less tough, smoother and more fondant than EXP ones. Overall, the effects of pre-slaughter treatment were small compared with those of the HAL genotype. The effects of HAL genotype on the sensory traits of cured-cooked ham were similar to those reported for fresh meat. However, the good textural characteristics of dry-cured ham processed from HAL positive pigs are somewhat surprising and need to be confirmed.

2002

Effet de l'acidification de l'aliment d'engraissement sur la séroprévalence dans des élevages à prévalence en salmonelles élevée

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Poster. La maîtrise des salmonelles dans la filière porcine passe par la mise en place d’actions préventives tout au long de la chaîne alimentaire. En particulier, la réduction du portage par les porcs est un des moyens permettant de diminuer l’incidence des salmonelles à l’abattoir. La prévalence en salmonelles varie selon les élevages et plusieurs facteurs associés à une forte prévalence, principalement liés à la biosécurité et à la conduite d’élevage, sont identifiés.
PDF icon Effet de l'acidification de l'aliment d'engraissement sur la séroprévalence dans des élevages à prévalence en salmonelles élevée
2010

Efficiency of sampling methods to monitor the bacterial contamination of pork carcasses before and after chilling

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The aim of the study was to compare the efficiency of destructive (excision) and non-destructive (swabbing and sponging) sampling methods to enumerate aerobic mesophilic microorganisms, Enterobacteriaceae and to detect Salmonella on the surface of pork carcasses.

In three slaughterhouses, a total of 720 half-carcasses were sampled before and after chilling. On each half-carcass, four sites were sampled by both destructive and non-destructive techniques, for a respective total surface of 25 and 400 cm2.
PDF icon Efficiency of sampling methods to monitor the bacterial contamination of pork carcasses before and after chilling
2009

Efficiency of sampling methods to monitor the bacterial contamination of pork carcasses before and after chilling

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PDF icon Efficiency of sampling methods to monitor the bacterial contamination of pork carcasses before and after chilling
2009
Embarquement des porcs - Consignes respectées... vous avez tout à gagner !

Embarquement des porcs - Consignes respectées... vous avez tout à gagner !

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Les enjeux du chargement des porcs. La préparation des porcs dans un local d’attente. Un quai d’embarquement fonctionnel.

Édition 1997 - Ifip, MSA - 6 pages 21 X 29.7

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1997

Enquête sur les niveaux et les évolutions des paramètres d'ambiance en cours de transport

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Cette étude dresse un état des lieux, en période estivale, des niveaux et évolutions des paramètres d’ambiance dans les conditions

de ramassage industrielles des porcs en France. Elle s’imposait compte tenu des évolutions de la législation européenne et des implications techniques et économiques. Cette étude confirme l’importance de la préparation des porcs sur un local de stockage.

La mise en place de systèmes de ventilation forcée mériterait d’être étudiée lors des chargements ou d’arrêts prolongés.
PDF icon Enquête sur les niveaux et les évolutions des paramètres d'ambiance en cours de transport
1998

Epidemiologie de Listeria monocytogenes en abattoirs et ateliers de découpe de porc. Détermination de la traçabilité au moyen d'outils de typage moléculaire (RAPD, PFGE et PCR-REA).<br /><br /><br /><br />Listeria monocytogenes in pork slaughtering and cutting plants use of RAPD, PFGE and PCR-REA for tracing and molecular epidemiology.

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In order to determine the origin of pork cuts contamination by Listeria monocytogenes, 287 isolates, collected from five French pork slaughtering and cutting plants, from live pigs to pork cuts, were characterised using three molecular typing methods: random amplification of polymorphic DNA (RAPD) carried out with five different primers, genomic macrorestriction using ApaI with pulsed-field gel electrophoresis (PFGE) and a PCR–restriction enzyme analysis (PCR–REA) based on the polymorphism existing within the inlA and inlB genes.
1999

Estimation by vision of pork cuts composition for sex and halothane genotype subpopulations

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Gérard Dumas et Mathieu Monziols, 63e International Congress of Meat Science and Technology, Cork, Irlande, 13-18 août 2017, poster

The meat industry is interested in the prediction of the cut yields in order to drive the cutting as effi ciently as possible. These yields can be predicted
with the variables used in the compulsory task of carcass weighing and grading. Nevertheless, the factors having an effect on carcass grading could
have a different effect on the cut grading, specifi c to each cut. This work aims to quantify the systematic deviations for sex and halothane genotype
subpopulations in the estimation of pork cuts composition by the automatic vision system called CSB Image-Meater® .

PDF icon Gérard Dumas et Mathieu Monziols, 63e ICOMST, Cork, Irlande, 13-18 août 2017, pos
2017

Estimation by vision of pork cuts composition for sex and halothane genotype subpopulations

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Gérard Daumas et Mathieu Monziols, 63e International Congress of Meat Science and Technology, Cork, Irlande, 13-18 août 2017, p. 52-53

This work aims to quantify the systematic deviations for sex and halothane genotype subpopulations in the estimation by automatic vision of pork cuts composition. A sample of 208 carcasses, startified according to sex (50% castrated males and 50% females), was measured on line by the classification method CSB Image-Meater® (IM). An ear sample was analysed for halothane gene (Hal). The left sides were cut according to the EU procedure and the four main cuts were CT scanned  in order to determine the lean meat percentage (LMP) in each cut. These LMPs were regressed on six IM potential predictors and the carcass weight. For each equation were calculated the systematic deviations per level of the sex and Hal factors by mean difference between predicted and observed values. The absolute deviation per sexual types was the lowest (0.5%) in ham and the highest (1.4%) in belly. The deviations per Hal genotype ranged from 0.3% in shoulder to 0.8% in belly. In all models females and Hal heterozygotes were underestimated and vice-versa. The deviations per Hal genotype were about the half than per sex. The deviations per sex could be removed by at least a different intercept in the prediction equations.

PDF icon Gérard Daumas et Mathieu Monziols, 63e ICOMST, Cork, Irlande, 13-18 août 2017, p.
2017

Etat des lieux de la mise en oeuvre du plan de lutte contre les salmonelles en France

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La réglementation européenne va imposer à l’aube de 2009 la mise en place d’un plan de contrôle des salmonelles dans la filière porcine, de l’élevage à la transformation. Au niveau français, afin de proposer un plan de contrôle, les travaux et les réflexions sont déjà bien entamés. La sérologie sur jus de viande est la méthode retenue, même si pour l’instant le choix du kit sérologique n’a pas été arrêté. La détermination du plan d’échantillonnage et celle de la méthode de classement des élevages sont en cours d’élaboration.
PDF icon Etat des lieux de la mise en oeuvre du plan de lutte contre les salmonelles en France
2005

Etourdir les porcs en abattoir dans le respect de l'animal et du travailleur

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Tech Porc (FRA), 2017, n° 34, mars-avril, p. 19-21, par Patrick Chevillon

Deux techniques sont à ce jour possibles pour étourdir les porcs avant mise à mort par saignée : l’anesthésie électrique ou l’anesthésie au gaz carbonique CO₂. Cette dernière, plus récente et onéreuse, est préférée dans certains abattoirs à haute cadence, notamment en Bretagne.

PDF icon Tech Porc (FRA), 2017, n° 34, mars-avril, p. 19-21, par Patrick Chevillon
2017

Evaluation de la fréquence de la caudophagie (morsures des queues) d’après des notations en abattoir

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Valérie Courboulay, Bilan 2016, éditions IFIP, mai 2017, p. 101

La caudophagie est un problème de bien-être important en élevage de porc : pour l’animal mordu à cause de la douleur provoquée, à cause du risque d’infection consécutif aux plaies, mais aussi pour l’animal mordeur.

Il n’existe pas de données sur l’importance de ce phénomène en France.

Une façon de le quantifier est d’observer l’état des queues des animaux à l’abattoir ; cela permet d’avoir un instantané de la situation dans de nombreux élevages.

Pour cela, des notations de l’état des queues ont été réalisées dans 2 abattoirs du grand ouest, sur plus de

18 000 carcasses de porcs issus d’élevages conventionnels ou sous label.

Les saisies de carcasses ont également été collectées.

Une enquête par internet a ensuite été réalisée auprès des propriétaires de ces animaux; les 63 questionnaires complétés ont permis à l’IFIP de rechercher les facteurs de risque associés au cannibalisme en créant 2 populations,

« Témoin » et « Cannibalisme », selon le nombre de lésions constatées à l’abattoir et les déclarations des éleveurs.

Parallèlement à ce travail, un bilan a été effectué sur les travaux menés en Europe en vue d’arrêter la coupe de la queue.

PDF icon Valérie Courboulay, Bilan 2016, mai 2017, p. 101, fiche n° 62
2017

Evaluation de la prévalence de caudophagie par la notation des carcasses en abattoir

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Poster présenté par Valérie Courboulay et Adèle Drouet, aux 50es Journées de la Recherche Porcine, le 6 et 7 février 2018, Paris

La caudophagie est considérée comme un problème majeur en élevage de porcs mais sa fréquence d’apparition est mal connue. Cette étude a pour objectifs d’évaluer l’importance de ce phénomène via la notation de l’état des queues sur les carcasses de porcs et de confronter cette notation aux causes de saisie relevées, pour voir si ces dernières peuvent être un indicateur d’alerte sur la présence de cannibalisme en élevage.

PDF icon Poster de Valérie Courboulay et Adèle Drouet, 50es JRP, le 6 et 7 février 2018, Paris
2018

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