La base documentaire de l'IFIP

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.

Christine Roguet, Baromètre Porc (FRA), 2019, n° 498, juin, synthèse du mois, p. 8

En 2018, la production porcine est réalisée en France par quelques 10 000 sites d’élevage, d’une taille moyenne de 3 367 porcs sortis. La moitié d’entre eux réalisent uniquement l’engraissement, alimentés par 10 millions de porcelets provenant à parts presque égales de naisseurs et de naisseurs-engraisseurs. Quatre régions produisent plus de 80% des porcs charcutiers.

Isabelle Corrégé, Réussir Porc / Tech Porc (FRA), 2019, n° 269, juin, p. 9

En application de l'arrêté ministériel du 16 octobre 2018 sur les mesures de biosécurité en élevage...

Solène Lagadec et al., Réussir Porc / Tech Porc (FRA), 2019, n° 269, juin, p. 38-39

L'air des salles d'élevage peut contenir plus de 250 000 particules fines par mètre cube d'air. Prévention et protection sont de rigueur pour préserver la santé du travailleur.

Alexandre Poissonnet et al., 11th European Symposium of Porcine Management (ESPHM), 22-23-24 mai 2019, Utrecht, Pays-Bas, poster

The evolution of expenses for veterinary medication in the French national technical and economic database (GTE) is used to analyze antibiotics usage. The evolution of preventive medication especially vaccine usage is surveyed. The large panel of data from the GTE database permit to analyse the geographical area infl uence on medication costs.

Isabelle Corrégé et Anne Hémonic, 11th European Symposium of Porcine Management (ESPHM), 22-23-24 mai 2019, Utrecht, Pays-Bas, poster

Biosecurity is an essential step for any sustainable approach to reducing the use of antibiotics. In the framework of the French Ecoantibio plan, IFIP has created a tool which objective is to evaluate biosecurity level of a farm and help pig farmers to change their practices.

Christelle Fablet (Anses) et al., 11th European Symposium of Porcine Management (ESPHM), 22-24 mai 2019, Utrecht, Pays-Bas

PRRS MLV vaccines are used to prevent reproductive disorders due to PRRSV in sows. Vaccine efficacy was proven only in sows vaccinated once or twice. In vaccinated herds, sows receive multiple vaccine boosters. To date, no data are available on the maintenance of PRRS immunity during these multiple revaccinations.

Patricia Renson (Ifip et Anses) et al., 11th European Symposium of Porcine Management (ESPHM), 22-24 mai 2019, Utrecht, Pays-Bas

Swine influenza A virus (swIAV) is a major respiratory pathogen frequently circulating after weaning, a period commonly used to implement PRRS MLV vaccination in piglets. SwIAV infection was previously shown to induce a strong IFN? response. A recent study also showed that IFN? could abrogate the replication of a PRRSV-2 MLV and the inherent immune response.

M Revilla et al., Animal, 2019, volume 16, mai, 11 pages

Weaning is a critical transition phase in swine production in which piglets must cope with different stressors that may affect their health. During this period, the prophylactic use of antibiotics is still frequent to limit piglet morbidity, which raises both economic and public health concerns such as the appearance of antimicrobial-resistant microbes. With the interest of developing tools for assisting health and management decisions around weaning, it is key to provide robustness indexes that inform on the animals’ capacity to endure the challenges associated with weaning. This work aimed at developing a modelling approach for facilitating the quantification of piglet resilience to weaning. A total of 325 Large White pigs weaned at 28 days of age were monitored and further housed and fed conventionally during the post-weaning period without antibiotic administration. Body weight and diarrhoea scores were recorded before and after weaning, and blood was sampled at weaning and 1 week later for collecting haematological data. A dynamic model was constructed based on the Gompertz–Makeham law to describe live weight trajectories during the first 75 days after weaning, following the rationale that the animal response is partitioned in two time windows (a perturbation and a recovery window). Model calibration was performed for each animal. Our results show that the transition time between the two time windows, as well as the weight trajectories are characteristic for each individual. The model captured the weight dynamics of animals at different degrees of perturbation, with an average coefficient of determination of 0.99, and a concordance correlation coefficient of 0.99. The utility of the model is that it provides biologically meaningful parameters that inform on the amplitude and length of perturbation, and the rate of animal recovery. Our rationale is that the dynamics of weight inform on the capability of the animal to cope with the weaning disturbance. Indeed, there were significant correlations between model parameters and individual diarrhoea scores and haematological traits. Overall, the parameters of our model can be useful for constructing weaning robustness indexes by using exclusively the growth curves. We foresee that this modelling approach will provide a step forward in the quantitative characterisation of robustness.

https://www.cambridge.org/core/services/aop-cambridge-core/content/view/18FBD3614BA779E09D061744323CF5DD/S1751731119000843a.pdf/towards_the_quantitative_characterisation_of_piglets_robustness_to_weaning_a_modelling_approach.pdf