Contact voltages < 0.5 V in feeders and drinkers influence the behaviour and oxidative status of piglets

Contact voltages < 0.5 V in feeders and drinkers influence the behaviour and oxidative status of piglets

Scientific publication

animal health

Contact voltages < 0.5 V in feeders and drinkers influence the behaviour and oxidative status of piglets

Stray currents of low voltage in drinkers and feeders in post-weaning units affect piglets’ behaviour and oxidative status, suggesting that stray currents might induce a physiological stress for piglets.

The aim of this study was to evaluate the impact of stray voltages < 0.5V in pig housing on the behaviour of piglets and health and welfare biomarkers after weaning. For this study, two consecutive batches of 860 pigs weaned at 28 days were divided between two rooms of 12 pens, each with 33-36 piglets. In each pen, the difference in electrical potential between the floor and each drinker and feeder was measured every two weeks. Piglets were divided into four groups as a function of the voltage in drinkers and feeders. Behaviour was observed by scan sampling twice a week for seven weeks. It showed that piglets exposed to high-voltage drinkers (> 125 mV) spent less time standing inactive (P = 0.05) and more time orally manipulating pen mates (P = 0.003). Piglets exposed to high-voltage feeders (> 50 mV) spent less time sleeping (P = 0.02). They also spent more time nosing and being aggressive to pen mates but these effects were influenced by the voltages in drinkers (P = 0.03 and 0.02, respectively). Hydroperoxides concentration tended to be higher in piglets exposed to high voltages in both drinkers and feeders (P = 0.06). Our results suggest that the presence of stray currents in housing might influence the behaviour and oxidative status of piglets in post-weaning facilities

Vaccination and diagnosis of enzootic pneumonia

Vaccination and diagnosis of enzootic pneumonia

Scientific publication

Vaccination and diagnosis of enzootic pneumonia

This study was carried out for an external R&D service for a pharmaceutical laboratory. The objective was twofold. First, for our client, this study made it possible to compare the effectiveness of two of these vaccines for the prevention of enzootic pneumonia in breeding based on clinical criteria, technical performance (ADG, mortality) and injury criteria. at the slaughterhouse. This study also made it possible to study the dynamics of Mycoplasma hyopneumoniae in breeding by comparing the number of positive pigs (by PCR and by serological analysis) and the bacterial load between vaccinated pigs with unvaccinated pigs raised together.

vaccins pour la prévention de la pneumonie enzootique
The impact of parity on haematological parameters and the consequences on reproductive performance

The impact of parity on haematological parameters and the consequences on reproductive performance

Scientific publication

Haematological reference intervals of sows at end gestation in ten French herds, the impact of parity on haematological parameters and the consequences on reproductive performance

Changes in haematological values occur during the reproductive cycle. In veterinary swine practice, haematological reference intervals for this period are scarce. Over past decades, there has been a remarkable increase in reproductive prolificacy, possibly making previously established haematological reference intervals for sows outdated.

The aim of this study was to provide updated haematological reference intervals for sows at endgestation, to study the influence of parity on those haematological parameters and to evaluate the impact of haemoglobin levels on production performance.

conséquences des paramètres sanguins sur les mise bas

Microbiological quality of liquid feed consumed by sows VS neonatal diarrhoea (2/2)

Microbiological quality of liquid feed consumed by sows VS neonatal diarrhoea (2/2)

Scientific publication

Microbiological quality of liquid feed consumed by sows VS neonatal diarrhoea (2/2)

This study is part of our internal R&D project aimed at better understanding neonatal diarrhea, to allow better management of this problem with serious consequences both for the health of piglets and for the technical and economic performance of farms. The objective of this case-control study was to assess whether the microbiological quality of the unfermented soup distributed to sows was associated with the presence of recurrent neonatal diarrhea in the herd. Our study suggests that the higher the counts of total coliforms, enterococci and yeasts in soup fed to sows, the greater the likelihood of observing neonatal diarrhea in the flock. In addition, if the two microbiological criteria, total coliforms and yeasts are simultaneously degraded, the probability of observing neonatal diarrhea is maximum. This study therefore obliges us to systematically integrate an analysis of the soups distributed to sows in our diagnosis of neonatal diarrhea.

 

publications scientifique soupe non-fermentée distribuée aux truies
Infection by Mycoplasma suis is probably widespread and enzootic in France

Infection by Mycoplasma suis is probably widespread and enzootic in France

Scientific publication

Infection by Mycoplasma suis is probably widespread and enzootic in France

Mycoplasma suis was detected in all 10 farms and in all parities, suggesting that M. suis infection is probably widespread and enzootic. Nevertheless, in our study, based on recorded clinical signs and production, haematological and biochemical parameters, we could not demonstrate a significant impact of M. suis infection on health status and production performances of sow herds, except an increase in stillbirth rate in gilts.

Brissonnier et al., 2020- publication scientifique filière porcine