Scientific publications

Discover all the scientific publications published in specialized magazines. Pig health, building design, breeding management, we regularly publish scientific articles on the environment of the pig industry

 

Vaccination and diagnosis of enzootic pneumonia

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.

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

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in reproductive prolificacy, possibly making previously established haematological reference intervals for sows outdated.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.

Infection by Mycoplasma suis is probably widespread and enzootic in France

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.

PRRSV : MLV detection at weaning after mass vaccination

PRRSV : MLV detection at weaning after mass vaccination

Processing fluids and blood samples at weaning were collected in four consecutive batches born after a booster sow mass MLV vaccination. We failed to detect PRRSV by qPCR on PF and BS collected in a positive-stable breeding herd after vaccination with a modified live vaccine.

Mycoplasma suis: lower sensitivity of blood smears compared to PCR

Mycoplasma suis: lower sensitivity of blood smears compared to PCR

In our study, the comparison of qPCR results with microscopic investigation of Giemsa-stained blood smears revealed a lower sensitivity of the microscopic method: only 33 out of 102 qPCR positive blood samples were microscopically positive (M. suis visualized). No relationship between mean qPCR loads and microscopic observation was observed.

OF samples from due-to-wean piglets: easy and effective

OF samples from due-to-wean piglets: easy and effective

Pooled OF sampling is representative at litter level if collection is successful (> 2 ml of fluids collected). In order to improve the success rate of collection, pre-exposing the piglets with a rope one day prior to sampling is effective

PRRSV : only one MLV per herd !

PRRSV : only one MLV per herd !

In Europe, modified live vaccines (MLV) are commonly used to control porcine reproductive and respiratory syndrome virus (PRRSV) infection. However, they have been associated with safety issues such as reversion to virulence induced by mutation and/or recombination. On a French pig farm, we identified a field recombinant strain derived from two PRRSV-1 MLV.

Evaluation of 3 serological assays for ileitis diagnosis

Evaluation of 3 serological assays for ileitis diagnosis

This study reported that reliable results may be obtainable through transverse sampling (herd profiling), where several batches of different ages are sampled concurrently. This has advantages in time and labour costs over longitudinal sampling procedures, where animals are repeatedly sampled at different time points.