Abstracts - Pig health

Here we report the discovery that deletion of a previously uncharacterized gene, I177L, from the highly virulent ASFV-G produces complete virus attenuation in swine.

Circovirus 4 was identified in several pigs with severe clinical disease in Hunan Province, China.

Essential oils may act as antimicrobial agents in seminal doses serving as an alternative to traditional antimicrobials in the face of increasing antimicrobial resistance.

A commonly employed molecular typing method for M. hyopneumoniae is Multiple‐Locus Variable number tandem repeat Analysis (MLVA).

Sampling technique validated to monitor PRRSV-2 using serosanguinous exudate or processing fluids (PFs) from tissues obtained during tail docking and castration provides a general framework to interpret PRRSV-2 surveillance program results more accurately.

The aim of this work was to compare the profile and time-course of humoral and cell-mediated immunity in stable and unstable herds, respectively.

In this pilot study, we sought to assess and characterize the mycobiome in the feces of swine from birth through the critical weaning transition.

According to the results of this study carried out in 60 German farrow-to-finish herds , the active improvement of biosecurity measures could be a promising alternative to reduce antimicrobial usage on herd level.

Processing fluids (PF) constitute a useful sample to detect PRRSV infections at processing. Current practice to bleed 30 pigs could be underestimating PRRSV prevalence in the herd.

The objective of this pilot study was to determine if a fluorescent powder (Glo Germ) could be used to study the transfer of contamination from livestock trailers to the center alleyway and pens in the barn during marketing events.

We found decreasing proportions of S. enterica serovar Typhimurium, Derby and Heidelberg and increasing proportions of Infantis and serovar Johannesburg.

These results could open the door to new perspectives on the utility of early life antimicrobial administration to healthy neonates in swine management systems.

In this study, shotgun metagenomics was employed to monitor the effect of oxytetracycline, administered at a therapeutic dose, on the dynamics of the microbiota and resistome in the feces of weaned pigs.

Sow vaccination or infection status that results in high levels of IAV strain-specific maternally-derived antibodies may help to reduce IAV circulation in both suckling and nursery pigs.

The objective was to determine if the addition of a bench entry system in a commercial swine facility with a shower lowers the risk of personnel introducing environmental contamination.

In a PRRSV-endemic setting involving bacterial co-infections, an ABF production strategy may leave pigs at considerable risk of exposure to severe clinical disease.

Dietary supplementation of C. butyricum might be a suitable alternative to antibiotics and ZnO for weanling pigs.

This is, to our knowledge, the first report of a promising vaccine against ASF virus in wild boar by oral administration.

Group and environmental sampling strategies should be considered in influenza surveillance programs in particular if the goal is just to detect infection.

The findings of this study emphasize the importance of considering transmission of FMD during the incubation phase in modeling and response planning.

Seropositive wild boar in certain areas suggests that some animals may be surviving for some time or could even be recovering from the disease. This could be due to the presence of related viruses of reduced virulence.

Although greater concentrations of ASF virus were required to cause infection through feed, the high frequency of exposure may make contaminated feed a more significant risk factor.

Autogenous vaccination reduces antimicrobial usage in a herd facing severe exudative epidermitis outbreaks in weaned pigs.

Fallen wild boar are the main target for passive surveillance. However, encouraging reporting by hunters and sampling of these animals is difficult.