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Abstracts - Pig health

Antimicrobial capabilities of tea tree and rosemary essential oils on refrigerated swine seminal doses

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

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Mycoplasma hyopneumoniae variability: Current trends and proposed terminology for genomic classification

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

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Effect of litter aggregation and pooling on detection of PRRSv in piglet processing fluids

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.

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Comparative evaluation of immune responses of swine in PRRS-stable and unstable herds

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.

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The piglet mycobiome during the weaning transition

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

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Association between antimicrobial usage, biosecurity measures as well as farm performance

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.

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Processing fluids and serum samples to characterize PRRSv dynamics in 3 day-old pigs

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.

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Use of a fluorescent powder to study the transfer of contamination from livestock trailers

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.

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Changes in the prevalence of Salmonella serovars associated swine production

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

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Effect of antimicrobial administration at birth on prevalence of antimicrobial resistance genes in piglets

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

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The dynamics of the antibiotic resistome in the feces of weaned pigs following administration of oxytetracycline

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.

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Effect of strain-specific maternally-derived antibodies on influenza A virus infection dynamics in nursery 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.

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Shower-in and shower-in plus bench entry protocols for prevention of contamination in a swine facility

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.

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Performance of pigs raised in antibiotic-free or conventional production systems following challenge with PRRSV

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.

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Supplementation of C. butyricum and B. licheniformis in weanling piglets

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

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First oral vaccination of Eurasian wild boar against ASF virus genotype II

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

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Sampling strategies to conduct influenza surveillance in pigs

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

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Importance of considering transmission of FMD during the incubation phase

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

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Evolution in Europe of ASF genotype II viruses from highly to moderately virulent

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.

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Infectious dose of ASFV when consumed naturally in liquid or feed

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.

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Autogenous vaccination in a herd facing severe exudative epidermitis outbreaks in pigs

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

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Alternative sampling strategies for passive CSF and ASF surveillance in wild boar

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

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PCV-2 genotype update and proposal of a new genotyping methodology

The suggested classification can establish a "common language" for future studies, further efforts should be paid to achieve a more homogeneous and informative representation of the PCV-2 global scenario.

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