Related Experiment Videos
Salmonella (sero)types and their resistance patterns in pig faecal and post-mortem samples
P J van der Wolf1, N H Peperkamp
1Animal Health Service, Pig Health Department, Deventer, The Netherlands. p.vd.wolf@gdvdieren.nl
The Veterinary Quarterly
|January 5, 2002
Summary
Porcine Salmonella Typhimurium, particularly the multiresistant DT104 strain, was frequently detected in pig samples. Antimicrobial resistance was common, necessitating tailored treatment and prevention strategies for swine bacterial diarrhea.
Area of Science:
- Veterinary Microbiology
- Animal Health
- Bacteriology
Background:
- Salmonella infections pose a significant threat to swine health and production.
- Understanding serotype prevalence and antimicrobial resistance patterns is crucial for effective disease management in pigs.
Purpose of the Study:
- To survey porcine Salmonella isolates from fecal and post-mortem samples over a four-year period.
- To determine the prevalence of Salmonella serotypes and phage types, focusing on Salmonella Typhimurium and its variants.
- To assess antimicrobial susceptibility patterns among isolated Salmonella strains.
Main Methods:
- Direct inoculation of samples onto selective agar plates (BGA(NO) and sheep blood agar).
- Isolation and identification of Salmonella species.
- Antimicrobial susceptibility testing using the agar diffusion method.
Main Results:
- Salmonella was isolated from 4.2% of porcine submissions, with 1305 isolates identified from 1008 herds.
- Salmonella Typhimurium was the predominant serotype (88%), with Salmonella Typhimurium DT104 being the most common phage type (17.2%).
- Antimicrobial resistance was observed in 47.3% of isolates, predominantly in multiresistant Salmonella Typhimurium DT104 strains.
Conclusions:
- Salmonella Typhimurium, especially the multiresistant DT104 phage type, is a major concern in swine populations.
- High rates of antimicrobial resistance highlight the need for judicious antibiotic use in pigs.
- The frequent co-isolation of other pathogens indicates the complexity of porcine diarrhea, requiring comprehensive diagnostic and therapeutic approaches.