Salmonella (sero)types and their resistance patterns isolated from pig faecal and post-mortem samples in 2000 - 2003

Abstract

<p>The purpose of this survey was to describe the porcine Salmonella isolates derived from faecal samples and post-mortem material (PMM) during years 2000 - 2003. Salmonella was isolated by direct inoculation on BGANO-plates (faeces, intestinal content) or sheep blood agar (organs). Antimicrobial susceptibility was tested by the agar diffusion method. Salmonella was isolated in 3.2% of all porcine submissions received at the Animal Health Service. A total of 960 salmonellae were isolated from a total of 589 submissions from 488 different herds. S. Typhimurium was the most frequently isolated serotype (N= 808, 92.6% of 873 isolates typed), and Salmonella Typhimurium DT104 was the most frequently determined phagetype (N=98, 29.6% of 333 S. Typhimurium typed). Resistance to antimicrobials occurred in 52.5% of all isolates, mainly in the multiresistant phagetype DT1 04. In less than half of the submissions (44%), other pathogens were isolated as well. In cases of clinical diarrhoea, multiple pathogens and pathogens with multiple antimicrobial resistance may be involved and therapy and preventive measures should be adjusted accordingly.</p>