Serovars of Salmonellaisolated from Danish turkeys between 1995 and 2000 and their antimicrobial resistance

• Published in: Veterinary record 2002-04, Vol.150 (15), p.471-474
• Main Authors: Pedersen, K., Hansen, H. C., Jørgensen, J. C., Borck, B.
• Format: Article
• Language: English
• ISSN: 0042-4900; 2042-7670
• DOI: 10.1136/vr.150.15.471

The prevalence of Salmonellaserovars and their antimicrobial resistance patterns were investigated among Danish turkeys between 1995 and 2000, by sampling the flocks approximately 14 days before they were slaughtered. Within the flocks, the prevalence of salmonella varied from 7.1 per cent to 25 per cent, and 24 different serovars were detected. The five most prevalent, which accounted for 58.5 per cent of the isolates were SalmonellaHeidelberg (16.2 per cent of the isolates), SalmonellaAgona (15.8 per cent), SalmonellaDerby (12.4 per cent), SalmonellaMuenster (7.3 per cent) and SalmonellaAnatum (6.8 per cent). In addition, a few rough isolates and isolates belonging to the antigenically incomplete formulae 6,7:‐:‐ and 4,12:b:‐ were found. The level of antimicrobial resistance was low; the highest resistance was recorded to ampicillin (13.7 per cent) and streptomycin (9.0 per cent) followed by tetracycline (8.5 per cent), sulphonamides (7.7 per cent) and spectinomycin (4.7 per cent). Resistance to quinolones was very low: four isolates were resistant to nalidixic acid, and only one was resistant to enrofloxacin. No resistance was recorded to colistin, apramycin, ceftiofur, florfenicol, or amoxycillin with clavulanic acid. Only 24 isolates were resistant to two or more compounds in various combinations of up to six compounds; one SalmonellaHavana isolate was resistant to six compounds. Six isolates were serovar Typhimurium, but none of them belonged to phage type DT104.