Antimicrobial resistance and resistance gene determinants in clinical Escherichia coli from different animal species in Switzerland

Lanz, Roland; Kuhnert, Peter; Boerlin, Patrick (2003). Antimicrobial resistance and resistance gene determinants in clinical Escherichia coli from different animal species in Switzerland. Veterinary microbiology, 91(1), pp. 73-84. Amsterdam: Elsevier 10.1016/S0378-1135(02)00263-8

[img] Text
Ecoli_Resitance.pdf - Published Version
Restricted to registered users only
Available under License Publisher holds Copyright.

Download (198kB) | Request a copy

Antimicrobial susceptibility testing was performed on a total of 581 clinical Escherichia coli isolates from diarrhea and edema disease in pigs, from acute mastitis in dairy cattle, from urinary tract infections in dogs and cats, and from septicemia in laying hens collected in Switzerland between 1999 and 2001. Among the 16 antimicrobial agents tested, resistance was most frequent for sulfonamides, tetracycline, and streptomycin. Isolates from swine presented significantly more resistance than those from the other animal species. The distribution of the resistance determinants for sulfonamides, tetracycline, and streptomycin was assessed by hybridization and PCR in resistant isolates. Significant differences in the distribution of resistance determinants for tetracycline (tetA, tetB) and sulfonamides (sulII) were observed between the isolates from swine and those from the other species. Resistance to sulfonamides could not be explained by known resistance mechanisms in more than a quarter of the sulfonamide-resistant and sulfonamide-intermediate isolates from swine, dogs and cats. This finding suggests that one or several new resistance mechanisms for sulfonamides may be widespread among E. coli isolates from these animal species. The integrase gene (intI) from class I integrons was detected in a large proportion of resistant isolates in association with the sulI and aadA genes, thus demonstrating the importance of integrons in the epidemiology of resistance in clinical E. coli isolates from animals.

Item Type:

Journal Article (Original Article)


05 Veterinary Medicine > Department of Infectious Diseases and Pathobiology (DIP) > Institute of Veterinary Bacteriology

UniBE Contributor:

Kuhnert, Peter


500 Science
500 Science > 570 Life sciences; biology
600 Technology > 630 Agriculture








Peter Kuhnert-Ryser

Date Deposited:

24 Jan 2014 08:50

Last Modified:

06 Dec 2014 06:03

Publisher DOI:


PubMed ID:


Uncontrolled Keywords:

Escherichia coli, Antimicrobial resistance, Sulfonamide, Streptomycin, Tetracycline, Integron




Actions (login required)

Edit item Edit item
Provide Feedback