| Autor: |
Bortolami L; Istituto Zooprofilattico Sperimentale delle Venezie, Viale dell'Università, 10, Legnaro, 35020 Padova, Italy., Barberio A; Istituto Zooprofilattico Sperimentale delle Venezie, Viale dell'Università, 10, Legnaro, 35020 Padova, Italy., Schiavon E; Istituto Zooprofilattico Sperimentale delle Venezie, Viale dell'Università, 10, Legnaro, 35020 Padova, Italy., Martignago F; Istituto Zooprofilattico Sperimentale delle Venezie, Viale dell'Università, 10, Legnaro, 35020 Padova, Italy., Littamè E; Istituto Zooprofilattico Sperimentale delle Venezie, Viale dell'Università, 10, Legnaro, 35020 Padova, Italy., Sturaro A; Istituto Zooprofilattico Sperimentale delle Venezie, Viale dell'Università, 10, Legnaro, 35020 Padova, Italy., Gagliazzo L; Istituto Zooprofilattico Sperimentale delle Venezie, Viale dell'Università, 10, Legnaro, 35020 Padova, Italy., De Lucia A; Azienda ULSS 3, Via 29 Aprile, 2, Dolo, 30031 Venezia, Italy., Ostanello F; Department of Veterinary Medical Sciences, University of Bologna, Via Tolara di Sopra, 50, Ozzano dell'Emilia, 40064 Bologna, Italy. |
| Abstrakt: |
This surveillance study aimed to estimate the proportion of antimicrobial resistant strains and antimicrobial resistance (AMR) profiles of E. coli isolates detected from the intestinal contents of veal and dairy calves in the Veneto Region, Northeaster Italy. Additionally, we investigated the differences in AMR profiles between dairy and veal calves over the period 2017-2022. Overall 1150 E. coli isolates were tested from calves exhibiting enteric disease, with 868 from dairy and 282 from veal calves. The percentage of resistant isolates to nine antimicrobials was notably higher in veal calves compared to dairy calves, except for ampicillin. Throughout the study period, we observed a significant increase in the proportion of resistant isolates to florfenicol, gentamycin, paromomycin, tetracycline and trimethoprim/sulfamethoxazole in dairy calves, while we did not detect any significant increase in the proportion of resistant isolates among veal calves. A substantial proportion (75.9%) of the isolated E. coli exhibited multi-drug resistance (MDR). The proportion of multi-drug resistant isolates was significantly higher in veal calves (91.7%) compared to dairy calves (74.3%) all through the surveillance period (2017-2022), with no significant variation in MDR proportion among veal calves between 2017 and 2022 but a significant increase among dairy calves. |
