Effects of a species-specific probiotic formulation on multiresistant Escherichia coli isolates from the gut of veal calves
Articolo
Data di Pubblicazione:
2013
Citazione:
Effects of a species-specific probiotic formulation on multiresistant Escherichia coli isolates from the gut of veal calves / B. Ripamonti, E. Tirloni, S. Stella, C. Bersani, A. Agazzi, S. Maroccolo, G. Savoini. - In: CZECH JOURNAL OF ANIMAL SCIENCE. - ISSN 1212-1819. - 58:5(2013), pp. 201-207.
Abstract:
In this study, 254 Escherichia coli isolates from faecal samples of veal calves were evaluated for
antimicrobial susceptibility using the disk diffusion method. During the experimental period, six mass antibiotic
treatments were administered to the animals (about one treatment per month). The active principles used
were oxytetracycline, colistin, tylosin, doxycycline, chlortetracycline, and sulphonamides. An extremely high
resistance prevalence (> 70%) towards penicillin, sulphonamide, tetracycline, ampicillin, and spyramicin was
detected. Sixty E. coli isolates could be defined as multiresistant, showing resistance to at least 6 antimicrobial
classes. Subsequently, we evaluated the inhibitory effect of a species-specific probiotic against multiresistant
E. coli, showing its beneficial action with large inhibition halos for 76% of the isolates. This suggests the potentiality
of the probiotic, putting in evidence a clear advantage of its use in veal calves nutrition, in particular
during the first phases, when the animals are more susceptible to severe enteric infections by E. coli.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Lactic acid bacteria ; antibiotic resistance ; prevalence ; gastrointestinal functionality
Elenco autori:
B. Ripamonti, E. Tirloni, S. Stella, C. Bersani, A. Agazzi, S. Maroccolo, G. Savoini
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