Therapeutic effects of a combined antibiotic-enzyme treatment on subclinical mastitis in lactating dairy cows

B. Khoramian, M. Emaneini, M. Bolourchi, A. Niasari-Naslaji, A. Gorganzadeh, S. Abani and P. Hovareshti
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B. Khoramian: Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran
M. Emaneini: School of Medicine, Tehran University of Medical Sciences. Tehran, Iran
M. Bolourchi: Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
A. Niasari-Naslaji: Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
A. Gorganzadeh: Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran
S. Abani: Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran
P. Hovareshti: Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran

Veterinární medicína, 2016, vol. 61, issue 5, 237-242

Abstract: ABSTRACT: The objective of this study was to evaluate a combined antibiotic-enzyme therapy for Staphylococcus aureus mastitis and biofilm formation. A total of 141 cases of S. aureus chronic mastitis from three farms were divided into two groups: the control group (n = 54) were treated with Nafpenzal® ointment; the enzyme + antibiotic group (n = 87) were treated with Nafpenzal® plus an enzymatic ointment (MastiVeyxym®). Quantitative determination of biofilm formation was determined using a colorimetric microplate assay and the detection of ica genes by PCR. Enzyme + antibiotic therapy did not significantly improve cure rates compared to control (48.3 vs 38.9%). The cure rate for infections caused by biofilm-positive strains was 42.6 and 46.6% for control and enzyme + antibiotic groups, respectively (P > 0.05). Comparison of cure rates between farms showed a relationship with somatic cell count (SCC), parity and oxacillin resistance. 79.4% of the isolates produced biofilm and antibacterial resistance rates for oxacillin, penicillin and streptomycin were 25.5, 71.6 and 95.7%, respectively. These results indicate that while the increase in mastitis cure rate using enzymatic therapy was not significant, this treatment could be useful in some situations.

Keywords: mastitis; Staphylococcus aureus; biofilm; enzyme-antibiotic treatment; genomic DNA; ica genes (search for similar items in EconPapers)
Date: 2016
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlvet:v:61:y:2016:i:5:id:8876-vetmed

DOI: 10.17221/8876-VETMED

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