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Article

Prevalence, Patterns, Association with Biofilm Formation, Effects on Milk Quality and Risk Factors for Antibiotic Resistance of Staphylococci from Bulk-Tank Milk of Goat Herds

1
Veterinary Faculty, University of Thessaly, 43100 Karditsa, Greece
2
University Hospital of Larissa, 41110 Larissa, Greece
3
Faculty of Public and One Health, University of Thessaly, 43100 Karditsa, Greece
4
Faculty of Animal Science, University of Thessaly, 41110 Larissa, Greece
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Department of Agriculture, University of Ioannina, 47132 Arta, Greece
6
Department of Agriculture, Food, Natural Resources and Engineering (DAFNE), University of Foggia, 71122 Foggia, Italy
*
Author to whom correspondence should be addressed.
Academic Editor: Helena Felgueiras
Antibiotics 2021, 10(10), 1225; https://doi.org/10.3390/antibiotics10101225
Received: 17 September 2021 / Revised: 5 October 2021 / Accepted: 6 October 2021 / Published: 8 October 2021
The objectives of this work were to study the prevalence and the patterns of antibiotic resistance of staphylococcal isolates from bulk-tank milk of goat herds across Greece, to assess possible associations of the presence of antibiotic resistance with the quality of milk in these herds and to evaluate herd-related factors potentially associated with the presence of antibiotic resistance among these staphylococcal isolates. A cross-sectional study was performed on 119 goat herds in Greece. Bulk-tank milk samples were collected for bacteriological examination; staphylococcal isolates were evaluated for resistance to 20 antibiotics. Oxacillin-resistant, resistant to at least one antibiotic, and multi-resistant staphylococcal isolates were recovered from 5.0%, 30.3%, and 16.0% of herds, respectively. Of 80 isolates, 7.5% were resistant to oxacillin, 50.0% were resistant to at least one antibiotic and 27.5% were multi-resistant. Resistance was seen more frequently among coagulase-negative staphylococci (59.3%) than among Staphylococcus aureus (23.8%). Resistance was more frequent against penicillin and ampicillin (41.3% of isolates) and fosfomycin (27.5%). No association was found with biofilm formation by staphylococci. For recovery of oxacillin-resistant isolates, the presence of working staff in the herds emerged as a significant factor; respective factors for the isolation of staphylococci resistant to at least one antibiotic were part-time farming and high (>10) number of systemic disinfections in the farm annually. The same three factors concurrently were also identified to be significant for the recovery of multi-resistant isolates. View Full-Text
Keywords: bulk-tank milk; mastitis; methicillin; milk; goat; somatic cell counts; staphylococcus; tetracycline; total bacterial counts bulk-tank milk; mastitis; methicillin; milk; goat; somatic cell counts; staphylococcus; tetracycline; total bacterial counts
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MDPI and ACS Style

Lianou, D.T.; Petinaki, E.; Cripps, P.J.; Gougoulis, D.A.; Michael, C.K.; Tsilipounidaki, K.; Skoulakis, A.; Katsafadou, A.I.; Vasileiou, N.G.C.; Giannoulis, T.; Katsarou, E.I.; Voidarou, C.; Mavrogianni, V.S.; Caroprese, M.; Fthenakis, G.C. Prevalence, Patterns, Association with Biofilm Formation, Effects on Milk Quality and Risk Factors for Antibiotic Resistance of Staphylococci from Bulk-Tank Milk of Goat Herds. Antibiotics 2021, 10, 1225. https://doi.org/10.3390/antibiotics10101225

AMA Style

Lianou DT, Petinaki E, Cripps PJ, Gougoulis DA, Michael CK, Tsilipounidaki K, Skoulakis A, Katsafadou AI, Vasileiou NGC, Giannoulis T, Katsarou EI, Voidarou C, Mavrogianni VS, Caroprese M, Fthenakis GC. Prevalence, Patterns, Association with Biofilm Formation, Effects on Milk Quality and Risk Factors for Antibiotic Resistance of Staphylococci from Bulk-Tank Milk of Goat Herds. Antibiotics. 2021; 10(10):1225. https://doi.org/10.3390/antibiotics10101225

Chicago/Turabian Style

Lianou, Daphne T., Efthymia Petinaki, Peter J. Cripps, Dimitris A. Gougoulis, Charalambia K. Michael, Katerina Tsilipounidaki, Anargyros Skoulakis, Angeliki I. Katsafadou, Natalia G.C. Vasileiou, Themis Giannoulis, Eleni I. Katsarou, Chrysoula Voidarou, Vasia S. Mavrogianni, Mariangela Caroprese, and George C. Fthenakis. 2021. "Prevalence, Patterns, Association with Biofilm Formation, Effects on Milk Quality and Risk Factors for Antibiotic Resistance of Staphylococci from Bulk-Tank Milk of Goat Herds" Antibiotics 10, no. 10: 1225. https://doi.org/10.3390/antibiotics10101225

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