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https://doi.org/10.46419/cvj.57.5.9
Diversity and Antimicrobial Resistance Profile of Bacteria Isolated from Sheep Mastitis and Bulk-Tank Milk in the East-Centre Region of Portugal
Maria Aires Pereira
; Instituto Politécnico de Viseu, Escola Superior Agrária de Viseu, Av. Dr. António Almeida Henriques, 3500-631 Viseu, Portugal; CERNAS-IPV Research Centre, Instituto Politécnico de Viseu, Campus Politécnico, Repeses, 3504-510 Viseu, Portugal; Global Health and Tropical Medicine, GHTM, Associate Laboratory in Translation and Innovation Towards Global Health, LA-REAL, Instituto de Higiene e Medicina Tropical, IHMT, Universidade NOVA de Lisboa, UNL, Rua da Junqueira 100, 1349-008 Lisboa, Portugal
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Alexandra Lameira Baptista
; Instituto Politécnico de Viseu, Escola Superior Agrária de Viseu, Av. Dr. António Almeida Henriques, 3500-631 Viseu, Portugal; CERNAS-IPV Research Centre, Instituto Politécnico de Viseu, Campus Politécnico, Repeses, 3504-510 Viseu, Portugal; Universidade de Trás-os-Montes e Alto Douro, Quinta de Prados 5000-801, Vila Real, Portugal
Mariana Rosário
; Instituto Politécnico de Viseu, Escola Superior Agrária de Viseu, Av. Dr. António Almeida Henriques, 3500-631 Viseu, Portugal
Rita Marisa da Silva Cruz
; Instituto Politécnico de Viseu, Escola Superior Agrária de Viseu, Av. Dr. António Almeida Henriques, 3500-631 Viseu, Portugal; Epidemiology Research Unit (EPIUnit), Instituto de Saúde Pública da Universidade do Porto, Rua das Taipas 135, 4050-600, Porto, Portugal; Laboratory for Integrative and Translational Research in Population Health (ITR), Rua das Taipas 135, 4050-600, Porto, Portugal
Fernando Alexandre de Almeida Esteves
; Instituto Politécnico de Viseu, Escola Superior Agrária de Viseu, Av. Dr. António Almeida Henriques, 3500-631 Viseu, Portugal; CERNAS-IPV Research Centre, Instituto Politécnico de Viseu, Campus Politécnico, Repeses, 3504-510 Viseu, Portugal
João Madanelo
; Instituto Politécnico de Viseu, Escola Superior Agrária de Viseu, Av. Dr. António Almeida Henriques, 3500-631 Viseu, Portugal
Ana Cristina Pais Mega de Andrade
; Instituto Politécnico de Viseu, Escola Superior Agrária de Viseu, Av. Dr. António Almeida Henriques, 3500-631 Viseu, Portugal; CERNAS-IPV Research Centre, Instituto Politécnico de Viseu, Campus Politécnico, Repeses, 3504-510 Viseu, Portugal
Carla Garcia
; Instituto Politécnico de Viseu, Escola Superior Agrária de Viseu, Av. Dr. António Almeida Henriques, 3500-631 Viseu, Portugal
Catarina Coelho
; Instituto Politécnico de Viseu, Escola Superior Agrária de Viseu, Av. Dr. António Almeida Henriques, 3500-631 Viseu, Portugal; CERNAS-IPV Research Centre, Instituto Politécnico de Viseu, Campus Politécnico, Repeses, 3504-510 Viseu, Portugal
Carla Sofia Arede dos Santos
; Instituto Politécnico de Viseu, Escola Superior Agrária de Viseu, Av. Dr. António Almeida Henriques, 3500-631 Viseu, Portugal
Madalena Malva
; Instituto Politécnico de Viseu, Escola Superior de Tecnologia e Gestão de Viseu, Avenida Cidade Politécnica, 3504-510, Viseu, Portugal
Helena Vala
; Instituto Politécnico de Viseu, Escola Superior Agrária de Viseu, Av. Dr. António Almeida Henriques, 3500-631 Viseu, Portugal; CERNAS-IPV Research Centre, Instituto Politécnico de Viseu, Campus Politécnico, Repeses, 3504-510 Viseu, Portugal; Veterinary and Animal Research Centre (CECAV), UTAD, Associate Laboratory for Animal and Veterinary Sciences (AL4AnimalS), Quinta de Prados, Apartado 1013, 5000-801, Vila Real, Portugal
Tiago Ferreira
; Australian Laboratory Services (ALS), Zona Industrial de Tondela Lote 6, 3460-070, Tondela, Portugal
* Dopisni autor.
Sažetak
The microbiological quality of milk reflects both udder health and the subsequent contamination that can occur through direct and indirect reservoirs. This study aimed to identify bacterial diversity in milk samples from ewes with mastitis and in bulk-tank milk, and to investigate their antibiotic susceptibility/resistance profiles. A total of 232 milk samples were analysed and 22 bacterial species were isolated, with Staphylococcus aureus (20.3%) and S. epidermidis (18.6%) as the dominant species. The diversity of bacterial species isolated from the bulk-tank was higher and included 44 species, dominated by E. coli (20.6%), S. aureus (7.8%) and Hafnia alvei (7.2%). Antimicrobial susceptibility testing was performed on 217 bacterial isolates. E. coli isolated from individual milk samples revealed high rates of resistance to penicillins and tetracyclines, whereas S. aureus revealed high rates of resistance to aminoglycosides, polymyxin, sulfonamides and tetracycline, maintaining high levels of susceptibility to third generation cephalosporins, lincosamides, some macrolides, penicillins, phenicols and pleuromutilins. The resistance profile of bacteria isolated from the bulk-tank milk was more concerning than that of the milk of ewe with mastitis. These results point to the need to implement structural improvements on farms and raise awareness about strengthening biosecurity, medical prophylaxis and control of access to veterinary medicines to improve milk quality and reduce the use of antibiotics.
Ključne riječi
Escherichia coli; coagulase-negative Staphylococcus; Staphylococcus aureus; intramammary infection; bulk-tank milk; antimicrobial susceptibility testing
Hrčak ID:
347600
URI
Datum izdavanja:
15.9.2026.
Posjeta: 0 *