Article
Multidisciplinary Sciences
Milsan Getu Banu, Endrias Zewdu Geberemedhin
Summary: This study investigated the occurrence and antimicrobial resistance of Staphylococcus aureus in milk in the Oromia region of Ethiopia, as well as the knowledge, attitude, and practice of farmers regarding antimicrobial resistance. The results showed a high occurrence of S. aureus in milk samples, with widespread resistance to multiple antibiotics. Farmers had insufficient understanding and practice regarding antimicrobial resistance factors. Therefore, training and surveillance programs are needed to mitigate public health risks.
Article
Infectious Diseases
Corina Pascu, Viorel Herman, Ionica Iancu, Luminita Costinar
Summary: This study investigated the bacteria and antimicrobial resistance in bovine mastitis in the western part of Romania. Staphylococcus spp. was the most prevalent bacteria, and Gram-negative bacteria showed higher susceptibility to penicillins and quinolones.
Article
Infectious Diseases
Lei Dong, Lu Meng, Huimin Liu, Haoming Wu, Martine Schroyen, Nan Zheng, Jiaqi Wang
Summary: The effects of ceftiofur and cefquinome on the fecal microbiota and antibiotic resistance genes of dairy cows with mastitis were investigated in this study. The results showed that cephalosporin treatment significantly decreased microbial diversity and richness, and increased the relative abundance of certain bacterial taxa and two beta-lactam resistance genes.
Article
Agriculture, Dairy & Animal Science
R. Dyson, N. Charman, A. Hodge, S. M. Rowe, L. F. Taylor
Summary: This study described the pathogen profile in cows with clinical and subclinical mastitis in southeastern Australia and examined the antimicrobial susceptibility of isolated pathogens. The most common bacteria causing clinical mastitis were Streptococcus uberis, while Staphylococcus aureus was the most common cause of subclinical mastitis. The prevalence of antimicrobial resistance among common isolates was low.
JOURNAL OF DAIRY SCIENCE
(2022)
Review
Microbiology
Debora Brito Goulart, Melha Mellata
Summary: This article provides a comprehensive review of mastitis caused by mammary pathogenic Escherichia coli (MPEC), including information on the types of mastitis, host immune response, diagnosis, treatment, and control of the disease. It also discusses the virulence factors and antimicrobial resistance of MPEC, as well as the challenges posed by MPEC as a new pathotype. The information presented in this review is critical for identifying knowledge gaps and guiding future research and therapeutic interventions for this significant dairy disease.
FRONTIERS IN MICROBIOLOGY
(2022)
Article
Agriculture, Dairy & Animal Science
S. McDougall, J. Penry, D. Dymock
Summary: The study indicated that bacterial isolates from organic herds had lower antibiotic resistance compared to herds using dry cow therapy (DCT). However, the differences in MIC distributions occurred below clinical breakpoints, suggesting that bacteriological cure rates may not be affected by isolates with different MIC levels.
JOURNAL OF DAIRY SCIENCE
(2021)
Article
Agriculture, Dairy & Animal Science
Saranya G. Narayana, Flavio Schenkel, Filippo Miglior, Tatiane Chud, Emhimad A. Abdalla, S. Ali Naqvi, Francesca Malchiodi, Herman W. Barkema
Summary: Mastitis is a common disease in dairy cattle, causing economic losses to farmers. This study aimed to assess genetic variation of overall and pathogen-specific intramammary infections in primiparous and multiparous cows. Genetic analysis revealed substantial variation for pathogen-specific IMI traits, indicating the potential for genetic selection to improve resistance to specific pathogens.
JOURNAL OF DAIRY SCIENCE
(2021)
Article
Infectious Diseases
Zorana Kovacevic, Marko Samardzija, Olga Horvat, Dragana Tomanic, Miodrag Radinovic, Katarina Bijelic, Annamaria Galfi Vukomanovic, Nebojsa Kladar
Summary: The main objective of this study was to quantify antimicrobial use (AMU) on three dairy farms in Serbia and investigate the association between AMU and the emergence of antimicrobial resistance (AMR) in mastitis-associated pathogens. The results confirmed a relationship between the use of common antibiotics in mastitis treatment and AMR of isolated mastitis-associated pathogens, highlighting the importance of this aspect in combating global antimicrobial resistance.
Article
Infectious Diseases
Anri Timonen, Marju Sammul, Suvi Taponen, Tanel Kaart, Kerli Motus, Piret Kalmus
Summary: This study investigated the usage of antimicrobial drugs in cows with clinical mastitis in large dairy herds in Estonia. The findings revealed that different treatment methods and drugs could impact the outcome of the treatment, and further research is needed to understand the factors that influence veterinarians' choices.
Article
Agriculture, Dairy & Animal Science
Lishan Lin, Xiaojun Huang, Hongfei Yang, Yixuan He, Xuefeng He, Jinhu Huang, Siyan Li, Xiaoliang Wang, Shu Tang, Guangjin Liu, Zihao Pan
Summary: In this study, 42 strains of Streptococcus agalactiae were isolated from dairy cows in China. Through capsular typing and multilocus sequence typing, the lineages and populations of the isolates were identified. The study revealed the predominance of CC103 lineage, virulence profile 1, and variations in antimicrobial resistance profiles.
JOURNAL OF DAIRY SCIENCE
(2021)
Article
Immunology
Luciana Hernandez, Enriqueta Bottini, Jimena Cadona, Claudio Cacciato, Cristina Monteavaro, Ana Bustamante, Andrea Mariel Sanso
Summary: This study characterized molecular features of S. agalactiae strains causing bovine mastitis in Argentina, revealing serotypes III and II as the most prevalent, virulence genes spb1, hylB, cylE, and PI-2b present in all isolates, and varied frequencies of antibiotic resistance genes.
FRONTIERS IN CELLULAR AND INFECTION MICROBIOLOGY
(2021)
Article
Agriculture, Dairy & Animal Science
Diego Borin Nobrega, Aline Parolin Calarga, Leandro Costa Nascimento, Carla Gasparotto Chande Vasconcelos, Eliane Martins de Lima, Helio Langoni, Marcelo Brocchi
Summary: This observational study investigated the phenotypic and genotypic patterns of antimicrobial resistance in Klebsiella pneumoniae isolated from Brazilian dairy herds. The study found higher antimicrobial resistance rates in isolates from intramammary infections, and identified specific genetic variants and ESBL genes among extended-spectrum beta-lactamase producers. Common resistance was detected against tetracycline, streptomycin, and sulfamethoxazole-trimethoprim, with tetA, sul2, and floR being the most frequently observed AMR genes in resistant isolates.
JOURNAL OF DAIRY SCIENCE
(2021)
Article
Infectious Diseases
Tahir Lubna, Tahir Hussain, Ashwag Shami, Naseem Rafiq, Shehryar Khan, Muhammad Kabir, Naimat Ullah Khan, Irfan Khattak, Mustafa Kamal, Tahir Usman
Summary: The main objectives of this study were to determine the antimicrobial resistance pattern of S. aureus in raw milk and to detect the presence of mecA and tetK genes in it. Out of the 150 milk samples tested, S. aureus was detected in 55 (37%) of them, with 11 of them being multidrug-resistant strains. The highest resistance was found to penicillin (100%) and oxacillin (100%), while amoxicillin and ciprofloxacin were found to be susceptible (100%). The presence of mecA and tetK genes was detected in 9 and 7 of the multidrug-resistant S. aureus isolates, respectively.
Article
Veterinary Sciences
Seda Ozdikmenli Tepeli
Summary: This study investigated dairy farmers' knowledge, attitudes, and practices regarding mastitis management, antibiotic use, and antimicrobial resistance in Turkey. The study involved face-to-face surveys with 455 dairy farmers from villages in canakkale. The survey included 62 questions divided into 5 categories. The results showed that a significant portion of farmers were unaware of the term "antimicrobial resistance" and believed that antibiotic residues do not enter the environment through animal wastes. Antibiotic therapy was commonly used for udder diseases like mastitis, and farmers relied heavily on veterinarian recommendations for treatment decisions. The study also revealed a lack of awareness about hygiene practices and alternative treatments for mastitis.
PREVENTIVE VETERINARY MEDICINE
(2023)
Article
Agriculture, Dairy & Animal Science
Anna Duse, Karin Persson-Waller, Karl Pedersen
Summary: The study revealed the most important bacterial pathogens and their resistance patterns in Sweden regarding mastitis, with low antibiotic resistance among both Gram-positive and Gram-negative agents, indicating good potential for antibiotic treatment.
Review
Agriculture, Dairy & Animal Science
J. H. Britt, R. A. Cushman, C. D. Dechow, H. Dobson, P. Humblot, M. F. Hutjens, G. A. Jones, P. S. Ruegg, I. M. Sheldon, J. S. Stevenson
JOURNAL OF DAIRY SCIENCE
(2018)
Article
Agriculture, Dairy & Animal Science
S. A. Metzger, L. L. Hernandez, J. H. Skarlupka, G. Suen, T. M. Walker, P. L. Ruegg
JOURNAL OF DAIRY SCIENCE
(2018)
Article
Agriculture, Dairy & Animal Science
Alessio Cecchinato, Tania Bobbo, Pamela L. Ruegg, Luigi Gallo, Giovanni Bittante, Sara Pegolo
JOURNAL OF DAIRY SCIENCE
(2018)
Editorial Material
Veterinary Sciences
Pamela L. Ruegg, Christina S. Petersson-Wolfe
VETERINARY CLINICS OF NORTH AMERICA-FOOD ANIMAL PRACTICE
(2018)
Article
Veterinary Sciences
Stephanie A. Metzger, Laura L. Hernandez, Garret Suen, Pamela L. Ruegg
VETERINARY CLINICS OF NORTH AMERICA-FOOD ANIMAL PRACTICE
(2018)
Article
Agriculture, Dairy & Animal Science
M. J. Fuenzalida, P. L. Ruegg
JOURNAL OF DAIRY SCIENCE
(2019)
Article
Agriculture, Dairy & Animal Science
M. J. Fuenzalida, P. L. Ruegg
JOURNAL OF DAIRY SCIENCE
(2019)
Editorial Material
Agriculture, Dairy & Animal Science
T. F. Gressley, P. L. Ruegg
JOURNAL OF DAIRY SCIENCE
(2019)
Article
Agriculture, Dairy & Animal Science
M. J. Fuenzalida, P. L. Ruegg
JOURNAL OF DAIRY SCIENCE
(2020)
Article
Agriculture, Dairy & Animal Science
M. J. Fuenzalida, P. L. Ruegg
JOURNAL OF DAIRY SCIENCE
(2019)
Article
Agriculture, Dairy & Animal Science
E. S. Binversie, P. L. Ruegg, D. K. Combs, T. L. Ollivett
JOURNAL OF DAIRY SCIENCE
(2020)
Review
Microbiology
Pamela L. Ruegg
Summary: The use of antimicrobials in food-producing animals is facing increased scrutiny and regulations to maintain the efficacy of antimicrobials for human diseases. Consumers are skeptical about antibiotic use in dairy cows, while dairy producers and veterinarians have mixed feelings about reducing antimicrobial usage and animal welfare. Antimicrobial stewardship focuses on preventing bacterial diseases and using evidence-based treatment protocols. Implementing antimicrobial stewardship in the dairy industry requires recognizing appropriate usage and understanding the benefits. This paper defines elements of antimicrobial stewardship in dairy practice and discusses the challenges and potential benefits.
Article
Microbiology
Juliano L. Goncalves, Juliana L. de Campos, Andrew J. Steinberger, Nasia Safdar, Ashley Kates, Ajay Sethi, John Shutske, Garret Suen, Tony Goldberg, Roger Cue, Pamela L. Ruegg
Summary: This study aimed to describe the occurrence and treatment of mastitis and other common bovine diseases using retrospective observational data from large dairy farms in Wisconsin. Clinical mastitis is the most diagnosed disease among dairy cows, and a significant number of cows do not receive antibiotics after being diagnosed.
Article
Veterinary Sciences
Stephanie A. Metzger, Laura L. Hernandez, Joseph H. Skarlupka, Teresa M. Walker, Garret Suen, Pamela L. Ruegg
FRONTIERS IN VETERINARY SCIENCE
(2018)
Article
Education & Educational Research
Maria C. Cordoba, Pamela L. Ruegg, Randy D. Shaver, Kent A. Weigel, Paulo D. Carvalho, Paul M. Fricke, Victor E. Cabrera
JOURNAL OF EXTENSION
(2018)