Publications by authors named "P L Ruegg"
Our objectives were to describe the confirmed bacteriological diagnosis of mastitis pathogens cultured from cases of nonsevere clinical mastitis (CM) identified as gram-positive (GP) using on-farm culture and to compare differences in bacteriological cure (BC) based on antimicrobial (AM) therapy. Cows that developed nonsevere CM in a single quarter were enrolled in a randomized clinical trial based on microbial growth on GP selective agars. Cows were randomly assigned to receive a once-daily intramammary treatment: 3 d hetacillin (n = 69), 3 d ceftiofur (n = 69), 8 d ceftiofur (n = 70), or to a nontreated group (n = 32).
View Article and Find Full Text PDFThe objective of this observational study was to estimate partial direct costs of dry cow antibiotic therapy (DCT) protocols used on 37 large dairy herds in Wisconsin and to estimate the potential monetary savings and reduction in antimicrobial usage (AMU) if selective DCT was used. Partial direct costs of DCT were calculated using costs of intramammary (IMM) antimicrobials and teat sealants. Data were retrospectively collected on 37 large dairy farms for a period of 1 yr and included the total number of cows dried off, types of IMM antimicrobial used, and product prices (obtained from farm invoices).
View Article and Find Full Text PDFHemotropic mycoplasmas are unculturable bacteria that infect the surface of red blood cells of several mammalian species including cattle. The importance of hemoplasmas in cattle remains unclear and limited information is available about biological routes of transmission. The objective of this cross-sectional study was to determine the prevalence of transplacental transmission of hemoplasmas and to determine if colostrum of infected cows contained DNA from hemoplasma organisms.
View Article and Find Full Text PDFArticle Synopsis
- * A training session for dairy farm workers was conducted to enhance their understanding of proper milking procedures, focusing on mastitis risk factors and the significance of each step in the milking process.
- * Results showed a significant increase in knowledge and improvement in milking practices post-training, such as better disinfectant use and reduced inadequate preparation times, which positively influenced udder health and milk quality.
Article Synopsis
- On March 24, 2024, the USDA confirmed the first case of highly pathogenic avian influenza H5N1 in dairy cattle, which later spread to humans and affected 192 herds in 13 states.
- The emergence of this virus presents a significant threat to the dairy industry, highlighting the need for integrated approaches to human, animal, and environmental health.
- Strategies such as enhancing biosecurity, improving surveillance, and advancing research are crucial for managing the outbreak and protecting public health and dairy production.