Longitudinal Characterization of Mastitis-causing Pathogens Previously Identified as 'Other Streptococcal species,' including Lactococcus

摘要

Identification of Streptococcus agalactiae and Streptococcus dysgalactiae isolated from milk using standard microbiological methods is accurate when compared to 16S sequencing (Wyder, 2011). The remaining gram-positive, catalase negative cocci (GPCN)found in milk including the of genera Streptococcus, Lactococcust Enterococcus, and Aerococcus, cannot be easily or economically differentiated using biochemical tests (Fortin et al., 2003). As a result, these pathogens are frequently reported as "Streptococcus species," making it difficult to assess the importance of the differing organisms (Plumed-Ferrer et al., 2015). The objective of this study was to compare bacteriological cure, risk of recurrent mastitis, and longevity within the herd among different GPCN organisms on 5 farms in Northern New York.