Detection and Characterization of Salmonella spp. in Raw Commingled Bulk Tank Milk from Dairies in Pennsylvania
Related Experiment Video
Updated: Jan 26, 2026

Author Spotlight: Development of an Enhanced Protocol for Rapid and Accurate Isolation of Campylobacter from Food Products
Published on: February 23, 2024
Michael Nagoette1, Dawn Miller1, Lisa Dettinger2
11 Pennsylvania Veterinary Laboratory, Harrisburg, Pennsylvania.
Abstract:
A microbiological survey was conducted to determine the presence of Salmonella spp. in raw commingled bulk tank milk (BTM) collected from the Pennsylvania dairies intended for pasteurization. The survey found 8.1% (10/123) of samples positive for Salmonella. Salmonella Cerro was the predominant serovar and genetic analysis of the Salmonella Cerro showed the existence of diverse yet closely related genotypes. Antibiotic susceptibility testing conducted on all isolates showed pan-susceptible pattern against 15 drugs covering 9 drug classes. The study helped determine the presence of Salmonella spp. in the commingled BTM, antibiotic susceptibility patterns, and serovars along with genotypic diversity among the predominant serovar, Salmonella Cerro.
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