Raw milk safety relies on competitive exclusion by beneficial bacteria.

• A. True
• B. False
• C. It does not apply in milk
• D. Not sure

Answer: (B)

Competitive exclusion by beneficial bacteria is not a reliable safety mechanism for raw milk. While in some fermented dairy products starter cultures and the resulting acidic environment can help suppress certain pathogens, raw milk is not fermented or consistently protected by a defined microbial community. The proven safety measures for raw milk are proper sanitation during milking, rapid cooling, and, most importantly, pasteurization to kill harmful pathogens. Without these controls, the presence of beneficial bacteria does not guarantee safety, and contamination with pathogens like Salmonella, Campylobacter, or E. coli O157:H7 can still pose a risk.