Which statement best describes the prevalence data for Campylobacter in poultry and swine?

• A. Campylobacter jejuni in poultry is 100%; Campylobacter coli in swine is >99%
• B. Campylobacter jejuni in poultry is 50%; Campylobacter coli in swine is 25%
• C. Campylobacter jejuni in poultry is 0%; Campylobacter coli in swine is 0%
• D. Campylobacter jejuni in poultry is 75%; Campylobacter coli in swine is 60%

Answer: (A)

Prevalence patterns show that Campylobacter is carried by these animals at very high rates, but the dominant species differs by host. In poultry, Campylobacter jejuni is the primary species found, and birds are colonized essentially across the entire population encountered in production and processing—approaching universal presence. In swine, Campylobacter coli is the dominant species, and the overall prevalence of Campylobacter is also extremely high, typically exceeding 99% in tested animals. This reflects how the two species preferentially colonize different hosts and the widespread exposure in animal production.

The other statements underplay how common this colonization is and misrepresent the species distribution, which is why the described pattern—C. jejuni in poultry at near 100% prevalence and C. coli in swine at greater than 99%—best fits the data.