Which of the following is a component of Lawsonia control in swine?

• A. Culling of all affected animals
• B. Vaccination, sanitation, disinfection, and rodent control
• C. Exclusive reliance on antibiotics
• D. Complete feed withholding

Answer: (B)

Preventing Lawsonia intracellularis infections in pigs relies on an integrated approach that combines vaccination with strong hygiene and environment management. Vaccination primes the pigs’ immune system to reduce lesion formation and clinical signs, while sanitation and disinfection lessen environmental contamination and lower exposure risk. Rodent control helps remove another potential reservoir and reduces indirect spread. Together, these practices provide a comprehensive prevention strategy rather than relying on a single method. Culling all affected animals is excessive and not practical, antibiotics alone don’t prevent infection or environmental contamination, and withholding feed doesn’t address transmission or disease prevention.