Which of the following is least likely to cause vesicular lesions in swine?

• A. Foot and mouth disease
• B. Rinderpest
• C. Swine vesicular disease
• D. Pigs housed on concrete

Answer: (B)

Vesicular lesions in swine are produced by a small group of viral diseases that specifically create vesicles on mucous membranes and the skin, especially around the mouth, snout, tongue, and feet. Foot-and-mouth disease virus and swine vesicular disease virus are classic examples in pigs, with vesicles being a hallmark of infection. Rinderpest, on the other hand, is a morbillivirus that primarily affects cattle and is not characterized by vesicular lesions in swine. In pigs, rinderpest can cause fever and mucosal erosions, but vesicles are not a typical or defining feature. Therefore, it is the least likely to cause vesicular lesions in swine. The option describing housing on concrete isn’t a disease and doesn’t inherently cause vesicles, but the question centers on infectious vesicular disease potential, and rinderpest lacks that vesicular presentation in swine.