A farmer notices that his pigs are showing signs of lameness, vesicles on the snout and feet, and excessive salivation. The most likely disease affecting the pigs is

Foot-and-mouth disease (FMD) is characterised by vesicles (fluid-filled blisters) on the feet, snout, and mouth, accompanied by excessive salivation and lameness. African swine fever causes haemorrhagic symptoms, swine erysipelas causes skin lesions, and Newcastle disease primarily affects poultry.