Etiological agent: Parapoxvirus, "Paravaccinia" subgroup (the same subgroup as Pseudocowpox of the teat and udder skin in cattle and Contagious ecthyma in sheep).
Symptoms: superficial papules and vesicles on the muzzle, gums, and palate of young calves, which sometimes converge and coalesce. No systemic symptoms and spontaneous recovery within a few days.
Differential diagnosis: BHV-1, BVD-MD, Foot-and-mouth disease, Vesicular stomatitis, dermatomycosis, abrasions.
