Bovine Papillomatosis (Warts): Cattle Welfare Guide

Key Facts

• Caused by bovine papillomaviruses (BPV types 1-6), transmitted by direct contact or shared equipment
• Most common in cattle 6 months to 2 years old — older animals develop immunity
• Lesions typically appear on the head, neck, and shoulders but can affect the teats and penis
• Teat papillomas interfere with milking machine attachment and predispose to mastitis
• Most cases resolve spontaneously within 6-18 months without treatment

Welfare Considerations

Bovine papillomatosis has variable welfare impact. Facial and neck warts in young cattle are generally cosmetic and cause minimal discomfort unless very large or located over joints. Teat warts have greater welfare significance: they cause pain at milking, interfere with milk letdown, and predispose to mastitis. Penile papillomas can cause pain during mating. In rare cases, very large or confluent masses restrict movement or vision. Individual wart removal by ligation or cryotherapy is indicated for welfare-impactful lesions; autogenous vaccines can be used in herd outbreaks.

What You Can Do

• Avoid sharing needles, ear tags, and grooming equipment between animals to limit spread
• Treat teat papillomas promptly — their impact on milking welfare and mastitis risk is significant
• Consult your vet about autogenous vaccine preparation if herd outbreaks occur
• Monitor young stock and isolate new animals until papillomas have resolved
• Remove very large lesions by ligation under local anesthesia to prevent movement restriction