*Deeper fibronecrotic lesions associated with [[Fusobacterium necrophorum|''Fusobacterium necrophorum'']] - yellowish fibronecrotic membrane, when removed, leaves ulcerated surface | *Deeper fibronecrotic lesions associated with [[Fusobacterium necrophorum|''Fusobacterium necrophorum'']] - yellowish fibronecrotic membrane, when removed, leaves ulcerated surface |