Figure 4From: Avipoxviruses: infection biology and their use as vaccine vectorsAvipoxvirus infection of a great tit ( Parus major ) (left) and a common magpie ( Pica pica ) (right). The protecting feather coat is destroyed. Proliferative lesions and crust are seen, with secondary bacterial infection (Photo: Gunnar Holt, National Veterinary Institute, Oslo, Norway).Back to article page