Systematic Veterinary Virology

SYMPTOMS AND LESIONS

• There are two forms cutaneous (dry pox) and diphtheritic (wet pox). The cutaneous form is characterised by the development of proliferative lesions, ranging from small nodules to spherical wart-like masses on the skin of the comb, wattle and other unfeathered areas. In the diphtheritic form (wet pox), slightly elevated white opaque nodules develop on the mucous membranes.
• They rapidly increase in size to become a yellowish diphtheritic membrane. In this form the lesions occur on the mucous membranes of the mouth, oesophagus, larynx or trachea.