Pigeon pox, rarely, can cause severe deformity. Here a pox vesicle has damaged the blood supply to the bones of the face and upper beak leading to the loss of these structures.
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Pigeon pox vesicles on the beak of a 7-day-old youngster. For the vesicle to be this size at this age, this youngster must have become infected virtually in the first day of life.
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