Abstract
SKIN coloration from bluish-black pigment, melanin, has been observed recently as a major problem in many turkey flocks in the United States and Canada. The coloration, while obvious in live turkeys, is more pronounced following processing at sub-scald water temperature. There is considerable variation in the pigment intensity and dispersion over the skin surface. The objectionable coloration has resulted in down-grading of dressed turkeys.In referring to skin pigmentation in turkeys it is necessary to distinguish between the so-called “blue-back” and dermal melanosis. Blue-back is the result of melanin spreading in skin tissue from damaged immature feathers of colored varieties of turkeys. The blue-back areas are usually the tail, hips, back, neck and tops of wings where damage from feather picking or treading occurs. Skin tissue over the keel may also show damage as a result of irritation from roosting.Dermal melanosis is characterized by melanin deposition in skin tissue…
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