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Photomicrographs of Skin from Zinc-Deficient Calves

Dairy Department, University of Georgia, Athens

ABSTRACT

A zinc deficiency in calves was experimentally produced, studied, and described in previous publications (3, 4). Of the lesions produced in the zinc-deficient calves, the most distinguishing characteristic was in the skin. This condition, which is called parakeratosis, is very similar in gross appearance to hyperkeratosis (1). Parakeratosis and hyperkeratosis can be readily distinguished by histological sections of the skin (1, 2).

When the description of the zinc deficiency was published no photomicrographs of the affected skin sections were included (3, 4). Since that time requests have been received from pathologists and others for slides or photomicrographs of the sections. These are needed to aid in determining whether an animal might be suffering from a zinc deficiency, or parakeratosis. Thus, the purpose of this note is to publish photomicrographs from animals which were made zinc-deficient in the previous study (3).

Details of the development of the zinc deficiency have been described previously (3).

¹ Present address: UT-AEC Agricultural Research Laboratory, Oak Ridge, Tennessee.