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Clinical Examination of Farm Animals - CYF MEDICAL DISTRIBUTION

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CHAPTER 4<br />

Area <strong>of</strong> hair loss<br />

Figure 4.9 Calf with milk scald. See text for<br />

details.<br />

Scaling and deep fissures<br />

Figure 4.10 Calf with photosensitisation.<br />

Note lesions on unpigmented part <strong>of</strong> the<br />

back.<br />

affected areas may also be seen. Local skin necrosis<br />

may be caused by faeces adhering to the tail and drying<br />

out, compromising the circulation <strong>of</strong> the skin.<br />

Congenital causes <strong>of</strong> skin disease<br />

A number <strong>of</strong> hereditary defects have been recorded<br />

in calves. Affected animals are born with partial or<br />

complete alopecia, or less commonly the condition<br />

develops within the first few weeks <strong>of</strong> life. There are<br />

usually no other abnormalities. The exact nature<br />

<strong>of</strong> the defect may require histological and genetic<br />

evaluation.<br />

Telogen effluvium<br />

This is a non-specific skin lesion seen in calves<br />

recovering from severe illnesses such as Escherichia<br />

26

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