Diseases of the Integumentary System

Chapter 65 Diseases of the Integumentary System


Skin problems are not uncommon in sheep and goats. These conditions can lead to loss of production through decreased growth, damage to the fiber, and weight loss. History, clinical signs, and a good physical examination are critical in determining the cause of the skin problems.



CONTAGIOUS ECTHYMA (SORE MOUTH, ORF)


Contagious ecthyma is caused by a parapoxvirus, and shows a preference for attacking epithelial tissues. The virus is present throughout the world and remains active in the environment for months, if not years. Transmission is through direct contact or contamination of skin abrasions, and morbidity is greatest in animals that are grazing course pasture plants.




CLINICAL SIGNS



• Papules, vesicles, pustules

• Thick crusts, especially around mouth (Fig. 65-1)

• Lesions may spread to oral cavity, eyelids, feet, udder

• Lesions typically resolve in 2 weeks

image

Figure 65-1 Malignant contagious ecthyma. Note lesions around mouth, eyes, and on face.


(From Pugh DG: Sheep and goat medicine, Philadelphia, 2002, WB Saunders, by permission.)



DIAGNOSIS



• Examination of a skin biopsy


TREATMENT



• Treatment of individual animals is generally not needed unless the lesions are severe; then supportive care is needed.



TECH ALERT


This is a zoonotic disease. Wear gloves and maintain good hygiene when handling infected animals.



INFORMATION FOR CLIENTS



• Contagious ecthyma is a highly zoonotic disease, and hygiene is important when handling affected animals.


DERMATOPHILOSIS


Dermatophilosis is usually seen during wet or moist conditions; it is caused by the bacterium Dermatophilosis congolensis. The causative organisms become trapped in the hair or wool and reproduce in the moist environment. The condition can be passed by direct contact or transfer from inanimate objects.




CLINICAL SIGNS



• Matting of hair, followed by alopecia and crusting

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Aug 31, 2016 | Posted by in GENERAL | Comments Off on Diseases of the Integumentary System

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