PMC8478119_01
PMC8478119_02
Alpaca (case no. 1), ear pinnae. Evolution of skin lesions from severe crusting dermatitis, hyperkeratosis, focal ulceration, alopecia, and scaling (a) to moderate to severe crusting, hyperkeratosis, scaling, erythema and alopecia (b) to mild to moderate alopecia, erythema and scaling (c) to mild alopecia and erythema (d).
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F1
Clinical inspection revealed extreme agitation due to pruritus and the presence of scaly, crusty lesions on the external ears accompanied by local alopecia, hyperkeratosis, and thickened skin (Figure 1a). The monthly evolution of the skin lesions is presented in Figure 1.
Morphological features of Sarcoptes scabiei mites.
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F2
The mites were morphologically identified as Sarcoptes scabiei (Figure 2).
Llamas (case no. 2), skin lesions. (a) Hind limb (after clipping): alopecia, moderate to severe erythema, severe scaling and focal crusts; (b) Hind limbs, perianal, peri vulvar region and ventral aspect of the tail: alopecia, mild erythema and scaling and mild, focal lichenification; (c) Ventral abdomen and axillae: extensive alopecia, moderate to severe erythema and focal hyperpigmentation.
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F3
At first consultation (Day 0), severe itching was obvious on both llamas though skin lesions were far more extensive in Cuzco, including: severe, diffuse scaling, particularly noticeable after hair clipping; skin reddening on the belly, axillae and, to a lower extent, on forelegs and hind limbs; hair thinning to alopecia on the belly, axillae, forelegs, distal fore and hind limbs, posterior and internal aspects of the proximal hind limbs; skin wrinkling on the last mentioned areas on the hind limbs; soft and relatively thin (<= 2 mm) exudative crusts on medial cantus of the eye, the ventral aspect of the tail, the perianal zone and the perineum (Figure 3).