Forrester D J, Spalding M G, Wooding J B
Department of Infectious Diseases, College of Veterinary Medicine, University of Florida, Gainesville 32610.
J Wildl Dis. 1993 Jan;29(1):136-8. doi: 10.7589/0090-3558-29.1.136.
Demodicosis was diagnosed in five black bears (Ursus americanus) from north-central Florida. The first bear examined, a 5-yr-old male, had severe alopecia except for the dorsal neck, paws, and ears. The skin was characterized by moderate orthokeratotic hyperkeratosis, and mild to moderate follicular hyperkeratosis. Superficial dermatitis, follicular pustules, and epidermal pustules were present, but rare. Specimens of Demodex sp. were seen most commonly within hair follicles devoid of hair and at the infundibulum of sebaceous glands. Four additional bears from the same area also had some degree of alopecia and skin scrapings were positive for Demodex sp. This mite may be common, although its prevalence is not known.
在佛罗里达州中北部的五只黑熊（美洲黑熊）身上诊断出了蠕形螨病。第一只接受检查的熊是一只5岁的雄性，除了颈部背部、爪子和耳朵外，全身严重脱毛。皮肤的特征是中度正角化性角化过度，以及轻度至中度毛囊角化过度。存在浅表性皮炎、毛囊脓疱和表皮脓疱，但较为罕见。蠕形螨属的标本最常见于无毛发的毛囊内以及皮脂腺漏斗部。来自同一地区的另外四只熊也有一定程度的脱毛，皮肤刮片检查发现蠕形螨属呈阳性。这种螨虫可能很常见，尽管其流行率尚不清楚。
