Moriello Karen A, Newbury Sandra, Steinberg Howard
School of Veterinary Medicine, University of Wisconsin-Madison, 2015 Linden Drive West, Madison, WI 53706, USA.
Vet Dermatol. 2013 Aug;24(4):460-2, e106. doi: 10.1111/vde.12028. Epub 2013 Apr 29.
Feline demodicosis is caused by infestation with Demodex cati and/or Demodex gatoi. These two mites have distinctive morphological appearances.
To describe five observations of a morphologically distinct feline Demodex mite in 10 cats. All cats were in or adopted from an animal shelter.
A mite with blunted ends longer than D. gatoi but shorter than D. cati was observed in one or multiple cats from animal shelters. Mean mite size was 139 ± 4.5 μm (n = 41 mites). Similar features among the cases included a history of recent recovery or presence of concurrent illness at the time of diagnosis. Pruritus was variable. Hairs were easily epilated in large amounts, and mites were found on either skin scrapings or hair trichograms; mites were most commonly found on the proximal third of hairs examined via trichogram.
Reports of this mite are uncommon but when present tend to be in cats with concurrent illnesses. Awareness of this mite morphology will hopefully provide other investigators with specimens for molecular testing to determine whether this is a third species or a variant of D. gatoi or D. cati.
猫蠕形螨病由猫蠕形螨和/或加氏蠕形螨感染引起。这两种螨虫具有独特的形态外观。
描述在10只猫中观察到的5例形态独特的猫蠕形螨。所有猫均来自动物收容所或从动物收容所领养。
在来自动物收容所的一只或多只猫中观察到一种螨，其末端钝圆，长度比加氏蠕形螨长但比猫蠕形螨短。螨的平均大小为139±4.5μm（n = 41只螨）。这些病例的相似特征包括近期康复史或诊断时存在并发疾病。瘙痒情况不一。毛发容易大量脱落，在皮肤刮片或毛发毛干检查中发现螨虫；通过毛干检查，螨虫最常见于所检查毛发的近端三分之一处。
关于这种螨虫的报道并不常见，但出现时往往见于患有并发疾病的猫。了解这种螨虫的形态有望为其他研究人员提供用于分子检测的标本，以确定这是第三种蠕形螨物种还是加氏蠕形螨或猫蠕形螨的变种。
