Cheyletiella dermatitis. A mite infestation of rabbit, cat, dog, and man

Abstract

Two patients with recurrent, intensely pruritic, grouped red papules on the chest, abdomen, and thighs were examined and found to have Cheyletiella dermatitis. Cheyletiella, a nonburrowing species of mite, was isolated from fur brushings of the household pets, including one dog and two cats. Treatment of the affected pets resulted in complete resolution of symptoms and signs in both animals and patients. This appears to be the third instance of human Cheyletiella dermatitis recorded in North America.

Şeyletiella Dermatiti: Olgu Sunumu

“…4,9 Şeyletiella dermatiti klinik olarak şüphelenilmediği takdirde tanı konulması zor olan bir dermatolojik hastalıktır. 2 Bu nedenle tekrarlayan kaşıntılı döküntü şikâyeti ile başvuran kişilerde özellikle kedi olmak üzere evcil hayvan yetiştirme öyküsü de varsa ayırıcı tanıda şeyletiella dermatitinin düşünülmesi gerekir. Biz de akarı kesin olarak gösteremesekte klinik olarak lezyonların kedinin temas ettiği bölgeye sınırlı olması ve histopatolojik inceleme sonucuna göre şeyletiella dermatiti tanısını koyduk.…”

Systemic manifestations of Cheyletiella infestation in man

“…8 These obligate parasites complete their life-cycle on one host. 9,10 The mites rapidly move over the skin surface within pseudo-tunnels in keratinous debris and feed on tissue fluid. 11 The adult mite is 590 µ m long and 250 µ m wide.…”

“…11 The adult mite is 590 µ m long and 250 µ m wide. 10 While larvae, nymphs and adult males die within 48 h if separated from the host; adult females (possibly eggs too) can survive in household conditions for at least 10 days. 12 Only rarely, do unattached "free-living" Cheyletiella mites cause dermatitis.…”

“…The mites rapidly move over the skin surface within pseudo‐tunnels in keratinous debris and feed on tissue fluid 11 . The adult mite is 590 µm long and 250 µm wide 10 . While larvae, nymphs and adult males die within 48 h if separated from the host; adult females (possibly eggs too) can survive in household conditions for at least 10 days 12 .…”

Clinical applications of topical ivermectin in dermatology

“…The infected animal is asymptomatic except for excessive dandruff on the back. Rarely, free-living Cheyletiella mites cause dermatitis in humans, characterized by intensely pruritic papules, necrotic lesions, vesiculobullous or blistering skin lesion characteristically distributed on areas of contact with the infested animal [80,81].Treatment of the affected animal with weekly applications of topical acaricidal products such as pyrethroids is often sufficient. Naturally occurring cheyletiellosis has been effectively treated with twice, three-week interval of subcutaneous 300 pg/kg IVM injection in dogs [82].…”