We report three cases of rat mite dermatitis caused by Ornithonyssus bacoti(Hirst, 1913), commonly referred to it as the tropical rat mite.
The first case, a 26-year old female had multiple pinhead sized vesicles with peripheral erythematous macule on the upper arms. The second case, a 34-year old female had multiple variable sized vesicles with erythematous base on the extremeties.
The
third case, a 43-year old male had multiple erythematous macules and papules with contral punctum on the trunk and extremities.
Histopathologic sections from lesions of the first and second patient showed moderate perivascular lymphohistiocytic infiltration intermingled with some eosinophils.
Causative mites, Ornithonyssus bacoti, female were collected around the skin lesion in case 1, from the house dust in case 2 and furniture in case 3. (Kor J Dermatol 1993 ; 31 (1) : 99-104)
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