RESUMO
Objective To investigate the infestation status and environment tolerance of ornithonyssus bacoti (O. bacoti) in stored traditional Chinese herb Semen Coicis (Coix seed). Methods 800 g of stored Semen Coicis was initially taken, and subjected to passing a 40-mesh sampling sieve. Then 80 g of Coix seed particles was sampled to directly isolate the mites that were made into slide specimen in conventional technique, and identified as the procedures described in previous literature. Results A total of 449 mites were isolated from the 80 g stored Semen Coicis particles, and were identified as O. bacoti. Conclusions O.bacoti was first detected in the stored traditional Chinese medicinal Semen Coicis with which infestation is serious. This status should call out attention to prevent the disease associated with transmission of pathogens from O.bacoti.
RESUMO
Rat mite dermatitis caused by Ornithonysus bacoti, commonly referred to as the tropical rat mite, is characterized by pruritic papules in patients exposed to tropical rat mite. Histopathologic sections from the lesions of infected patients show moderate perivascular lymphohistiocytic infiltration intermingled with some eosinophils. Causative female mites, Ornithonyssus bacoti, can be collected from around the skin lesions. The conclusive diagnosis of tropical rat mite dermatitis is based on the identification of the arthropod O. bacoti at the home of the patient (husbandry of gerbils, etc.). Moreover, the diagnosis of rat mite dermatitis requires the detection of the parasite, which is more likely to be found in the host's environment rather than on the host's skin. We report a case of rat mite dermatitis in a 22-year-old female who presented with pruritic, multiple, erythematous papules on the abdomen, back and axilla.