gamasoidosis

Gamasoidosis, also known as dermanyssosis, is a frequently unrecognized form of zoonotic dermatitis, following human infestation with avian mites of the genera Dermanyssus or Ornithonyssus. It is characterized by pruritic erythematous papules, macules and urticaria, with itching and irritation resulting from the saliva the mites secrete while feeding. These bites are observed all over the body. The avian mite Dermanyssus gallinae can also infest various parts of the body, including the ear canal and scalp.

Diagnosis is challenging due to the mites' size, requiring microscopic identification by a medical entomologist, and the clinical symptoms often mimic other conditions, such as scabies or allergic reactions. The atypical or delayed responses to mite bites, coupled with widespread ignorance and misinformation among healthcare providers, scientists, and pest control professionals, contribute to frequent underdiagnosis and misdiagnosis, hindering effective management and treatment.