The presentation of papular urticaria is not associated to mosquito exposure or sensitization

Abstract

There was a significant difference in house dust microbiota among different urbanization areas. The areas with a lower urbanization level presented higher dust-borne bacterial richness and diversity. Thus, modern urbanization has influence on the bacterial microbiome profiles of indoor dust.

What is causing this patient's severe itching?

“…Papular urticaria is caused by a hypersensitivity to mosquito and arthropod bites, most commonly fl eas. 1,2 This condition is commonly distributed on exposed skin such as forearms; however, it typically presents earlier in life, as young as age 1 year and resolving as early as age 7 years. 2 Papular urticaria presents with severe pruritus and in the form of papules, vesicles, or wheals.…”

“…Although the patient had a past medical history of eczematous dermatitis, atopic dermatitis was ruled out clinically because she did not have asthma or allergy symptoms and did not have scaling plaques in the flexor surfaces and eyelids. Papular urticaria is caused by a hypersensitivity to mosquito and arthropod bites, most commonly fleas 1,2. This condition is commonly distributed on exposed skin such as forearms; however, it typically presents earlier in life, as young as age 1 year and resolving as early as age 7 years 2.…”