- Hospital staff
- Office staff
Bat excreta, Guano.
Incidence: very low. The subjects are almost always atopic. IgE-dependent mechanism.
The illness is associated with certain regions in Africa (Sudan) where the bats nest in roofs and ceilings.
Asthma and rhinitis symptoms appear when the subject stays in an infested building.
Skin prick test with an extract prepared from bat's droppings.
Immunological assay: RAST/CAP RAST bat (special coupling).