These three cases, in addition to others reported in the literature, point out an as yet poorly known etiology of occupational asthma to quaternary ammonium compounds in hospital employees. The exact mechanism of the action remains unexplained.

Supplemental Digital Content is Available in the Text.The observed shift in the tyrosine pathway in saliva of burning mouth syndrome patients may indicate an adaptative response to chronic pain or an impaired dopaminergic transmission.

No abstract