Objective: to estimate the inci- dence of teacher dysphonic disease in or- der to subsequently delineate prevention programs. Methods: a representative sam- ple of teachers from different institutes in Catania, i.e. nursery, elementary, secon- dary and high school, were admitted to a test program. Results: The analysed cards were 379. 46- % of teachers frequently showed an altera- tion of the characters of the voice, 43% ra- rely showed it while only 11% did not show such alteration. The dysphonic disease was present in teachers that reported one or more of following pathologies: allergies, gastric disturb and thyroid pathologies. On the contrary this disease was not present in those who were not suffering from such a pathologies. 24% of teachers have repor- ted to have been absent from school be- cause of dysphonia. Conclusions: this study puts in evidence that teacher vocal sickness is only partially referable to the specific professional activity, but it is lar- gely due to a psycho-physics pre- disposition. More studies are however ne- cessary in order to specify the role of working and extra working factors in this group of voice practitioners.