The state of antitetanus protection in the commune of Perugia.

A serological survey was carried out on the population in the Perugia district to assess the protection level against tetanus. The antitoxin titre was evaluated by indirect haemagglutination test in 983 sera from healthy subjects of both sexes and all age-groups. Only 285 males and 144 females, 33.47% of the subjects, had been immunized prior to the investigation. The research made it clear that the serological antibody level does not always correspond to the anamnestic data on previous immunization. Therefore, it appears that prophylactic treatment against tetanus should be based on objective data, that is, serum antibody titre, in all subjects at risk. This information, thanks to the indirect haemagglutination test, is not difficult to obtain.