[Statistical and epidemiological studies on cases of infectious mononucleosis treated in the Infectious Diseases Division of the Livorno Hospitals between 1964 and 1977].

Reference is made to a series of 133 patients with infectious mononucleosis admitted to a hospital department over a period of 14 yr. The incidence of the disease is assessed in terms of sex, age, season, and occupation. Its duration and the average length of hospital stay are also computed. Particular attention is directed to 25 cases with a negative serum finding.