Record Display for the EPA National Library Catalog


Main Title Epidemiological Studies of Otitis Externa: Report of a Prospective and of a Retrospective Study of Otitis Externa Among Swimmers.
Author Calderon, Rebecca L. ; Mood, Eric W. ;
CORP Author Yale Univ., New Haven, CT. Dept. of Epidemiology and Public Health.;Heath Effects Research Lab., Cincinnati, OH.
Year Published 1981
Report Number EPA-80234;
Stock Number PB81-226136
Additional Subjects Ear diseases ; Epidemiology ; Infectious diseases ; Fresh water ; Age ; Sex ; Swimming pools ; Chlorination ; Humidity ; Temperature ; Pseudomonas ; Coliform bacteria ; Aquatic microbiology ; Otis externa ; Staphylococcus aureus
Library Call Number Additional Info Location Last
NTIS  PB81-226136 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 50p
Two epidemiological studies of otitis externa were conducted, one was a prospective study conducted in the summer of 1979 which compared boy scouts at camp that swam in a fresh water lake with boy scouts at another camp that swam in a chlorinated swimming pool, and the other was a retrospective study conducted at Yale University during the summer of 1980. The prospective study yielded no cases of otitis externa; the retrospective study compared 29 cases with 29 controls who were matched by age and sex. In the prospective study a higher relative humidity at the camp where the boy scouts swam in a chlorinated pool was associated with a greater degree of abnormal flora colonization of the ear (Gram-negative bacteria and S. aureus). In the retrospective study, positive association was demonstrated with cases of otitis externa for ambient air temperatures, water temperature, less than 18 years of age, being female, swimming and length of time spent swimming. There was no association between cases of otitis externa and water quality as measured by fecal coliforms enterococci and P. aeruginosa and between abnormal flora colonization of the ear with bacterial indices of water quality.