In: Stary A, ed. Proceedings of the Third Meeting of the European Society for Chlamydia Research. Vienna, Austria: Società Editrice Esculapio, Bologna, 1996; 226**
Addresses an important methodological issue surrounding interpretation of C. pneumoniae serologic patterns. In retrospect, one of the serological criteria associated with acute infection in young adults with acute respiratory illness did not accurately indicate acute infection in older adults with chronic asthma. This appears to be the first discussion of a conundrum that is now widely accepted (see Dowell-CDC).