The branch continued to invite its own speakers until 1963, when the parent Society created the Foundation for Microbiology. Foundation speakers then filled this role. During the first 30 years, the meetings were usually held at New Scotland Ave, but occasionally at other members' institutions. The programs and abstracts of the presentations were published until 1947 in the Journal of Bacteriology. From 1965 until the early 1990s,, the Sterling-Winthrop Research Institute has generously hosted the ENYB's annual spring meeting, highlighted by a Foundation Lecture and dinner.
Microbiology is, of course, a vast and dynamic field.
Over the past half-century, as new clinical and research interests evolved, the presentations and lectures at the ENYB meetings evolved with them. In the 1930s, the topics were chiefly medical microbiology. The emphasis was on diagnosis and treatment of Streptococcal infections, bacterial toxicoses, tuberculosis, syphilis, and gonorrhea. During World War II, the list expanded to include other communicable diseases, rickettsial infections, and malaria. Virology became an important topic in the early 1940s, with presentations on polio and rabies viruses.