Babeș's scientific endeavours were wide-ranging. He was the first to demonstrate the presence of tuberculous bacilli in the urine of infected patients. He also discovered cellular inclusions in rabies-infected nerve cells. Of diagnostic value, they were to be named after him (Babeș-Negri bodies). Babeș was the promoter of morphopathological conception about the infectious process, medical guidelines based on the synthesis between bacteriology and pathological anatomy. Babeș was credited with inventing the first rationalized model of thermostat and some methods for staining bacteria and fungi in histological preparations and cultures.