In 1946–48 the Institutes of Pathophysiology and Microbiology functioned as one faculty under the directorship of professor Sándor Belák. This marvellous old building at Hôgyes Endre street 7–9 housed previously the laboratories of Endre Hôgyes who produced the Pasteur-Roux type rabies vaccine; and those of Hugó Preisz who described first developmental forms of bacteria that were later referred to as pleuropneumonia-like growth phase (but professor Preisz called these developmental forms „Pettenkofferia”).