In this study of an epizootic Cogrossi formulated much of the modern theory of infection. He speculated that infection might occur at the microscopic level, and argued that infected individuals should be isolated and cured, that those believed to have been exposed to the disease should be isolated, and that the personal belongings of both groups should be disinfected to exterminate the causitive agent and its eggs. He also speculated on the entrance routes of the infection and its transmission through secretions and excretions of the infected animal. Facsimile reprint with English translation by D.M. Schullian and foreword by L. Belloni, Roma, Società Italiana di Microbiologia, 1953.