 Based on these studies Dr. Wittmann habilitated for Professor of Surgery at University of Hamburg defending his thesis about the concentration dynamics of antimicrobials intra-abdominal infections.In 1972 Dr. Wittmann had the opportunity to work in Annaba, Algeria, and took his young family to Algeria for an anticipated two year commitment.After a year political unrest forced the Wittmanns to return to Germany but by then he had seen many diseases in their advanced stages including abdominal infections.