Despite the major developments in the therapeutic armamentarium for the treatment of infection, the morbidity and mortality of this complication remains very high in patients with compromised defences. Cancer and its treatment represents a major predisposing condition to a variety of infections. These adverse events are still with us, in spite of much progress in the therapy of infectious disease, since cancer therapy is becoming more aggressive, yet further lowering the host's capacity to cope with infections. Moreover, the pathogens adapt effectively to drugs, and at a pace that might...