Medical Microbiology comprises and integrates the fields of immunology,
bacteriology, virology, mycology, and parasitology, each of which has seen
considerable independent development in the past few decades. The com-
mon bond between them is the focus on the causes of infectious diseases
and on the reactions of the host to the pathogens. Although the advent of
antibiotics and vaccines has certainly taken the dread out of many infectious
diseases, the threat of infection is still a fact of life: New pathogens are con-
stantly being discovered; strains of „old“ ones have developed resistance to
antibiotics, making therapy more and more difficult; incurable infectious dis-
eases (AIDS, rabies) are still with us.