[Mycotoxins and "yellow rain"].

A review is given of mycotoxins with a brief history of the role of these natural poisons in human pathology. Contributions of Croatian scientists to the field of research in mycotocixology are recorded. Opposite views and arguments are presented considering the technical possibilities and ethical responsibilities for abuse of mycotoxins as a war weapon especially with regard to their alleged use in the recent chemical warfare in the Middle and Far East. "Yellow Rain" is described as a natural phenomenon.