Pathogenic fungusPathogenic fungi are fungi that cause disease in humans or other organisms. Although fungi are eukaryotic, many pathogenic fungi are microorganisms. Approximately 300 fungi are known to be pathogenic to humans; their study is called "medical mycology". Fungal infections kill more people than either tuberculosis or malaria—about 2 million people per year. In 2022 the World Health Organization (WHO) published a list of fungal pathogens which should be a priority for public health action.