Fungi are a diverse group of organisms that are not plants but rather form their own kingdom. They play important roles in decomposition, fermentation, and as pathogens. In the Bible, fungi were described as causing various skin lesions as well as destroying buildings, clothes, and harvests. Modern examples of pathogenic fungi include those that cause ringworm, athlete's foot, mold in buildings, and mildew on clothes. Symptoms caused by fungi can affect multiple body systems and manifest as issues with the skin, respiratory system, heart, reproductive system, and gastrointestinal tract. Management involves removing sources of fungi and using antifungal treatments and diet.