Candidiasis of larynx. Endoscope view of the larynx (voice box) of a patient suffering from candidiasis (white patches, upper left). This is a fungal infection that affects the moist areas of the body, often in patients who have weakened immune systems or those who have been taking broad-spectrum antibiotics. The fungus Candida albicans is the most common cause. Candidiasis is treated with a course of anti-fungal drugs.