A fungus (a form of yeast) that can cause infection of the mouth, throat, and genitalia. In patients with weakened immune systems infections can be present in the blood or organs. This is a much more serious infection than the more common mouth or genital infection. This infection is more common in diabetics, patients taking antibiotics, and in patients with weakened immune systems (including cancer patients and patients with HIV infection). This is also a common infection in healthy women with 75% having a vaginal candida infection in their lifetime.