Candida sp. These yeasts are normally commensal in the vagina but may become pathogenic if the pH of the vagina changes as in pregnancy.Infection is common in immunocompromised patients. The yeasts are 3-7 microns in length They appear gray-brown or eosinophilic with the Papanicolaou stain. Pseudohyphae are  formed by elongated budding of the yeast cells and  show constrictions. Culture is necessary to distinguish species. Infection is characterised clinically by white itchy discharge and white patches on vagina and cervical mucosa.