Final answer:
Bacterial vaginosis (BV) is the cause of irritation, itching, and frothy yellow-green discharge in the vagina and vulva. It is an inflammation caused by an imbalance in the normal vaginal bacteria. Diagnosis involves examining the discharge, and treatment includes antibiotics or anti-fungal medications.
Step-by-step explanation:
The irritation and itching of the vagina and vulva, along with a frothy yellow-green discharge, are associated with a condition called bacterial vaginosis (BV). BV is an inflammation of the vagina caused by an imbalance in the normal vaginal microbiota, leading to an overgrowth of bacteria. The major causative agent is Gardnerella vaginalis, along with other anaerobic species such as Bacteroides and Fusobacterium.
Diagnosis of BV can be done by examining the characteristics of the discharge, such as color, consistency, and pH level. Treatment usually involves oral or topical antibiotics or anti-fungal medications based on the causative agent.