Corynebacterium vaginale

Area of Science:

• Microbiology
• Sexually Transmitted Infections
• Vaginal Health

Background:

• Corynebacterium vaginale, first identified in 1953, is a significant cause of bacterial vaginitis.
• This organism utilizes glycogen from vaginal epithelial cells, leading to characteristic symptoms.

Purpose of the Study:

• To describe the characteristics and etiological role of Corynebacterium vaginale in bacterial vaginitis.
• To understand the transmission dynamics and nutritional requirements of the organism.

Main Methods:

• Microscopic examination of vaginal discharge, noting cell composition and bacterial morphology.
• Assessment of vaginal pH and Gram staining characteristics.
• Evaluation of nutritional requirements and antibiotic sensitivity patterns.

Main Results:

• Corynebacterium vaginale causes a malodorous vaginal discharge with high pH (5.0-5.5), primarily containing epithelial cells and bacilli.
• Infected men are asymptomatic carriers, facilitating sexual transmission.
• The organism requires specific nutrients (B-vitamins, purines, pyrimidines, fermentable carbohydrate) but not factors X or V.

Conclusions:

• Corynebacterium vaginale exhibits mixed Gram-positive and Gram-negative characteristics, challenging its classification.
• It is not a Haemophilus species and likely not a true Corynebacterium.
• As the causative agent of bacterial vaginitis, C. vaginale is potentially the most prevalent sexually transmitted organism.