vulvovagynitis detailed for orals
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Now I have comprehensive data from multiple authoritative sources. Let me compile the complete oral-ready guide.
Vulvovaginitis — Complete Oral Guide
DEFINITION & OVERVIEW
Vulvovaginitis = inflammation of the vulva and vagina, presenting with burning, irritation, itching, odor, and/or abnormal vaginal discharge. It is the most common gynecologic disorder in women of all age groups.
- ~30% of women with vaginal complaints have no identifiable etiology even after comprehensive testing
- More than one cause can be present simultaneously (polymicrobial)
- Clinical diagnosis alone is unreliable — objective testing is essential
NORMAL VAGINAL PHYSIOLOGY
| Feature | Normal Value |
|---|---|
| pH | 3.8–4.5 |
| Flora | Lactobacilli dominant |
| Discharge | Odorless, variable consistency |
Mechanism of protection:
Estrogen → thick epithelium with glycogen-laden cells → Lactobacilli metabolize glycogen → lactic acid + acetic acid → acidic pH → inhibits pathogens
Pre-pubertal / post-menopausal: Low estrogen → thinner epithelium, pH 6–7 → more susceptible to infection
ETIOLOGY (Big 3 — Memorize)
| Type | Causative Agent | Frequency |
|---|---|---|
| Bacterial Vaginosis (BV) | Gardnerella vaginalis + anaerobes (Prevotella, Mobiluncus, Mycoplasma, Ureaplasma) | 40–50% |
| Vulvovaginal Candidiasis | Candida albicans (90%), C. glabrata, others | 20–25% |
| Trichomoniasis | Trichomonas vaginalis | 15–20% |
Non-infectious causes: Contact/irritant (bubble bath, spermicides), atrophic vaginitis (postmenopausal), foreign body, lichen sclerosus, post-radiation
COMPARISON TABLE (High-Yield)
| Feature | Candidal VVC | Trichomoniasis | Bacterial Vaginosis |
|---|---|---|---|
| Organism | Candida albicans | T. vaginalis (flagellated protozoan, STI) | G. vaginalis + anaerobes |
| Symptoms | Vulvar pruritus, burning, dyspareunia | Profuse discharge, pruritus, odor | Fishy-smelling discharge (often asymptomatic) |
| Discharge | White, thick, curdy/cottage-cheese; adherent plaques | Frothy, greenish-yellow, malodorous, profuse | Thin, white/gray, homogeneous; coats vaginal walls |
| Vaginal pH | ≤4.5 | ≥5 | >4.5 |
| KOH whiff test | Negative | May be positive | Positive (fishy odor) |
| Microscopy (saline) | Pseudohyphae + budding yeast | Motile trichomonads | Clue cells (epithelial cells studded with bacteria); few WBCs |
| Microscopy (KOH) | Pseudohyphae/buds | — | — |
| Inflammation | Vaginal erythema, vulvar edema, fissures | Erythema; "strawberry cervix" (punctate hemorrhages) | None (BV = no inflammation) |
| WBCs in discharge | Absent | Present | Absent |
| Nugent score | — | — | ≥7 = BV on Gram stain |
| Special test | Culture for non-albicans | NAAT (gold std.); culture 95% sensitive | Amsel criteria (≥3 of 4) |
AMSEL CRITERIA FOR BACTERIAL VAGINOSIS
(Diagnosis requires ≥3 of 4)
- Homogeneous, thin, white/gray discharge coating vaginal walls
- Clue cells on saline wet prep (vaginal epithelial cells covered with bacteria, obscuring cell borders)
- Vaginal pH >4.5
- Positive whiff test — fishy amine odor on addition of 10% KOH
Gold standard = Gram stain (Nugent score ≥7)
CLINICAL FEATURES IN DETAIL
1. Candidal Vulvovaginitis
- Most common mucocutaneous Candida infection
- Risk factors: pregnancy, OCPs (↑ estrogen), diabetes, corticosteroids, broad-spectrum antibiotics, HIV/immunosuppression
- Exam: labia erythematous + swollen; vaginal walls show erythema + white plaques; satellite lesions characteristic
- Recurrent VVC (RVVC): ≥4 episodes/year; usually no identifiable risk factor → presumed local immune dysregulation; C. glabrata species resistant to azoles
2. Trichomonas Vaginitis
- STI in both sexes; men often asymptomatic
- Incubation: 5–28 days; untreated = persists months–years
- Classic: frothy, greenish, malodorous discharge + strawberry cervix
- Increases risk of HIV acquisition and transmission (disrupts protective Lactobacillus)
- Associated with premature rupture of membranes, preterm labor
- Diagnosis: motile trichomonads on wet prep (sensitivity ~60–70%), NAAT (most sensitive and specific, FDA-approved)
3. Bacterial Vaginosis
- NOT an infection — a polymicrobial syndrome (replacement of Lactobacillus with anaerobes)
- Most women are asymptomatic; main complaint is fishy odor, especially after intercourse or menses (semen is alkaline → releases amines)
- No vaginal inflammation (distinguishes from other types)
- Complications: PID, post-surgical pelvic infections, preterm labor, PPROM, ↑ HIV transmission, ↑ STI risk
PREPUBERTAL VULVOVAGINITIS
Most common gynecologic disorder in prepubertal girls.
Predisposing factors: low estrogen → thin epithelium, short vagina-anus distance, poor hygiene, chemical irritants (bubble bath)
Organisms: H. influenzae, Group A Streptococcus, S. aureus, S. pneumoniae, E. coli, Shigella, N. gonorrhoeae, Chlamydia, Candida, pinworms
Always consider sexual abuse in prepubertal girls with STI-associated organisms
ATROPHIC VAGINITIS
- Affects 10–40% of postmenopausal women
- Low estrogen → epithelial thinning → altered pH → coliforms overgrow, Lactobacillus disappears
- Wet prep: RBCs, PMNs, small round immature squamous cells (parabasal cells)
- Candida and Trichomonas rare in postmenopausal women unless on estrogen replacement
- Treatment: topical vaginal estrogen (cream, pessary, ring, tablet) — all equally effective
DIAGNOSTIC APPROACH
History: discharge character, odor, pruritus, dysuria, dyspareunia, new sexual partners, antibiotic use, hygiene practices, OCP use, pregnancy
Examination: vulvar edema/erythema, discharge at introitus (BV/Trich) vs. vaginal plaques (Candida); speculum exam; bimanual exam
Office tests:
- pH — single most useful screen
- Saline wet prep — clue cells (BV), motile trichomonads (Trich)
- KOH prep — pseudohyphae (Candida), whiff test (BV)
- NAAT — for T. vaginalis, N. gonorrhoeae, C. trachomatis (all sexually active women)
- Culture — for non-albicans Candida (when azole treatment fails)
TREATMENT SUMMARY
Bacterial Vaginosis
| Regimen | Details |
|---|---|
| Metronidazole 500 mg PO BID × 7 days | First-line |
| Metronidazole gel 0.75%, 5 g intravaginally × 5 days | Alternative |
| Clindamycin cream 2%, 5 g intravaginally × 7 days | Alternative (weakens latex condoms for 5 days) |
- Routine treatment of sex partners not recommended
- Avoid alcohol during metronidazole therapy (disulfiram-like reaction)
Vulvovaginal Candidiasis (Uncomplicated)
| Regimen | Details |
|---|---|
| Fluconazole 150 mg PO single dose | Most convenient; equally effective as topical |
| Topical azoles (miconazole, clotrimazole) | Available OTC; 1-, 3-, or 7-day regimens |
- Sexual partners treated only if symptomatic
Complicated/Recurrent VVC:
- Topical azole × 7–14 days, or
- Fluconazole 150 mg on days 1, 4, and 7 (3 doses)
- C. glabrata: azoles ineffective → use intravaginal boric acid or nystatin
Trichomoniasis
| Regimen | Details |
|---|---|
| Metronidazole 2 g PO single dose | First-line |
| Tinidazole 2 g PO single dose | Alternative (better tolerated) |
| Metronidazole 500 mg PO BID × 7 days | For treatment failure |
- Treat sexual partners (BV does not require this, but Trich does — STI)
- Retest after 3 months (high reinfection rate)
Atrophic Vaginitis
- Topical vaginal estrogen (cream/ring/tablet/pessary)
- Contraindicated in history of reproductive tract cancers
- Any postmenopausal bleeding → refer to gynecology to rule out carcinoma
COMPLICATIONS & SEQUELAE
| Condition | Associated Complication |
|---|---|
| BV | Preterm labor, PPROM, PID, post-surgical infection, ↑ HIV transmission |
| Trichomoniasis | Preterm labor, PPROM, ↑ HIV acquisition/transmission |
| Candidiasis | Recurrent disease (RVVC); marker of diabetes/HIV |
| Any vaginitis | ↑ STI susceptibility; toxic shock syndrome can present with vaginitis |
HIGH-YIELD MNEMONICS
"BCC" for BV Amsel criteria: Big pH (>4.5), Clue cells, Clinging discharge + Whiff
pH Rule: Candida = low pH (≤4.5) | BV & Trich = high pH (>4.5)
WBCs: Present in Trich; Absent in BV (key differentiator)
Treat partner: Trich = YES | BV = NO | Candida = only if symptomatic
Strawberry cervix = Trichomonas (colpitis macularis)
Sources: Harrison's Principles of Internal Medicine 22E; Tintinalli's Emergency Medicine; Goldman-Cecil Medicine; Campbell-Walsh Wein Urology — textbook library
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