Leucorrhea definition causes clinical features management
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vaginal discharge vaginitis management
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Leucorrhea (Leukorrhea)
Definition
Leucorrhea is a white or whitish vaginal discharge that may be physiological or pathological. The term literally means "white flow" (leuco = white, rrhea = flow). It refers to any non-bloody vaginal discharge, ranging from the normal clear/white secretions of the healthy vaginal ecosystem to the abnormal discharges caused by infection or inflammation.
- Physiological leucorrhea: Normal discharge that is clear or white, heterogeneous in consistency, usually scant, with no associated vulvar/vaginal inflammation, vaginal pH <4.5, and microscopy showing normal epithelial cells with Lactobacillus predominating. No treatment needed.
- Pathological leucorrhea: Discharge associated with infection, altered flora, cervical disease, or systemic conditions.
Causes
Physiological Causes
| Situation | Mechanism |
|---|---|
| Neonatal period | Residual maternal estrogen stimulation (thin, clear/white discharge in first 2-3 weeks of life) |
| Puberty / adolescence | Rising estrogen levels increase vaginal secretions |
| Ovulation | Mid-cycle cervical mucus (egg-white, stretchy) |
| Pregnancy | Increased vascularity and estrogen effect |
| Sexual arousal | Transudation from vaginal walls |
| Oral contraceptive use | Estrogen-driven glandular stimulation |
Pathological Causes
Vaginal Infections (Vaginitis)
- Bacterial Vaginosis (BV) - most common cause in reproductive-age women
- Replacement of normal Lactobacillus flora by a polymicrobial group: Gardnerella vaginalis, Prevotella, Mobiluncus, Mycoplasma hominis, anaerobes
- Vulvovaginal Candidiasis (VVC)
- Caused by Candida albicans (75%+ of cases); also other Candida species
- Trichomoniasis
- Trichomonas vaginalis - sexually transmitted protozoan
Cervical Infections (Cervicitis)
- Neisseria gonorrhoeae, Chlamydia trachomatis, Trichomonas vaginalis, Herpes simplex virus
Non-infectious Causes
- Vaginal foreign body (especially in prepubertal girls - most common: toilet paper)
- Cervical erosion/ectopy
- Cervical polyp or malignancy
- Atrophic vaginitis (post-menopausal)
- Pelvic inflammatory disease (PID)
- Chemical irritants (douches, perfumed soaps, bubble baths, tight underwear)
- Allergic/contact vulvovaginitis
- Poor perineal hygiene
Systemic Predisposing Factors
- Diabetes mellitus (predisposes to candidiasis)
- Pregnancy
- HIV/immunocompromise
- Broad-spectrum antibiotic use (disrupts Lactobacillus flora)
Clinical Features
The character of the discharge is the key distinguishing feature:
| Feature | Physiological | BV | Trichomoniasis | VVC |
|---|---|---|---|---|
| Amount | Variable, scant | Moderate | Profuse | Scant to moderate |
| Color | Clear / white | White or gray | Yellow-green | White |
| Consistency | Heterogeneous | Homogeneous, low viscosity (milk-like) | Homogeneous, frothy | Clumped, adherent plaques ("curdy") |
| Odor | None | Fishy (positive whiff test) | May be fishy | None |
| Vulvar inflammation | No | No | Yes | Yes |
| Pruritus | No | No | Yes | Prominent |
| pH | <4.5 | >4.5 | >5.0 | <4.5 |
| Microscopy | Normal epithelial cells, Lactobacillus | Clue cells, few WBCs | Motile trichomonads, many WBCs | Budding yeast/pseudohyphae |
Symptoms to Ask About (History)
- Menstrual history (rule out pregnancy)
- Nature of discharge: amount, color, consistency, smell
- Genital itching and burning
- Dysuria or increased urinary frequency
- Presence of ulcers or inguinal swelling
- Complaints in sexual partner
- Low backache (suggests PID)
- (Park's Textbook of Preventive and Social Medicine)
Examination Findings
- Per speculum examination to differentiate vaginitis vs. cervicitis:
- Trichomoniasis: greenish, frothy discharge; "strawberry cervix" (petechial hemorrhages on cervix, best seen on colposcopy)
- Candidiasis: curdy white adherent discharge, vulvar erythema, satellite lesions
- BV: thin homogeneous adherent discharge
- Cervicitis: mucopurulent cervical discharge, cervical erosion/ulcer
- Bimanual pelvic examination: to rule out PID (uterine/adnexal tenderness)
Investigations
| Test | Purpose |
|---|---|
| Vaginal pH | <4.5 = normal/candida; >4.5 = BV/trichomonas |
| Wet mount (saline) | Clue cells (BV), motile trichomonads (TV) |
| 10% KOH preparation | Budding yeast/pseudohyphae (Candida); positive whiff/amine test (BV) |
| Gram stain (vaginal smear) | Clue cells in BV; gram-negative diplococci for gonorrhea |
| Gram stain (endocervical smear) | Intracellular gonococci |
| NAAT (Nucleic Acid Amplification Test) | Gold standard for C. trachomatis, N. gonorrhoeae, T. vaginalis (more sensitive than culture) |
| Fungal culture | Gold standard for VVC, rarely performed |
Amsel Criteria for BV (at least 3 of 4 required):
- Homogeneous, thin, grayish-white discharge
- Vaginal pH >4.5
- Positive whiff-amine test (fishy odor with 10% KOH)
- Clue cells on wet mount
- (Harriet Lane Handbook, 23rd ed.)
Management
General Principles
- Syndromic management (treat without lab confirmation) is acceptable in resource-limited settings
- Partner notification and treatment for sexually transmitted infections (especially trichomoniasis and gonorrhea/chlamydia)
- Patient education: avoid douching, maintain hygiene, use appropriate underwear
Specific Treatment
1. Bacterial Vaginosis
- Metronidazole 500 mg orally twice daily for 7 days (preferred)
- OR Metronidazole gel 0.75%, 5 g intravaginally once daily for 5 days
- OR Clindamycin cream 2%, 5 g intravaginally at bedtime for 7 days
- Treatment of male sex partners is not beneficial
- BV increases risk of PID, preterm labour, and acquisition of HIV/STIs
- (Rosen's Emergency Medicine; Harrison's Principles, 22nd ed.)
2. Vulvovaginal Candidiasis
- Uncomplicated (non-pregnant): Fluconazole 150 mg orally single dose (80-90% cure rate)
- Topical alternatives: Clotrimazole, miconazole, butoconazole, terconazole, tioconazole (OTC available)
- Pregnancy: Fluconazole is contraindicated; use 7-day topical azole course (clotrimazole vaginal pessary/cream)
- Non-albicans VVC: non-fluconazole azoles (clotrimazole, miconazole, itraconazole) per CDC
- (Rosen's Emergency Medicine; Park's PSM)
3. Trichomoniasis
- Metronidazole 500 mg orally twice daily for 7 days (preferred over single-dose)
- OR Tinidazole (longer half-life, fewer GI side effects; useful for metronidazole-resistant cases)
- Partner treatment is mandatory (prevents reinfection); treat simultaneously
- Intravaginal metronidazole gel is not reliable for trichomoniasis - systemic treatment required
- NAAT is more sensitive than wet mount for detection
- (Harrison's Principles, 22nd ed.)
4. Cervicitis (Gonorrhea + Chlamydia)
- Cefixime 400 mg orally, single dose (for gonorrhea)
- PLUS Azithromycin 1 g orally, single dose (for chlamydia)
- Note: Most chlamydial and gonococcal cervical infections are asymptomatic
Syndromic Management (WHO / Park's Approach)
When laboratory tests are unavailable or speculum examination is not possible, treat empirically:
Vaginitis (TV + BV + Candida):
- Secnidazole 2 g orally single dose OR Tinidazole 500 mg twice daily for 5 days (cover TV + BV)
- PLUS Fluconazole 150 mg orally single dose (cover Candida)
- Metoclopramide 30 min before Secnidazole to prevent gastric intolerance
If cervicitis is also present, add:
- Cefixime 400 mg + Azithromycin 1 g
Management in Pregnancy
| Condition | Treatment |
|---|---|
| Candidiasis (1st trimester) | Clotrimazole vaginal pessary/cream only; oral fluconazole contraindicated |
| Candidiasis (2nd/3rd trimester) | Clotrimazole pessary OR cream |
| BV / Trichomoniasis | Metronidazole intravaginally (pessaries/cream); oral metronidazole is generally considered safe after 1st trimester |
| Per speculum always done | To rule out abortion, PPROM |
| Concurrent DM, HIV | Consider these factors in recurrent infections |
Follow-up: Review after 1 week to confirm response.
Management in Prepubertal Girls
- Consider sexual abuse if an STI-causing organism is isolated
- Non-specific vulvovaginitis: focus on hygiene (proper wiping front-to-back, avoid irritants/bubble baths, loose underwear); topical estrogen + broad-spectrum antibiotics short course if needed
- Foreign body (most common = toilet paper): remove with forceps or vaginal lavage; may need sedation
- (Berek & Novak's Gynecology; Tintinalli's Emergency Medicine)
Sources: Harrison's Principles of Internal Medicine 22E; Rosen's Emergency Medicine; Park's Textbook of Preventive and Social Medicine; Harriet Lane Handbook, 23rd ed.; Berek & Novak's Gynecology; Tintinalli's Emergency Medicine
Create a clinical decision tree PDF for vaginal discharge diagnosis and management
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Your PDF is ready:
Vaginal Discharge Decision Tree
PDF Document · PDF
What's inside (2 pages, A3 landscape):
Page 1 - Full Clinical Decision Tree
- Start node: "Patient with vaginal discharge"
- Central decision diamond: Assess character of discharge
- 5 colour-coded branches fanning out:
- Green - Physiological leucorrhea
- Orange - Vulvovaginal Candidiasis (VVC)
- Purple - Bacterial Vaginosis (BV)
- Red - Trichomoniasis
- Teal - Cervicitis (GC/Chlamydia)
- Each branch flows down through: Clinical suspicion → Investigations → Treatment
- Footer bars for follow-up rules, pregnancy, and prepubertal girls
Page 2 - Syndromic Management + Comparison Table
- WHO 5-step syndromic flow (for resource-limited settings) with pregnancy-specific modifications
- Full diagnostic comparison table: colour, consistency, pH, odour, microscopy, and treatment for all 4 conditions
- Amsel Criteria box for BV diagnosis (≥3 of 4 required)
Sources: Harrison's 22E, Rosen's Emergency Medicine, Park's PSM, Harriet Lane 23E, Berek & Novak's Gynecology.
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