vaginitis cervicitis

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vaginitis bacterial vaginosis clue cells wet mount

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cervicitis mucopurulent discharge cervix

This is a Pap smear cytology image acquired by brightfield light microscopy from the cervix illustrating herpes simplex virus (HSV) infection of cervical squamous epithelium. The focal region shows enlarged squamous cells containing dense eosinophilic intranuclear inclusion bodies with a surrounding clear halo. The chromatin is marginated and peripheral, with pronounced nuclear molding and occasional multinucleation. The virus-induced cytopathic effect yields a characteristic ground-glass nucleus appearance and a perinuclear halo that highlights the inclusion bodies. The cytoplasm is variably basophilic to bluish with keratinized or non-keratinizing squamous differentiation, consistent with Pap-stained cytology. The image demonstrates the classic HSV cytopathic changes, in contrast to cytomegalovirus (owl’s eye) inclusions, which would typically be larger and show distinct perinuclear zones. These features facilitate rapid presumptive diagnosis of HSV cervicitis in a cytology setting, particularly when correlated with clinical symptoms such as genital vesicles or cervicitis with mucopurulent discharge. Confirmation by molecular methods (HSV DNA PCR), viral culture, or direct fluorescent antibody testing can enhance diagnostic accuracy. Clinically, HSV cervicitis is important due to implications for antiviral therapy, sexual health counseling, and consideration of vertical transmission risk in pregnancy. This photomicrograph serves as an educational reference for medical students and cytotechnologists assessing cervicitis cytopathology.

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I have very comprehensive data from Harrison's 22E (2025), Goldman-Cecil, Tintinalli's, and Robbins Pathology. Now let me compose the full, well-organized answer.

Vaginitis and Cervicitis

VAGINITIS

Vaginitis is inflammation of the vaginal mucosa, almost always presenting with vaginal discharge (leukorrhea), odor, pruritus, or irritation. The three most common infectious causes are bacterial vaginosis (BV), vulvovaginal candidiasis (VVC), and trichomoniasis. Normal vaginal flora is dominated by lactobacilli, which maintain a low pH (~3.8-4.5) that protects against pathogens.

1. Bacterial Vaginosis (BV)

Pathogenesis: BV is not a true infection but a polymicrobial disruption of normal flora. The lactobacillus-dominant flora is replaced by anaerobes - primarily Gardnerella vaginalis, Bacteroides spp., Mobiluncus, and Mycoplasma hominis. The loss of lactobacilli raises vaginal pH above 4.5.

Clinical features:

Thin, homogeneous, gray-white, malodorous ("fishy") discharge
Odor worse after unprotected intercourse (alkaline semen volatilizes amines)
Usually no significant itching or burning
May be asymptomatic

Amsel's criteria (3 of 4 required):

Thin, homogeneous, gray-white discharge
Vaginal pH > 4.5
Positive whiff (amine) test - fishy odor with 10% KOH
Clue cells on wet mount (squamous epithelial cells coated with bacteria, obscuring cell margins)

Clue cells are the hallmark finding. The Nugent score (Gram stain) is the gold standard for research.

Treatment (Harrison's 22E):

First-line: Oral metronidazole 500 mg twice daily × 7 days
Alternatives: Intravaginal 2% clindamycin cream (5 g nightly × 7 nights), intravaginal 0.75% metronidazole gel (5 g twice daily × 5 days)
Single-dose oral: Secnidazole 2 g once; or tinidazole 2 g daily × 3 days
Other oral: Clindamycin 300 mg twice daily × 7 days
Recurrence is common; suppressive twice-weekly intravaginal metronidazole gel reduces recurrence
Lactobacillus crispatus CTV-05 (LACTIN-V) weekly vaginal administration reduces recurrent BV by ~one-third (RCT evidence)
BV in pregnancy increases risk of preterm delivery and spontaneous abortion; however, treatment has not consistently reduced adverse outcomes

2. Vulvovaginal Candidiasis (VVC)

Pathogenesis: Candida albicans accounts for 85-92% of cases. It is part of normal vaginal flora in ~20% of women; symptomatic infection requires a disruption of balance. Predisposing factors:

Systemic antibiotics (suppress competing lactobacilli)
Diabetes mellitus, pregnancy, oral contraceptive use (alter epithelial glycogen)
Immunosuppression, HIV
Tight synthetic undergarments

C. glabrata and C. tropicalis are non-albicans strains, often more resistant.

Classification:

Uncomplicated: Sporadic, mild-moderate, C. albicans, immunocompetent non-pregnant host
Complicated: Recurrent (≥4 episodes/year), severe, non-albicans species, or abnormal host (DM, pregnancy, immunosuppression)

Clinical features:

Vulvar pruritus - the most common and specific symptom
White, cottage cheese-like or thick curdy discharge adhering to vaginal walls (sometimes thin/watery)
Vulvar erythema, edema, fissures
External dysuria, dyspareunia
No odor (odor favors BV)
Vaginal pH is normal (3.8-4.5) - distinguishes from BV and trichomoniasis

Diagnosis:

Wet mount (KOH prep) shows yeast, pseudohyphae, or hyphae - sensitivity ~50%
A classic clinical presentation warrants treatment even if fungal elements are not seen
Culture for non-albicans species in refractory/recurrent cases

Treatment:

Uncomplicated: Single oral dose fluconazole 150 mg (preferred by many patients), or short-course intravaginal azole (clotrimazole 100 mg vaginal tablets twice daily × 3 days; miconazole 1200 mg vaginal suppository once)
OTC topicals: Clotrimazole 2% cream 5 g intravaginally × 3 days; miconazole 4% cream 5 g × 3 days
Rx topicals: Butoconazole 2% cream 5 g once; terconazole 0.8% cream 5 g × 3 days
Complicated/recurrent: Prolonged or maintenance oral fluconazole; otesoconazole 150 mg daily × 7 days then weekly × 11 weeks (newer option per Goldman-Cecil)
Treatment of sexual partners is NOT indicated - Goldman-Cecil Medicine
VVC is not classified as an STI, though it can be sexually transmitted

3. Trichomoniasis

Pathogenesis: Trichomonas vaginalis is a flagellated protozoan - the most common nonviral STI worldwide (estimated annual incidence exceeds gonorrhea and chlamydia combined - Harrison's 22E). It attaches to vaginal mucosa, causing local inflammation.

Clinical features:

Frothy, yellow-green, malodorous vaginal discharge (classic but not universal)
Vulvar pruritus and irritation
"Strawberry cervix" - punctate hemorrhages on the cervix (pathognomonic when present, but seen in only ~2% clinically and ~45% by colposcopy)
Symptoms within 5-28 days of exposure
Many infections are asymptomatic (especially in men)

Diagnosis:

Wet mount: motile trichomonads (pear-shaped flagellates) - only ~50-70% sensitive
NAAT (vaginal, endocervical, or urine specimens): highly sensitive and specific; preferred when available
Culture: 95% sensitive, gold standard but takes 2-5 days

Treatment:

First-line: Metronidazole 2 g orally as a single dose (preferred: lower cost, better adherence, fewer side effects)
Alternative: Tinidazole 2 g orally single dose
If single-dose fails: Metronidazole 500 mg twice daily × 7 days (resistance is quantitative, not qualitative)
Pregnancy: Metronidazole 500 mg twice daily × 7 days preferred in women; 2 g single dose in men
Partners must be treated simultaneously; abstain from sex until both are treated and asymptomatic
Avoid alcohol during treatment and 24 h (metronidazole) / 72 h (tinidazole) after - disulfiram-like reaction
Metronidazole gel is NOT effective for trichomoniasis
CDC resistance hotline: 414-718-4141

Complications of T. vaginalis: Preterm birth, low birth weight, PID, increased HIV transmission risk

4. Other/Less Common Causes

Type	Key Features	Treatment
Atrophic vaginitis	Postmenopausal or prolonged breastfeeding; decreased estrogen → thin, pale, dry epithelium; pH elevated	Topical or systemic estrogen replacement
Desquamative inflammatory vaginitis (DIV)	Neutrophils, parabasal cells, gram-positive cocci on smear	2% clindamycin cream ± topical steroid × several weeks
Toxic shock syndrome vaginitis	Staphylococcus aureus - Gram stain + culture of vaginal fluid	Antistaphylococcal antibiotics, supportive care
Allergic/contact vaginitis	Latex, spermicides, douches, antiseptics	Remove offending agent
Foreign body	Retained tampon, cervical cap - usually malodorous	Removal

Comparative Summary Table

Feature	Bacterial Vaginosis	VVC	Trichomoniasis
Discharge	Thin, gray-white, homogeneous	White, thick/curdy	Yellow-green, frothy
Odor	Fishy (amine)	None	Offensive
pH	>4.5	Normal (3.8-4.5)	>4.5
Pruritus	Minimal	Marked (hallmark)	Present
Wet mount	Clue cells	Hyphae/pseudohyphae (KOH)	Motile trichomonads
Whiff test	Positive	Negative	Variable
STI	No	No	Yes
Treatment	Metronidazole/clindamycin	Fluconazole/azole	Metronidazole/tinidazole

Jawetz Medical Microbiology 28E (Table 48-5)
Tintinalli's Emergency Medicine
Harrison's Principles of Internal Medicine 22E

CERVICITIS

Definition and Overview

Cervicitis is inflammation of the cervix - the most common manifestation of serious bacterial STIs in women. It can be:

Infectious (most clinically important)
Noninfectious (chemical, traumatic, physical)

Differentiation is difficult due to the presence of normal vaginal flora.

Etiology

Major pathogens (Robbins Pathology / Harrison's 22E):

Chlamydia trachomatis - most common (up to 40% of STI-clinic cases)
Neisseria gonorrhoeae
Mycoplasma genitalium (increasingly recognized)
Trichomonas vaginalis
HSV-2 - less common but important because of neonatal transmission risk
Ureaplasma urealyticum
HPV (certain types)
BV-associated bacteria may also cause a cervical inflammatory reaction

Nearly half of MPC cases have no identifiable microbial etiology even with NAAT testing.

Mucopurulent Cervicitis (MPC)

MPC is cervicitis of the columnar epithelium and subepithelium of the endocervix - the "silent partner" of urethritis in men.

Clinical features:

Often asymptomatic - discovered on routine pelvic examination
Abnormal vaginal discharge (mucopurulent or purulent)
Endocervical tenderness on bimanual examination
Yellow or green mucopus visible at the endocervical os
Easily induced endocervical bleeding (friable cervix)
≥10 PMNs per high-power field on endocervical Gram stain

Key clinical point: MPC can be a harbinger of PID. In pregnant women, MPC can cause obstetric complications.

Cervical ectopy ("cervical erosion") is commonly confused with infectious cervicitis - it represents columnar epithelium extending onto the ectocervix. Ectopy shows intact epithelium on colposcopy and contains clear or cloudy (not yellow) mucus. It is more susceptible to STI acquisition.

Diagnosis

NAAT of cervical or vaginal swab: gold standard for C. trachomatis, N. gonorrhoeae, M. genitalium, and T. vaginalis
Gram stain of endocervical discharge: ≥10 PMNs/HPF supports diagnosis
Pap smear may show inflammation; HSV cytopathic changes (multinucleation, ground-glass nuclei, intranuclear inclusions) are characteristic
Culture for gonorrhea when antibiotic sensitivities are needed

HSV cervicitis Pap smear - intranuclear inclusions and ground-glass nuclei in squamous cells

Treatment

Based on Goldman-Cecil Medicine and Harrison's 22E (2025):

Empiric treatment (when follow-up cannot be ensured, or high-risk population):

For Chlamydia: Doxycycline 100 mg orally twice daily × 7 days (preferred), or azithromycin 1 g orally single dose
For Gonorrhea (if prevalence is high or risk factors present): Ceftriaxone 500 mg IM once
For M. genitalium: Doxycycline 100 mg twice daily × 7 days followed by moxifloxacin 400 mg once daily × 7 days (M. genitalium often persists after doxycycline alone; azithromycin resistance is now recognized)

Targeted treatment (when NAAT results available):

Treat based on identified pathogen(s)
Treat partners with a similar regimen unless results warrant different therapy

Risk factors for empiric treatment:

Age < 25 years
New sexual partner
Sexual partner with an STI
Partners who have other partners
Follow-up cannot be assured

Complications of Untreated Cervicitis

Pelvic inflammatory disease (PID) - infection ascends to cause endometritis, salpingitis, tubo-ovarian abscess
Infertility due to tubal damage
Ectopic pregnancy
Chronic pelvic pain
Neonatal infection - HSV (potentially fatal), gonococcal ophthalmia, neonatal chlamydia (pneumonia, conjunctivitis)
HIV acquisition - cervical ectopy and inflammation increase HIV susceptibility

Pathology (Robbins & Kumar)

Cervicitis is extremely common and affects the cervical columnar epithelium. Histologically:

Acute cervicitis: neutrophilic infiltrate, edema, vascular congestion
Chronic cervicitis: lymphocytic/plasma cell infiltrate, may show squamous metaplasia
Herpetic cervicitis: intranuclear Cowdry type A inclusions, multinucleated giant cells
Treatment is usually empiric with antibiotics active against Chlamydia and Neisseria gonorrhoeae; NAATs on vaginal fluid can confirm organisms

Key Distinguishing Points: Vaginitis vs Cervicitis

Feature	Vaginitis	Cervicitis
Source of discharge	Vaginal walls	Endocervical glands
Main symptoms	Discharge, odor, pruritus	Often asymptomatic, purulent discharge
pH changes	Yes (BV, Trichomonas)	Not primary diagnostic tool
Main organisms	G. vaginalis, Candida, T. vaginalis	C. trachomatis, N. gonorrhoeae, M. genitalium
Clue cells	Yes (BV)	No
Risk of PID	Low directly	High - gateway to upper tract infection
STI classification	Only Trichomonas is STI	Almost always STI-associated

Sources:

Harrison's Principles of Internal Medicine 22E (2025), Chapter 141
Goldman-Cecil Medicine, Chapter 264
Robbins & Kumar Basic Pathology
Tintinalli's Emergency Medicine, Chapter 102

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