GU + Sexual health Flashcards
Bacterial vaginosis
The overgrowth of ANAEROBIC bacteria in the vagina, caused by the LOSS of LACTOBACILLI.
NOT AN STI but is a RFx for STIs - can occur alongside other infections
Role of lactobacilli in healthy vagina
Produce LACTIC ACID - keeps vagina ACIDIC (<4.5)
When reduced numbers of lactobacilli - becomes ALKALINE allowing ANAEROBIC bacteria to multiply
Examples of anaerobic bacteria associated with bacterial vaginosis
- Gardnerella vaginalis (most common)
- Mycoplasma hominis
- Prevotella species
RFx for bacterial vaginosis
- Multiple sexual partners
- Excessive cleaning of vagina
- Recent antibiotics
- Copper coil
- SMOKING
Less common if on combined pill/using condoms
Sx of bacterial vaginosis
Strong fishy odour of watery grey/white discharge
- the discharge is homogenous + coating the walls of vagina + vestibule
(50% asymp; itching/irritatiion or pain = suggests other cause)
Bacterial vaginosis investigations
- speculum examination to check discharge (not always required if v typical/low risk of STI)
- VAGINAL SWAB:
- pH paper shows >4.5
- CHARCOAL SWAB for MICROSCOPY
- CLUE CELLS on microscopy (epithelial cells so covered in bacteria their edges are grainy)
Bacterial vaginosis management
Asymp = none; generally can self resolve
-
METRONIDAZOLE (only works on ANAEROBIC) - ORAL or VAGINAL GEL
- 2nd: Clindamyicin
- Swab for STIs + assess risk of other pelvic infection
- Give advice/info
- Don’t drink while on metranidazole
Can prevent with ACIDIFIED VAGINAL GEL
Complications of Bacterial vaginosis
- Risk of catching STIs
- Miscarriage
- Preterm delivery
- Premature rupture of membranes
- Chorioamnionitis
- Low birth weight
- Postpartum endometritis
Balanitis
Inflammation of the glans penis
Balanitis Sx
- Inflamed (red, swollen, itchy, sore)
- Dysuria
- Discharge from under foreskin/bleeding
- Difficulty pulling back foreskin (may be normal in children)
- Odour
Investigation of balanitis
- Clinical presentation
- charcoal swab for microscopy if infection suspected (or first catch urine)
- biopsy if extensive skin change / scarring
May do blood tests if severe: Blood glucose??
Balanitis Tx
Core treatment:
- Saline washes
- Ensuring to clean properly under foreskin
- 1% hydrocortisone if more severe irritation - for a SHORT TIME
Depends on cause:
- Steroid cream
- Mild = dermatitis, circinate balanitis (reative arthritis)
- High potency = lichen sclerosus
- Antifungal cream
- topical CLOTRIMAZOLE
- Antibiotics
- oft oral FLUCLOX / clarithro (as staph and strep B are most common bacterial causes)
- Metronidazole if anaerobic bacteria
May remove foreskin if recurrent (or for lichen sclerosus)
Causes of balanitis
- not washing
- irritation from soaps/condoms
- DIABETES -> THRUSH
- STI including TRICHOMONAS VAGINALIS
Thrichomoniasis
STI caused by Trichomonas vaginalis (flagellate protozoa)
- in urethra (male/female) and vagina
Thrichomoniasis presentation
50% asymp
- Vaginal discharge (typical = frothy yellow green but can vary; may smell fishy)
- Itching
- Dysuria
- Dyspareunia (painful sex)
- Balanitis
Strawberry cervix from inflam + multiple tiny haemorrhaeges (on examinarion) AND ACIDIC pH
Trichomoniasis Dx
- CHARCOAL SWAB + MICROSCOPY
- ideally from POSTERIOR FORNIX (behind cervix) but self taken works too
- urethral swab or first-catch urine in men
Trichomoniasis Mx
- Refer to GUM
- CONTACT TRACING
- METRONIDAZOLE
Trochomoniasis complication
Increases risk of:
- Contracting HIV by damaging the vaginal mucosa
- Bacterial vaginosis
- Cervical cancer
- Pelvic inflammatory disease
- Pregnancy-related complications such as preterm delivery
Herpes simplex virus (HSV)
- HSV-1 = typically cold sores
- HSV-2 = typically genital herpes
Can also cause apthous ulcer, herpes keratitis (eye inflam), herpetic whitlow (painful lesion on fingers)
Both common in UK
Oft asymp - spread through mucous membranes/secretions
HSV goes dormant in the associated sensory nerve gangioln. Which are these usually?
- Trigeminal nerve ganglion - HSV1
- Sacral nerve ganglion - HSV2
Genital herpes Sx
Typically ~2weeks after contracting + lasting 3 weeks (most intense) - any proceeding reactivation usually milder/shorter
- Ulcers/blisters
- Neuropathic pain
- FLU-LIKE (fatigue, headache)
- DYSURIA
- INGUINAL LYMPHADENOPATHY
Genital herpes Dx
Contact trace (including ask about cold sores)
Clinical diagnosis
- Confirm with VIRAL PCR
Genital herpes Tx
- Refer to GUM
ACICLOVIR (regeime depends)
Additional measures, including to manage the symptoms include:
- Paracetamol
- Topical lidocaine 2% gel (e.g. Instillagel)
- Cleaning with warm salt water
- Topical vaseline
- Additional oral fluids
- Wear loose clothing
- Avoid intercourse with symptoms
Genital herpes complication
Vertical transmission via lesions during delivery of baby
- low risk if recurrent
- if primary give prophylactic ACICLOVIR even after initial course finished
- if contracted before 28 wks - might still consider vaginal delivery if asymp; after 28 wks do C-section
Chancroid
STI caused by FASTIDIOUS, GRAM -VE COCCOBACBILLI, Haemophilus ducreyi
Typically in resource-poor countries
OFT CO-FACTOR IN HIV transmission
Chancroid RFx
- Multiple sexual partners/contacts with sex workers
- Unprotected sex
- SUBSTANCE ABUSE (HIGH RISK BEHAVIOUR esp for things like crack cocaine)
- MALES
- Lack of circumcision
- Poor hygine
Chancroid Sx
- GENITAL PAPULES ( Early stage)
- GENITAL ULCERS (later)
- sharply defined, undermined, irregular border
- Lymphadenitis/buboes - usually UNILATERL (+ painful)
Typical STI Sx: discharge, pain
Sometimes rectal pain/bleeding +/- rectovaginal fistula
Chancroid Dx
- Clinical + charcoal swab -> MS+C
- Bloods - serology +/- antigen testing if available
- Ulcer biopsy
Rule out other STIs + TEST FOR HIV (serum ELISA)
Chancroid Tx
ANTIBIOTICS:
- Azithromycin or Ceftriaxone
- CIPROFLOXACIN or ERYTHROMYCIN if HIV +ve
- Don’t give Ciprofloxacin if PREG
Lymph node aspiration +/- incision + drainage (as needed)
Genital warts
Common STI caused by HPV (usually 6 + 11)
- Esp in 16 - 25 y/o
Genital warts RFx
- Intercourse from earlier age + more lifetime partner
- Immunocompromise
Genital warts Sx
Oft asymp
Usual stuff: itching, pain, bleeding
Can get haematuria/abnormal stream if inside urethra
Genital warts Dx
Clinical
Can biopsy if severe/not responding to treatment - check for dysplasia
ano/urethroscopy as required
Genital warts Tx
- Topical posophyllotoxin (SE: irritant) - not recommended if preg
- Cryotherapy, surgical excision, Tricholoro/bichloroacetic acid (high recurrance)
National Chlamydia Screening Programme
Tests every sexually active person under 25 y/o annually over with every new sexual partner
Re-test 3 months after treatment (if +ve) to ensure no re-infection
What is commonly tested at an STI screening
- Chlamydia + Gonorrhoea (NAAT (swab, urine or urethral) + charcoal for both)
- Syphilis (blood test)
- HIV (blood test)
- swabs from any ulcers
What types of tests are used for STI testing
- Charcoal swabs (in Amies transport medium) -> MS+C
- Nucleic Acid Amplification Test (NAAT)
- specifically for Chlamydia + Gonorrhoea (+ mycoplasma genitalium)
- endocervical swab is gold but can self-swab/first catch urine
Can also be an pharyngeal or rectal swab