Genitourinary Medicine (GUM) Flashcards
What are the causes for vaginal discharge?
Physiological
Candida
Trichimonas vaginalis Bacterial vaginosis Gonorrhoea Chlamydia Ectropion Foreign body Cervical cancer
What type of discharge is seen in candida infections?
Curd like
Non-offensive
White
What type of discharge is seen in trichimonas?
Yellow, frothy, offensive
Strawberry cervix
What type of discharge is seen in bacterial vaginosis?
Thin
White/grey
Fishy
What type of discharge is seen in gonorrhoea?
Thin
Watery
Yellow
What type of discharge is seen in chlamydia?
Copious amounts of purulent yellow discharge
What type of discharge is seen in ectropion?
Increased amounts of normal discharge
What type of discharge may be seen with foreign bodies?
Foul smelling
+ blood
What type of discharge is seen in cervical cancer?
Persistent discharge which doesn’t respond to treatment
What are the main risk factors for STIs?
Age <25
Sexual partner positive
Recent change in sexual partner
Co-infection with another STI
Non-barrier contraception
How are STIs managed in general?
Abstain from sex until both treated
Offer screening for other STI’s
Encourage talking to previous partners
Talk about safe sex in future
What is bacterial vaginosis?
Not an STI
Normal vaginal flora disturbed leading to reduced lactobacilli
Other micro-organisms grow - Gardnerella Vaginalis, anaerobes and mycoplasmas
Why do you have a raised pH in bacterial vaginosis?
Lactobacilli produce hydrogen peroxide to maintain acidity
Reduced lactobacilli
What are the main risk factors for bacterial vaginosis?
Multiple sexual partners
Receptive oral sex
IUD Concurrent STI Vaginal douching or soaps Recent Abx use Smoking Copper coil
How does bacterial vaginosis present?
Offensive fishy discharge
Thin white/grey discharge
Not normally sore or itchy
Speculum examination can be performed to confirm with high vaginal swab
How is bacterial vaginosis diagnosed?
High vaginal swab for microscopy:
- Clue cells (vaginal epithelia studded with coccobacilli)
- Reduced lactobacilli
- Absence of pus cells
Vaginal pH >4.5 - 3.5-4.5
Positive whiff test - add alkali to discharge and strong fishy odour smelt
How is bacterial vaginosis managed?
Asymptomatic - dont need treating
Oral metronidazole - can be vaginal
Clindamycin second line
Advice regarding risk factors
Consider IUD removal
Assess the risk of chlamydia and gonorrhoea with swabs
What must be avoided during treatment with metronidazole?
Alcohol
Alcohol and metronidazole can cause a disulfarim like reaction with n+v, flushing and sometimes symptoms of shock or angioedema.
What is the recurrence rate of bacterial vaginosis and how is it managed?
> 50% in 3 months
Oral metronidazole
What is important to know about bacterial vaginosis in pregnancy?
Symptomatic BV can increase risks of premature birth, miscarriage and chorioamnionitis
Treat with metronidazole
What are the complications of bacterial vaginosis?
Can increase the risk of catching STIs, including chlamydia, gonorrhoea, HIV.
Complications in pregnant women Miscarriage Preterm delivery Preterm rupture of membranes Chorioamnionitis Low birth weight Postpartum endometritis
What is candidiasis?
Not an STI
Also called thrush
Overgrown of Candida albicans
What is the peak incidence of candidiasis?
20-40yo
What are the main risk factors for thrush?
Pregnancy
Diabetes
Recent abx use
Corticosteroid use
Immunocompromised
How does thrush present?
Vulval itching
White curd like discharge - non-offensive
Dysuria
On examination:
- erythematous vulva
- satellite lesions - red pustular lesions with superficial white pseudomembranous plaques that can be scraped off
Can have fissures, dyspareunia, excoriation, oedema
What are the investigations for thrush?
Often treatment is started empirically
Test vaginal pH using swab and pH paper to differentiate between BV and trichomonas and candidiasis pH <4.5
Charcoal swab with microscopy can confirm diagnosis
What are the management options for thrush?
Antifungal medications
Cream - clotrimazole inserted into the vagina with an applicator
Antifungal pessary - clotrimazole
Antifungal tablets - fluconazole
For initial uncomplicated cases options are:
Single dose of cream at night
Single dose of pessary at night
Three doses of pessaries over three nights
Single dose of oral fluconazole
Canesten Duo available over the counter containing single fluconazole tablet and clotrimazole cream
Antifungal creams and pessaries can damage latex condoms
Alternative contraception needed 5 days after use
What should you do if thrush management fails?
Measure vaginal pH (<4.5 in thrush) and swab for microscopy
Address risk factors
Treat for longer period
Why is thrush more likely in pregnancy? How is it managed?
Oestrogen levels - increased glycogen create favourable environment. Promote growth and sticks it to walls
Treat with intravaginal not oral meds
What organism causes chlamydia and how long is the incubation period?
Chlamydia trachomatis
Intracellular gram -ve cocci/rod shaped
7-21 day incubation
How is chlamydia transmitted?
Vaginal, oral or anal sex
Skin-skin genital contact
Can infect eye, pharynx and rectum
How does chlamydia present in women?
70% asymptomatic
Cervicitis - discharge and bleeding
Dysuria
Pelvic pain
Cervical excitation
Painful urination and sex
Consider rectal chlamydia and lymphogranuloma venereum in patients presenting with anorectal symptoms e.g. discomfort, discharge, bleeding or change in bowel habits after anal sex.
How does chlamydia present in males?
50% asymptomatic
Dysuria
Discharge
Urethral discomfort
Testicular pain
Reactive arthritis
Consider rectal chlamydia and lymphogranuloma venereum in patients presenting with anorectal symptoms e.g. discomfort, discharge, bleeding or change in bowel habits after anal sex.
How is chlamydia investigated?
NAAT technique on:
Vulvo-vaginal swab
First void urine
What swabs are used in sexual health testing?
Charcoal swabs
Nucleic acid amplification test
Charcoal swabs allow for microscopy, culture and sensitivities.
Allows for gram staining for endocervical swabs and high vaginal swabs - confirms BV, candidiasis, gonorrhoea, trichomonas, GBS
NAAT checks DNA or RNA of organism, used specifically for chlamydia and gonorrhoea. Vulvovaginal swab (self taken) endocervical swab or first catch urine. In men, first catch or urethral swab.
Rectal or oral NAAT swabs for chlamydia in rectum or mouth.
If gonorrhoea on NAAT, then endocervical charcoal swab for MCS.
What are the examination findings in chlamydia?
Pelvic or abdominal tenderness
Cervical motion tenderness - cervical excitation
Inflamed cervix - cervicitis
Purulent discharge
How is chlamydia diagnosed?
NAAT
Nucleic acid amplification tests
Vulvovaginal swab Endocervical swab First catch urine sample Urethral swab in men Rectal swab - after anal sex Pharyngeal swab after oral sex
What is the management of chlamydia?
First line for uncomplicated - doxycycline 100mg twice a day for 7 days
Erythromycin if CI
When is doxycycline contraindicated in treatment for chlamydia?
In pregnancy and breastfeeding
Alternatives include
Azithromycin 1mg stat, then 500mg once a day for 2 days
Erythromycin 500mg four times daily for 7 days
Erythromycin 500mg twice daily for 14 days
Amoxicillin 500mg three times daily for 7 days
What are important factors to consider during the treatment of chlamydia?
Test of cure not usually routinely recommended.
Abstain from sex for seven days of treatment of all partners
refer to GUM for contact Tracing and notification of sexual partners
Test for and treat any other sexually transmitted infections
Provide advice about how to prevent future infections
Consider safeguarding and sexual abuse in young people
What are the complications of chlamydia?
Pelvic inflammatory disease Chronic pelvic pain Infertility Ectopic pregnancy Epididymo-orchitis Conjunctivitis Lymphogranuloma venereum Reactive arthritis
What are the pregnancy related complications of chlamydia?
Preterm delivery Premature rupture of membranes Low birth weight Postpartum endometritis Neonatal infection - conjunctivitis and pneumonia
What is lymphogranuloma venereum?
Condition affecting the lymphoid tissue around the site of infection with chlamydia.
Primary stage - painless ulcer, primary lesion - on penis in men, vaginal wall or rectum.
Secondary stage - lymphadenitis; swelling, inflammation and pain in lymph nodes infected with bacteria - inguinal or femoral lymph nodes.
Tertiary - inflammation of the rectum and anus, proctitis leads to anal pain, changes in bowel habits, tenesmus.
What is the treatment of lymphogranuloma venereum?
Doxycycline 100mg twice daily for 21 days
Erythromycin or azithromycin are second line options
What is chlamydial conjunctivitis?
When genital fluid comes into contact with the eye e.g. hand to eye spread.
Presents with chronic erythema, irritation and discharge lasting more than two weeks.
What organism causes gonorrhoea? how long is the incubation period?
Neisseria gonorrhoea - gram -ve cocci
2-5 day incubation
How is gonorrhoea transmitted?
Vaginal, oral or anal sex
Vertical transmission - mother to child
Can infect rectum and pharynx