Sexually Transmitted Infections Flashcards
Women presents with post coital bleeding, lower abdominal pain and dyspareunia (painful sexual intercourse). What is she describing symptoms of?
Chlamydia infection
A man presents with clear urethral discharge, dysuria and urethritis. What is he describing symptoms of?
What other symptoms could they experience?
Chlamydia infection
proctitis
epididymis-orchitis (inflammation of the epididymis +/- tescticle)
What %’age of women develop PID after infection with chlamydia trachomatis?
~9%
What are the complications of PID?
Increased risk of ectopic pregnancy
tubal damage/infertility
conjunctivitis
transmission to neonate (conjunctivitis 17%, pneumonia 20%)
Sexually acquired restive arthritis (SARA/reiter’s syndrome)
perihepatitis
What is Fitz-Hugh-Curtis Syndrome?
perihepatitis
complication of PID involving the liver capsule inflammation that leads to the creation of adhesions
What is the most commonly reported bacterial STI?
Chlamydia
What %’age of women/men are infected with chlamydia but experience no symptoms?
70-80 women
50 men
What is the incubation period of chlamydia trachomatis?
14 days
How do we test for chlamydia?
women: vulvovaginal swab
men: first void urine
MSM: rectal swab if having receptive anal sex
What is the 1st line tx for Chlamydia?
doxycycline 100mg BD for 1 week
What is the 2nd line tx for Chlamydia?
Azithromycin 1G stat followed by 500mg daily for 2 days
When is it safe to have sexual intercourse again?
After completion of doxycycline or 7 days after azithromycin
Describe the structure of Chlamydia trachomatis
Gram negative intracellular coccus
Describe the structure of Gonorrhoea
Gram negative intracellular diplococcus
What are the primary sites of infection in Gonorrhoea?
Mucous membranes, i.e. urethra endocervix rectum pharynx
What is the incubation period of gonorrhoea?
2-5 days
__% risk of a woman transferring to her male partner
__% risk of a male infecting his female partner (gonorrhoea)
20%
50-90%
Describe the presentation of gonorrhoea in a male
10% asymptomatic
>80% have green tinged urethral discharge
dysuria
pharyngeal/rectal infections are usually asymptomatic
Describe the presentation of gonorrhoea in a female
up to 50% asymptomatic
increased/altered vaginal discharge (~40%)
dysuria
pelvic pain <5%
again: pharyngeal/rectal infections are usually asymptomatic
How do we make a diagnosis of gonorrhoea?
screening: NAAT test (96% sensitivity) done with swab
microscopy (symptomatic)
- urethral swab
- endocervical swab
What is the 1st line tx for non-complicated gonorrhoea?
Ceftriaxone 500mg IM
What is the 2nd line tx for non-complicated gonorrhoea?
Ceftixime 400mg orally + 2mg azithromycin
Person diagnosed with gonorrhoea can have sexual intercourse again when?
After ceftriaxone injection or 7 days after ceftixime and azithromycin
Patient presents with thick, cottage cheese like discharge with a yellowish colour. The discharge started 2 days ago, no Hx of blood in the discharge, but has dysuria. No pain on examination and no masses. What is the likely diagnosis?
Candida albicans
Tx: antifungal
A 37 y/o woman of 35 weeks gestation presents at her GP clinic with a Hx of primary infection of genital herpes at 24 weeks (tx with acyclovir). She is wanting to discuss birth and management plans. What do you recommend
Aciclovir from 36 weeks (three times daily) and expectant delivery
16y/o presents with a fishy, green vaginal discharge. The symptoms have been present for 2 weeks and includes pruritus, dysuria and frequency. Vaginal swabs were taken and showed a motile flagellate on wet film microscopy. What is the likely diagnosis?
Trichomonas Vaginalis
Tx: oral metronidazole 500mg twice daily for 7 days
A 26 year old lady attends the gynaecology clinic complaining of a yellowish vaginal discharge. A high vaginal swab is taken and submitted to the laboratory. The laboratory sees the organism shown moving about on microscopy. What is the likely diagnosis?
Trichomonas Vaginalis - Parasite (protozoa)
Tx: oral metronidazole 500mg twice daily for 7 days or 2g as a single dose
A 23 y/o woman presents complaining of itchy vaginal discharge. She is in a stable relationship and is not on any OCP’s. On examination you notice a red and oedematous labia with white spongy areas. What is the likely diagnosis?
Candidiasis
tx: clotrimazol pessaries
18y/o woman presents complaining of feeling wet all the time. She is on the COCP. What is the likely diagnosis?
Ectropion
a common condition caused when cells from inside the cervical canal, (columnar epithelium - secretory), are present on the transformation zone, outside the cervix
A 22y/o male presents to the GUM clinic complaining of a flu-like illness with fever, headache and backache. He also noticed a few small, fluid filled itchy blisters on his genital area. He also complains of severe burning on micturition. What is the likely diagnosis
Genital herpes
Herpes simplex
A 36y/o homosexual male presents to the GUM clinic complaining of white plaques on his mouth. While examining the patient you notice bluish-brown nodules on his arm. What is the likely diagnosis
oral candidiasis - an oppotunistic infection found in immunosuppressed HIV patients
Karposi’s sarcoma is a cutaneous manifestation of AIDS, initially caused by proliferation of small blood vessels in the dermis. Later nodules are formed.
A 22y/o presents to the emergency department feeling unwell and with a high fever. She has vaginal discharge, dysuria and painful intercourse. while examining the patient you notice a large lump in the vulval area, which her GP diagnosed to be a Bartholis access. What is the likely diagnosis?
Gonorrhoea
PID - the finding of a bartholian’s access is diagnostic
in the past 50% of women in the reproductive age group with a BA tested positive for gonorrhoea