Genitourinary Medicine Flashcards
What is bacterial vaginosis?
= bacterial imbalance of the vagina caused by overgrowth of anaerobic bacteria
(such as Gardnerella vaginalis)
Most common cause of abnormal vaginal discharge in women of childbearing age?
= bacterial vaginosis
What is the Amsel criteria used for?
= used to diagnose bacterial vaginosis
What features are involved in the Amsel criteria for BV?
- vaginal pH > 4.5
- homogenous grey or milky discharge
- positive whiff test (additional of 10% potassium hydroxide produces a fishy odour)
- clue cells present on wet mount
(3 out of the 4 features are needed to confer a diagnosis)
In what condition may clue cells be present on wet mount?
= bacterial vaginitis
Treatment of choice for bacterial vaginitis (2)
= Metronidazole or Clindamycin
What is chancroid?
= sexually transmitted infection (STI) of the genital skin primarily caused by the gram-negative bacillus Haemophilus ducreyi
infection typically manifests as a painful, potentially necrotic genital lesion. Commonly associated symptoms include painful lymphadenopathy and bleeding on contact
Patient presents with painful genital lesion which bleeds on contact. They have painful lymphadenopathy and have just come back from Greenland.
What is the diagnosis which comes to mind?
= Chancroid
Chancroid is usually diagnosed based on a clinical picture. However, what investigations can be used to help confirm diagnosis? (2)
- culture
- PCR (faster)
Treatment of chancroid?
= managed using antibiotics:
- Ceftriaxone
- Azithromycin
- Ciprofloxacin
What is Chlamydia caused by?
= Chlamydia trachomatis
(an obligate intracellular bacterium)
What are the risks to neonates if they are exposed to chlamydia during delivery? (2)
= can develop pneumonia or conjunctivitis
How is chlamydia tested for?
= nucleic acid amplification tests (NAATs) - swabs taken
Pharmacological treatment for chlamydia
(including dosage)
= orał doxycycline 100mg twice daily for 7 days
What inflammatory joint condition is a known chlamydia complication?
= reactive arthritis
What is AIDS?
(CD4 count less than?)
= terminal stage of HIV infection where combination antiretroviral therapy (cART) has not halted the spread of the virus
It is defined by presence of an AIDS-defining illness alongside a CD4 count of less than 200 cells/mm3
Causative agent of AIDs?
= HIV
How is HIV transmitted? (4)
- unprotected sexual contact
- sharing of infected needles
- mother-to-child transmission during birth or breastfeeding
- exposure to infected blood products
How are we able to determine the progression of AIDs in a patient?
= CD4 cell count
What are the different ways combined hormonal contraception (CHC) can be administered? (3)
- orally, pill form
- transdermally, via patch
- intravaginally, through use of vaginal ring
How does combined hormonal contraception function? (3)
- thickening cervical mucous, obstructing sperm
- thinning of endometrium, making transplantation difficult
- inhibits ovulation
What is the difference in hormone dosages with the 3 different types of oral combined contraceptive pills?
- monophasic
- phasic
- everyday pills
Monophasic: each pill has same dose of hormones
Phasic: pills contain different amounts of hormone and must be taken in correct order
Everyday pills: usually contain 21 hormone-containing pills, and 7 hormone-free pills
When starting on combined hormonal contraception, when will a patient be protected from day 1?
= if patient starts the pill on 1st day of natural period
For how long must a women use additional precautions when starting combined hormonal contraception, if unsure where abouts in her cycle she is?
= for 7 days
How long postpartum can a patient begin combined hormonal contraception?
= 21 days postpartum, as long as NOT breastfeeding
What hormone is in contraceptive injection?
= progesterone
How often is the contraception injection given?
= every 13 weeks
Side-effects of contraception injection? (2)
- associated with weight-gain
- can take some time for fertility to return (6-12 months)
Which contraceptive method has been associated with weight gain?
= contraception injection
What is fitz-hugh-curtis?
= medical condition that describes perihepatitis, a condition characterised by inflammation of the liver capsule and the subsequent development of adhesions
What infections can cause fitz-hugh-curtis? (2)
- Neisseria gonorrhoeae infection
- Chlamydia trachomatis infection
How are adhesions in Fitz-hugh-curtis syndrome treated?
= surgical intervention, laparoscopic adhesiolysis
What is genital herpes?
= infectious disease characterised by the appearance of painful sores or ulcers on the genitals
Caused by infection with the herpes simplex viruses, either HSV-1 or HSV-2
Is HSV-1 or HSV-2 associted with oral herpes?
= HSV-1
Treatment of genital herpes?
- Aciclovir 400mg 3 times daily for 5 days
- Valaciclovir 500mg twice daily for 5 days
- Aciclovir 200mg five times daily for 5 days
- Famciclovir 250mg 3 times daily for 5 days
What is genital candidiasis?
= often referred to as a yeast infection. Is an inflammation of the vagina and the vulva due to an overgrowth of the yeast fungus, primarily Candida albicans
Main causative organism of genital candidiasis?
= Candida albicans
Key factors which may increase the risk of developing a Candida infection (3)
- pregnancy
- antibiotics use
- immunosuppression
What is white curdy, or lumpy discharge suggestive of?
= genital candidiasis (thrush)
Management of genital candidiasis?
= antifungal treatment
oral: Fluconazole, itraconazole
intravaginal: clotrimazole pessary
vulval: topical clotrimazole cream
Oral therapies in the treatment of genital candidiasis should be avoided in…? (2)
- pregnant women
- breast feeding women
Important note to warn patients about if on intravaginal & topical treatments for genital candidiasis?
= can compromise the integrity of latex condoms and diaphragms
What are genital warts caused by? (+ serotypes (2))
= human papillomavirus (HPV)
HPV 6 + 11
Transmission of genital warts
= direct skin-to-skin contact
Genital warts: what is Podophyllotoxin?
= plant-based antiviral that can destroy wart tissue
Genital warts: what is Imiquimod?
= immune response modifier that stimulates the body’s immune system to fight the virus
Genital warts: what is Trichloroacetic acid?
= chemical treatment that burns off warts
Are genital warts likely to come back after treatment (reoccur)?
= yes
Patient should be informed about high likelihood of recurrence despite treatment
Without intervention, what is the likelihood of passing HIV from mother to child?
- 5-10%
- 25-40%
- 50-65%
- > 85%
- 25-40%
When does the majority of HIV transmissions from mother to child happen?
= during labour (90%)
HIV: What is the mother’s viral load cut-off value in which a normal vaginal delivery can be recommended and supported vs. an elective caesarean section recommended?
Mother’s viral load < 50 - normal vaginal delivery can be recommened and supported
> 50 - elective caesarean section recommended
Safest way to feed infants born to women with HIV?
= formula milk
What are AID-defining malignances?
= refer to a set of cancers more prevalent or exclusively found in people with acquired immune deficiency syndrome (AIDS) or human immunodeficiency virus (HIV) infection
Example of AIDS-defining malignangies (3)
- Kaposi’s sarcoma
- High-grade-B-cell non-Hodgkin’s lymphoma
- invasive cervical cancer
Which of the following oncogenic viruses is associated with Kaposi’s sarcoma?
- Epstein-Barr virus (EBV)
- Human Herpesvirus 8 (HHV8)
- Human Papillomavirus (HPV)
- Human Herpesvirus 8 (HHV8)
Which of the following oncogenic viruses is associated with non-Hodgkin’s lymphoma?
- Epstein-Barr virus (EBV)
- Human Herpesvirus 8 (HHV8)
- Human Papillomavirus (HPV)
- Epstein-Barr virus (EBV)
Which of the following oncogenic viruses is associated with invasive cervical cancer?
- Epstein-Barr virus (EBV)
- Human Herpesvirus 8 (HHV8)
- Human Papillomavirus (HPV)
- Human Papillomavirus (HPV)
What is molluscum contagiosum?
= common, contagious skin infection caused by the molluscum contagiosum virus, a member of the poxvirus family
Small, smooth, pearly-coloured papules with a central area of umbilication are suggestive of?
= molluscum contagiosum
Management options for molluscum contagiosum (3)
- cryotherapy
- topical treatments e.g., salicyclic acid, potassium hydroxide, imiquimod
- curettage
Is Neisseria gonorrhoea gram positive or negative?
= gram negative
Extragenital complications associated with gonorrhoea? (3)
- pharyngitis
- rectal pain & discharge
- disseminated infection
Investigations for gonorrhoea? (4)
- self taken vulvovginal swab in women, or first pass urine in men
- microscopy (monomorphic gram-negative diplococci wihtin polymorphonuclear leukocytes)
- nucleic acid amplification tests (NAAT)
- culture
The following findings on microscopy is suggestive of which sexually transmitted infection?
Findings: monomorphic gram-negative diplococci within polymorphonuclear leukocytes
= gonorrhoea
Mainstay treatment for gonorrhoea?
= antibiotics
First-line: Ceftriaxone
Important to include following treatment for gonorrhoea?
= test of cure - essential to monitor disease clearance and assess effectiveness of chosen antibiotic regimen
Complications associated with gonorrhoea (3)
- infertility
- disseminated infection (affecting joints)
- susceptibility to HIV infection
What is priamary HIV infection?
= the phase that commences immediately after the initial exposure to HIV
This phase is characterised by a surge in viral replication and often coincides with the onset of clinical symptoms
Retroviruses that cause primary HIV infection (2)
- HIV-1
- HIV-2
Transmission of HIV (3)
- sexual
- parenteral (e.g., injection drug use, needlestick injury)
- mother to child (during childbirth or breastfeeding)
HIV: symptoms onset within 3 weeks of infection, lasting longer than 2 weeks OR involving the CNS, is associated with?
= rapid progression to AIDS
How is HIV primarily established (diagnosied)?
= serum HIV ELISA (enzyme-linked immunosorbent assay)
Positive results must be confired using a second test
Management of primary HIV infection? (2)
= combination antiretroviral therapy (cART)
(offered to all regardless of their CD4 count)
= Contact tracing necessary
In primary HIV infection, is the CD4 count used to assess if cART should be offered?
= no, offered to all regardless of CD4 count
What is Erythroplasia of Queyrat (EQ)?
= type of squamous cell carcinoma in situ
Well-circumscribed, red, and painless lesion on the gland or prepuce (foreskin)