SEXUAL HEALTH + GUM TO DO Flashcards
CHLAMYDIA
How would you manage chlamydia?
- Test for other STIs, contraceptive advice, ?safeguarding if child.
- Doxycycline 100mg BD for 7d (C/I pregnancy or breastfeeding).
- 1g azithromycin stat dose in pregnancy (erythromycin or amoxicillin safe too)
- Referral to GUM for partner notification + contact tracing.
GONORRHOEA
What are the systemic complications of gonorrhoea?
- PID
- Gonococcal arthritis (most common cause of septic arthritis in young adults)
- Disseminated gonococcal infection as triad (tenosynovitis, migratory polyarthritis, dermatitis lesions can be maculopapular or vesicular)
GONORRHOEA
What is the management of gonorrhoea?
- 1g single dose IM ceftriaxone (add PO ciprofloxacin 500mg but only if sensitive as high antibiotic resistance)
- Follow-up test of cure with NAAT testing or cultures
- Contact tracing, partner notification, contraceptive advice, ?safeguarding
SYPHILIS
What is the clinical presentation of secondary syphilis?
- Systemic (low grade fever, lymphadenopathy).
- Maculopapular rash (trunk, soles + palms).
- Condylomata lata (grey wart-like lesions around genitals + anus).
- Alopecia
- Buccal ‘snail track ulcers’
SYPHILIS
What is the clinical presentation of tertiary syphilis?
- Gummas (granulomatous lesions that can affect skin, organs + bones)
- Aortic aneurysms
- Neurosyphilis – tabes dorsalis (locomotor ataxia), paralysis, dementia, Argyll-Robertson (prositutes) pupil
SYPHILIS
What investigations would you do for syphilis?
- Treponemal tests (enzyme immunoassay or haemagglutination assay)
- Samples from site of infection tested with dark field microscopy or PCR
SYPHILIS
How would you manage syphilis?
- Specialist GUM (full STI screening, contact tracing, contraceptive information).
- Single dose IM benzathine benzylpenicillin or PO doxycycline if allergic
SYPHILIS
What is a potential adverse effect of treating syphilis?
- Jarisch-Herxheimer reaction within a few hours of treatment
- Fever, rash + tachycardia thought to be due to release of endotoxins following bacterial death
GENITAL HERPES
What other specific symptoms may be seen in genital herpes?
- Aphthous ulcers (small painful oral sores)
- Herpes keratitis (inflammation of the cornea = blue)
- Herpetic whitlow (painful skin lesion on finger/thumb)
GENITAL HERPES
What is the main complication of genital herpes in pregnancy?
Does the foetus have any immunity?
- Neonatal HSV infection as high morbidity + mortality.
- After initial infection woman will produce IgG that cross placenta to give foetus passive immunity + protect during labour + delivery
GENITAL WARTS
What are the investigations for genital warts?
- Clinical diagnosis (may use magnifying glass or colposcope)
- Application of acetic acid/vinegar produces acetowhite changes of surface
- Biopsy if atypical
GENITAL WARTS
How is genital warts managed?
- Prophylaxis with HPV vaccine for 12–13y (may be given to MSM, trans men/women + sex workers)
- Topical podophyllotoxin cream/lotion or cryotherapy.
- GUM contact tracing, contraceptive advice
LICHEN SCLEROSUS
What is the clinical presentation of lichen sclerosus in men?
- Painful erections
- Dyspareunia
- Urinary Sx
- Soreness
HIV
What is HIV?
What is the pathophysiology of HIV?
- RNA retrovirus that encodes reverse transcriptase
- Binds to GP120 envelope glycoprotein to CD4 receptors which migrate to lymphoid tissue where virus replicates + produces billions of new virions
- Reverse transcriptase makes single strand RNA > double stranded DNA + viral DNA is integrated to host cell’s DNA with enzyme integrase + core viral proteins synthesised + cleaved by viral protease
- These then released + in turn infect new CD4 cells
HIV
What are AIDS-defining illnesses?
Give some examples
- All associated with end-stage HIV infection where CD4 count dropped to a level that allows opportunistic diseases to occur.
- Kaposi’s sarcoma, pneumocystis jiroveci pneumonia, cytomegalovirus, candidiasis (oesophageal or bronchial), lymphomas, TB
HIV
What tests can be used to investigation HIV?
- Serum/salivary HIV enzyme-linked immunosorbent assay (ELISA)
- Rapid point of care screening blood test for HIV antibodies
- PCR testing
HIV
Explain the process of HIV ELISA
Can take 3m for HIV Ab detection so confirmatory assay after 3m.
HIV
What are the considerations with HIV and pregnancy?
- Normal vaginal delivery if viral load <50 copies/ml
- Consider c-section if >50, but mandatory in >400
- IV zidovudine 4h before c-section
- Neonatal PO zidovudine if maternal viral load <50 if not triple ART both for 4–6w
- No breastfeeding
HIV
What is the generic management for HIV?
What is the standard therapy?
What is the aim of therapy?
- Specialist HIV, infectious diseases + GUM clinics
- Highly active anti-retrovirus therapy (HAART) with 2 NRTIs + third agent
- Goal to achieve normal CD4 count + undetectable viral load
HIV
What are the 4 main groups of HIV treatment?
- Nucleoside reverse transcriptase inhibitors (NRTIs)
- Protease inhibitors (PIs)
- Integrase inhibitors (IIs)
- Non-nucleoside reverse transcriptase inhibitors (NNRTIs)
HIV
What are some examples of and the mechanism of action of…
i) NRTIs?
ii) PIs?
iii) IIs?
iv) NNRTIs?
i) Zidovudine, tenofovir, emtricitabine – inhibits synthesis of DNA by reverse transcriptase
ii) Indinavir (end –navir) – acts competitively on HIV enzyme involved in production of functional viral proteins
iii) Raltegravir (end –gravir) – inhibits insertion of HIV DNA to genome
iv) Nevirapine – binds directly to + inhibits reverse transcriptase
HIV
What additional management can be given to HIV +ve patients?
- Education about safe sex + condoms, less partners, regular tests.
- Prophylactic co-trimoxazole if CD4 <200 to protect from PCP
- Monitor blood lipids + CVD RFs as increased risk
- Yearly smears for women
- Vaccines up to date but avoid live vaccinations
- Can conceive safely via techniques like sperm washing + IVF
SYPHILIS
What is the causative organism?
Treponema pallidum – spirochete (spiral-shaped) bacteria
CANDIDIASIS
What are some risk factors?
Increased oestrogen (pregnancy, during menstrual years)
poorly controlled DM,
immunosuppression,
broad spectrum Abx
HIV
What are high risk groups for HIV?
MSM,
IVDU,
commercial sex workers
HIV
When is HIV classified as AIDS?
AIDS = Sx of immune deficiency and a CD4 count of <200
HIV
Explain the process of rapid point of care tests.
Immunoassay kit provides rapid result but needs serological confirmation, repeat within 3m of exposure if initially negative.
HIV
Explain the process of PCR testing
P24 antigen tests directly for viral antigen in blood + can give +ve earlier in infection compared to antibody test, HIV RNA levels tests directly for number of viral copies in blood giving a viral load
BALANITIS
what are the causes?
candidiasis
dermatitis
bacterial
anaerobic
lichen planus
lichen sclerosis
BALANITIS
what are the acute causes?
candidiasis
dermatitis
bacterial
anaerobic
BALANITIS
what are the chronic causes?
lichen sclerosis
plasma cell of balanitis of Zoon
BALANITIS
what is the general management for balanitis?
- gentle saline washes
- ensuring to wash foreskin properly
- 1% hydrocortisone for short period
LYMPHOGRANULOMA VENEREUM
what is it?
STI caused by serovars L1, L2 or L3 or chlamydia trachomatis
LYMPHOGRANULOMA VENEREUM
what are the clinical features?
Painless genital ulcer
Appears 3-12 days after infection
May not be noticeable e.g. if occurs inside the vagina
Inguinal lymphadenopathy
Proctitis, rectal pain, rectal discharge (in rectal infections)
Systemic symptoms such as fever and malaise
LYMPHOGRANULOMA VENEREUM
what are the investigations?
swab PCR to detect chlamydia trachomatis
LYMPHOGRANULOMA VENEREUM
what is the management?
Treatment is with antibiotics. Common regimes include:
Oral doxycycline 100 mg twice daily for 21 days
Oral tetracycline 2 g daily for 21 days
Oral erythromycin 500 mg four times daily for 21 days
CHANCROID
what is it?
Chancroid is an infection of the genital skin caused by Haemophilus ducreyi.
It typically produces a painful, potentially necrotic genital lesion.
Associated symptoms include painful lymphadenopathy and bleeding on contact.
CHANCROID
what are the causes?
Haemophilus ducreyi
Given its relatively high incidence in topical areas and Greenland, it is important to inquire in the history about recent travel.
CHANCROID
what are the clinical features?
A painful genital lesion which may bleed on contact
Associated symptoms include painful lymphadenopathy
CHANCROID
what are the investigations?
clinical diagnosis
diagnosis can be confirmed using culture or PCR
CHANCROID
what is the management?
The infection is treated using antibiotics (typically Ceftriaxone, Azithromycin or Ciprofloxacin)