SEXUALLY TRANSMITTED INFECTIONS IN MALES Flashcards
What is dysuria?
Burning pain sensation during urination
What are the two most common causes of urethritis in men?
Gonorrhoea infection
Chlamydia infection
What are the less common causes of urethritis in men?
Mycoplasma genitalium infection
Trichomoniasis
Herpes simplex virus infection
Adenovirus infection
E. coli infection
Urinary tract infection
Trauma
Foreign body
Autoimmune - associated with reactive arthritis and allied conditions
How long does symptomatic gonorrhoea take to develop after exposure (incubation period)
2-5 days
How long do symptoms of chlamydia take to develop after exposure (incubation period)?
Normally 1-2 weeks, but pretty much always less than 4 weeks
What is the bacteria that causes gonorrhoea and what class of bacteria is it?
Neisseria gonorrhoea
Gram negative intracellular diplococci
What is the bacteria that causes chlamydia and what class of bacteria is it?
Chlamydia trachomatis
Gram negative obligate intracellular bacterium
What are the type of chlamydia that cause STIs?
Types D-K
What are the initial sites of infection of chlamydia?
Epithelial cells of urethra, cervix, rectum, pharynx, and conjunctiva.
What are the two main symptoms of chlamydia in males?
Urethral discharge
Dysuria
As well as the urethra, what other sites may be symptomatic in a chlamydia infection?
Proctitis
Conjunctivitis
Epididymo-orchitis
Reactive arthritis
What are the initial sites of infection of gonorrhoea?
Columnar epithelium of urethra, endocervix, rectum, pharynx, or conjunctiva
What are the main symptoms of gonorrhoea in men?
Urethral discharge
Dysruria
Tender inguinal lymph nodes
As well as the urethra, what other sites may be symptomatic in a gonorrhoea infection?
Epididymo-orchitis Abscesses of paraurethral glands Pharyngitis Rectum Conjunctivitis
Disseminated infection involving skin, joints and heart valves
What is the main method of diagnosis of chlamydia?
Nucleic Acid Amplification Test (NAAT)
What is the main method of diagnosis of gonorrhoea?
Detection of gram negative intracellular diplococci in smears and culture
What is the method used for screening of asymptomatic gonorrhoea?
PCR testing of urine sample
When performing a urethral smear for microscopy, what must you advise the patient to do for optimal results?
Optimal results for gram stain and culture are obtained from patients who have held their urine for 4 hours or more.
What would confirm urethritis on microscopy of a urethral smear?
Five or more polymorphs per high power yield.
If the smear shows gram negative intracellular diploccoci, what infection would you treat the patient for?
This is suggestive of gonorrhoea, however, often patients are treated for both gonorrhoea and chlamydia to cover the possibility of mixed infection. Meanwhile confirmatory tests will be carried out to confirm the presence of chlamydia.
Other than urethral smear, what investigations would be carried out on someone who presents with urethral discharge to confirm the aetiology of infection?
Nucleic Acid Amplification Test (NAAT) on first pass urine