STIs/Genital syndromes Flashcards
What is the definition of a commensal microorganism?
A microorganism that derives food or other benefits from another microorganism without hurting or helping it
What is a pathogen?
A micro-organism that can cause disease
What is a sexually transmissable organism?
A virus, bacteria, protozoan, insect or arthropod which can be spread by sexual contact
- Commensal
- Pathogen
What is a sexually transmitted infection (STI)?
An infection by a pathogen which is sexually transmissible and which is unlikely to be transmitted by non-sexual means
eg Neisseria gonorrhoeae
HPV type 6
What is a sexually transmitted disease (STD)?
A disorder of structure or function caused by a sexually transmitted pathogen
- Pelvic inflammatory disease
- Genital warts
List some sexually transmitted bacteria
Syphilis (Treponema pallidum pallidum) Gonorrhoea (Neisseria gonorhoeae Chlamydia trachomatis Klebsiella granulomatis Mycoplasma genitalium Chancroid (Haemophilus decreyi)
List some sexually transmitted viruses?
HSV
HIV
HPV
Molluscum conatagiosum virus
List some sexually transmitted parasites?
Pthirus pubis
Sarcoptes scabei
Trichomonas vaginalis
List some characterstics of STIs
- Transmissable
- Mostly asymptomatic
- All manageable, not always curable
- Avoidable
What are the implications around STIs?
- Partner notification
- Prevention from population
- Treatment and prevention of complications
- Primary prevention - education
Which STIs require only genital contact for transmission?
- Pubic lice
- Scabies
- Warts (HPV 6+11)
- Herpes (HSV 1 + 2)
Which STIs require group sex for transmission?
Hepatitis C
What are some systemic symptoms from STIs?
- Fever
- Rash
- Lymphadenopathy
- Malaise
- Infertility
- Cancer
Why are STIs important?
- Cause morbidity and can kill
- Unpleasant symptoms + psychological
- Drain on resources
- Common
What are possible reasons for number of STI diagnosis changing over time?
- Change in number of cases (Different practices etc)
- Change in diagnosis, but no change in cases (More access, better testing)