Transcript Sexually transmitted diseases

Sexually transmitted diseases
“Venereal Diseases”
Example Bacterial STDs
Gonorrhea
Syphilis
Chlamydia
Example Viral STDs
Herpes
genital warts
HIV
Question
Bacterial STDs
1
How do bacterial STDs cause infection?
Urethra
Fallopian tubes
Testis and ovaries
PID
Question
Bacterial STDs
2
What are characteristics of:
Gonorrhea & Chlamydia
Chlamydia most common
in males
-- thick, yellowish pus
In females
-- vaginal irritation, discharge, etc
…Syphilis
3 stages
Primary (1O) syphilis
‘chancre’ lesion
Secondary (2O) syphilis
rash
Tertiary syphilis
Question
Bacterial STDs
3
A Souvenir of London
Bought a souvenir in London
got to hide it from my mum.
Can't declare it at the customs,
but I'll have to take it home.
Tried to keep it confidential,
but the news is leaking out.
Got a souvenir of London.
There's a lot of it about.
Yes I've found a bit of London,
and I'd like to lose it quick.
Got to show it to my doctor,
'cos it isn't going to shrink.
Want to keep it confidential,
but the truth is leaking out.
Got a souvenir of London.
There's a lot of it about.
by Procol Harum, 1973
ASoL
Bacterial STDs
4
Viral STDs
How are viruses different
from bacteria?
Why are viral diseases more
difficult to treat?
Bacterial STDs
5
Viral STDs
Herpes (Herpes simplex virus)
HSV-I : oral fever blisters
HSV-II: genital herpes
Human papilloma viruses
genital warts
cervical cancer
HIV
Attacks cells of the immune system
-- T-cells
Bacterial STDs
6
AIDS
Question
What are the clinical stages
of an HIV infection?
1. Acute symptomatic
2. Chronic asymptomatic
3. AIDS
There is no cure
What about a vaccine?
Bacterial STDs
7
How does HIV cause death?
-- AIDS-associated diseases
Bacterial STDs
8
AIDS Epidemiology
Incidence
Transmission
HIV-I vs HIV-II
Cost of AIDS drugs
Question
What about an AIDS vaccine??
Bacterial STDs
9