STI

Question 1

STI vs STD

Answer 1

• STI, an infection by a pathogen which is sexually transmissible and which is unlikely to be transmitted by non-sexual means
• STD, a disease cause by an STI (e.g. pelvic inflammatory disease or genital warts)

Question 2

3 venereal diseases

Answer 2

• Syphilis (treponema pallidum)
• Gonorrhoea (neisseria gonorrhoeae)
• Chancroid (haemophilus ducreyi)

Question 3

Bacteria that causes chlamydia

Answer 3

Chlamydia trachomatis

Question 4

4 viral STIs

Answer 4

• HSV
• HIV
• HPV
• Molluscum contagiosum virus (MC)

Question 5

3 parasitic STIs

Answer 5

• Pthirus pubis (pubic louse)
• Sacroptes scabei (Scabies)
• Trichomonas vaginalis

Question 6

4 characteristic of an STI

Answer 6

• Transferrable
• Usually asymptomatic
• All manageable but not always curable
• Avoidable

Question 7

4 STIs that can be caught by genital contact only

Answer 7

• Pubic lice (Pthirus pubis)
• Scabies (Sacroptes scabeii)
• Warts (HPV type 6 & 11)
• Herpes (HSV types 1 & 2)

Question 8

Systemic symptoms of an STI

Answer 8

• Fever
• Rash
• Lymphadenopathy
• Malaise
• Infertility (chlamydia)

Question 9

3 common STI’s

Answer 9

• Trichomonas vaginalis (142.5 million)
• Chlamydia trachomatis (78.3 million)
• Neisseria gonorrhoeae (78.3 million)

Question 10

A relatively uncommon STI

Answer 10

Syphilis (5.6 million)

Question 11

What does an R0 > 1 and < 1 mean

Answer 11

• > 1 = epidemic is sustained

- <1 = epidemic reduces

Question 12

Components of Hx when an STI is suspected

Answer 12

• PC + Hx of PC
• Past medical + social Hx
• Drug Hx
• Gynae Hx
• Direct questions about symptoms (e.g. discharge from penis or pain in abdomen)

Question 13

7 components of sexual Hx

Answer 13

• When did you last have sex
• Casual vs regular partner and how long have they been seeing this partner
• Were they male or female
• Nature of sex, straight/gay/MSM
• Were condoms used
• Other contraception used
• Nationality of contact

Question 14

Risk assessment for men

Answer 14

• Have you ever had sexual contact with a man
• Ever injected drugs or had sexual contact with someone who has
• Sexual contacted with anyone from outside the UK (clarify?)
• Medical treatment outside the UK (clarify)
• Involvement with sex industry (had sex with a prostitute?)

Question 15

2 methods of partner notification

Answer 15

• Patient tells contact, “client referral”

- NHS tells contact, “provider referral”

Question 16

What condoms not good at protecting against

Answer 16

• Herpes

- Warts

Question 17

What are condoms good at protecting against

Answer 17

• HIV
• Chlamydia
• Gonorrhoea

Question 18

4 stages of management of someone with symptoms suggesting STI

Answer 18

• Good history
• Partner notification
• HIV testing
• Health promotion