STI Flashcards
Most common bacterial STI
Chylamydia
Most common viral STI
HPV, HSV-2
Most common parasitic STI
trichomoniasis
Which two groups are most affected by chlamydia
- Native women
2. Black women
Who is most affected by primary and secondary syphyllis?
MSM
1/2 MSM who are diagnosed with syphillis also have what?
HIV
What causes Trichomoniasis
Trichomonas vaginalis (single celled protozoan)
What is the most common presentation for infection with Trichomonas vaginalis?
asymptomatic
Trichomoniasis clinical presentation
- Vaginal pH increases >4.5
- Frothy, malodorous, yellow-green discharge
- Petechiae on cervix/vagina (“strawberry cervix”)
What is the initial test to diagnose Trichomoniasis
Visualize motile organisms on wet mount**
What is the most sensitive test for Trichomoniasis
Nucleic Acid Amplification test (NAAT)
faster than culture
What if you’re doing a pap smear and you find Trich, what tx?
NONE, Ignore it
Trichomoniasis: Tx
Metronidazole (Flagyl) 1 oral dose
- abstain from sex during treatment
- retest within 3 months***
Trichomoniasis: Complications/Pregnancy
- Increased risk of getting/giving HIV
- Lactating women should stop breastfeeding for 12-24 hours after metronidazole
Chlamydia: caused by
Chlamydia trachomatis (gram negative)
Who should be screened for Chylamydia?
Women under 25 should be screened yearly
What is chylamydia frequently co infected with?
gonorrhea
What is the most common clinical presentation of chylamydia?
asymptomatic
Chlyamydia: symptoms women vs. men
women: cervical discharge, vaginal bleeding, low abdominal pain, fever/chills
men: urethritis, penile discharge, dysuria
Chlamydia: initial test
-First catch urine*
Best test = NAAT
Chlamydia: treatment
Azithromycin (Zithromax) 1 dose [abstain from sex for a week after treatment]
or
Doxycycline x7 days (avoid in pregnancy)
After treating chlamydia or gonorrhea, when do you need to retest?
3-4 months
If pregnant: 3 weeks after treatment
Chlamydia and Gonorrhea: complications
- Increased risk of giving and getting HIV
- PID
- epididymitis in men
What is a leading cause of conjunctivitis and pneumonia in newborns?
Chlamydia
What is gonorrhea caused by?
Neisseria gonorrhea (gram negative diplococci)
Who should be screened for gonorrhea?
Annually for sexually active women under 25
What is the clinical presentation of gonorrhea?
women: like chlamydia but more severe
- most are asymptomatic
men:
- urethritis
- white/yellow/green discharge
- dysuria
Where else can you be infected with Gonorrhea and Chlamydia?
oral and rectal
What will a gram stain show for gonorrhea?
PMN with intracellular gram-negative diplococci
Gonorrhea: Treatment
Ceftriaxone (Rocephin) 250mg IM
+
Azithromycin 1 gram PO (or doxycycline)
Gonorrhea: initial test
first catch urine
What is gonorrhea prophylaxis for newborns?
topical erythromycin in the eyes ASAP after delivery