STD Flashcards
High risk populations for STD
youth (15-24)
Racial/ethnic minorities (black, Hispanic)
MSM (72% syphilis in 2011, high HIV coinfect)
What is Vulvovaginal Candidiasis (VVC) and what causes it
Common “yeast infection” not STD (at least 75% women have 1 episode)
Cause: Candida albicans 90%
(can be caused by other candida sp. or yeasts - candida glabrata, candida tropicalis etc)
What are the presenting sx associated with VVC?
vulvar pruritis, external dysuria, burning, dyspareunia, swelling, redness, excoriation
Thick curd like vaginal dc
Normal vaginal pH (<4.5)
What are risk factors associated with VVC
taking antibiotics (PCN, Augmentin), immunocompromised pt (on steroid, DM, HIV+)
*warm, moist environment
How do you dx VVC?
Clinically
Testing:
- Wet prep (saline & 19% KOH); micro budding yeast and hyphae (spaghetti and meatballs)
- candida culture usually not needed
How do you treat uncomplicated VVC?
short course (1-3d) topical/vaginal azole such as Clotrimazole (OTC)
What is considered a complicated yeast/VVC infection? How do you treat complicated VVC?
Recurrent (>4 episodes in 1 yr), Sever, non-albicans VVC, uncontrolled DM, immunocomprom
- treat longer (7-14d) with topical/vaginal azole [Clotrimazole] or oral fluconazole (Diflucan)
- if non albicans, avoid fluconazole
If pt has non-albicans VVC, how should they be treated
considered complicated VVC Avoid oral fluconazole treat longer (7-14d) topical/vaginal azole
In VVC, does the male partner need to be treated
NO
unless he has balanitis (inflammation of skin covering glans penis)
How should you treat a pregnant pt with VVC
do not give oral Fluconazole, treat pregnant with Topical treatment (Clotrimazole)
If a pt has recurrent or difficult to treat yeast infections, what should you be suspicious of and test for
DM, HIV
What is BV (bacterial Vaginosis) and what is the cause
BV due to disruption of usual “healthy” vaginal microflora (lactobacillus sp), not an STD
- allows overgrowth of bacteria
- cause is usually polymicrobial, often assoc with Gardnerella vaginalis and Mobiluncus sp (gram variable anaerobes)
What sx are associated with BV
vaginal irritation
thin white or gray dc
strong fishy odor
what are risk factors for developing BV? can you get BV if not sexually active
new or multiple sex partners (but not an STD)
Vaginal douching
*yes, can affect women that are not sexually active
How do you dx BV?
Need at least 3/4 Amsel’s criteria
- thin, white homogenous dc
- Clue cells on microscopy
- Vaginal fluid pH >4.5 (alkaline)
- fishy odor when adding KOH solution (+whiff)
what is the best lab test for dx BV?
GRAM STAIN is best lab test to dx BV
- shows anaerobes known to cause BV and lack of lactobacilli
- Gram stain is gold standard but not generally used clinically
How do you treat BV? do you treat everyone
treat all pt with sx, Male partner doesn’t need tx
- Metro (flagyl) po x 7d
* no alcohol while on metro, disulfuram rxn - Metro gel intravaginally for 5d
- Clindamycin po or intravaginally
How do you treat pregnant pt with BV?
Use oral med (Metro po x7d) in order to maker sure treating entire vaginal tract
*opposite of VVC, where you use topical clotrimazole and don’t use oral fluconazole
What are some complications of BV?
Increases risk of acquiring/transmitting HIV
Increases risk fo acquiring herpes, GC, CT
Association with PID (not direct cause)
What is Trichomoniasis, what causes it, and how frequent?
Trich is most common non-viral STD
cause: Trichomonas vaginalis (single celled protozoan parasite)
- common
- sx 1-4 wk post exposure (usually vaginal sx), men usually asymp
Though men are usually asymp in Trich, if have sx, what are they and how often do they occur?
Sx in <10% cases
*sx of urethritis: clear or mucupurulent urethral dc and/or dysuria
How do pt normally present with Trichomoniasis
*Increased vaginal pH >4.5 (like BV)
*vaginal irritation, malodorous/fishy, frothy, yello-green discharge
*petechiae on cervix or vagina
STRAWBERRY CERVIX
How would you diagnose a pt with Trichomoniasis
- largely on wet mount (do quickly), see motile flagellated organisms
- Swab (vaginal, cervical) then culture but may take up to 7 d
- Other: NAAT to detect genetic material: (faster, more sensitive), preferred for males
- May identify on PAP smear
* testing difficult on males, know 5-20% of men with NGU have trich
How do you treat Trichomoniasis
Treat every: pt & partner with METRO (FLAGYL) po
- no sex for pt and partner till tx complete
- consider treating for CT and GC
What are complications of Trichomoniasis
increases risk fo acquiring and transmitting HIV
What should pregnant pt with Trichomoniasis be aware of
Trich increases risk of PROM, preterm delivery, LBW yet tx is not shown to reduce risks
- treat pt with sx
- no breastfeeding will on Metro (flagyl)
What is CT and what causes it
Chlamydia (CT) is the most common bacterial STI in the US, peaks in late teens early 20s
Cause: Chlamydia trachomatis (G- bacterium)
Who should be screened for CT and what do CT pt commonly have
- women <25 screen for chlamydia yearly
- screen older women with risk factors, all preg pt
- routine screening for Males not recommended
- Pt frequently co-infected with gonorrhea
What sx do pt with CT normally have
- often Asymp (50% M, 80% women asymp)
- sx 1-3 wk post exposure
- women: cervical dc, vaginal bleeding, low abdominal, Fever/chill, adnexal/uterine tenderness
- Men: irritated urethra/urethritis, penile dc, dysuria
- can cause oral and rectal infections
Chlamydia and gonorrhea are more _____ where as BV, Trich and VV are more ________
CT and GC = cervicitis
BV, VV, Trich = vaginitis
Chlamydia: what are Women sx
asymp in 80%
vaginal bleeding, cervical dc, low abdominal pain, fever chills, adnexal/uterine/cervical tenderness
Chlamydia: what are Male sx
Penile dc, urethritis, dysuria
How do you dx Chlamydia?
a) Swab: cervical, vaginal or male urethral - NAAT
b) Urine: NAAT
c) Pharynx or rectal swab: NAAT, check with lab
* sensitivity a bit better with swab; plus can test for Trich, GC at same time
How do you treat Chlamydia
Treat everyone: pt/partner (if possible test partner)
*in AZ can treat partner without testing
Doxy po x 7d OR
Azithromycin (Zithromax) po x1dose
No sex during tx (or 7 d post Zithromax)
What are some notes about treating pt with Chlamydia (treated with doxy x 7d or Azithromycin x 1d)? Pregnancy recommendation?
Consider treating for gonorrhea too
no sex during tx or 7d after Zithromax tx
Retest in 3-4 month
*Preg = do Doxy bc Preg cat D
TREAT PREG WITH ZITHROMAX
*retest 3 wk after preg pt tx
What are some complications of Chlamydia
Increases risk of acquiring and transmitting HIV
- left untreated, can cause PID and assoc complications
- in M: can cause epididymitis
What should a pregnant pt with CT be aware of
- May lead to preterm delivery
- transmittable to neonate during delivery:
- conjunctivitis (ophthalmia neonatorum) &
- pneumonia
- can cause other respiratory tract infections
- ocular specimens should be tested for GC, CT
NO DOXY FOR PREG, only zithromax
What causes GC, when do pt get sx and who should you screen
cause: Neisseria gonorrhea (G- diplococci bac)
* screen pt at risk (USPSTF)
- risk: GC, other STD, new/mult partners
* pt often co-infected with chlamydia
sx 1-14 d post exposure
What sx does a pt with GC have
similar to CT but more severe
*more mucupurulent dc, abdominal pain, etc
WOMEN: vaginal dc, low abdominal pain, fever, cervical motion tenderness
MEN: urethritis, white yellow or green penile dc, dysuria
(can cause oral and rectal infections)
How do you dx pt with GC
Swab or urine (like Chlamydia)
How do you treat GC
tx all (pt/partner)
Ceftriaxone (Rocephin) IM injection PLUS azithromycin or doxycycline (to cover CT)
- no sex during tx
- retest 3-4 mth
What are complications of GC
increase risk getting/giving HIV
If untreated can cause PID and associated complications (males can cause epididymitis)
*can cause conjunctivitis, meningitis, endocarditis, disseminated disease