Infections Flashcards
Vaginal Ecosystem
- what type of pH is normally present in the vagina
- what organism maintains the normal pH of the vagina
Vaginal Ecosystem
- acidic pH in the vagina = normal
- Lactobacilli maintains normal pH of the vagina
Wet Mount
- What 4 things/diseases can be identified
Wet Mount: can identify
- Clue cells (BV)
- Pseudohyphae (Candidasis)
- Trichomonads (Trich)
- WBCs + RBCs `
What is the #1 cause of vaginitis?
1 cause of vaginitis = BV
- What type of vaginitis occurs when there’s decr lactobacilli –> overgrowth of norm flora
- what MC bacteria = cause
- decr lactobacilli –> overgrowth of bacteria = BV (Bacterial Vaginosis)
- MC bacteria for BV = Gardnerella Vaginalis
25 y/o F presents w/ increased discharge. She has had multiple sex partners, has had unprotected sex, and started seeing someone new a few weeks ago. She smokes and douches. On PE you notice copious, thin grey d/c non-adherent to the vaginal wall and a fishy odor.
- Dx?
- What do you expect KOH whiff test to be?
- What do you expect to see on wet mount?
- What do you expect pH to be?
- Dx = BV
- KOH whiff test
- wet mount –> clue cells w/ fuzzy borders
- pH > 4.5
BV Dx & Tx
- What is the gold std for Dx?
- What are 3 options for 1st line Tx for BV
- What is Tx for pregnant women
BV Dx & Tx
- gold std for Dx = gram stain
- 1st line Tx for BV
- Metronidazole (PO or topical applicator)
- Clindamycin (Topical cream) - Tx for pregnant women = PO Metronizadole (PO Clindamycin)
Tx of BV
- what pt edu must you give for pts on PO Metronidazole
- Do you need to treat the partner?
Tx of BV
- PO Metronidazole –> NO ETOH (disulfiram-like rxn)
- DO NOT need to treat the partner
- What type of vaginitis in pregnancy increases risk of PPROM, preterm delivery + chorioaminionitis
- What should be done 1 month after Tx completion
- BV in pregnancy –> increase risk of PPROM, preterm delivery + chorioaminonitis
- 1 month after Tx completion –> test of cure
Vaginitis: Candidiasis
- What is MC organism/cause
- what type of d/c is a/w it
- what is pH a/w it
- What is expected on wet mount w/ KOH prep
- What is general Tx
Vaginitis: Candidiasis
- MC organism/cause = Candida albicans
- thick, cottage cheese d/c
- normal pH (differs from BV)
- wet mount w/ KOH prep –> pseudoyphae + spores
- general Tx = -azoles
Pt presents w/ vulvar pruritus, burning/irritation, dysuria, dyspareunia. Pt admits to recent ABX use, h/o DM + douching. On PE you note thick, white cottage cheese d/c. On Wet mount w/ KOH prep you see pseudohyphae w/tree branch appearance
Dx?
Dx = Candidiasis
Candidiasis Tx
- What is the PO drug give (x 1 dose, 150 mg)
- What edu must you give pts if prescribing topical -azoles (Ex: Miconazole/Monistat)
- How does Tx differ for recurrent/complicated Candidiasis?
- Should you always Tx if a women is pregnant? What is Tx/type (2)
- What is Tx for C. glabrata
- PO drug = Fluconazole/Diflucan (x 1 dose, 150 mg)
- Topical -azoles (Ex: Miconazole/Monistat) –> no sex
- Tx for recurrent/complicated Candidiasis = longer
- ONLY Tx pregnant women if symptomatic
- TOPICAL Clotrimazole or Miconazole - Tx for C. glabrata = PO Boric acid —> inserted into vagina x 14 days
Pt presents c/o profuse vaginal d/c that is worse w/ menses, dyspareunia, dysuria, + vulvar pruritus/erythema. On PE you note frothy yellow/green d/c and a strawberry cervix.
Dx?
Dx = Trichomonas
Trichomonas Dx/Tx
- What expected on wet mount
- What is 1st line Tx (including dose)
- Should the partner be treated/why
Trichomonas Dx/Tx
- Wet mount –> MOTILE organism w/flagella
- 1st line Tx = 2 g of Metronidazole PO x 1
- YES partner must be treated b/c transmitted sexually
What 4 STIs should all pregnant women be screened for
STI screening in pregnancy
- Syphillis
- HIV
- Chlamydia
- HBV
What are the only 2 organisms that cause mucopurulent cervicitis
only 2 organisms that cause mucopurulent cervicitis
- Neisseria gonorrhoeae
- Chlamydia Trachomatis
Other causes of Cervicitis:
- What types of lesions does HSV cause (2 options)
- What types of lesions does HPV cause + what is there risk of?
Other causes of Cervicitis:
- HSV –> herpes lesion or white plaque resembling cervical CA
- HPV –> condylomata + risk of cervical CA
What type of infxn is caused by an obligate intracellular parasite? –> therefore what test often used to Dx (cultures poorly)
Chlyamida infxn
- caused by an obligate intracellular parasite –> NAAT (DNA test) used to Dx b/c cultures poorly
What is the MC presentation for both men + women w/ Chlamydia?
Other presentations:
- urethritis (both)
- cervicitis (F)
MC presentation for both men + women w/ Chlamydia = NONE (most Asx)
Complications of Chlamydia
- 3 in men
- 3 in women
Complications of Chlamydia
- Men = epididymitis, prostatitis, proctitis
- Women = endometritis (late PPD), salpingitis, PID
What is the main cause of PID + sterility in women
main cause of PID + sterility in women = Chlamydia
First line tx for Chlamydia
- what 2 things can it cause in infants
- what other infxns/dz can it cause
Chlamydia
- infants –> neonatal conjuctivitis or PNA
- can cause pharyngitis or reactive/aseptic kkarthritis
Chlamydia Tx
- First line tx
- Why can Tetracylines not be used in pregnant women
Chlamydia Tx
- 1st line = 1 g Azithromycin PO x 1
- Tetracyclines CI in pregnancy –> stains babies teeth
What type of organism a/w gram (-) intracellular diplococci
gram (-) intracellular diplococci = Gonorrhea
Transmission of Gonorrhea/in Neonates
- 3 ways to reduce risk (during sex)
- what type of transmission MC
- what dz does it cause in newborns
Transmission of Gonorrhea
- reduce risk w/ condoms, spermicides, diaphragms
- male –> female transmission = MC
- newborns –> conjuctivits
3 Complications of Gonorrhea
3 Complications of Gonorrhea (ascending infxns)
- endometritis
- Salpingitis/PID,
- TOA (tubo-ovarian abscess)
pt presents c/o mucopurulent vaginal d/c, post coital spottin and dysuria. on PE you notice arthritis in knee and painful pustules on skin
Dx (specific)
Dx = disseminated gonococcal dz
Dx + Tx of Gonorrhea
- best way to Dx
- what other Dx test helpful for ruling in Gonorrhea but not good for Chlamydia?
- Tx
Dx + Tx of Gonorrhea
- best way to Dx = NAAT
- Dx test helpful for ruling in Gonorrhea but not good for Chlamydia = Gram stain
- Tx = 250 mg IM Ceftriaxone AND 1 g Azithromycin PO x1
What is the MC cause of PID
MC cause of PID = G/C
Pt presents c/o pelvic/abd pain, dysuria, dyspareunia, N/V, and mucopurulent d/c. On PE pt has fever of 38.5, adenexal tenderness, and CMT. Labs reveal elevated WBCs (19.0) and ESR (20).
Dx?
Dx = PID
Another name for cervical motion tenderness
CMT = Chandelier’s sign
Dx of PID
- what method = gold standard
- What type of agar used for culturing
- 3 main Dx criteria
(hint types of tenderness)
Dx of PID
- PCR/NAAT = gold standard
- Chocolate agar used for culturing
- 3 main Dx criteria
- Abd/pelvic tenderness
- Adnexal tenderness
- CMT
Tx of PID
- what is the outpatient Tx (2 drugs, +/- 1 other)
- What 2 drugs combos (2 drugs each) are inpt Tx
- which is used during preg
Tx of PID
- Outpatient Tx (2 drugs, +/- 1 other)
- IM Ceftriaxone 250mg + Doxycycline 100 mg BID x 14 days
- +/- Metronidazole 500mg BID x 14 days - 2 drugs combos (2 drugs each): inpt Tx
- IV Cefotetan + PO Doxycycline x 14 days
- Gentamicin + Clindamycin (used during preg b/c tetracyclines CI)
Complications of PID
- what are the 2 main long term complications
- Name complication that causes hepatitic fibrosis/scarring –> RUQ pain that may radiate to the R shoulder, incr LFTs and violin string adhesions on liver
Complications of PID
- infertility + ecotopic preg = long term complications
- Fitz-Hugh Curtis Syndrome
- hepatitic fibrosis/scarring –> RUQ pain that may radiate to the R shoulder, incr LFTs and violin string adhesions on liver
PID risk factors
- What type of birth control incr risk of PID
- What type of birth control decr risk of PID
PID risk factors
- IUD –> incr risk
- OCPs –> decr risk
Chancroid
- what organism causes it
- where do ulcers appear on female genitalia
- Cause of chancroid = Haemophilus ducreyi
- gram (-) rod - On females –> vulvar ulcers
Male pt presents w/ single painful, demaracated, non-indurate ulcer w/ inguinal LAD in the angogenital region. Pt states the lesion began as tender papule w/ surrounding erythema. Gram stain shows school of fish pattern
Dx ?
Dx = Chancroid
Tx of Chancroid
what are the 4 Tx options (no dosing)
4 Tx options for Chancroid = “ACCE”
- Azithromycin
- Ceftriaxone
- Cipro
- Erythromycin
What is the systemic form of Chlamydia called that is caused by the L-serotypes of Chlamydia
LGV/Lymphogranuloma Venereum
- systemic form of Chlamydia, caused by the L-serotypes
Pt presents c/o of painful inguinal LNs. Few days earlier pt states they noticed a soft, painless papule/ulcer on their genitalia/rectum that had pus underneath. Pt also noted Sxs of fever, malaise, HA and anorexia. Samples of LNs taken for culture, NAAT and immunofluorescence
Dx?
Tx? (2 ABX options, for how many days)
Dx = LGV (Lymphogranuloma Venereum)
Tx = Doxycycline (100 mg BID) or Erythromycin (500 mg QID) x 21 days
*doses for reference
What disease has the following:
- proctolitis
- rectal stricture
- recovaginal fistula
- elephantasis
- proctolitis
- rectal stricture
- recovaginal fistula
- elephantasis
All characteristic of LGV (tertiary stage)
What organism causes syphilis?
What is the appearance of the organism?
Cause of syphilis = Treponema pallidum
- spirochete (“cork screw” appearance)
Name for the initial lesion of Syphilis
- painless, red, round, firm papule –> ulcer w/raised borders, a/w regional LAD
Initial lesion of Syphilis = Chancre
- PAINLESS, red, round, firm papule –> ulcer w/raised borders, a/w regional LAD
note: Chancroid = painful
Pt presents w/diffuse bilateral maculopapular rash on palms and soles. Some of the papules have coalesced and formed gray-white, greasy plaques that are wart like. On PE you notice enlarged epitrochlear nodes
Dx/stage?
Name for coalesced papules –> gray-white, greasy plaques/wart-like lesions
Dx = Secondary Syphilis
Coalesced papules –> gray-white, greasy plaques/wart-like lesions = Condylomata lata
Four characteristic things seen with/types of tertiary syphilis
Tertiary Syphilis
- Neurosyphilis
- CV Syphilis
- Argo Robertson pupil
- Gummas
Pt presents w/ HA, meningitis signs, dementia, vision/hearing loss, incontinence and ataxia, areflexia, burning pain, and weakness.
What stage/type of syphilis is this
Dx = Neurosyphilis
- stage = tertiary
demyelination of dorsal root ganglia –> ataxia, areflexia, burning pain, and weakness
demyelination of dorsal root ganglia –> ataxia, areflexia, burning pain, and weakness = Tabes dorsalis
a/w Neurosyphilis
What are gummas in tertiary syphilis
Gummas = granulomas on skin and tissues
- Ex: bones
Note: not cancerous
Pt comes in and on PE you note a small irregular pupil that constricts w/ near accommodation but not w/light
- name for this
- what dz is this sign a/w (+ stage)
small irregular pupil that constricts w/ near accommodation but not w/light
- called Argo-Robertson pupil
- a/w Syphilis (tertiary)
CV Syphilis (tertiary)
- name of d/o that causes aortitis, aneuryms, and aortic regurg
CV Syphilis
- Obliterative endarteritis –> aortitis, aneuryms, and aortic regurg
What is the definitive method for dx Syphilis
(can directly visual spriochete)
- used in pts w/ chancre or condylomata lata (primary/secondary)
definitive method for dx Syphilis = dark field examination (microscopy –> directly visual spriochete)
2 Screening tests for syphilis
- test for nontreponemal Abs
Screening tests for syphilis (test for nontreponemal Abs)
- RPR
- VDRL
What is the name of the 2 confirmation tests used for syphilis when a screening test is (+)
FTA-ABS and TPPA
- Confirmation tests used for syphilis when a screening test is (+)
What 2 tests must be performed to dx Neurosyphilis
Dx Neurosyphilis –> LP + VDRL
Tx of Syphilis
- what is the DoC (include dose, route) for primary, secondary or early latent syphilis
- what changes from #1 if late latent syphilis
- what is the only way to tx neurosyphilis
Tx of Syphilis
- DoC = IM PCN G 2.4 million units x 1
- Late latent –> IM PCN G 2.4 million units for 1x/wk for 3 weeks
- Tx neurosyphilis –> MUST do IV PCN G
What if pt has allergy to PCN but has Neurosyphilis
pt has allergy to PCN but has Neurosyphilis
- desensitize pt –> IV PCN G
Pt w/ syphilis treated w/PCN and few hours later pt developed fever, chills, HA, myalgia, malaise, pharyngitis and a rash
Name for this transient, inflam rxn?
Jarisch-Herxheimer Rxn
What types of HPV cause external genital warts (condyloma acuminata) characterized by raised papillomatous or spiked surface
HPV types 6, 11 –> external genital warts (condyloma acuminata) characterized by raised papillomatous or spiked surface
What does HPV types 16, 18, 31, 33, 45 cause
HPV types 16, 18, 31, 33, 35 –> flat warts, cervical CA
The following are tx options for what?
- cryotherapy
- laser ablation
- topical podophyllin
- Imiquimod cream
- 5-FU
- cryotherapy
- laser ablation
- topical podophyllin
- Imiquimod cream
- 5-FU
tx options for HPV
Vaccine for HPV
- name of it
- how many types does it cover
- Age range for administration
Vaccine for HPV
- Gardasil vaccine
- covers 9 types of HPV
- Age range for admin= BOYS + girls age 9 -26