Exam 2 - Zoonoses and GU infections Flashcards
dysuria definition
burning/tingling/stinging of urethra and meatus associated with voiding
most common cause of dysuria in women
acute cystitis
acute cystitis mimics
vaginitis, prostatitis, STIs, derm conditions, allergies, hormonal conditions, bladder cancer
anatomic abnormalities predisposing to UTIs
hypospadias, BPH, vesicoureteral reflux, polycystic kidney disease
what is a complicated UTI
everything except simple cystitis in a healthy non-pregnant woman
confounding factors in urinalysis
unclean catch, dilute urine (first morning urine is the best), AZO treatment
major way to estimate gram + vs gram - UTI from urinalysis
gram negative will have nitrites, gram positive will not
major way to determine contamination in urinalysis
presence of moderate-numerous squamous cells
clues to UTI on urinalysis
cloudy color, presence of blood/protein, leukocyte esterase, WBCs, RBCs, bacteria, nitrites
most common UTI pathogen
e coli
which UTI pathogen is associated with struvite stones
proteus
risk factors for pseudomonas uti
chronic catheter, hospitalized patients
risk factors for enterococcus uti
debilitated/hospitalized patients
risk factors for group b strep (agalactiae) uti
diabetes
risk factor for staph saprophyticus uti (coagulase negative)
young, sexually active women
mechanism and pathogen in descending UTIs
staph aureus, hematogenous spread to kidneys
when to treat asymtpomatic bacteriuria
pregnant women, before invasive urologic procedures
simple cystitis ssx
frequency, urgency, dysuria, suprapubic pain, hematuria
pyelonephritis ssx
simple cystitis plus CVA tenderness, fever, flank pain, N/V
simple cystitis tx
nitrofurantoin, cephalexin, bactrim, cipro
pyelonephritis tx
empiric coverage for suspected GNR, consider pseudomonas if hospitalized patient
which STI cannot use PCR for diagnosis and what does it use instead
treponema pallidum, dark field microscopy or RPR/VDRL
gonorrhea morphology
gram negative diplococci
chlamydia morphology
intracellular gram negative rods
trichomonas morphology
parasite - flagellate
BV pathogen
gardnerella vaginalis
gardnerella vaginalis morphology
gram variable rod
candida albicans morphology
budding yeast
treponema pallidum morphology
spirochete
which STI is characterized by clue cells on wet mount
gardnerella (BV)
what does the vaginal pathogens panel consist of?
candida, BV, trichomonas
treatment for gonorrhea
ceftriaxone 500 mg IM x 1 and azithromycin 1 gram PO x 1
treatment for chlamydia
doxycycline x 7 or azithromycin x 1 and ceftriaxone x 1
treatment principle for gonorrhea/chlamydia
treat for co-infection with both organisms
gonorrhea sequelae
PID, neonatal conjunctivitis, bacteremia, septic arthritis, tenosynovitis
chlamydia sequelae
PID, conjunctivitis, trachoma, ectopic pregnancy, chronic pelvic pain, infertility, reactive arthritis
causes of prostatitis
bacteria leaking into prostate gland from urinary tract, direct extension/lymphatic spread from rectum, STIs
prostatitis ssx
dysuria, urinary hesitancy/urgency, painful ejaculation, abd/groin/low back pain
epididymitis causes
UTI/STI
epididymitis ssx
swollen, red, warm scrotum, testicle pain/tenderness of gradual onset
balanitis definition
inflammation of the glans penis most common in uncircumcised men
balanitis causes
candida, irritation from soaps
treatment principle for prostatitis/epididymitis
in younger sexually active males, screen and treat for gonorrhea/chlamydia. In older males suspect UTI organisms
prostatitis/epididymitis treatment
cipro or bactrim x 1-2 weeks
why is cipro often used for prostatitis
it can achieve high concentrations in prostate
non-infectious causes of vaginitis
atrophic (post menopausal), allergies to condoms/spermicides/washes
most common vaginitis pathogens
candida, bacterial vaginosis pathogens, trichomonas
vaginitis treatment challenge
if due to BV, pathogens form biofilm leading to high rates of recurrence
candida vaginitis tx
monistat cream or PO diflucan
bacterial vaginosis ssx
vaginal pain/itching, dyspareunia, thin grayish milky discharge, fishy odor
trichomonas ssx
vaginal itching/pain, thin grayish frothy discharge
bacterial vaginosis diagnosis
PCR, clue cells on wet mount
trichomonas diagnosis
PCR, moving protozoa on microscopy
BV/trichomonas tx
PO metronidazole, vaginal metronidazole, vaginal clindamycin
syphilis tx
PCN
non-treponemal antibody detection
RPR, VDRL: Quantitative, titers go down with treatment, false positives and negatives
treponemal antibody detection
TPPA, MHA-TP, FTA: Qualitative, stays positive for life, more specific than non-treponemal
stages of syphilis
primary, secondary, latent, tertiary
primary syphilis timeline and characteristics
2-3 weeks after infection, chancre at entry site, regional lymphadenopathy, serology may or may not be positive
secondary syphilis timeline and characteristics
6-12 weeks after infection: rash, joint pain, hepatitis, general lymphadenopathy
latent syphilis characteristics
positive blood test with no ssx
tertiary syphilis characteristics
CNS damage, aortitis, gumma
when does neurosyphilis occur
can happen at any stage
how is congenital syphilis transmitted
through placenta
genital ulcers differential diagnosis
HSV II, syphilis, chancroid, HPV, Behcet’s, drug reaction
HSV II ssx
painful vesicular lesions
chancroid ssx
painful necrotic lesions
chancroid pathogen
haemophilus ducreyi
HPV ssx
wart-like lesions
Behcet’s ssx
sores in mouth and genitals
HSV II tx
acyclovir
chancroid tx
azithromycin, ceftriaxone
HPV tx
imiquimod, condylox
Behcet’s tx
prednisone, immunosuppressants
how long to refrain from sexual activity after STI treatment initiation
7 days
major diagnosis principle for STIs
always evaluate for other STIs including HIV
zoonoses definition
infections normally found in non-humans that may infect humans
when to consider zoonoses
fever of unknown origin with recent travel history
differential for fever within one week of return from African, South America, SE Asia
malaria, dengue, chikungunya, zika, yellow fever
zoonoses from cats
pasteurella, bartonella
pasteurella morphology
small gram negative coccobacilli
pasteurella ssx
acute onset of cellulitis, lymphangitis, purulent drainage from wound 12-24 hours after bite/scratch
pasteurella tx
surgical drainage and PCN
Bartonella morphology
fastidious, slow-growing GNR
bartonella diagnosis
PCR, lymph node culture
bartonella mechanism
transmitted to cat via infected flea
pasteurella mechanism
normal oral flora in cats and dogs
bartonella ssx
fever, fatigue, swollen lymph nodes
bartonella tx
self-limiting, can use azithromycin or PCN
rickettsial infections morphology
very small, usually intracellular bacteria
rickettsial infections tx
doxycycline
rickettsial infections ssx
fevers, HA, rash, tache noire (eschar)
most important rickettsial infection
rocky mountain spotted fever
RMSF pathogen
rickettsia rickettsii
RMSF geographic distribution
US (NC, OK, TN, Arkansas, Missouri), Canada, Mexico, Central America, Brazil
RMSF vector
American dog tick
RMSF ssx
fever, HA, abd pain, maculopapular rash or petechiae that begins on wrists/ankles and progresses towards the trunk - can be seen on palms and soles
RMSF diagnosis
serology, skin biopsy
RMSF treatment
doxycycline, chloramphenicol
rickettsialpox pathogen
rickettsia akari
rickettsialpox ssx
fever, HA, papulovesicular rash
rickettsialpox vector
mouse mites
rickettsialpox tx
doxycycline
granulocytic anaplasmosis pathogen
anaplasma phagocytophilum
cells affected by granulocytic anaplasmosis
granulocytes (neutrophils, eosinophils, basophils
granulocytic anaplasmosis vector
ixodes tick
granulocytic anaplasmosis geographic distribution
upper midwest, New England, northeast Atlantic states
granulocytic anaplasmosis ssx
fever, myalgias, HA, GI ssx, no rash
granulocytic anaplasmosis tx
doxycycline
cells affected by monocytic ehrlichiosis
blood monocytes, tissue phagocytes
monocytic ehrlichiosis vector
lone star tick (amblyomma)
monocytic ehrlichiosis geographic distribution
Midwest, coastal Atlantic states
monocytic ehrlichiosis ssx
same as anaplasmosis except 1/3 of patients have rash
monocytic ehrlichiosis tx
doxycycline
monocytic ehrlichiosis vs anaplasmosis on blood smear
anaplasmosis: often see morulae. Ehrlichiosis: rarely see morulae
Q fever pathogen
coxiella burnetti
Q fever reservoirs
sheep, cattle, goats (placental tissue, feces, urine)
Q fever transmission
inhalation, unpasteurized dairy, tick bite (rare)
Q fever ssx
acute or chronic: fevers, chills, myalgia, HA, GI symptoms, chest pain
Q fever sequelae
culture negative endocarditis, pneumomia, hepatitis, aneurysms, CNS
Q fever tx
doxycycline
Plague pathogen
yersinia pestis
plague vectors
fleas, prairie dogs, rock squirrels, cats/dogs
plague morphology
gram negative coccobacilli with safety pin appearance
plague diagnosis
culture, antibody test
plague presentation
buboes, pneumonic
plague season
spring, summer, fall
plague treatment
doxycycline, cipro
plague geographic distribution
Western US, especially NM
Hantavirus geographic distribution
Four corners NM
Hantavirus mechanism
inhalation of deer mouse feces
Hantavirus ssx
flu-like ssx one week after contact +/- severe respiratory distress
Hantavirus diagnosis
> 10% immunoblasts on blood smear, antibody test
hantavirus season
spring, early summer
hantavirus treatment
supportive care, ECMO
west nile geographic distribution
continental US
West nile vectors
mosquitoes, dead birds
west nile ssx
flu-like, meningitis/encephalitis, paralysis
west nile diagnosis
IgM serology
west nile treatment
supportive
rabies animals
bats, racoons, skunks, cats/dogs, etc
rabies tx
rabies vaccine, immunoglobulin
rabies ssx
cerebral dysfunction, anxiety, AMS, usually fatal if ssx develop
rabies diagnosis
PCR, antibody testing
tularemia geographical distribution
hunting areas, Arkansas
tularemia risk factor
hunting and skinning rabbits
tularemia vectors
lone star tick, deer fly
tularemia ssx
glandular, oropharyngeal, pneumonic
tularemia diagnosis
PCR, fluorescent antibody stain, culture
tularemia morphology
gram negative coccobacilli
tularemia season
summer, fall
tularemia tx
doxycycline, cipro
Dengue geography
tropical regions
dengue vector
mosquito
dengue ssx
bleeding, jaundice, elevated LFT/creatinine
dengue diagnosis
PCR
dengue treatment
supportive
brucellosis risk factors
immigrants, ranchers, slaughterhouse/meat packing workers, hunters, vets
brucellosis animal
ungulate and farm animals (horses, cattle, pigs, goats)
brucellosis ssx
flu-like
brucellosis diagnosis
serology
brucellosis morphology
gram negative coccobacilli
brucellosis season
spring/summer
brucellosis tx
doxycycline, cipro
lyme disease pathogen
borrelia burgdorferi
lyme disease geographic distriubtion
northeast, upper midwest
lyme disease vector
deer tick (ixodes scapularis)
lyme disease ssx
erythema migrans, bell’s palsy
borrelia burgdorferi morphology
spirochete
lyme disease diagnosis
serologies
lyme disease tx
doxycycline
lyme disease season
summer/early fall