Infectious Disease Flashcards
Bacterial Meningitis Causes less than 1 month
GBS, E coli, Listeria
Bacterial Meningitis Causes 3m-10 years
S pneumo
Bacterial Meningitis Causes 10-19 years
Neiserra Meningitis
Bacterial Meningitis Causes Adults
S pneumo > Neiserria > Strep agalactiate
Vancomycin use in Meningitis Treatment
resistant S pneumo
TB Meningitis Presentation
CN 6 palsy
Lyme Meningitis Presentation
CN 7 (facial) palsy
WBC in Bacterial Meningitis
> 1,000
CT Prior to LP if . . .
focal neuro findings, seizure
papilledema
hx CNS disease (include shunt)
immunocompromised
D-test
for S aureus
if erythromycin resistance, than clindamycin resistance for S aureus
Bullous Impetigo
S aureus!, MSSA or MRSA
Most Common Cause of Breast Infections
S aureus
Staphylococcal Scalded Skin Syndrome - symptoms
extensive skin sloughing
+ Nikolsky sign
Pneumonia after Measles
S aureus
Brain Abscess in cyanotic congenital heart disease
S aureus
Staphylococcal Toxic Shock Syndrome - symptoms
generalized erythredema
desquamation 1-2 weeks later, esp palms and soles
Early onset GBS
Birth- 7 days
Sepsis, Pneumonia, Meningitis
Late onset GBS
7d-3 months
Bacteremia, Meningitis
Late, late onset GBS
> 3 onths
usually extremely premature infants w/ bacteremia
Cellulitis-Adenitis Syndrome
late onset GBS
often w/ bacteremia
Cryptosporidum Exposure with Diarrhea Illnesses
contaminated water, livestock, animals in petting zoos
Cause of Liver Abscess in Pediatrics
Entamoeba histolytica
Non nitrite producing UTI organisms
Enterococcus, Staphylococcus, or Streptococcus
First Line Uncomplicated UTI/Cysitis treatment
nitrofurantoin (5 days)
trimethoprim-sulfamethoxazole (3 days)
fosfomycin for 1 dose
UTI/Cysitis Second Line Treatments
beta lactams, cephalosporins > fluroquinolone
First Line Outpatient Pyelonephritis Treatment
fluroquinolones
- 5-7 d uncomplicated
- 10-14 complicated
Who to Treat with Augmentin for Animal Bite Wounds
immunosuppressed including cirrhosis and asplenia
high risk features
Human Bites Management
Augmentin for all bites regardless of other factors
Diabetic Foot Infection Diagnosis
pus + two inflammatory signs (warmth, erythema, induration, pain, tenderness)
Malaria symptoms
fever, myalgias headache, GI symptoms
fever q48-72 hours
Malaria Diagnosis
peripheral blood smears with malarian parasites
Typhoid fever
causes by salmonella
fever, headache, arthralgia, myalgia, pharyngitis, anorexia, abdominal pain with early-onset diarrhea, pulse-temperature dissociation (relative bradycardia), and prostration.
rose spots
secondary infections from bacteremia
Typhoid fever treatment
ceftriaxone, azithromycin, fluroquinolones
dexamethasone in severe disease
Travelers Diarrhea Organism
enterotoxigenic E coli
Travelers Diarrhea Treatment
azithromycin, rifaximin, fluroquinolone
Dengue Fever symptoms
“break bone fever: fever, headache, eye pain, lumbosacral pain
spontaneous bleeding
scalartin rash that develops into petechiae
Finding of Zika virus separating it from dengue and chikunguya
conjunctivitis
chikungunya symptoms
Symptoms of chikungunya resemble dengue fever, including abrupt onset of fever (≥39.0 °C [102.2 °F]) and severe bilateral and symmetrical polyarthralgia, often involving the hands and feet; a maculopapular rash on the limbs and trunk is common.
Meditarrean spotted fever/rickesettal disease
often black eschar at site of tick bite
CAP Outpatient Treatment
doxy or macro or amox
if S pneumo resistance, b-lactam + macro or fluroquinolone
CAP Outpatient Treatment if Cormorbidities
b-lactam (HD amox, 2nd gen cephalosporin) + macrolide
Fluoroquinolone
Repeat CXR In Pneumonia
in 2-3 months for those at high risk
>50 y, smoking history
Clindamycin and Flagyl in Anerobic Infections
Clindamycin- covers GP aneraobes, but limited GN coverage
Flagyl- covers GN anaerobes, but limited against GP
Coxiella Burnetti
zoonooses associated with livestock
Q fever PNA
Treatment duration for uncomplicated PNA in adults
5-7 days
IgA Defieceny
IgA is mucosal barrier- so sinus, pulmonary, GI tract infection class is sinopulmonary tract w/ encapsulated organisms
CVID
- increased risk of infections (resp, GI)
- can have chronic diarrhea 2/2 chronic noro or Giardia
- increased risk of autoimmune disorders
Early Complement Deficiency Immunodeficiencies
C2-C4 deficiencies
increased SLE
increased infection w/ encapsulated organisms
Late Complement Deficiency Immunodeficiency
C5-C9
Recurrent Neisseria Infections
Congenital Infections and Intracranial Calcifications
CMV- periventricular
Toxo- diffuse
Blueberry Rash w/ Congenital Infections
Classic is Rubella, but can be seen with toxo and CMV
Fifth Disease
Parvo, Erythema Infectiosum
Slapped cheeks
arthritis, aplastic anemia
Sixth Disease
HHV-6 Roseola
fever that rashes, fever 3-5 days followed by M to MP rash
Human Bites organism
Eikenella, S aureus
Most common infections w/ GBS by early/late
Early - Sepsis > Pneumonia
Late - Pneumonia > Meningitis
Granulomatosis infantisepticum
Listeria, neonate with erythematous rash w/ papules
brown amniotic fluid
Classic Anthrax Lesion
Painless pruritic papule –> ulcer –> black eschar
Cause of Buccal Cellulitis
H Flu bacteremia
Treatment of Plague
streptomycin or gentamicin
Pseudoappendicitis Syndrome
Yersinia
Yersinia infections more common in …
those with transfusion overload (beta thal, SCD)
Citrobacter bacteremia associated with
brain abscesses!
Tb TST Testing, differences for children
less than 4 = 10mm instead of 15mm
Malassezia infections in pediatrics
1) tinea versicolor
2) catheter associated infections in NICU infants
Spaghetti and Meatballs on slide
Malassezia
Non-TB acid fast organism
Cryptosporidium (oocytes stain acid fast)
Sulfur Belching
Giardia
Congenital Varicella, timeframe for risk
5 days before to 2 days after
Congenital Infection with PDA
Rubella
Influenza Vaccination, two doses needed until
less than age 9
Treatment for Bat Exposure
Rabies Ig + Vaccine
Kaposi Sarcoma
HHV8
painless violet nodules
Letptospiral Meningitis
uveitis, conjunctivitis
severe muscle pains esp in calves
Brain Abscess treatment
focus on causes
Flagyl + 3rd generation cephaloporin or PCN
Subdural Empyema
rapidly progression, NS emergency
treat w/ vanc, flagyl, ceftriaxone
VZV Encephalitis, frequent presentation
Stroke/infarct cerebral arteries
WNV Encephalitis classic presentation
thalamus/basal ganglia - tremors, myoclonus, parksonism
acute flaccid paralysis
variant CJD image findings
hockey stick sign
variant CJD diagnosis
tonsil biopsy
Capnocytophaga carnimorsus
contact w/ dogs
sepsis & cellulitis in asplenic patients
Vibrio vulnificus
cirrhosis or shelling oysters
Rx with ceftriaxone + doxy
Streptococcal Toxic Shock Rx
PCN + clindamycin
Staphylococcal Toxic Shock Rx
naf + clinda
OR
vanc + clinda or linezolid
Lyme Disease stages
1) Early Localized Disease - EM +/- systemic
2) Early Disseminated - Febrile Illness (Cardiac, Neuro)
3) Late Disseminated - Arthritis
Lyme Disease Treatment
Doxy
except Meningitis, Carditis: Ceftriaxone
Ixodes ticks & what illnesses
Lyme, Anaplasma, Babeoiosis
Babesiosis - biggest clinical clues
hemolysis!
matlese cross
Babesiosis - Rx
mild: atovaquone + azithromycin
severe: clinda + quinine
Ehrliciosis & Anaplasmosis
febrile illness
basopihilc inclusion bodies: morulae
RMSF: illness script
macular –> petechial rash, ankles and wrists with central spread
purpura fulminans
Pyelonephritis, if sick/concerend
3rd general cephalosporin versus PCN (Zosyn) vs FQs vs carbapenem
Recurrent UTI Definition
3 in one year or 2 in 6 months
Latent TB
+ IGRA or + TST with NO clinical/radiographic evidence
TST >5mm
very high risk
- HIV+
- recent TB contact
- organ transplant
- immunosuppressed
TST>10mm
increased risk
- healthcare, prisons, health care facilities, homeless
- IVDA
- children less than 4
- recent arrival from endemic country (<5 years)
Izoniazid AE
hepatitis, peripheral neuropathy + DI-lupus
B6/pyridoxine may help
Pyrazinamide AE
hepatitis, hyperuricemia
When to d/c airborne precautions in TB
3 negatives smears or 2 weeks of treatment
Rifampin AE
body fluids orange, hepatitis, drug interactions
Ethambutol AE
optic neuritis
TB Meningitis Treatment
4 drugs + dexamethasone
MAC illness script
old lady with chronic cough, weight loss, night sweats
OR
HIV CD4<50 with disseminated disease
MAC treatment
CLarithyomcyin + EthAmbutol + Rifampin
Mycobacterium Marinum
fish tank exposure/works with fishes
nodular skin lesion + LAD
Mycobacterium Abscessus illness script
purple nodules + chronic abscesses in the young
Treatment of Candidiasis
Micafungin except - UTI - Meningitis - Endopthalmitis Amph B or Azole
Treatment of asymptomatic candiduria
neutropenic pts or undergoing urologic procedure
Forms of Aspergillus
1) Invasive Pulm Asp
2) ABPA
3) Aspergillomas
Invasive Pulm Aspergillosis
pulm tract –> hemat. diss
Rx Voriconazole
ABPA Rx
steroids +/- azole adjunct
Aspergilloma Rx
asymptomatic –> none
symptoms/hemoptysis –> embolization or surgery resection
Mucormycosis Rx
amphotericin
Cryptococcus Rx
amph + flucytosine
Blastomycosis Illness script
SOA, cough
joint pain
painful urination
Blastomycosis Rx
Ampho for severe/pulm
itra for mild
Coccidiodomycosis Types of Illness scripts
1) chronic pulm infection
2) cutaneous infection
3) meningitis
4) MSK infection
Coccidiomycosis Rx
fluconazole
continue for life if meningitis
What infections should you get blood cultures for?
Osteomyelitis
CVID diagnosis
low total IgG
low total IgA or IgM
abnormal Ab responses to vaccines
CVID treatment
IVIG
Anthrax - Clinical Symptoms
black eschar/cutaneous
Atypical PNA like symptoms
hemorrhagic LADitis/widened mediastinum
Anthrax Rx
fluroquinolone or doxy
+ vaccination
Small Pox Illness Script
rash on mucosa, face -> hands –> body
Small Pox Rx
Vaccination, supportive Care
Botulism Illness Script
symmetric described flaccid paralysis
bulbar signs - diplopia, dysarthria, dysphonia, dysphagia
Botulism Rx
early anti-toxin + supportive care
Plague Illness Script
fever, cough, hemoptysis
Plague Rx & PEP
strept or gent
PEP - doxy or levo
Tularemia illness script
highly infectious, PNA
hunter & wild game exposure
Tularemia treatment & PEP
Strep or gent
PEP: doxy or cipro
Brucellosis illness script
- unpast dairy or uncooked meat
- fever, myalgias, HA, fatigue
- depression
Brucellosis Rx
doxy, rifamp, strept
Leptospirosis Rx
doxy (mild) vs PCN/ceftriaxone
Yersinia illness script
acute appendicitis mimicker
EBV PTLD illness script
B-cell proliferation
fever + bulky LAD
Rx is rituximab and reduce immunosuppression