Infectious disease Flashcards
How to reduce surgical site infection
Evaluate for staph aureus nasal carriage 2 weeks before surgery and decolonize if positive (most surgical site infections are due to s. aureus). If positive, patients need preoperative decolonization.
Preoperative antibiotic prophylaxis for surgical site infection
- Cefazolin 1-2 hours before incision (unless MRSA nasal carriage, then vanc)
Coccidoidomycosis clinical features
similar to TB + peripheral eosinophilia + California
Coccidoidomycosis treatment
fluconazole
Empiric CAP treatment in patient requiring ICU
Use agent active against legionella (macrolide or quinolone) instead of atypical coverage
B-lactams
ampicillin-sulbactam
cefotaxime
ceftriaxone
ceftaroline
pseudomonal RF’s
Health care interaction
Previous antibiotic use
Workup of fever of unknown origin
(TB, bacteremia, HIV, abdominal infection) CBC, CMP 3 blood culture sets Urine culture ESR TB testing HIV CT abdomen
Criteria for Fever uf unknown origin
Fever of 100.9 or greater for 3 or more weeks undiagnosed after 2 visits in the ambulatory setting
Leptospirosis clinical features
Hawaii + uveitis + rash + sepsis + LAD + kidney injury + HSM
What is acute retroviral syndrome?
Acute symptomatic illness when patients develop HIV
Management of complicated fulminant (severe) C diff infection
Oral vanc + IV flagyl (reduced absorption)
Severe c diff defined as
serum Cr >1.5 or WBC >15
complicated fulminant c diff defined as
Complicated by ileus, hypotension, shock, or toxic megacolon
Post lyme disease syndrome clinical features
Persistent fatigue + headache + myalgia + arthralgia following lyme disease treatment
hallmark of babesiosis
hemolytic anemia
presentation of late stage lyme disease
inflammatory arthritis involving larger joints
presentation of mycobacterium fortuitum
Chronic, non healing ulcers and wounds that don’t respond to antibiotics
most common cause of pulmonary disease from NTM
MAC (mycobacterium avium complex)
Leprosy clinical features
chronic skin lesions + sensory loss in extremities
PID features
lower abdominal pain + vaginal discharge
Outpatient/ED treatment of PID
Single dose of IM CTX + oral doxycycline for 14 days
Only indications for treating ASB
1) Pregnancy
2) medical clearance before an invasive urologic procedure
Postexposure prophylaxis and testing for person who has needle stick from HIV positive patient (components)
- 3 drug regimen for 1 month
Tenofovir + emtricitabine + either dolutegravir or raltegravir - test immediately, 4-6 weeks later, and 3 months after exposure
management of acute, uncomplicated pyelo with transient bacteremia
Complete oral antibiotic course outpatient
patient groups susceptible to giardia
1) Selective IgA deficiency
* **Preschool
Salmonella features
most common cause of foodborne illness + non bloody diarrhea + self-limited
Listeria clinical features
headache + fever + non bloody watery diarrhea + pain in muscles and joints
How to test for possible Zika exposure
If exposure more than 2 weeks previously, test for IgM antibodies
Most frequent manifestation of Zika in newborne
microcephaly
Management of pregnant woman with proven zika
Serial US q3-4 weeks
What is Ramsay Hunt syndrome + pathogen
Ear pain + vesicular rash in the external ear + ipsilateral peripheral facial palsy + deafness
(reactivation of herpes zoster in the geniculate ganglion)
Problem with live attenuated zoster vaccine
Has 64% efficacy that decreases to 36% after 6 years
Bell palsy clinical features
Isolated paralysis of the facial nerve + complete unilateral facial paralysis
Cause of bell Palsy
HSV 1
Features of Q fever pneumonia
- exposure to livestock/farm animals (farmers, veterinarians, and abattoir workers)
- mild pneumonia
Infection and clinical features associated with chlamydia psitacci infection
- Psittacosis
- PNA associated with abrupt onset of fever + HA + dry cough
- inhalation of dried bird droppings
Clinical features + reservoir of infection due to yersinia pestis
- Pneumonic plague
- rodent exposure
- sudden high fever + pleuritic chest pain + productive cough + hemoptysis + (patients are very very sick)
Antibiotics for an infected cat bite
Unasyn + vanc IF RF’s for MRSA (pus forming) (infections are caused by both organisms from animals mouth flora and the host’s skin flora)
Ehrlichiosis infection clinical features
Febrile illness + leukopenia + thrombocytopenia + elevated liver enzymes
Management of health care-associated ventriculitis (after neurosurgery)
Remove ventricular device
Treatment of disseminated histo
Liposomal amphotericin B
Signs of disseminated histo
Oral ulcerations + hepatosplenomegaly + pancytopenia
empyema diagnosis
thora with purulent or foul-smelling material OR a positive gram stain
organism causing most malaria
Plasmodium falciparum
typhoid fever clinical features
Fever + diarrhea + transient small blanching skin lesions (rose spots)
leptospirosis presentation
Fever + myalgias + HA + conjunctival suffusion (conjunctival injection without exudate)
When you should never use daptomycin
lung pathogens (binds to surfactant)
Initial management of new diagnosis of HIV
- Viral load
- Genotypic viral resistance testing
- Start HAART as soon as patient is ready
Most common causes of meningitis during different seasons
Enterovirus = May-November Winter = HSV-2
CSF findings in viral meningitis
Normal glucose
Lymphocytic pleocytosis (High WBC’s in CSF)
Mildly elevated protein level
Management of patient testing positive for hep B surface antigen + negative for hep B surface antibody
Patient has had HBV infection and would have no benefit from immunization with HBV vaccine
What is neuroborreliosis
sequela of lyme disease due to CNS involvement (nuchal rigidity, headache, facial nerve involvement)
Management of lyme disease with CNS features
LP before treatment
Treatment of neuroborreliosis
parenteral therapy – CTX, cefotaxime or penicillin
Management of anthrax exposure
IF no known direct exposure, no need to test or quarantine (don’t need to separate members of household)
Postexposure ppx for anthrax
ABX for 60 days (cipro, levo, or doxy)
Prep administration and components
Tenofovir + emtricitabine once daily
PREP monitoring
need to check kidney function
Indications for amputation with diabetic foot infections
- persistent sepsis
- not tolerating antibiotics
- progressive bone destruction despite therapy
- bone destruction compromising mechanical integrity of the foot
management of patient with positive treponemal serology and negative nontreponemal test (RPR)
no treatment (this is successfully treated syphilis)
nontreponemal test
RPR
Leading cause of swimming pool-related outbreaks of diarrheal illness
cryptosporidium
How to reduce central line associated infections
- assess daily for continued necessity
- NO routine replacement of central lines
Treatment of cyclospora infection
Oral bactrim
Management of HIV meds in pregnant woman
Continue same regimen
Hep A vaccination protocol
Single injection 2-4 weeks before travel to an endemic region (but single dose at any time before travel provides adequate protection)
management of ESBL UTI
Carbapenems (even if culture suggests some sensitivity to zoey or other antibiotic, this is low sensitivity)
monitoring for daptomycin
Weekly creatinine + CK
should discontinue statin
Cause of kaposi sarcoma
HHV type 8
Treatment for kaposi
ART
Local therapies (RT, intralesional chemo, cryotherapy, retinoids)
Chemo or INF
Treatment of MSSA osteoporosis associated with orthopedic hardware
IF hardware can’t be removed –> Rifampin (synergistic) + anti staphylococcal agent (cefazolin)
When to treat animal bites
- immunosuppressed patients (cirrhotics, asplenia)
- wound with edema
- venous insufficiency
- crush injury
- wound involving joint or bone
- deep puncture wound
- face, genitalia, or hand involvement
Antibiotic used for multi-drug resistant intra-abdominal infection
Ceftolozane-tazobactam and colistine