Infectious Disease
Expert guidance on antimicrobial stewardship, emerging infections, and complex infectious disease management.
Recent Discussions
What is your preferred oral regime with duration for treatment of onychomycosis?
My new favorite regimen is: terbinafine 500 mg once daily for one week, then take 3 weeks off. Repeat for 4, once weekly cycles. Sprenger et al., PMID 31487828
How long would you hold antibiotics before performing a vertebral biopsy to optimize culture yield in a patient who has been on empiric antibiotics for a week for suspected vertebral osteomyelitis?
I would devote my efforts to obtaining a sample for WGS or other molecular technology and (briefly) delay sampling until an administrative route has been identified. If absolutely not available, antibiotics delay would depend on a) clinical status of the patient and b) tissue T1/2 of antibiotics adm...
Do you routinely recommend transition to dual PO antibiotic coverage for strep species and MRSA, for patients with purulent cellulitis and in the absence of culture data?
I use mostly Linezolid because: It’s now much cheaper. Even if on serotonin drugs, I can half the serotonin dose while they are on it. Covers pretty much all Strep and Staph, including MRSA. Protein synthesis inhibition may reduce toxins (like clinda in Strep fasciitis). There is no renal dose adju...
Can you safely use a cephalosporin in a patient who previously developed acute interstitial nephritis to amoxicillin?
Amoxicillin-associated interstitial nephritis is most often a type IV hypersensitivity reaction. Cross-reactivity with other beta-lactams is possible but poorly studied. I would try hard to find an alternative.
What is your preferred first-line regimen to treat a severe or fulminant C difficile infection?
IV vancomycin and PO Flagyl are the easiest combination to get for a hospitalized patient. I’ve had much experience with this, and it works very well. IV vancomycin and PO Flagyl as initial treatments in the hospital is my preference. This is before I go onto stronger drugs, with those requiring al...
How would you manage a patient with strongly suspected Lyme arthritis and negative bacterial synovial fluid cultures who was started on empiric antibiotics against typical bacterial pathogens arthritis before arthrocentesis and collection of cultures?
In a patient with a high clinical suspicion for Lyme arthritis who has negative synovial fluid bacterial cultures after receiving empiric antibiotics for presumed septic arthritis, management should be guided by clinical probability rather than the culture results. Antibiotics given before arthrocen...
Do you treat diabetic foot osteomyelitis without surgical resection with a fixed 6-week antibiotic course, or do you shorten duration based on clinical and inflammatory marker response?
The real key factor in successfully treating diabetic foot infections is adequate debridement (and sometimes amputation, like TMA) in the setting of infected bone. We have excellent Podiatrists at our County Hospital and VA, and foot/ankle and vascular surgeons at our University Hospital. You can't ...
How long do you treat Staphylococcus aureus pyomyositis with antibiotics?
I agree, and certainly evaluating for bacteremia that can be associated with these types of infections, which would alter the duration of therapy.
How do you typically manage a patient with a single positive blood culture from two sets growing Candida species in a stable patient without prosthetic devices or material?
Candidemia is defined as the presence of Candida species in the blood, and even a single positive blood culture specimen is considered significant and warrants treatment as candidemia. Initial management should include: Initiating antifungal therapy with an echinochandin (micafungin, capsofungin, o...
What is your approach to management of patients with recurrent orolabial herpes?
Recurrent orolabial herpes is fundamentally a disease of viral latency with episodic reactivation, so my approach focuses less on “treating infection” and more on reducing recurrence burden, shortening symptom duration, and improving quality of life. First, I make sure we are actually dealing with H...