Infectious Disease
Expert guidance on antimicrobial stewardship, emerging infections, and complex infectious disease management.
Recent Discussions
What approaches can we take to initiate therapy and improve survival rates in patients with HLH?
At our institution, we have comprised a multidisciplinary team to help treat these patients. The team or "HLH task force" as we like to call ourselves is comprised of a clinical immunologist, rheumatologist, dermatologist, critical care physician, hepatologist, BMT attending/hematologist, infectious...
Do you prescribe empiric antibiotics to patients with CAP who test positive for a respiratory virus?
I do not start antibiotics when there is a detected viral etiology. And I tend to stop them if they were started. Obviously, this changes if the symptoms worsen and/or I suspect a bacterial superinfection. Another caveat would be in a patient with underlying COPD where Azithromycin may play a role i...
What are your vaccine recommendations while patients are on biologics?
Live vaccines are best completed at least a month before initiation of biologics when these are appropriate (e.g., MMR, chickenpox, yellow fever). The data on non-live vaccines is limited. I personally think that some degree of protection is better than none. I will not interrupt biological therapy ...
How long do you treat an isolated bacterial liver abscess which has either undergone percutaneous drainage or for which an indwelling drain is placed?
Until it's gone... Percutaneous drainage of liver abscesses is, in my experience, less effective than drainage of intra-abdominal abscesses, which isn't very effective. Neither type of abscess isn't, as I explain to other doctors and pts, a water balloon. Liver abscesses are more complicated than ot...
Do you switch patients living with HIV off of boosted protease inhibitor-based regimens if possible to avoid the increased cardiovascular risk associated with them?
Yes, I usually do, despite my deep respect for PIs, which turned the tide in the United States in the 1990s from a universally fatal condition into a chronic disease. Some studies, most prominently the D:A:D study, suggest that ritonavir-boosted darunavir may increase the risk of CVD; however, other...
Do you routinely give prophylactic antibiotics prior to ERCP for biliary obstruction in light of recent studies suggesting a reduction of periprocedural infection?
I did not use to give antibiotics routinely prior to ERCP, and it seemed post-ERCP antibiotics were given at the discretion of the advanced endoscopist, but the results of this meta-analysis will likely change my practice so that I'll give all patients a dose of Ceftriaxone prior to the procedure to...
Would you consider single dose benzathine penicillin G for treatment of latent syphilis of unknown duration based on recent observational data suggesting non-inferiority of one vs three doses for management of all stages of syphilis, as well as to mitigate issues with adherence, poor follow up, and drug shortage?
Yes. I would now consider a single dose of benzathine penicillin G the treatment of choice for all asymptomatic late syphilis in addition to primary, secondary, and latent syphilis under a year in duration. The 3-dose BPG recommendation always was pretty much data-free, an echo of the early days of ...
What do you think about chronic suppressive therapy for HSV-2 in a patient with positive antibodies but no prior clinical outbreak?
The first challenge is often the reliability of the test result. HSV-2 serologies and their interpretation can be challenging. A strongly positive result for HSV2, i.e., an EIA or similar index value well above the minimal cut-off, usually is reliable. Lesser values often are false positives, even t...
When do you consider PET/CT to evaluate for an occult source of infection in patients with persistent bacteremia if TTE/TEE does not show evidence of endocarditis?
Great question. Generally, I consider PET/CT to evaluate for an occult source of infection in patients with persistent bacteremia if TTE/TEE does not show evidence of endocarditis, in the following scenarios: Persistent bacteremia ≥72 hours. TEE was negative or nondiagnostic. No source identified o...
Under what circumstances would you initiate antibiotics in adults hospitalized with RSV and a suspected bacterial co-infection?
Bacterial co-infection in patients hospitalized with RSV ranges between 8% and 29% (Karlsen et al., PMID 41488696). The American Thoracic Society 2025 guidelines recommend prescribing empiric antibiotics to all hospitalized patients with clinical and imaging evidence of community-acquired pneumonia ...