Infectious Disease
Expert guidance on antimicrobial stewardship, emerging infections, and complex infectious disease management.
Recent Discussions
How would you approach management of multidrug resistant Streptococcus mitis bacteremia in a patient with prolonged neutropenia and prior severe allergic reaction to vancomycin?
I think it depends on what it is sensitive to. Fluoroquinolones might be an option. Linezolid might be an option.
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 ...
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...
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...
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 ...
How do you evaluate for an ascending UTI in a patient with a urostomy?
Evaluating for ascending UTI in a patient with a urostomy UA Generally low value; chronic pyuria/mucus makes results unreliable. Urine culture Essential; must be collected from a clean stoma catheterization or a fresh pouch, and not from the urostomy bag. Imaging (CT abdomen and pelvis wit...
Under what circumstances do you consider valacyclovir for the management of VZV disease of the CNS?
If the patient has encephalitis would use IV acyclovir and only transition to high dose valcyclovir (2 g every 8 or every 6 hs depending on weight) after improvement. Although there is PK data to support these high doses, I would not use it initially. Immunosuppressed patients have a higher likeliho...
What is your approach to antiviral treatment of HSV acute retinal necrosis?
Acute Retinal Necrosis (ARN) is a rapidly progressive syndrome usually caused by varicella-zoster virus (VZV)and herpes simplex virus 1 or 2 (HSV). The syndrome is rapidly progressive in the absence of antiviral treatment. PCR performed on aqueous or vitreous sampling is highly sensitive and strongl...