Infectious Disease
Expert guidance on antimicrobial stewardship, emerging infections, and complex infectious disease management.
Recent Discussions
Do you continue PJP prophylaxis indefinitely in patients on rituximab maintenance therapy?
Risk for PJP infection is usually in the context of moderate-high dose corticosteroid therapy or low T cell counts.
In a patient with negative Hep B surface Ag, Hep B surface antibody+, and Hep B core antibody+ serologies, do you initiate antiviral prophylaxis (e.g. entecavir) prior to starting rituximab?
I would use entecavir for Hep B reactivation prophylaxis in this case - based on recommendations from AGA 2025 guidelines, which does classify b-cell depleting agents as higher risk for reactivation for both Hep B surface Ag-positive and Hep B surface Antigen neg/core positive patients. It should be...
What clinical criteria do you use to decide whether to continue intravenous gentamicin or fluoroquinolone for the full duration of treatment or to step down to oral therapy in hospitalized patients with tularemia?
There are no prospective, controlled trials for the treatment of tularemia. I am comfortable in treating mild-moderate infections with a PO quinolone. In severe infections (meningitis, endocarditis, extensive pneumonia, etc.), I would definitely start parenterally and step down to an oral regimen wh...
Do you use combination therapy for persistent MSSA bacteremia?
I don’t think I’ve ever come across a situation where the problem wasn’t source control…
Do you add adjunctive gentamicin and/or rifampin for treatment of prosthetic valve Staphylococcus aureus endocarditis?
No, we do not add adjunctive gentamicin for treatment of Staphylococcus aureus (SA) prosthetic valve endocarditis (PVE). The potential benefit of using an aminoglycoside in this setting is minimal, if any, and is outweighed by the risk of toxicity.With respect to using rifampin, it depends on whethe...
Should patients starting cyclophosphamide be screened routinely for latent tuberculosis (TB)?
Yes, I think patients starting Cyclophosphamide should be screened routinely for latent TB since CYC is a strong immunosuppressant and increases the risk of TB reactivation. The issue is that CYC is often being considered for life or organ-threatening situations, for which it may not be ideal to wai...
Do you routinely order karius in evaluation of culture negative prosthetic valve endocarditis?
Don’t “routinely” order Karius test. Rarely, in culture-negative suspected endocarditis, especially if a prosthetic valve is present. Once for suspected culture-negative aortic graft infection. 3x for culture-negative meningitis. Likely to become more frequent but adoption very dependent on cost an...
Do you consider holding PPIs in patients hospitalized with infections like pneumonia or C. diff colitis?
My practice is to try to get patients off PPIs if at all possible, and the hospital can be a good time to have that conversation with them. This is assuming no active indication for them (recent ulcer/upper GI bleed, H.pylori therapy, etc.) Use of PPIs has been associated with a higher incidence of ...
Do you recommend routine neurosyphilis testing in patients being evaluated for dementia?
Syphilis is a rare cause of dementia without other evidence of neurological disease, at least in the US and most other industrialized countries. Of course, a careful neurological examination is required for all dementia patients, but the absence of other manifestations of neurosyphilis makes testing...
Do you routinely treat patients with neurosyphilis with IM penicillin for 1-3 weeks after completing a full treatment course of IV penicillin?
The same question was asked almost exactly two years ago. Repeating the same reply with minor edits: This has been a topic of a debate among syphilis experts for decades. There are no data at all on whether there is benefit (e.g. in preventing later relapse) in adding low-dose but long-acting penici...