Infectious Disease
Expert guidance on antimicrobial stewardship, emerging infections, and complex infectious disease management.
Recent Discussions
What factors do you consider when deciding between monotherapy with an antipseudomonal cephalosporin and combination therapy in ICU patients with Pseudomonas aeruginosa bloodstream infection who are not in septic shock?
In a patient who is critically ill, combination therapy can be used if there is concern that there may be a drug-resistant organism. In that case, a combination regimen can be used while awaiting the susceptibility test results. The combination choice should be based on the resistance patterns of th...
Do you switch to an alternative agent for C difficile colitis for a patient with suspected infection and positive testing who continues to have >3 watery bowel movements daily despite multiple days of oral vancomycin treatment?
The question about switching to another agent for Clostridioides difficile (Cdif) colitis in a patient who tests positive for Cdif but continues to have diarrhea despite multiple days of oral vancomycin treatment does not include any information regarding the clinical status of the patient, the pres...
What agent and for how long would you treat a patient with asymptomatic azole-resistant C auris candiduria who is planning to undergo a urological procedure?
I would be cautious here. If there are reasonable MICs to fluconazole (SDD but achievable), this would be preferred. Intravesical amphotericin is a good option. But, if this were impossible to achieve, I would be reluctant to use IV amphotericin in any formulation, since there's a risk of harm, and ...
What is your preferred agent for fungal prophylaxis in a patient post lung transplant with abnormal LFTs?
Isavuconazonium tends to cause less elevations in LFTs.
How do you manage resistant infections that persist after stopping antibiotic therapy in patients with non-CF bronchiectasis?
It depends on what is meant by resistant infections; if this means multi-drug resistant bacteria that remain present after treatment ends and when symptoms have returned to baseline, there are many things to consider. First, has the person had many exacerbations before? Or do they have minimal sympt...
For a patient on appropriate treatment for invasive aspergillosis, how do you determine if and when it is acceptable to reintroduce a TNF inhibitor that likely contributed to their acquisition of the infection but is considered essential for control of their inflammatory condition?
There is no established answer to this question. The reintroduction of a TNF inhibitor must be individualized based on the clinical situation of the patient under consideration. There are two critical questions. First, how much does the patient need the inhibitor”? The more the patient is dependent ...
Do you adhere to the standard 5-day minimum treatment duration for community-acquired pneumonia, or have you used shorter courses for certain low-risk patients?
This is a question addressing a shorter duration of antibiotic therapy than the current IDSA guidelines for community-acquired pneumonia (CAP) recommend. It has been the topic of several studies, for example, 3-day treatment (Richard T. Ellison III, MD, reviewing Dinh et al., PMID 33773631; Niederma...
Is there a specific criteria that you use to determine if a patient with respiratory symptoms should have a multiplex respiratory test performed?
If the patient is being admitted to the hospital, the information provided by this test can be useful with regards to antimicrobial stewardship (potentially avoiding antibiotic therapy or targeting it) and also with regards to infection control precautions. For outpatient scenarios, if respiratory s...
How do you integrate next-generation sequencing with traditional culture methods to improve the identification of fungal pathogens, especially in cases where routine cultures are negative when evaluating suspected prosthetic joint infections?
To my knowledge, there is no evidence that molecular studies improve the detection of fungal pathogens in periprosthetic joint infections. The vast majority of fungal PJIs are caused by Candida species, while mold infections are rare and typically diagnosed through fungal cultures. If a PJI remains ...
Do you add gentamicin when treating prosthetic valve endocarditis secondary to viridans group Streptococcus with a penicillin-intermediate isolate (MIC >0.125 - <0.5)?
No, we do not treat patients with such infections with a combination of penicillin and gentamicin. For these infections, we treat with ceftriaxone alone. Monotherapy with ceftriaxone is a more reasonable option than a combination of penicillin and gentamicin because we have every reason to consider ...