987. Clinical Epidemiology and Outcomes of Invasive Pulmonary Aspergillosis as a Complication of Respiratory Viral Infection in Hospitalized Patients

Abstract Background Invasive pulmonary aspergillosis (IPA) is increasingly recognized as a complication of severe respiratory viral infections (RVIs), including influenza and COVID-19. However, the incidence and outcomes of IPA following other RVIs is not well-described. We hypothesized that IPA may be an underreported complication of non-influenza RVIs. The objective of this study was to quantify the incidence and associated outcomes of IPA following RVI in hospitalized patients. Methods We conducted a single-center retrospective cohort study of adult hospitalized patients with RVI diagnosed by multiplex PCR-based assay at the University of Kansas Hospital (Kansas City, Kansas) from September 2018-October 2019. Patients with a diagnosis of proven or probable IPA prior to RVI and those with hospital admission < 24 h were excluded from analysis. Proven or probable IPA was defined according to EORTC/MSGERC consensus definitions. The primary outcome was 1-year all-cause mortality. Results A total of 195 patients met study criteria and were included in the analysis. The most common types of RVI observed were rhinovirus/enterovirus (57.9%, n=113), parainfluenza (13.3%, n=26), influenza (8.2%, n=16), and respiratory syncytial virus (7.7%, n=15). The cumulative incidence of IPA infection within 6 weeks of RVI was 5.6% (n=11). Excluding patients co-infected with multiple respiratory viruses (n=5), IPA was numerically more likely to occur following influenza compared to non-influenza RVI (12.5% [ n=2/16] vs. 4.6% [n=8/174]; odds ratio, 2.96; 95% confidence interval [CI], 0.57-15.3; P=0.176). Overall, one-year all-cause mortality was 20% (n=39/195) in this cohort. Development of IPA as a complication of RVI was associated with a significant decrease in 1-year survival (hazard ratio [HR], 3.04; 95% CI, 1.19-7.78; P=0.021), and this relationship persisted after adjustment for age (HR, 2.77; 95% CI, 1.08-7.10; P=0.034). Conclusion In a cohort of hospitalized patients with RVI, 5.6% of patients developed proven or probable IPA. Although IPA was more likely to occur in patients with influenza, this complication was also observed with other types of RVI. Invasive pulmonary aspergillosis may be an underappreciated complication of non-influenza RVI in hospitalized patients and warrants continued study. Disclosures All Authors: No reported disclosures

The table describes risk factors for 30-day mortaity for fusarium infections in patients with hematological malignancies. statistical analysis done using fischer's exact test Conclusion. Fusarium infections result in morbidity and mortality in patients with hematological malignancies. A variety of host and disease factors dictate eventual outcome of Fusarium infections in these patients. Lack of neutrophil recovery is a significant risk factor for 30-day mortality in this population.
Disclosures. Background. Acute myeloid leukemia (AML) is associated with poor prognosis, particularly in elderly patients with co-morbidities. Low-intensity therapies like azacitidine (aza) were the standard of care and were associated with low response rates and limited survival. Combining venetoclax (ven) with aza demonstrated significant improvements in responses and survival compared to aza alone, and represents the new standard of care for this population. However, as a myelosuppressive regimen, infectious complications, especially invasive fungal infections (IFI), are a potential concern. The incidence of IFI and the role for antifungal prophylaxis have not been well defined for newly-diagnosed AML patients receiving ven/aza.
Methods. We conducted a retrospective cohort review of AML patients treated with ven/aza at the University of Colorado Hospital from January 2014 to August 2020. Duration of therapy was defined as the time from initiation of treatment through one of the following endpoints (1) patient discontinuation, (2) progression of disease, (3) bone marrow transplantation, or (4) death. Four patients with a history of prior IFI were excluded. We assessed the impact of patient age, sex, duration of neutropenia, antifungal prophylaxis, and AML specific risk factors on the incidence of IFI as defined by the European Mycoses Study Group.
Conclusion. The incidence of IFI in our AML cohorts treated with ven/aza was 17%, lower than that reported at other institutions. Neutropenia > 60 days was significantly associated with IFI in our AML cohort treated with ven/aza. Although we were not powered to determine whether antifungal prophylaxis impacted IFI, there was no significant difference in IFI for patients who received prophylaxis.
Disclosures. All Authors: No reported disclosures Background. Invasive pulmonary aspergillosis (IPA) is increasingly recognized as a complication of severe respiratory viral infections (RVIs), including influenza and COVID-19. However, the incidence and outcomes of IPA following other RVIs is not well-described. We hypothesized that IPA may be an underreported complication of non-influenza RVIs. The objective of this study was to quantify the incidence and associated outcomes of IPA following RVI in hospitalized patients.

Clinical Epidemiology and Outcomes of Invasive Pulmonary Aspergillosis as a Complication of Respiratory Viral Infection in Hospitalized Patients
Methods. We conducted a single-center retrospective cohort study of adult hospitalized patients with RVI diagnosed by multiplex PCR-based assay at the University of Kansas Hospital (Kansas City, Kansas) from September 2018-October 2019. Patients with a diagnosis of proven or probable IPA prior to RVI and those with hospital admission < 24 h were excluded from analysis. Proven or probable IPA was defined according to EORTC/MSGERC consensus definitions. The primary outcome was 1-year all-cause mortality.
Results. A total of 195 patients met study criteria and were included in the analysis. The most common types of RVI observed were rhinovirus/enterovirus (57.9%, n=113), parainfluenza (13.3%, n=26), influenza (8.2%, n=16), and respiratory syncytial virus (7.7%, n=15). The cumulative incidence of IPA infection within 6 weeks of RVI was 5.6% (n=11). Excluding patients co-infected with multiple respiratory viruses (n=5), IPA was numerically more likely to occur following influenza compared to non-influenza RVI ( Conclusion. In a cohort of hospitalized patients with RVI, 5.6% of patients developed proven or probable IPA. Although IPA was more likely to occur in patients with influenza, this complication was also observed with other types of RVI. Invasive pulmonary aspergillosis may be an underappreciated complication of non-influenza RVI in hospitalized patients and warrants continued study. Disclosures. Background. Candidemia is the second most common cause of healthcare-associated bloodstream infections in the US with mortality of approximately 25%. Studies demonstrate lower candidemia mortality with infectious diseases consultation (IDC). We evaluated effects of IDC on mortality and guideline-adherence at our institution to determine if mandatory IDC was warranted.
Methods. We retrospectively reviewed adults hospitalized with candidemia (≥ 1 blood culture positive for Candida) between 1/1/2016-12/31/2019. Exclusion criteria included age < 19 years, polymicrobial blood culture, or death or hospice within 48 hours. Primary outcome was all-cause 30-day mortality. Secondary outcomes included guideline-adherence and treatment choice. Guideline-adherence was assessed with a modified EQUAL Candida score (Table 1). Descriptive statistics were performed.