335. Staphylococcus aureus Bacteremia as a Potential and Severe Complication from Intramuscular COVID-19 Vaccine Injection

Abstract Background Abscess formation and bacteremia following intramuscular injections are rare complications from vaccine injections, and they are most commonly seen in immunocompromised individuals. Staphylococcus aureus is one of the etiological agents that can be found during this complication. Spain started to vaccine its population at the beginning of 2021. We noticed an important increase in Staphylococcus aureus infections and bacteremia during this period of time, leading us to study the relationship with previous vaccination. Methods In this case series we present a cohort of twenty patients with Staphylococcus aureus bacteremia (SAB) during the study period (January 1, 2021 through May 31, 2021), attended in our Institution (Hospital Nuestra Señora de Sonsoles, Ávila, Spain). We tried to establish or at least create the debate of a possible relationship with a previous COVID-19 vaccine. Results From January 1, 2021 through May 31, 2021, 20 SAB were identified in our Institution. 13/20 patients were vaccinated (all of them with the mRNA vaccine type). 5/13 (38%) were male and 8/13 (62%) female. 10 of them (77%) received at least one dose of the vaccine before hospital admission, and 3 of them (23%) after admission. From the 10 previously COVID-19-vaccinated patients treated for SAB (CVPSAB), 4 died - 40% (2 deaths directly related to the SAB). Conclusion Although SAB may be a rare side effect after intramuscular injections or vaccines, it always implies an outstanding risk due to potential complications. Even if our study is not able to directly establish a link between SAB and previous vaccination, it implies a possible association between the vaccine injection and a threating disease (SAB). We should be aware of this probable relationship, so that we can maximize preventive measures. Disclosures All Authors: No reported disclosures


Impact of Overall Dexamethasone Exposure on Development of Invasive Pulmonary Aspergillosis in Hospitalized Patients with COVID-19
Erik Skoglund, PharmD 1 ; Amy Kum, PharmD 2 ; Allison Mac, PharmD 1 ; Mark Nguyen, PharmD 1 ; 1 Western University of Health Sciences, College of Pharmacy, Los Angeles, California; 2 Dignity Health, St. Mary Medical Center, Long Beach, California Session: P-14. and Clinical Outcomes Background. Abbreviated courses of corticosteroids, such as dexamethasone, have demonstrated significant improvements in clinical outcomes among patients infected with COVID-19, although chronic corticosteroid use can predispose patients to opportunistic infections. The RECOVERY trial investigators showed reduced 28-day mortality among patients treated with 6 mg/day dexamethasone for up to 10 days, however in clinical practice the dosage and duration of dexamethasone therapy can vary widely based on severity of disease and provider discretion. Upon observing an anecdotal increase in the number of patients presenting with potential invasive aspergillosis during the third wave of COVID-19, we sought to evaluate the impact of overall dexamethasone exposure on the development of invasive pulmonary aspergillosis.

Methods.
Patients presenting to our institution from Dec. 2020 -Jan. 2021 with positive PCR for SARS-CoV-2 were screened for dexamethasone therapy. Assignment of high vs low dose dexamethasone groups were retrospectively made based on overall dexamethasone exposure. Low dose dexamethasone assignment was restricted to a total exposure of no more than 78 mg during a patient's hospitalization. Adjudication of invasive pulmonary aspergillosis was made based on criteria that included host factors, radiologic findings, clinical factors, and mycological evidence.
Results. Dexamethasone therapy was provided to 202 patients admitted to the hospital with COVID-19. Invasive pulmonary aspergillosis was determined to be probable in n=7 patients based on European Organization for Research and Treatment of Cancer (EORTC) criteria, and in n=13 patients based on expanded criteria. Patients in the low dose dexamethasone group were less likely to be diagnosed with probable IPA based on EORTC criteria (n=0, 0% on low dose vs. n=7, 11% on high dose) as well as expanded criteria (n=9, 5% on low dose vs. n=11, 17% on high dose), p< 0.001.
Conclusion. Patients hospitalized with COVID-19 receiving high-dose dexamethasone may be at a higher risk of opportunistic infections such as invasive pulmonary aspergillosis compared to patients who receive low-dose dexamethasone therapy. Further investigation is needed to obtain higher certainty of IPA diagnosis.
Disclosures. Background. Abscess formation and bacteremia following intramuscular injections are rare complications from vaccine injections, and they are most commonly seen in immunocompromised individuals. Staphylococcus aureus is one of the etiological agents that can be found during this complication. Spain started to vaccine its population at the beginning of 2021. We noticed an important increase in Staphylococcus aureus infections and bacteremia during this period of time, leading us to study the relationship with previous vaccination.
Methods. In this case series we present a cohort of twenty patients with Staphylococcus aureus bacteremia (SAB) during the study period (January 1, 2021 through May 31, 2021), attended in our Institution (Hospital Nuestra Señora de Sonsoles, Ávila, Spain). We tried to establish or at least create the debate of a possible relationship with a previous COVID-19 vaccine.
Conclusion. Although SAB may be a rare side effect after intramuscular injections or vaccines, it always implies an outstanding risk due to potential complications. Even if our study is not able to directly establish a link between SAB and previous vaccination, it implies a possible association between the vaccine injection and a threating disease (SAB). We should be aware of this probable relationship, so that we can maximize preventive measures. Background. More accounts of opportunistic infection in COVID-19 patients are emerging. At our institution, we identified 2 COVID-19 patients with Pneumocystis jiroveci pneumonia (PJP) opportunistic infection. This prompted a review of the literature to identify trends in patient characteristics, risk factors, and outcomes in this population.

COVID-19 and Pneumocystis jiroveci Pneumonia
Methods. A literature review was conducted using PubMed that identified 13 other patients with both COVID-19 and PJP infection. Age, gender, human immunodeficiency virus (HIV) status, other immunocompromised states, time between COVID-19 and PJP diagnosis, and clinical outcomes were captured for analysis.
Results. Eleven patients were male. The average age was 56 years. All but 2 patients were immunocompromised. At time of PJP diagnosis, seven patients had newly diagnosed HIV and one had known, well-controlled HIV. One patient had rheumatoid arthritis receiving leflunomide, 1 had ulcerative colitis receiving budesonide and sulfasalazine, 2 patients had multiple myeloma whereby both were on lenalidomide, 1 patient was a renal transplant recipient immunosuppressed on tacrolimus, mycophenolate, and methylprednisolone, and 1 patient had chronic lymphocytic leukemia getting fludarabine, cyclophosphamide, and rituximab. Nine patients had positive COVID-19 and PJP tests performed within 7 days of one another. One patient tested positive for PJP 54 days into admission for COVID-19. This patient received high dose steroids and tocilizumab for initial COVID-19 infection. Three patients were re-hospitalized with PJP after a recent admission for COVID-19 pneumonia, with a mean time to readmission of 25 days. One of these 3 patients had no treatment for COVID-19, while 2 received steroids. Five of the total 15 patients (33%) died.
Conclusion. COVID-19 treatments with high dose steroids and tocilizumab can make patients vulnerable for opportunistic infection with PJP. Furthermore, COVID-19 is known to cause lymphopenia which may further increase this risk. A diagnosis of concomitant PJP can be especially challenging due to nearly identical radiographical findings. Serum beta-D glucan and HIV testing can be especially helpful in this situation, and there should be a low threshold for performing bronchoalveolar lavage.
Disclosures. All Authors: No reported disclosures