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Alyssa Y Castillo

TitleAssistant Professor
InstitutionUniversity of Colorado Denver - Anschutz Medical Campus
DepartmentSOM-MED
    Other Positions
    TitleDirector-Faculty
    InstitutionUniversity of Colorado Denver - Anschutz Medical Campus
    DepartmentSOM-MED
    DivisionInfectious Disease


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    Publications listed below are automatically derived from MEDLINE/PubMed and other sources, which might result in incorrect or missing publications. Faculty can login to make corrections and additions.
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    1. Seibert AM, Hersh AL, Willis P, Nelson B, Bledsoe J, Patel PK, Buckel W, Olson JA, Fino N, Stanfield V, Castillo AY, Frost HM, Stenehjem EA. Check Engine Light, Red Herring, or MacGuffin? Clinician-Level Correlations of the Antibiotic Utilization for Respiratory Conditions (AXR) Metric With Outpatient Antimicrobial Stewardship Metrics, Diagnostic Practices, and Prescription Characteristics. Clin Infect Dis. 2026 Jun 03. PMID: 42234479.
      View in: PubMed
    2. Castillo AY, Jenkins TC, Axelrath S, Barocas JA. Street Stewardship: The next frontier to address antibiotic resistance and health inequities. Clin Infect Dis. 2026 Mar 21. PMID: 41861843.
      View in: PubMed
    3. Mitaka H, Brade K, Castillo AY. Underdosed and Underappreciated: Why Japanese Community-Acquired Pneumonia Outcomes With Ampicillin-Sulbactam May Not Translate Globally. Open Forum Infect Dis. 2025 Jul; 12(7):ofaf348. PMID: 40599487.
      View in: PubMed
    4. Hartlage W, Castillo AY, Kassamali Escobar Z, Bajenov M, Martinez-Paz N, Lynch JB, Bryson-Cahn C, Chan JD. Stewarding the inappropriate diagnosis and treatment of urinary tract infection: leveraging the urinalysis to understand true antibiotic overuse. Antimicrob Steward Healthc Epidemiol. 2025; 5(1):e49. PMID: 40026777.
      View in: PubMed
    5. Castillo AY, Frost HM, Poole NM, Jenkins TC, Seibert AM, Stenehjem E. Implementing with intention: advantages, challenges, and tactics to optimally utilize the AXR metric. Antimicrob Steward Healthc Epidemiol. 2025; 5(1):e42. PMID: 39949996.
      View in: PubMed
    6. Castillo A, Hudziec M, Totten SE, Pisney L. Team-based infection preventionist review improves inter-rater reliability in identification of healthcare-associated infections. Infect Control Hosp Epidemiol. 2024 Oct; 45(10):1234-1236. PMID: 39355890.
      View in: PubMed
    7. Ruchman SG, Fitzgerald B, Roda G, Van Ochten N, Castillo AY, Kaplan SR. A 52-Year-Old Man with a Chronic Nasal Wound. NEJM Evid. 2024 Jun; 3(6):EVIDmr2400089. PMID: 38804788.
      View in: PubMed
    8. Hartlage W, Bryson-Cahn C, Castillo AY, Jain R, Lynch JB, Martinez-Paz N, Chan JD, Kassamali Escobar Z. Asymptomatic bacteriuria in critical-access hospitals: Prevalence and patient characteristics driving treatment. Infect Control Hosp Epidemiol. 2024 Mar; 45(3):380-383. PMID: 37929617.
      View in: PubMed
    9. Castillo AY, Chan JD, Lynch JB, Bryson-Cahn C. How to disagree better: utilizing advocacy-inquiry techniques to improve communication and spur behavior change. Antimicrob Steward Healthc Epidemiol. 2023; 3(1):e201. PMID: 38028895.
      View in: PubMed
    10. McCormick C, McMahon B, Galatowitsch J, Castillo A. A 35-Year-Old Man with Fever. NEJM Evid. 2023 05; 2(5):EVIDmr2300047. PMID: 38320053.
      View in: PubMed
    11. Castillo AY, Zelikoff A, Chan JD, Lynch JB, Bryson-Cahn C. Rapid molecular severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) testing in hospital employees with mild, nonspecific respiratory symptoms facilitates expedient return to work. Infect Control Hosp Epidemiol. 2023 05; 44(5):813-816. PMID: 35225185.
      View in: PubMed
    12. Ankomah P, Castillo AY, O'Neil JC, Andrews H. A 66-Year-Old Man with Fever and Confusion. NEJM Evid. 2022 01; 1(1):EVIDmr2100037. PMID: 38319160.
      View in: PubMed
    13. Knierim SD, Newcomer S, Castillo A, Rahm AK, Raghunath S, Clarke C, Wright L, Haemer M, Hambidge SJ. Latino Parents' Perceptions of Pediatric Weight Counseling Terms. Acad Pediatr. 2018 04; 18(3):342-353. PMID: 28919572.
      View in: PubMed
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