Faculty profile

Sergio Borgia

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Assistant Clinical Professor (Adjunct)MedicineMcMaster University

Research

Dr. Sergio Borgia, M.Sc., M.D., FRCP(C) is the Medical Director and Division Head of the Infectious Diseases Program at William Osler Health System where he is an Infectious Diseases consultant. He completed his graduate work in Medical Genetics & Microbiology at Mount Sinai Hospital, Toronto, and obtained his medical degree from Queen’s University. Since joining Osler, Dr. Borgia has served as a consultant for the Infection Prevention & Control Department as well as the Antimicrobial Stewardship Program. He presently holds the co-chair of the Pharmacy & Therapeutics committee. His clinical and research interests are in viral Hepatitis, Infection Prevention & Control of multi-resistant bacteria, and Tuberculosis. Dr. Borgia sits on the steering committee of the CanHepC Canadian Network Undertaking Against Hepatitis C (CANUHC). At Osler he is the medical director of the Hepatitis C and Tuberculosis clinics and serves as a consultant to Peel Public Health. He has published in numerous peer-reviewed journals and has served as a reviewer for JAMA, CMAJ, and CJG&H. Dr. Borgia believes in strong patient advocacy for Peel Region’s residents and seeks to increase access to health care resources, innovative treatments, and cross-disciplinary models of care.

Research areas, by share of publications

Research areas are derived from OpenAlex topics of their publications.

92 publications.

01

Invasive Group A Streptococcal Disease in Persons Experiencing Postpandemic Homelessness in Canada

Kassee C, Dabaja-Younis H, Richard L, Golden AR, Zhong Z, Allen V, Almohri H, Armstrong I, Baqi M, Barker KR

JAMA Network Open2026
02

Performances of the page-b and amap scores to predict hepatocellular carcinoma in patients with compensated delta cirrhosis treated long-term with bulevirtide monotherapy (save-d study)

Anolli MP, Degasperi E, Sambarino D, Borghi M, Perbellini R, Gheorghe L, Chitul M, Schramm C, Schmidt H, Jachs M

Journal of Hepatology2026
03

QAPI 132 A Multidisciplinary Collaborative Strategy to reduce Fluconazole Resistant Candida parapsilosis Transmission in a Canadian Intensive Care Unit

Pantelidis R, Borgia SM, Baqi M, Mahboob F, Haghshenas E, Rowaiye A

American Journal of Infection Control2026
04

Hepatitis C Treatment Outcomes Among Immigrants: A CANUHC Cohort Analysis

Imsirovic H, Fan S, Macphail G, Webster D, Smyth D, Borgia S, Feld JJ, Lee S, Cooper CL

Open Forum Infectious Diseases2026
05

Incidence of colonization and infection with carbapenemase-producing Enterobacterales in Toronto and Peel Region, Ontario, 2007-2024.

Li AX, Lefebvre M, Zhong Z, Almohri H, Armstrong I, Baqi M, Barker KR, Borgia S, Coleman BL, Downing M

JAMMI2026
06

Invasive Group A Streptococcal Infection in Children, 1992-2023

Dabaja-Younis H, Kandel C, Green K, Johnstone J, Zhong Z, Kassee C, Allen V, Armstrong I, Baqi M, Barker K

JAMA Network Open202526 citations
07

Resistance‐Associated Substitution Testing Trends and Impact on HCV Treatment Outcomes in Canada: A CanHepC‐CANUHC Analysis

Perera H, Imsirovic H, Macphail G, Webster D, Fraser C, Borgia S, Liu H, Lee S, Feld JJ, Cooper C

Journal of Viral Hepatitis20252 citations
08

P-643. Incidence and Clinical Characteristics of Invasive Group A Streptococcal Infections in Underhoused Adults in Toronto, Canada

Kassee C, Younis HD, Zhong Z, Allen V, Armstrong I, Baqi M, Barker KR, Bitnun A, Borgia S, Campigotto A

Open Forum Infectious Diseases2025
09

P-1290. Invasive group A streptococcal infection in children in Toronto, Canada

Younis HD, Johnstone J, Zhong Z, Kassee C, Allen V, Armstrong I, Baqi M, Barker KR, Bitnun A, Borgia S

Open Forum Infectious Diseases2025Senior author
10

How is ceftobiprole used in Canada: the CLEAR study final results

Zhanel GG, Kosar J, Baxter M, Dhami R, Borgia S, Irfan N, Dow G, Dube M, von den Baumen TR, Tascini C

Expert Review of Anti-Infective Therapy20246 citations

Roles and appointments

  • Medical Director, Infectious Diseases and Infection Prevention and Control, Osler Health System
  • Corporate Division Head, Infectious Diseases, William Osler Health System
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Applying for
Subject: Prospective PhD student: Hepatitis C virus research Dear Professor Borgia, My name is [your name], and I am a [your current degree or role] at [your institution]. I am applying for a PhD position starting in [term and year]. I read your paper "Invasive Group A Streptococcal Disease in Persons Experiencing Postpandemic Homelessness in Canada" (2026), and it connects closely to my own work on [your research topic]. [One or two sentences on what you did and what you learned.] Are you accepting new PhD students for [term and year]? I have attached my CV and transcripts, and I would be glad to talk at a time that suits you. Thank you for your time. Kind regards, [your name]
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