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Calman A. MacLennan

Calman A. MacLennan

BM, BCh, DPhil, FHEA, FRCP, FRCPath


Professor of Vaccine Immunology (University of Birmingham)

  • Jenner Investigator and Group Leader - Gonococcal Vaccine Project, Jenner Institute
  • Director of BactiVac, the Bacterial Vaccines Network, Institute of Immunology and Immunotherapy, University of Birmingham, UK
  • Consultant Immunologist, Oxford University Hospitals NHS Foundation Trust, UK
  • Senior Program Officer, Bacterial Vaccines, Global Health, Enteric & Diarrheal Diseases, Bill & Melinda Gates Foundation, Seattle, US

Vaccinologist, Immunologist & Clinician Scientist focused on bacterial infections and AMR

Calman MacLennan is a clinician scientist, vaccinologist and immunologist who joined the Jenner Institute in 2015. For the past 25 years, his career has focused on understanding mechanisms of immunological of protection against bacterial infections of global health significance and antimicrobial resistance (AMR) concern. This knowledge has then been applied to the development of protective vaccines.

With experience of vaccine development in academia and industry, he has been involved in the development of several bacterial vaccines including one licensed vaccine against typhoid and other vaccines currently in clinical trials.

He leads the Gonococcal Vaccine Project which is using native Outer Membrane Vesicle (nOMV) technology to develop a candidate vaccine against Neisseria gonorrhoeae, the causative agent of gonorrhoea. Gonorrhoea infects 82.4 million people each year and is rapidly becoming resistant to all known antibiotics.

Professor MacLennan is the founder and director of BactiVac, the Bacterial Vaccines Network, a worldwide network based out of the University of Birmingham with a mission to accelerate the development of vaccines against bacterial pathogens as a countermeasure to AMR. He is a Consultant Immunologist at the Oxford University Hospitals NHS Foundation Trust.

Key publications

Threshold protective levels of serum IgG to Shigella lipopolysaccharide: re-analysis of Shigella vaccine trials data

Journal article

Cohen D. et al, (2023), Clinical Microbiology and Infection, 29, 366 - 371

Impact and Control of Sugar Size in Glycoconjugate Vaccines

Journal article

Stefanetti G. et al, (2022), Molecules, 27

The Shigella Vaccines Pipeline

Journal article

MacLennan CA. et al, (2022), Vaccines, 10

Critical Needs in Advancing Shigella Vaccines for Global Health

Journal article

Maclennan CA. et al, (2022), Journal of Infectious Diseases, 225, 1500 - 1503

Short Vi-polysaccharide abrogates T-independent immune response and hyporesponsiveness elicited by long Vi-CRM197 conjugate vaccine

Journal article

Micoli F. et al, (2020), Proceedings of the National Academy of Sciences of the United States of America, 117, 24443 - 24449

Outer membrane vesicle vaccines

Journal article

Micoli F. and MacLennan CA., (2020), Seminars in Immunology, 50

Comparative immunogenicity and efficacy of equivalent outer membrane vesicle and glycoconjugate vaccines against nontyphoidal Salmonella

Journal article

Micoli F. et al, (2018), Proceedings of the National Academy of Sciences of the United States of America, 115, 10428 - 10433

Brief Report: Immunization of HIV-Infected Adults in the UK with Haemophilus influenzae b/Meningococcal C Glycoconjugate and Pneumococcal Polysaccharide Vaccines

Journal article

MacLennan CA. et al, (2016), Journal of Acquired Immune Deficiency Syndromes, 73, 287 - 293

Cytokine profiles during invasive nontyphoidal salmonella disease predict outcome in african children

Journal article

Gilchrist JJ. et al, (2016), Clinical and Vaccine Immunology, 23, 601 - 609

Bactericidal Immunity to Salmonella in Africans and Mechanisms Causing Its Failure in HIV Infection

Journal article

Goh YS. et al, (2016), PLoS Neglected Tropical Diseases, 10

Genetic susceptibility to invasive Salmonella disease

Journal article

Gilchrist JJ. et al, (2015), Nature Reviews Immunology, 15, 452 - 463

Design of glycoconjugate vaccines against invasive African Salmonella enterica serovar Typhimurium

Journal article

Rondini S. et al, (2015), Infection and Immunity, 83, 996 - 1007

Vaccines against poverty

Journal article

MacLennan CA. and Saul A., (2014), Proceedings of the National Academy of Sciences of the United States of America, 111, 12307 - 12312

Development of a glycoconjugate vaccine to prevent meningitis in Africa caused by meningococcal serogroup X

Journal article

Micoli F. et al, (2013), Proceedings of the National Academy of Sciences of the United States of America, 110, 19077 - 19082

Dysregulated humoral immunity to nontyphoidal Salmonella in HIV-Infected african adults

Journal article

MacLennan CA. et al, (2010), Science, 328, 508 - 512

Importance of antibody and complement for oxidative burst and killing of invasive nontyphoidal Salmonella by blood cells in Africans

Journal article

Gondwe EN. et al, (2010), Proceedings of the National Academy of Sciences of the United States of America, 107, 3070 - 3075

The neglected role of antibody in protection against bacteremia caused by nontyphoidal strains of Salmonella in African children

Journal article

MacLennan CA. et al, (2008), Journal of Clinical Investigation, 118, 1553 - 1562

More publications