Courtney P. Olwagen

Johannesburg, GT, South Africa

Last Updated: 09/26/2026

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Found 32 publications

Waning of measles immunity by 5 years of age following an accelerated two-dose measles vaccine schedule at 6 and 12 months in South African children: an observational cohort study.

Waning of measles immunity by 5 years of age following an accelerated two-dose measles vaccine schedule at 6 and 12 months in South African children: an observational cohort study.

Journal: Vaccine

Published: December 28, 2025

Genomic Characterization of Klebsiella pneumoniae Causing Invasive Disease in South African Infants: Observational Studies Between 2018 and 2023.

Genomic Characterization of Klebsiella pneumoniae Causing Invasive Disease in South African Infants: Observational Studies Between 2018 and 2023.

Journal: Open forum infectious diseases

Published: December 10, 2025

Factors associated with Klebsiella pneumoniae colonisation in adults hospitalised in Johannesburg, South Africa.

Factors associated with Klebsiella pneumoniae colonisation in adults hospitalised in Johannesburg, South Africa.

Journal: Southern African journal of infectious diseases

Published: November 26, 2025

Clinical and microbiological epidemiology of Klebsiella pneumoniae invasive disease in hospitalized adults in Johannesburg, South Africa: a multicentre observational study.

Clinical and microbiological epidemiology of Klebsiella pneumoniae invasive disease in hospitalized adults in Johannesburg, South Africa: a multicentre observational study.

Journal: JAC-antimicrobial resistance

Published: November 18, 2025

Contribution of nosocomial transmission to Klebsiella pneumoniae neonatal sepsis in Africa and South Asia: An observational study of infection clusters inferred from pathogen genomics and temporal data.

Contribution of nosocomial transmission to Klebsiella pneumoniae neonatal sepsis in Africa and South Asia: An observational study of infection clusters inferred from pathogen genomics and temporal data.

Journal: PLoS medicine

Published: November 15, 2025

Global perspectives on Klebsiella epidemiology and biology: conference report on the KLEBS 2024 symposium.

Global perspectives on Klebsiella epidemiology and biology: conference report on the KLEBS 2024 symposium.

Journal: npj antimicrobials and resistance

Published: July 01, 2025

Distribution of capsule and O types in Klebsiella pneumoniae causing neonatal sepsis in Africa and South Asia: A meta-analysis of genome-predicted serotype prevalence to inform potential vaccine coverage.

Distribution of capsule and O types in Klebsiella pneumoniae causing neonatal sepsis in Africa and South Asia: A meta-analysis of genome-predicted serotype prevalence to inform potential vaccine coverage.

Journal: PLoS medicine

Published: June 27, 2025

Weekly azithromycin for 48 weeks impacts nasopharyngeal microbial prevalence and Streptococcus pneumoniae serotypes in children with HIV-associated chronic lung disease.

Weekly azithromycin for 48 weeks impacts nasopharyngeal microbial prevalence and Streptococcus pneumoniae serotypes in children with HIV-associated chronic lung disease.

Journal: Scientific reports

Published: May 26, 2025

Serotype-specific pneumococcal invasiveness: a global meta-analysis of paired estimates of disease incidence and carriage prevalence.

Serotype-specific pneumococcal invasiveness: a global meta-analysis of paired estimates of disease incidence and carriage prevalence.

Journal: The Lancet. Microbe

Published: February 06, 2025

Serotype-specific serum immunoglobulin G at 18 months of age following one or two doses of a primary series of 10-valent or 13-valent pneumococcal conjugate vaccine and a booster dose at nine months of age: a randomized controlled study.

Serotype-specific serum immunoglobulin G at 18 months of age following one or two doses of a primary series of 10-valent or 13-valent pneumococcal conjugate vaccine and a booster dose at nine months of age: a randomized controlled study.

Journal: Expert review of vaccines

Published: January 27, 2025

Genomic relatedness of colonizing and invasive disease Klebsiella pneumoniae isolates in South African infants.

Genomic relatedness of colonizing and invasive disease Klebsiella pneumoniae isolates in South African infants.

Journal: Scientific reports

Published: October 24, 2024

Single priming and a booster dose of 10-valent and 13-valent pneumococcal conjugate vaccine (PCV) maintains suppression of vaccine serotype colonization in South African children at 3, 4, and 5 years of age: a single-centre, open-labelled, randomized trial.

Single priming and a booster dose of 10-valent and 13-valent pneumococcal conjugate vaccine (PCV) maintains suppression of vaccine serotype colonization in South African children at 3, 4, and 5 years of age: a single-centre, open-labelled, randomized trial.

Journal: Expert review of vaccines

Published: October 17, 2024

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Last Updated: 09/26/2026