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Research

Sickle cell disease (SCD) is an inherited red blood cell disease that results in a multitude of medical complications, including an increased risk of invasive disease caused by encapsulated bacteria, such as Streptococcus pneumoniae. Pneumococcal vaccines have contributed to a significant reduction in pneumococcal disease (PD) in children and adults, including those with SCD. This phase 3 study evaluated the safety and immunogenicity of V114, a 15-valent pneumococcal conjugate vaccine, in children with SCD.

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Australian governments have used vaccine mandates to drive high uptake of routine childhood vaccines and adult Coronavirus Disease 2019 (COVID-19) and influenza vaccines. We sought to understand the attitudes of Western Australian parents regarding mandating COVID-19 vaccines for children, interviewing 44 parents of children aged up to 18 years between May and December 2021. Transcripts were analysed to ascertain parents' attitudes and sources of reasoning.

Research

A vaccine against influenza is available seasonally but is not 100% effective. A predictor of successful seroconversion in adults is an increase in activated circulating T follicular helper (cTfh) cells after vaccination. However, the impact of repeated annual vaccinations on long-term protection and seasonal vaccine efficacy remains unclear.

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Transcriptomic analyses from early human immunodeficiency virus (HIV) infection have the potential to reveal how HIV causes widespread and lasting damage to biological functions, especially in the immune system. Previous studies have been limited by difficulties in obtaining early specimens.

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Streptococcus pyogenes (Strep A) is a leading cause of morbidity and mortality across the globe, annually causing hundreds of millions of cases of disease.

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We compared the epidemiology, severity and management of hospitalized respiratory syncytial virus (n = 305) and human metapneumovirus (n = 39) bronchiolitis in a setting with high respiratory virus testing (95% of admissions tested). Respiratory syncytial virus-positive infants were younger and tended to require more hydration support and longer hospital stays compared to human metapneumovirus-positive infants. Respiratory support requirements were similar between groups despite significant age differences. 

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This work is the first step to develop safe treatments for pregnant mums to protect against preterm delivery and low birth weight caused by maternal infections.

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The primary objectives of this study were to assess the usefulness of C-reactive protein and procalcitonin in the diagnosis of bacterial co-infections in coronavirus disease 2019 (COVID-19) and if their incorporation in antimicrobial stewardship programs is safe and useful, stratified by severity of disease as level of care, intensive care unit (ICU) or non-ICU.

Research

Nontypeable Haemophilus influenzae (NTHi) is a major otitis media (OM) pathogen, with colonization a prerequisite for disease development. Most acute OM is in children <5 years old, with recurrent and chronic OM impacting hearing and learning. Therapies to prevent NTHi colonization and/or disease are needed, especially for young children. Respiratory viruses are implicated in driving the development of bacterial OM in children.

Research

The incidence of respiratory syncytial virus (RSV) in adults is inadequately defined and the impact of SARS-CoV-2-related non-pharmaceutical interventions (NPIs) is underexplored. Using laboratory data, we described the detection rate of RSV in adults ≥16 years in Western Australia (WA) between 2017 and 2023.