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Understanding patterns of bacterial carriage and otitis media (OM) microbiology is crucial for assessing vaccine impact and informing policy. The microbiology of OM can vary with geography, time, and interventions like pneumococcal conjugate vaccines (PCVs). We evaluated the microbiology of nasopharyngeal and middle ear effusions in children living in Western Australia, 11 years following the introduction of PCV13.
Accumulating evidence indicates that antibiotic exposure may lead to impaired vaccine responses, however the mechanisms underlying this association remain poorly understood. Here we prospectively followed 191 healthy, vaginally born, term infants from birth to 15 months, using a systems vaccinology approach to assess the effects of antibiotic exposure on immune responses to vaccination.
Christopher Peter Hannah Blyth Richmond Moore MBBS (Hons) DCH FRACP FRCPA PhD MBBS MRCP(UK) FRACP OAM BSc (Hons) GradDipClinEpi PhD Centre Head,
Belaynew Christopher Peter Hannah Minda Huong Taye Blyth Richmond Moore Sarna Le MD, MPH, PhD MBBS (Hons) DCH FRACP FRCPA PhD MBBS MRCP(UK) FRACP OAM
Despite vaccination, influenza and otitis media (OM) remain leading causes of illness. We previously found that the human respiratory commensal Haemophilus haemolyticus prevents bacterial infection in vitro and that the related murine commensal Muribacter muris delays OM development in mice. The observation that M muris pretreatment reduced lung influenza titer and inflammation suggests that these bacteria could be exploited for protection against influenza/OM.
The Western Australia (WA) Respiratory Infections Linked Data Platform is a population-based cohort established to investigate the epidemiology of RSV and other respiratory infections in children aged 0-10 years, incorporating microbiological testing patterns, hospital admissions, emergency department presentations, and socio-demographic data.
In many countries, infant vaccination with acellular pertussis (aP) vaccines has replaced use of more reactogenic whole-cell pertussis (wP) vaccines. Based on immunological and epidemiological evidence, we hypothesised that substituting the first aP dose in the routine vaccination schedule with wP vaccine might protect against IgE-mediated food allergy. We aimed to compare reactogenicity, immunogenicity, and IgE-mediated responses of a mixed wP/aP primary schedule versus the standard aP-only schedule.
Serosurveys are considered as a valuable tool in estimating population immunity and infection rates but recruitment of children to provide paediatric estimates can be challenging. A novel approach of sampling children undergoing anaesthesia was utilised for a SARS-CoV-2 serosurvey in Australian children and we explore the reasons for participation, feedback on the approach and importance of research into Coronavirus Diseases 2019 (COVID-19).
Dynamic molecular changes in early life follow a robust ontogeny as the infant immune system adapts to the demands of its new environment. Studies of plasma immunomodulatory cytokines and chemokines have previously demonstrated ontogenetic patterns of immune development across the first week of life. However, how plasma cytokine and chemokines concentrations evolve over the first 4 months of life remains unknown.
Although uncommon, invasive meningococcal disease (IMD) results in death in 5%-10% of cases in healthy children and adolescents. This study aimed to examine demographics, clinical presentation, treatment and outcomes of Australian children hospitalized with IMD during the introduction of the meningococcal vaccine program, overall and by serogroup/disease severity.