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Understanding parental decisions to decline or delay infant RSV immunisation, nirsevimab, in Western Australia in 2024

In 2024, the government of Western Australia introduced 'nirsevimab', a monoclonal antibody offering protection from respiratory syncytial virus (RSV), for eligible infants. This study explores why parents of infants who were eligible to receive nirsevimab opted to decline or delay the immunisation.

Socio-economic inequality underpins inequity in influenza vaccination uptake between public and private secondary schools: an Australian population-based study

Socio-economic inequality and vaccination inequity have long been critical issues. However, no studies have explored the gap in influenza vaccination uptake between public and private schools. Importantly, the extent to which socio-economic inequality translates into vaccination uptake inequity has not been quantified.

Methicillin-resistant Staphylococcus aureus and vancomycin-resistant Enterococcus faecium infections in children in the Oceania region

Antimicrobial resistance poses a significant threat to children's health, with up to 20% of 1.27 million deaths attributable to bacterial AMR annually, occurring in children <5 years. The WHO 2024 Bacterial Priority Pathogens List identifies methicillin-resistant Staphylococcus aureus (MRSA) and vancomycin-resistant Enterococcus faecium (VRE) as critical pathogens. This review examines the epidemiology, treatment recommendations, dosing strategies, efficacy, and safety data for antibiotics targeting MRSA and VRE infections in children in Oceania.

Understanding Malaria Transmission and Control within and Between Regions in Zambia Using a Socio-Spatial Determinants of Health Framework

Differential exposure and effect of malaria results from blends of biophysical, geospatial, and social determinants of health (SDoH). Likewise, effective policies and programmatic interventions against malaria must consider the complex interaction of social and spatial factors, while comprehensive health promotion approaches must simultaneously tackle SDoH and the ecological dimensions that drive malaria. 

Higher Promoter Methylation of the Ubiquitin-Associated and SH3 Domain Containing A (UBASH3A) Gene Is Associated With T-Lymphocyte Ontogeny and Reduced Susceptibility to Early-Onset Sepsis

We investigated the genetic and epigenetic regulation of the UBASH3A gene and its association with early-onset sepsis. Using matched whole blood DNA methylation, gene expression, genotypes, and immune cell counts from the EPIC-HIPC newborn cohort, we report that promoter methylation was negatively correlated with ontogenetic changes in UBASH3A gene expression and circulating CD3+ T-cell numbers. 

Evaluating the effectiveness of the 13-valent pneumococcal conjugate vaccine and clinical and demographic characteristics on pneumococcal carriage density in young children

High nasopharyngeal pneumococcal carriage density is associated with severe pneumonia; however, little is known about factors that affect pneumococcal carriage density including pneumococcal vaccination. We describe pneumococcal density by clinical and demographic factors, and effect of 13-valent pneumococcal conjugate vaccine (PCV13) on density in Papua New Guinea (PNG), Lao People’s Democratic Republic (Lao PDR) and Mongolia, 3–6 years following national PCV13 introduction.

Country-level and global burden of diseases caused by group A Streptococcus: protocol for a multicountry epidemiological study

Group A Streptococcus (Strep A) causes a wide spectrum of diseases, ranging from pharyngitis and impetigo to severe invasive infections and immune-mediated conditions such as acute rheumatic fever, rheumatic heart disease and acute post-streptococcal glomerulonephritis. Contemporary data on the global burden of Strep A diseases are lacking.

The Association Between Obesity and COVID-19 Severity in Children Differed Between SARS-CoV-2 Variants: A Multicountry Hospital-based Observational Study

Obesity was a risk factor for severe COVID-19 in children during early outbreaks of ancestral SARS-CoV-2 and the Delta variant. However, the relationship between obesity and COVID-19 severity during the Omicron wave remains unclear.

Drug-resistant gram-negative bacterial infections in children in the Oceania region: review of the epidemiology, antimicrobial availability, treatment, clinical trial and pharmacokinetic

Gram-negative bacterial infections remain a major cause of morbidity and mortality in children and neonates globally, compounded by the rise of antimicrobial resistance. Barriers to paediatric antibiotic licencing lead to reduced availability of potentially effective agents for treatment. For children and neonates in the Oceania region, specific challenges remain including a paucity of surveillance data on local rates of antimicrobial resistance, and lack of availability of newer, more costly agents.

Challenges and insights in self-swab surveillance for asymptomatic Streptococcus pyogenes carriage

Asymptomatic carriage of Streptococcus pyogenes (Strep A) may contribute to transmission, yet its role remains poorly understood and evidence on optimal detection methods is limited. While self-collected throat swabs are used in infectious disease surveillance, their value for identifying asymptomatic Strep A carriage in adults is uncertain. This pilot prospective cohort study, conducted at a Perth medical research institute between August and October 2024, assessed feasibility and acceptability of self-collection, with sensitivity as a secondary objective.