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PCV10 elicits Protein D IgG responses in Papua New Guinean children but has no impact on NTHi carriage in the first two years of life

Nasopharyngeal colonisation with nontypeable Haemophilus influenzae (NTHi) is associated with development of infections including pneumonia and otitis media. The 10-valent pneumococcal conjugate vaccine (PCV10) uses NTHi Protein D (PD) as a carrier. Papua New Guinean children have exceptionally early and dense NTHi carriage, and high rates of NTHi-associated disease.

Panel 7 – Pathogenesis of otitis media – A review of the literature between 2015 and 2019

The most urgent areas appear to be to continue monitoring the emergence of novel otopathogens, and the need to develop prevention and preventative therapies

Panel 8: Vaccines and immunology

Review and highlight of the significant advances made towards vaccine development and understanding of the immunology of otitis media

Increased CTLA-4+ T cells may contribute to impaired T helper type 1 immune responses in patients with chronic obstructive pulmonary disease

Chronic inflammation may expand sub-populations of T cells expressing CTLA-4 in COPD patients and therefore impair T-cell function

Bacterial Reservoirs in the Middle Ear of Otitis-prone Children Are Associated With Repeat Ventilation Tube Insertion

Presence of bacterial otopathogen in the middle ear during ventilation tube insertion was a predictor of children at-risk of repeat ventilation tube insertion

High concentrations of middle ear antimicrobial peptides and proteins are associated with detection of middle ear pathogens in children with recurrent acute otitis media

Elevated antimicrobial proteins and peptides and cytokines in middle ear effusion are a marker of inflammation and bacterial persistence

The contribution of viruses and bacteria to community-acquired pneumonia in vaccinated children: A case - Control study

Respiratory viruses, particularly respiratory syncytial virus and human metapneumovirus, are major contributors to pneumonia in Australian children

Pcv7-and pcv10-vaccinated otitis-prone children in new zealand have similar pneumococcal and haemophilus influenzae densities in their nasopharynx and middle ear

PCV10 did not reduce NTHi density in the nasopharynx or middle ear, and was associated with increased pneumococcal nasopharyngeal density

Moraxella catarrhalis Restriction-Modification Systems Are Associated with Phylogenetic Lineage and Disease

We observed an association between Type III DNA methyltransferase presence and Otitis Media-associated middle ear isolates