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otitis media

  • Open Access
    Capacity To Utilize Raffinose Dictates Pneumococcal Disease Phenotype
    Editor's Pick Research Article | Host-Microbe Biology
    Capacity To Utilize Raffinose Dictates Pneumococcal Disease Phenotype

    S. pneumoniae is a component of the commensal nasopharyngeal microflora of humans, but from this reservoir, it can progress to localized or invasive disease with a frequency that translates into massive global morbidity and mortality. However, the factors that govern the switch from commensal to pathogen, as well as those that determine disease tropism, are poorly...

    Vikrant Minhas, Richard M. Harvey, Lauren J. McAllister, Torsten Seemann, Anna E. Syme, Sarah L. Baines, James C. Paton, Claudia Trappetti
  • Open Access
    Antibodies against the Majority Subunit (PilA) of the Type IV Pilus of Nontypeable <span class="named-content genus-species" id="named-content-1">Haemophilus influenzae</span> Disperse <span class="named-content genus-species" id="named-content-2">Moraxella catarrhalis</span> from a Dual-Species Biofilm
    Research Article | Therapeutics and Prevention
    Antibodies against the Majority Subunit (PilA) of the Type IV Pilus of Nontypeable Haemophilus influenzae Disperse Moraxella catarrhalis from a Dual-Species Biofilm

    Middle ear infections (or otitis media [OM]) are highly prevalent among children worldwide and present a tremendous socioeconomic challenge for health care systems. More importantly, this disease diminishes the quality of life of young children. OM is often chronic and recurrent, due to the presence of highly antibiotic-resistant communities of bacteria (called biofilms) that persist within the middle ear space. To combat these...

    Elaine M. Mokrzan, Laura A. Novotny, Kenneth L. Brockman, Lauren O. Bakaletz
  • Open Access
    Research Article | Molecular Biology and Physiology
    Epigenetic Regulation Alters Biofilm Architecture and Composition in Multiple Clinical Isolates of Nontypeable Haemophilus influenzae

    Upper respiratory tract infections are the number one reason for a child to visit the emergency department, and otitis media (middle ear infection) ranks third overall. Biofilms contribute significantly to the chronic nature of bacterial respiratory tract infections, including otitis media, and make these diseases particularly difficult to treat. Several mucosa-associated human pathogens utilize a mechanism of rapid adaptation termed...

    Kenneth L. Brockman, Patrick N. Azzari, M. Taylor Branstool, John M. Atack, Benjamin L. Schulz, Freda E.-C. Jen, Michael P. Jennings, Lauren O. Bakaletz
  • Open Access
    Research Article
    Mucosal Infections and Invasive Potential of Nonencapsulated Streptococcus pneumoniae Are Enhanced by Oligopeptide Binding Proteins AliC and AliD

    Despite the effective, widespread use of licensed pneumococcal vaccines over many decades, pneumococcal infections remain a worldwide burden resulting in high morbidity and mortality. NESp subpopulations are rapidly rising in the wake of capsule-targeted vaccine strategies, yet there is very little knowledge on NESp pathogenic potential and virulence mechanisms. Although NESp lacks a protective capsule, NESp lineages expressing AliC and...

    Jessica L. Bradshaw, Haley R. Pipkins, Lance E. Keller, James K. Pendarvis, Larry S. McDaniel
  • Open Access
    Research Article
    Extracellular DNA and Type IV Pilus Expression Regulate the Structure and Kinetics of Biofilm Formation by Nontypeable Haemophilus influenzae
    Jayajit Das, Elaine Mokrzan, Vinal Lakhani, Lucia Rosas, Joseph A. Jurcisek, William C. Ray, Lauren O. Bakaletz
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