scholarly journals Natural Development of Antibodies against Streptococcus pneumoniae, Haemophilus influenzae, and Moraxella catarrhalis Protein Antigens during the First 13 Years of Life

2016 ◽  
Vol 23 (11) ◽  
pp. 878-883 ◽  
Author(s):  
Igor C. Borges ◽  
Dafne C. Andrade ◽  
Maria Regina A. Cardoso ◽  
Jorma Toppari ◽  
Mari Vähä-Mäkilä ◽  
...  
Keyword(s):  
Streptococcus Pneumoniae ◽  
Haemophilus Influenzae ◽  
Antibody Production ◽  
Moraxella Catarrhalis ◽  
Respiratory Infections ◽  
Protein Antigens ◽  
Serum Samples ◽  
Content Type ◽  
Natural Development ◽  
Antibody Levels

ABSTRACTConserved protein antigens have been investigated as vaccine candidates against respiratory pathogens. We evaluated the natural development of antibodies againstStreptococcus pneumoniae,Haemophilus influenzae, andMoraxella catarrhalisproteins during childhood. Serum samples were collected from 50 healthy children from their first months to age 13 years (median sampling interval, 6 months). We also analyzed serum samples from 24 adults. Serum IgG antibodies against eight pneumococcal proteins (Ply, CbpA, PspA 1 and 2, PcpA, PhtD, StkP-C, and PcsB-N), threeH. influenzaeproteins, and fiveM. catarrhalisproteins were measured using a multiplexed bead-based immunoassay. Antibody levels were analyzed using multilevel mixed-effects regression and Spearman's correlation. Antibody levels against pneumococcal proteins peaked at 3 to 5 years of age and then reached a plateau. Antibody levels againstH. influenzaeproteins peaked during the second year and then stabilized. Antibody levels againstM. catarrhalisproteins peaked during the first year and then slowly decreased. Peak antibody levels during childhood were higher than those of adults. Correlations among pneumococcal antibody levels were highest among anti-CbpA, anti-PcpA, and anti-PhtD antibodies (r= 0.71 to 0.75;P< 0.001). The children presented 854 symptomatic respiratory infections on 586 occasions. Symptomatic respiratory infections did not improve prediction of antibody levels in the regression model. The maturation of immune responses against the investigated pneumococcal proteins shares similarities, especially among CbpA, PcpA, and PhtD. Antibody production againstH. influenzaeandM. catarrhalisproteins starts early in life and reaches peak levels earlier than antibody production against the pneumococcal proteins. Basal antibody levels are not related to the occurrence of symptomatic respiratory infections.

scholarly journals In VitroActivity of Delafloxacin Tested against Isolates of Streptococcus pneumoniae, Haemophilus influenzae, and Moraxella catarrhalis

2016 ◽  
Vol 60 (10) ◽  
pp. 6381-6385 ◽  
Author(s):  
Robert K. Flamm ◽  
Paul R. Rhomberg ◽  
Michael D. Huband ◽  
David J. Farrell
Keyword(s):  
United States ◽  
Streptococcus Pneumoniae ◽  
Haemophilus Influenzae ◽  
Moraxella Catarrhalis ◽  
The United States ◽  
Gram Negative Bacteria ◽  
Gram Positive ◽  
Gram Negative ◽  
Content Type

ABSTRACTDelafloxacin, an investigational anionic fluoroquinolone, is active against a broad range of Gram-positive and Gram-negative bacteria. In this study, 200Streptococcus pneumoniae(plus 30 levofloxacin-resistant isolates), 200Haemophilus influenzae, and 100Moraxella catarrhalisisolates selected primarily from the United States (2014) were tested against delafloxacin and comparator agents. Delafloxacin was the most potent agent tested. MIC50and MIC90values against allS. pneumoniaeisolates were 0.008 and 0.015 μg/ml. Delafloxacin susceptibility was not affected by β-lactamase status againstH. influenzaeandM. catarrhalis.

scholarly journals The Adenoids but Not the Palatine Tonsils Serve as a Reservoir for Bacteria Associated with Secretory Otitis Media in Small Children

mSystems ◽  
2019 ◽  
Vol 4 (1) ◽  
Author(s):  
Helena Fagö-Olsen ◽  
Laura Marie Dines ◽  
Christian Hjort Sørensen ◽  
Anders Jensen
Keyword(s):  
Streptococcus Pneumoniae ◽  
Haemophilus Influenzae ◽  
Otitis Media ◽  
Moraxella Catarrhalis ◽  
Secretory Otitis Media ◽  
Small Children ◽  
Palatine Tonsils ◽  
Content Type ◽  
Significant Difference ◽  
Tract Infections

ABSTRACT Acute otitis media (AOM), secretory otitis media (SOM), and acute pharyngotonsillitis are the most frequent reasons for visits to general practitioners, pediatricians, and otolaryngologists. Microbial colonization of the epithelial lining of Waldeyer’s lymphatic tissues, consisting of the palatine tonsils, lingual tonsils, adenoids, and Eustachian tube tonsil, is a well-known clinical challenge during infancy due to frequent episodes of upper respiratory tract infections. However, no previous studies have investigated the combined role of the palatine tonsils and the adenoids as a reservoir for pathogens associated with SOM in small children. We analyzed the combined crypt microbiome of the palatine tonsils and adenoids from 14 small children with hyperplasia of the tonsils or adenoids and 14 small children with SOM using 16S rRNA gene pyrosequencing. Our study demonstrated a significant difference between the microbiome of the adenoids and that of the palatine tonsils in the two groups but not between the two anatomical locations within the two groups. In particular, the potential pathogens Streptococcus pneumoniae, Haemophilus influenzae, and Moraxella catarrhalis were almost exclusively found in the adenoids of both patient groups, indicating that the adenoids and not the palatine tonsils are the main reservoir for potential pathogens leading to AOM and SOM. IMPORTANCE Our findings that the microbiome differs between crypts of the adenoids and crypts of the palatine tonsils, including the relative abundances of potential pathogens such as Haemophilus influenzae, Streptococcus pneumoniae, and Moraxella catarrhalis, may be the stepping stone for further investigation of individual microbiomes in a longitudinal design that includes recording of the fluctuating health status of the child. Such studies may have the potential to lead to new preventive measurements such as implantation of protective nonpathogens at the nasopharynx as an alternative to adenoidectomy.

scholarly journals The Relationship between Colonization by Moraxella catarrhalis and Tonsillar Hypertrophy

2018 ◽  
Vol 2018 ◽  
pp. 1-9
Author(s):  
Mirela C. M. Prates ◽  
Edwin Tamashiro ◽  
José L. Proenca-Modena ◽  
Miriã F. Criado ◽  
Tamara H. Saturno ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Pseudomonas Aeruginosa ◽  
Streptococcus Pneumoniae ◽  
Haemophilus Influenzae ◽  
Moraxella Catarrhalis ◽  
Pathogenic Bacteria ◽  
Simultaneous Detection ◽  
Tonsillar Hypertrophy ◽  
Palatine Tonsils ◽  
Adenotonsillar Hypertrophy

We sought to investigate the prevalence of potentially pathogenic bacteria in secretions and tonsillar tissues of children with chronic adenotonsillitis hypertrophy compared to controls. Prospective case-control study comparing patients between 2 and 12 years old who underwent adenotonsillectomy due to chronic adenotonsillar hypertrophy to children without disease. We compared detection of Streptococcus pneumoniae, Haemophilus influenzae, Staphylococcus aureus, Pseudomonas aeruginosa, and Moraxella catarrhalis by real-time PCR in palatine tonsils, adenoids, and nasopharyngeal washes obtained from 37 children with and 14 without adenotonsillar hypertrophy. We found high frequency (>50%) of Haemophilus influenzae, Streptococcus pneumoniae, Moraxella catarrhalis, and Pseudomonas aeruginosa in both groups of patients. Although different sampling sites can be infected with more than one bacterium and some bacteria can be detected in different tissues in the same patient, adenoids, palatine tonsils, and nasopharyngeal washes were not uniformly infected by the same bacteria. Adenoids and palatine tonsils of patients with severe adenotonsillar hypertrophy had higher rates of bacterial coinfection. There was good correlation of detection of Moraxella catarrhalis in different sampling sites in patients with more severe tonsillar hypertrophy, suggesting that Moraxella catarrhalis may be associated with the development of more severe hypertrophy, that inflammatory conditions favor colonization by this agent. Streptococcus pneumoniae, Staphylococcus aureus, Haemophilus influenzae, and Moraxella catarrhalis are frequently detected in palatine tonsils, adenoids, and nasopharyngeal washes in children. Simultaneous detection of Moraxella catarrhalis in adenoids, palatine tonsils, and nasopharyngeal washes was correlated with more severe tonsillar hypertrophy.

scholarly journals Susceptibilidad a antimicrobianos de patógenos respiratorios en niños provenientes de la comunidad

2013 ◽  
Vol 65 (1) ◽  
pp. 14
Author(s):  
José M Guevara ◽  
Rosaluz Aróstegui ◽  
Wini Agurto ◽  
Iliana Sobrevilla ◽  
Esther Valencia ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Streptococcus Pneumoniae ◽  
Haemophilus Influenzae ◽  
Streptococcus Pyogenes ◽  
Moraxella Catarrhalis

OBJETIVO: Determinar la resistencia de los patógenos respiratorios a diferentes antimicrobianos. MATERIAL Y MÉTODOS: Entre abril y noviembre de 2002 se estudió 177 pacientes que asistieron al consultorio externo de otorrinolaringología del Hospital Nacional Docente Madre-Niño San Bartolomé. RESULTADOS: Streptococcus pneumoniae fue la bacteria patógena más aislada (57,2%), luego Moraxella catarrhalis (42,7%), Staphylococcus aureus (18,6%) y en pequeña cantidad Haemophilus influenzae (3,4%) y Streptococcus pyogenes (0,7%). Streptococcus pneumoniae presentó 31,3% de resistencia a la penicilina. El 96,7% de Moraxella catarrhalis fueron productoras de betalactamasa y 7,4% de los Staphylococcus aureus fueron resistentes a la oxacilina. CONCLUSIÓN: Streptococcus pneumoniae es el principal agente causal de los procesos infecciosos altos en niños y su resistencia a la penicilina aumentó a 31,3%

scholarly journals The role of air pollution and bacteria in COPD

2020 ◽  
Vol 2 (7A) ◽  
Author(s):  
Lillie Faye Purser ◽  
Jo Purves ◽  
Louise Corscadden ◽  
Liza Selley ◽  
Paul S. Monks ◽  
...  
Keyword(s):  
Air Pollution ◽  
Streptococcus Pneumoniae ◽  
Bacterial Infection ◽  
Moraxella Catarrhalis ◽  
Respiratory Infections ◽  
A549 Cells ◽  
Current Data ◽  
Copd Exacerbation ◽  
Exacerbation Of Copd

Air pollution is the single largest environmental health risk worldwide. Particulate matter (PM) air pollution is released as a result of fossil fuel combustion and vehicle motion, breaking and tyre wear. It has been shown that exposure to PM can cause increased levels of respiratory disease, including the exacerbation of COPD, which is frequently associated with bacterial infection. Despite this, the effects of air pollution exposure on COPD associated respiratory bacteria, includingHaemophilus influenzae, Moraxella catarrhalis and Streptococcus pneumoniae are largely unknown. Our recent publication was the first to document that as well as damaging the host, PM has a direct impact on bacteria that can cause respiratory infections. We showed that exposure to black carbon (BC), an important component of PM, results in alterations in biofilm structure in both Streptococcus pneumoniae and Staphylococcus aureus, and increases dissemination of colonising S. pneumoniaein in vivo models. Following on from this work, we aim to determine how BC impacts the growth, behaviour and virulence of bacteria associated with the COPD exacerbation, including non-typeable Haemophilus influenzaeand Moraxella catarrhalis. Current data show that BC exposure is decreasing the biofilm forming ability of NTHistrains 162 and 375. M. catarrhalis strain M61 biofilm formation is also decreased in the presence of BC, while its growth rate is increased. In addition, pre-exposing NTHi375 cells to BC, prior to infection of A549 cells, increases their ability to adhere to human epithelial cells. This suggests that the frequency of bacterial infection induced COPD exacerbation may be altered in patients from highly polluted areas.

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