Katherine L. O'Brien, United States of America

International Vaccine Access Centre Department of International Health, Johns Hopkins Bloomberg School of Health

Author Of 3 Presentations

 Conference Calendar

CHILDREN ADMITTED TO HOSPITAL WITH LOWER-CHEST-WALL INDRAWING PNEUMONIA IN SEVEN LOW AND MIDDLE-INCOME COUNTRIES: WHO DIED AND WHO SURVIVED? (ID 758)

Session Name
Clinical Sciences - Treatment of Pneumococcal Disease in Infants, Children/Youth, and Adults
Presenter
Authors

Abstract

Background

In 2013, to increase effective distribution of antibiotics, WHO revised treatment guidelines for childhood pneumonia with lower chest wall indrawing (LCWI) to recommend home-based-treatment with oral antibiotics rather than hospital-based management. We analysed the implications of this policy in the PERCH study, where all children were hospitalised.

Methods

In PERCH, 2113 children aged 2-59 months were admitted with LCWI pneumonia between 2011-2014 in Kenya, Zambia, South Africa, Mali, The Gambia, Bangladesh and Thailand. We analysed their mortality risk, and risk factors for mortality using logistic regression.

Results

Among cases with LCWI pneumonia, 76 (3.6%) died in hospital or within 7 days of discharge. Factors associated with fatal outcome included age (aOR 2.03 (95%CI 1.05-3.93) for infants vs older children), absence of cough, oxygen saturation (80-91% oxygen aOR 2.04 (1.07-3.90), <80% aOR 6.51 (2.82-15.0)), low anthropometric scores and HIV exposure.

Conclusions

Despite hospital admission, 3.6% of children with LCWI pneumonia died; mortality may be higher among similar children if treated in the community. Among children with LCWI pneumonia presenting to hospital, selective admission for those who also have hypoxia, features of malnutrition and young age may ensure that those with the greatest risk of death receive optimal supportive therapy.

Hide

DIFFERENCES IN PNEUMOCOCCAL CARRIAGE PREVALENCE BY TESTING METHOD AND SPECIMEN TYPE AMONG NATIVE AMERICAN INDIVIDUALS DURING ROUTINE USE OF 13-VALENT PNEUMOCOCCAL CONJUGATE VACCINE (PCV13) (ID 995)

Session Name
Clinical Sciences - Pneumococcal Infections in Aboriginal Populations
Presenter
Authors

CHARACTERIZATION OF STREPTOCOCCUS PNEUMONIAE SEROTYPE 3 CARRIAGE AND DISEASE ISOLATES AMONG NATIVE AMERICANS IN THE SOUTHWEST UNITED STATES (ID 1020)

Session Name
Basic Sciences - Genomics and Transmission
Presenter
Authors

Abstract

Background

Despite inclusion in PCV13, Streptococcus pneumoniae serotype 3 (ST3) continues to cause significant morbidity and mortality. In Native American communities in the southwest US in 2015-2017, the ST3 carriage prevalence among children was 2.7% and the incidence of ST3 invasive pneumococcal disease (IPD) among adults was 9.0/100,000. An emerging lineage of ST3 belonging to Clonal Complex (CC) 180, termed clade II, has recently increased.

Methods

We analyzed the genomic epidemiology of 202 ST3 isolates collected from 133 adults and 69 children with carriage (n=71) or IPD (n=131) from 1999–2018. Using phylogenetics based on whole-genome sequencing data, we determined clade membership of each isolate and assessed how the population structure changed over time.

Results

The percent of isolates belonging to clade II increased from 22.3% (n=94) in 1999-2010 to 65.7% (n=108) in 2010-2018 (Figure A). Carriage isolates were comprised equally by three clades (CC180 clade Ia n=24 and II n=23 and non-CC180 n=24); however, IPD isolates were more likely to be clade II (1a n=37, II n=69, non-CC180 n=25; OR=2.32, 95% CI 1.27-4.25) (Figure B).

figure a.pngfigure b.png

Conclusions

Overall, we find that ST3 clade II has increased significantly since the introduction of PCV13 and is found more commonly in invasive disease compared to other clades.

Hide