Wesley H. Self, United States of America

Vanderbilt University Medical Center Emergency Medicine

Presenter Of 2 Presentations

Author Of 5 Presentations

COGNITIVE FUNCTION FOLLOWING PNEUMOCOCCAL AND ALL-CAUSE PNEUMONIA: RESULTS FROM THE PNEUMO STUDY (ID 353)

Abstract

Background

Systemic inflammation from pneumonia may lead to acute brain dysfunction and long-term cognitive impairment, especially in older patients with severe pneumonia.

Methods

As part of the ongoing Pneumococcal Pneumonia Epidemiology, Urine Serotyping, and Mental Outcomes (PNEUMO) study, we prospectively enrolled adults hospitalized with community-acquired pneumonia. We tested for Streptococcus pneumoniae with cultures and BinaxNOW urinary antigen tests. We assessed global cognition in patients ≥50 years old with the Montreal Cognitive Assessment-Blind Adaptation (MoCA-Blind). MoCA-Blind scores range from 0 to 22 with higher scores indicating better cognition. Adults with a MoCA-Blind score <18 are considered to have cognitive impairment. We administered the MoCA-Blind instrument at enrollment when the patient was acutely ill and 6-months later by phone.

Results

At the time of this interim analysis, 150 patients had cognitive assessments completed at enrollment and 6-months, including 12 (8.0%) with pneumococcal pneumonia. Median (IQR) age was 64 (58-71) years. Cognitive impairment was common at both enrollment and 6-months later (Figure). At 6-month follow-up, 58% of pneumococcal and 52% of non-pneumococcal pneumonia patients had a MoCA-Blind score <18.

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Conclusions

Hospitalization for pneumonia, including pneumococcal pneumonia, is associated with high risk of acute and persistent cognitive impairment among US adults ≥50 years old.

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STREPTOCOCCUS PNEUMONIAE SEROTYPE DISTRIBUTION AND COVERAGE OF PNEUMOCOCCAL CONJUGATE VACCINES IN ADULTS HOSPITALIZED WITH COMMUNITY-ACQUIRED PNEUMONIA IN THE UNITED STATES (ID 879)

Abstract

Background

The study objective was to determine the prevalence of serotypes and coverage provided by currently licensed and next generation pneumococcal conjugate vaccines (PCVs) in adults hospitalized with community-acquired pneumonia (CAP) in the United States.

Methods

Hospitalized adults aged ≥18 years with radiologically-confirmed (CXR+) CAP were enrolled from 10 U.S. cities between October 2013 and September 2016. S. pneumoniae isolates cultured from normally-sterile standard-of-care specimens were serotyped by Quellung. Urine was tested using BinaxNOW® and a serotype-specific urine antigen detection (UAD) assay that detects serotypes contained in PCV13 plus 6C (highly-related to 6A), PCV15 (PCV13 serotypes, 22F, and 33F), PCV20 (PCV15 serotypes, 8, 10A, 11A, 12F, and 15B plus 15C (highly-related to 15B)), and non-PCV serotypes 2, 9N, 17F, and 20. Coverage was calculated as the percent of CXR+CAP participants positive for a serotype in PCV13, PCV15, and PCV20.

Results

Of 15,572 enrolled participants, 12,055 with CXR+CAP were included in the analysis; 52.7% (n=6347) were ≥65 years. Coverage of CXR+CAP varied by PCV formulation (Table). About 1% of CXR+CAP was due to serotypes 2, 9N, 17F, and 20 combined.

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Conclusions

Compared to PCV13, PCV20 increased coverage of CXR+CAP due to PCV serotypes by 71% (18-64 years) and 64% (≥65 years).

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INVASIVE PNEUMOCOCCAL DISEASE IN ADULTS IN TENNESSEE AND GEORGIA, USA: RESULTS FROM THE PNEUMO STUDY (ID 351)

Abstract

Background

Surveillance of invasive pneumococcal disease (IPD) is important to understand the effects of direct and indirect protection from pneumococcal vaccination programs and inform vaccine development and policy.

Methods

As part of the ongoing Pneumococcal Pneumonia Epidemiology, Urine Serotyping, and Mental Outcomes (PNEUMO) study, we enrolled adults hospitalized with IPD in Nashville and Atlanta from September-2018 to August-2019. IPD was defined by isolation of Streptococcus pneumoniae from a normally-sterile site.

Results

We enrolled 25 IPD cases, including 18 (72%) pneumonia, 5 (20%) bacteremia without an identified focus, 1 meningitis, and 1 septic arthritis. Pneumococcal serotype was identified from blood culture in 20 cases, including serotypes: 35B–(3 cases), 3-(2 cases), 15A-(2 cases), 19F-(2 cases), 20-(2 cases), 23A-(2 cases), 22F, 8, 9N, 11A, 23B, 31, 35F. Median age was 62 years; 23 (92%) presented from a community residence; 12 (48%) were immunocompromised; and all had ≥1 major chronic medical condition. In-hospital outcomes: 0 deaths; 10 (40%) ICU admissions; 9 (36%) mechanical ventilation; 3 (12%) vasopressors; 3 (12%) pleural drainage procedure; 1 (4%) new renal-replacement-therapy.

Conclusions

IPD is a highly morbid disease in US adults, with most cases in this study caused by serotypes not in the current 13-valent pneumococcal conjugate vaccine.

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