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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
immunology and microbiology
Enhanced diagnosis of pneumococcal bacteremia using antigen-and molecular-based tools on blood specimens in Mali and Thailand: A prospective surveillance study
American Journal of Tropical Medicine and Hygiene, Volume 94, No. 2, Year 2016
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Description
Prior antibiotic use, contamination, limited blood volume, and processing delays reduce yield of blood cultures for detection of Streptococcus pneumoniae. We performed immunochromatographic testing (ICT) on broth from incubated blood culture bottles and real-time lytA polymerase chain reaction (PCR) on broth and whole blood and compared findings to blood culture in patients with suspected bacteremia. We selected 383 patients in Mali and 586 patients in Thailand based on their blood culture results: 75 and 31 were positive for pneumococcus, 100 and 162 were positive for other pathogens, and 208 and 403 were blood culture negative, respectively. ICT and PCR of blood culture broth were at least 87% sensitive and 97% specific compared with blood culture; whole blood PCR was 75-88% sensitive and 96-100% specific. Pneumococcal yields in children < 5 years of age increased from 2.9% to 10.7% in Mali with > 99% of additional cases detected by whole blood PCR, and from 0.07% to 5.1% in Thailand with two-thirds of additional cases identified by ICT. Compared with blood culture, ICT and lytA PCR on cultured broth were highly sensitive and specific but their ability to improve pneumococcal identification varied by site. Further studies of these tools are needed before widespread implementation. © 2016 by The American Society of Tropical Medicine and Hygiene.
Authors & Co-Authors
Moïsi, Jennifer C.
United States, Atlanta
National Center for Immunization and Respiratory Diseases
Moore, Matthew R.
United States, Atlanta
National Center for Immunization and Respiratory Diseases
da Glória Carvalho, María Costa
United States, Atlanta
National Center for Immunization and Respiratory Diseases
Sow, Samba Ousmane
United States, Atlanta
National Center for Immunization and Respiratory Diseases
Siludjai, Duangkamon
United States, Atlanta
National Center for Immunization and Respiratory Diseases
Deloria Knoll, Maria
United States, Atlanta
National Center for Immunization and Respiratory Diseases
Tapia, Milagritos D.
United States, Atlanta
National Center for Immunization and Respiratory Diseases
Baggett, Henry C.
United States, Atlanta
National Center for Immunization and Respiratory Diseases
Statistics
Citations: 5
Authors: 8
Affiliations: 1
Identifiers
Doi:
10.4269/ajtmh.15-0431
ISSN:
00029637
Research Areas
Health System And Policy
Maternal And Child Health
Study Design
Cohort Study
Study Locations
Mali