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Typhoid epidemiology, diagnostics and the human challenge model.
MedLine Citation:
PMID:  24304980     Owner:  NLM     Status:  In-Data-Review    
PURPOSE OF REVIEW: Infection caused by ingestion of human-restricted Salmonella enterica serovars Typhi and Paratyphi predominantly affects the most impoverished sections of society. In this review, we describe recent advances made in estimating the burden of illness and the important role improved diagnostic tests may have in controlling infection and report the development of a new human challenge model of typhoid infection.
RECENT FINDINGS: Typhoid continues to be a major cause of morbidity, particularly in children and young adults in south east Asia, although accurate assessments are still hindered by the lack of reliable surveillance data. Recent reports of high rates of infection in Africa and the dominance of paratyphoid in several geographic areas are of particular concern. Diagnosis of enteric fever remains frustrated by the nonspecific clinical presentation of cases and the lack of test sensitivity. Methods to improve diagnostic accuracy are hindered by the incomplete understanding of immunobiological mechanisms of infection and lack of a suitable animal infection model.
SUMMARY: Enteric fever is a major global problem, the burden of which has only partially been recognized. Control strategies utilizing cheap accurate diagnostics and effective vaccines are urgently required, and their development should be accelerated by the use of a human challenge model.
Thomas C Darton; Christoph J Blohmke; Andrew J Pollard
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Current opinion in gastroenterology     Volume:  30     ISSN:  1531-7056     ISO Abbreviation:  Curr. Opin. Gastroenterol.     Publication Date:  2014 Jan 
Date Detail:
Created Date:  2013-12-05     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8506887     Medline TA:  Curr Opin Gastroenterol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  7-17     Citation Subset:  IM    
Oxford Vaccine Group, Centre for Clinical Vaccinology and Tropical Medicine, Department of Paediatrics, University of Oxford and the NIHR Oxford Biomedical Research Centre, Oxford, UK.
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