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Chapter 26 - Typhoid, Paratyphoid and Non-typhoid Salmonella Infections

from Section 5 - Bacterial Infections

Published online by Cambridge University Press:  18 June 2025

David Mabey
Affiliation:
London School of Hygiene and Tropical Medicine
Martin W. Weber
Affiliation:
World Health Organization
Moffat Nyirenda
Affiliation:
London School of Hygiene and Tropical Medicine
Dorothy Yeboah-Manu
Affiliation:
Noguchi Memorial Institute for Medical Research, University of Ghana
Jackson Orem
Affiliation:
Uganda Cancer Institute, Kampala
Laura Benjamin
Affiliation:
University College London
Michael Marks
Affiliation:
London School of Hygiene and Tropical Medicine
Nicholas A. Feasey
Affiliation:
Liverpool School of Tropical Medicine
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Summary

Salmonella infections are endemic in sub-Saharan Africa (SSA). They can be divided into typhoidal (caused by Salmonella Typhi and S. Paratyphi A) and non-typhoidal Salmonella (NTS) (i.e. S. Typhimurium and S. Enteritidis) and are amongst the leading cause of invasive bloodstream infections in Africa. In 2017, it was estimated that there were 535 000 cases of invasive non-typhoidal Salmonella (iNTS) disease, and 14.3 million cases of typhoid and paratyphoid fever globally (see Fig. 26.1). Whilst typhoid is responsible for a greater number of infections, iNTS disease is more commonly a severe illness. iNTS disease is a neglected tropical disease commonly seen in individuals with underlying risk factors (age, malnutrition, malaria, sickle cell disease and HIV). Blood culture is the gold standard for diagnosis for invasive bloodstream Salmonella infections, but due to limitations in diagnostic capacity in Africa, diagnosis of invasive Salmonella infection is frequently made on clinical grounds in febrile patients. Emergence of antimicrobial resistance (AMR) has made clinical management more challenging and is a major public health concern.

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Publisher: Cambridge University Press
Print publication year: 2025

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References

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von Kalckreuth, V. et al. (2016) The Typhoid Fever Surveillance in Africa Program (TSAP): clinical, diagnostic, and epidemiological methodologies. Clinical Infectious Diseases, 62, s9s16. doi: 10.1093/cid/civ693.CrossRefGoogle ScholarPubMed
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