Salmonella Typhi Stool Shedding by Patients With Enteric Fever and Asymptomatic Chronic Carriers in an Endemic Urban Setting
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Darton, Thomas C
Meiring, James E
Sarker, Protup Kumer
Biswas, Prasanta Kumar
Bhuiyan, Md Amirul Islam
Rajib, Nazmul Hasan
Tonks, Susan
Pollard, Andrew J
Clemens, John D
Qadri, Firdausi
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Abstract
The burden of Salmonella Typhi shedding in stool and its contribution to transmission in endemic settings is unknown. During passive surveillance S. Typhi shedding was seen during convalescence in 332 bacteremic typhoid patients although none persisted at one-year follow-up. Anti-Vi-IgG titres were measured in age-stratified cohort of serosurveillance participants. Systematic stool sampling of 303 participants with high anti-Vi-IgG titres identified one asymptomatic carrier shedding. These findings suggest ongoing S. Typhi transmission in this setting is more likely to occur from acute convalescent cases although better approaches are needed to identify true chronic carriers in the community to enable typhoid elimination.
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The Journal of Infectious Diseases
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224
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Supplement_7
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© The Author(s) 2021. Published by Oxford University Press for the Infectious Diseases Society of America. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
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Subject
Biological sciences
Health sciences
Bacteriology
Typhoid fever
chronic carriers
stool shedding
transmission of S. Typhi
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Khanam, F; Darton, TC; Meiring, JE; Sarker, PK; Biswas, PK; Bhuiyan, MAI; Rajib, NH; Tonks, S; Pollard, AJ; Clemens, JD; Qadri, F, Salmonella Typhi Stool Shedding by Patients With Enteric Fever and Asymptomatic Chronic Carriers in an Endemic Urban Setting, The Journal of Infectious Diseases, 2021, 224 (Supplement_7), pp. S759–S763