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Investigating Foodborne Transmission of Salmonella Typhi and Contamination Sources
Author: Kungu Erisa
Publisher: NEWPORT INTERNATIONAL JOURNAL OF PUBLIC HEALTH AND PHARMACY (NIJPP)
Published: 2025
Section: School of Pharmacy
Abstract
Salmonella enterica serovar Typhi (S. Typhi), the etiological agent of typhoid fever, is predominantly transmitted
through the fecal-oral route, with contaminated food and water being major vehicles. While waterborne
transmission has been well-documented, increasing evidence points to foodborne pathways playing a significant role
in endemic and epidemic outbreaks, especially in low- and middle-income countries (LMICs). This review explores
the mechanisms of foodborne S. Typhi transmission, identifies critical contamination points across the food supply
chain, and evaluates epidemiological data from outbreaks. Key contamination sources include poor sanitation in food
production, unhygienic food handling, improper storage, and cross-contamination in households and street food
settings. Surveillance studies, molecular typing methods, and whole-genome sequencing have enhanced
understanding of S. Typhi transmission dynamics, aiding in outbreak detection and source attribution. The review
highlights the need for integrated food safety strategies, improved hygiene practices, and regulatory interventions
to curb foodborne typhoid transmission and protect public health.