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Exposures Associated with Non-Typhoidal Salmonella Infections Caused by Newport, Javiana, and Mississippi Serotypes in Tennessee, 2013–2015: A Case-Case Analysis

1
Division of Epidemiology, Biostatistics, and Environmental Health, School of Public Health, University of Memphis, Memphis, TN 38152, USA
2
Department of Infectious Diseases, Center of Excellence for Influenza Research and Surveillance (CEIRS), St. Jude Children’s Research Hospital, Memphis, TN 38105, USA
3
Communicable and Environmental Diseases and Emergency Preparedness, Tennessee Department of Health, Nashville, TN 37243, USA
*
Author to whom correspondence should be addressed.
Pathogens 2020, 9(2), 78; https://doi.org/10.3390/pathogens9020078
Received: 12 November 2019 / Revised: 19 January 2020 / Accepted: 20 January 2020 / Published: 24 January 2020
Non-typhoidal Salmonella (NTS) infection (salmonellosis) is one of the most prevalent gastrointestinal diseases throughout the world. Human infections caused by Salmonella Newport, Javiana, and Mississippi serotypes have been observed to occur at higher rates on an annual basis in western Tennessee. The reason for the increased rate of NTS infection by these three serotypes in this region is not known. We conducted a case-case analysis to identify potential risk factors associated with the three Salmonella serotypes using FoodNet data, obtained from the Tennessee Department of Health, consisting of 1578 culture-confirmed salmonellosis cases in Tennessee from 2013 through 2015. Among all the exposure variables tested (254 in total), we found contact with pet treats or chews in the seven days prior to illness was the factor that was significantly associated with these serotypes compared to other serotypes (odds ratio adjusted = 3.0 (95% confidence intervals 1.6, 5.5), P < 0.0005). This study highlights the need for further investigation of potential exposures (other than pet treats or chews), including several possible environmental sources of NTS infection in humans. View Full-Text
Keywords: salmonellosis; non-typhoidal Salmonella (NTS); S. Newport; S. Javiana; S. Mississippi; case-case analysis salmonellosis; non-typhoidal Salmonella (NTS); S. Newport; S. Javiana; S. Mississippi; case-case analysis
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Mukherjee, N.; Nolan, V.G.; Dunn, J.R.; Banerjee, P. Exposures Associated with Non-Typhoidal Salmonella Infections Caused by Newport, Javiana, and Mississippi Serotypes in Tennessee, 2013–2015: A Case-Case Analysis. Pathogens 2020, 9, 78.

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