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Volume 32, Number 9—September 2026

Research

Clustering and Source Association of Clinical and Nonclinical Listeria monocytogenes Isolates, New York, USA, 2000–20211

Hilal Samut, Damaris V. Mendez-Vallellanes, Hannah Hoyt, Samantha E. Wirth, Lisa Mingle, Brian D. Sauders, Gregory A. Deiulio, Alyssa W. Dickey, Maria L. Ishida, William J. Wolfgang, Kimberlee A. Musser, Martin Wiedmann, and Renato H. OrsiComments to Author 
Author affiliation: Cornell University, Ithaca, New York, USA (H. Samut, M. Wiedmann, R.H. Orsi); New York State Department of Health, Wadsworth Center, Albany, New York, USA (D.V. Mendez-Vallellanes, H. Hoyt, S.E. Wirth, L. Mingle, W.J. Wolfgang, K.A. Musser); New York State Department of Agriculture and Markets, Albany (B.D. Sauders, G.A. Deiulio, A.W. Dickey, M.L. Ishida)

Main Article

Table 4

Association between food category and presence of inlA premature stop codon among 313 Listeria monocytogenes food isolates in study of clustering and source association of clinical and nonclinical L. monocytogenes isolates, New York, USA, 2000–2021*

Food category OR (95% CI)† FDR-adjusted p value
Raw dairy 0.01 (0.00–0.24) <0.001
Processed dairy 0.12 (0.02–0.65) 0.006
Produce 0.18 (0.03–0.98) 0.064
Pasta 0.20 (0.01–3.76) 0.474
Raw fish 0.56 (0.20–1.49) 0.462
Raw meat 0.95 (0.38–2.36) 1.000
Salad 1.18 (0.30–4.58) 1.000
Sandwich 1.52 (0.43–5.42) 0.886
Processed fish 1.55 (0.91–2.65) 0.270
Processed meat 4.93 (2.94–8.27) <0.001
Nuts 5.58 (0.22–138.02) 0.483

*FDR, false discovery rate; OR, odds ratio. †OR >1 indicates overrepresentation of inlA premature stop codon presence in the corresponding food category. Associations were assessed using 2-sided Fisher exact test followed by FDR correction for multiple comparisons. A continuity correction of 0.5 was applied to all cells to allow for OR calculation and ensure comparability across categories.

Main Article

1Preliminary results from this study were presented at the 2025 International Association for Food Protection Conference; July 27–30, 2025; Cleveland, Ohio, USA.

Page created: July 30, 2026
Page updated: August 17, 2026
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