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Disclaimer: Early release articles are not considered as final versions. Any changes will be reflected in the online version in the month the article is officially released.

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

Figure 2

Comparison of the relative frequency of Listeria monocytogenes CCs among clinical and nonclinical isolates in study of clustering and source association of clinical and nonclinical L. monocytogenes isolates, New York, USA, 2000–2021. Each bubble represents CCs that were found to be significantly overrepresented among either clinical or nonclinical isolates (Table 1). Diagonal reference line indicates equal frequency in clinical and nonclinical isolates; CCs above the line were common in clinical isolates, whereas CCs below were common in nonclinical isolates. CC, clonal complex.

Figure 2. Comparison of the relative frequency of Listeria monocytogenes CCs among clinical and nonclinical isolates in study of clustering and source association of clinical and nonclinical L. monocytogenes isolates, New York, USA, 2000–2021. Each bubble represents CCs that were found to be significantly overrepresented among either clinical or nonclinical isolates (Table 1). Diagonal reference line indicates equal frequency in clinical and nonclinical isolates; CCs above the line were common in clinical isolates, whereas CCs below were common in nonclinical isolates. CC, clonal complex.

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.

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Page updated: August 17, 2026
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