Salmonella REP Strain Notices

Overview

Some enteric bacterial strains cause acute outbreaks linked to specific sources.

Other strains, referred to as reoccurring, emerging, or persisting (REP) strains, can reoccur and periodically cause acute outbreaks.

They can also emerge and increase in frequency or persist and cause illnesses over periods of months or years, despite investigation and prevention efforts.

The notices linked below provide information and data on REP strains of Salmonella bacteria, including epidemiologic, laboratory, and antimicrobial resistance data.

What is a REP strain?

Learn more about REP strains if you are unfamiliar with them.
Content Source
National Center for Emerging and Zoonotic Infectious Diseases (NCEZID)
About This Page
Published: December 5, 2024
Updated: August 17, 2026

This page was last updated on this date. Updates may include minor edits, image changes, or other modifications to page content.

Reviewed: August 17, 2026

The information on this page was last reviewed by subject matter experts to ensure accuracy.