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Feb 3, 2026

Celebrating 30 Years of PulseNet: How It Detects Disease—and Saves Lives

  • Food Safety
  • Foodborne Disease
Written by:
By Donna Campisano, specialist, Communications, APHL
An APHL Platinum-Level Corporate Member

In 1993, more than 700 people were sickened (and four died) after eating at a fast-food restaurant chain. It took investigators 39 days to determine that the illnesses were connected and more than a month to find the thing that was making people sick: hamburgers contaminated with E. coli.

Food safety experts and other scientists knew there had to be a faster way to detect and link outbreaks. They determined that if public health laboratories could each conduct the same kind of DNA analysis on bacteria—and then share the data—dots could be connected and outbreaks could be identified sooner.

And so, PulseNet was born.

Launched in 1996, PulseNet, developed in partnership with APHL, US Centers for Disease Control and Prevention (CDC), other federal partners and four state public health labs, is a national laboratory network that analyzes a pathogen’s unique DNA fingerprint to detect and connect outbreaks. PulseNet uses whole genome sequencing to sequence bacterial cultures that have been isolated from human, animal, food and environmental samples. The resulting data are published to a national database known as PulseNet 2.0. Microbiologists and epidemiologists from around the country can access the database and determine if there are similarities that indicate cases are related and even share a common source of infection.

PulseNet enables investigators to identify eight illness-causing pathogens—from Campylobacter to Vibrio parahaemolyticus—and pinpoint outbreak clusters in near real-time. Investigations that used to take weeks, for example, can now take only days. That quick turnaround time is essential to saving lives.

CDC reports that in the 30 years since PulseNet has been in action, over 1 billion pounds of contaminated food have been recalled and an estimated 270,000 foodborne illnesses associated with three common illness-causing bacteria—Salmonella, E. coli and Listeria—have been prevented. Scientists are constantly working to advance laboratory and data analysis tools used to investigate foodborne and other outbreaks. By developing new technologies such as PulseNet 2.0, the newly implemented data analysis platform, PulseNet continues to enhance its ability to detect and prevent additional illnesses.

In celebration of PulseNet’s milestone birthday, we rounded up stories illustrating the tremendous impact the network has had on disease surveillance and outbreak detection. Read on to learn how each one underscores PulseNet’s vital contribution to human, animal and environmental health.

 

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