What is Salmonella?

Salmonella is from a family of bacteria (Enterobacteriaceae) that can cause disease in warm- and cold-blooded animals.

Birds infected with the disease can see higher mortality rates, lesions and reduced overall economic value. Good management practices and reliable prevention and treatment options are essential to help maintain a healthy flock. Unfortunately, Salmonella has proven very adaptive.

Salmonella Classification

Salmonellaspecies are divided into serogroups

  • Salmonella enteritidis (SE) - Group D
  • Salmonella heidelberg - Group B
  • Salmonella typhimurium (ST) - Group B
  • Other species and serogroups are common

SE and ST are further divided into phage types:

  • Phage typing further differentiates isolates within a serotype
  • SE contains three inactivated phagetypes including 8, 13a and the highly pathogenic phage type 4
  • Phage typing can be used for tracking back food-borne illness


Salmonella negatively affects many animal species, including humans. Demand is a big reason for the number of today's outbreaks. There are simply more people on the planet, which mean more opportunity to contract a food-borne illness.

Related resources

Additional resources available for
on-farm Salmonella control and prevention for layers.


Visit the Related Resources for more information.