Infectious Diseases 2021

Infectious Diseases 2021

CDC: Salmonella outbreaks linked to backyard poultry

22 May, 2021

CDC and public health officials in many states are collecting different types of data to investigate multistate outbreaks of Salmonella infections with serotypes Enteritidis, Hadar, and Infantis.
Epidemiologic and laboratory data show that contact with backyard poultry is making people sick.
As of May 20, 2021, a total of 163 people infected with one of the outbreak strains have been reported from 43 states. Illnesses started on dates ranging from February 12, 2021, to April 25, 2021.
Sick people range in age from less than 1 to 87 years, with a median age of 24 years, and 58% are female. Of 109 people with information available, 34 (31%) have been hospitalized. No deaths have been reported.
The true number of sick people in an outbreak is likely much higher than the number reported, and the outbreak may not be limited to the states with known illnesses. This is because many people recover without medical care and are not tested for Salmonella. 
Of the 92 people interviewed, 81 (88%) reported contact with backyard poultry before getting sick.
Whole Genome Sequencing (WGS) showed that bacteria from sick people’s samples are closely related genetically. 
On April 15, public health officials in Ohio collected samples from a sick person’s ducklings for testing. WGS showed that the bacteria, Salmonella serotype Hadar, in duckling poop are closely related to bacteria from sick people. This means that people likely got sick from contact with backyard poultry.