Infectious Diseases 2021

Infectious Diseases 2021

Global spread of Salmonella Enteritidis

Nat Comm 2021, 12:5109 26 August, 2021

In the 1980s, simultaneous increase of Salmonella enterica serotype Enteritidis infections linked to poultry occurred in North America, South America, and Europe. By the late 1980s and the 1990s, Salmonella Enteritidis had spread to the poultry production systems in Asia and Africa. The pandemic subsequently declined in the late 1990s in the US and the United Kingdom (UK), but Salmonella Enteritidis remains a substantial problem for poultry production and public health.
Between 2015 and 2018, Salmonella Enteritidis contaminated eggs caused the largest known salmonellosis outbreak in Europe, resulting 1,209 reported cases in 16 countries. Decades after the inception of the pandemic, how the pathogen simultaneously increased in many parts of the world remained “a central and unsolved mystery”.
A new study noticed a spatiotemporal coincidence between the onset of the Salmonella Enteritidis pandemic and the beginning of global breeding stock consolidation, both of which first occurred in America and Europe in the 1980s and subsequently affected other continents. The researchers therefore hypothesize that centralized sourcing and international trade of Salmonella Enteritidis-infected breeding stocks is a parsimonious explanation for the synchronized and expansive spread of Salmonella Enteritidis.