The deadliest food bacteria is Listeria.
Listeria causes a disease called listeriosis, although listeriosis is less common than other kinds of food borne illnesses and the number of people affected by listeriosis as a result of listeria is much smaller, but it's still overall the most deadly food bacteria.
Other most deadliest food bacteria's are Vibrio vulnificus, Clostridium botulinum, E. coli and Salmonella.
Vibrio vulnificus is known to be extremely dangerous, especially in people with underlying health conditions like chronic liver disease.
Clostridium botulinum causes botulism, which is a rare but also fatal paralytic illness that is usually linked to improperly fermented foods or improperly foods.
Specific strains of E. coli like \(O157:H7\) cause severe and sometimes even fatal illness, which includes kidney failure or hemolytic uremic syndrome.
Listeria has a high fatality rate which is up to 12.8% or higher and causes invasive infections in the body like meningitis, especially affecting people who are elderly or those who have a compromised immune system.
Salmonella is the leading cause of foodborne related deaths as well as hospitalizations, and it's often associated with eating raw or undercooked meat, eggs and poultry.
Listeria has a hospitalization rate of 90% and is the 3rd leading cause of death in people for foodborne illnesses.
Salmonella causes the most deaths although they are not as common.
And norovirus causes the most total illnesses as well as the flu.
The flu can also be deadly in people who have a compromised immune system, young kids and babies as well as older adults.