Complications of Listeria infection
Blood infection and meningitis are both complications of Listeria infection. Death is the most severe consequence of listeriosis.
For those persons who suffer a Listeria infection that does not resolve on its own, the complications (or sequelae) can be many. [4, 28] The most common is septicemia (bacterial pathogens in the blood, also known as bacteremia), with meningitis being the second most common. [4, 18] Other complications can include inflammation of the brain or brain stem (encephalitis), brain abscess, inflammation of the heart-membrane (endocarditis), and localized infection, either internally or of the skin. 
Death is the most severe consequence of listeriosis, and it is tragically common.  For example, based on 2009 FoodNet surveillance data, 89.2% of Listeria patients ended up in the hospital, the highest hospitalization rate for pathogenic bacterial infection.  In persons 50 years of age and older, there was a 17.5% fatality rate—also the highest relative to other pathogens. [10, 18]