Salmonellosis is a symptomatic infection caused by bacteria of the "Salmonella" type. A health issue associated with eggs is contamination by pathogenic bacteria, such as "Salmonella enteritidis". Eggs are susceptible to "Salmonella" contamination. Pythons are disease vectors for multiple illness, including Salmonella, Chlamydia, Leptospirosis, Aeromoniasis, Campylobacteriosis, and Zygomycosis. It is often used to differentiate enteric bacteria including "Salmonella" and "Shigella". The incident constituted one of the largest institutional outbreaks of salmonella poisoning in US history. Typhoid fever is a human-specific disease caused by the bacterium "Salmonella typhi". Typhoid fever is an ailment caused by the bacterium "Salmonella enterica" ser. Risk factors for Salmonella infections include a variety of foods. Infection with nontyphoidal serotypes of "Salmonella" generally results in food poisoning. Unlike other strains of "Salmonella", no animal carriers of typhoid are known. Since 2011, Denmark has had zero cases of human salmonella poisoning. The cause is the bacterium "Salmonella enterica" subsp. In bacteria, 90% of proteins involved in central metabolism of "Salmonella enterica" are acetylated. Due to being considered sporadic, between 60% to 80% of salmonella infections cases go undiagnosed.