Paratyphoid, also known as enteric fever, is a disease caused by the bacterium Salmonella enterica serovar Paratyphi. Paratyphoid fever is a similar disease to typhoid fever but generally milder.

The disease is almost exclusively acquired abroad through the ingestion of heavily contaminated food and water.

Typhoid and paratyphoid bacteria are passed in the faeces and urine of infected people. People become infected by eating food or drinking beverages that have been handled by an infected person, or by drinking water that has been contaminated by sewage containing the bacteria. Good hygiene and proper sanitation prevent the spread of paratyphoid and typhoid.