Typhoid infection is acquired through contaminated food or water. Most UK cases are in those visiting friends and relatives in countries of the Indian subcontinent.
Typhoid and paratyphoid are infections acquired by the ingestion of food or water contaminated by the bacteria Salmonella Typhi or Salmonella Paratyphi. They cause very similar diseases collectively known as enteric fever and mainly affect low-income areas of the world where sanitation is poor and clean drinking water is not widely available. The majority of global cases of the disease occur in Asia, but the disease continues to be a concern in other areas including Africa and parts of Central and South America.
The majority of travel-related infections in the UK occur in those visiting friends and relatives in countries of the Indian subcontinent (Bangladesh, India, and Pakistan).