Typhoid (Enteric Fever) Doctor Near Me Enteric fever is characterized by severe systemic illness with fever and abdominal pain. The organism classically responsible for the enteric fever syndrome is Salmonella enterica serotype Typhi ( formerly S. typhi ). Other salmonella serotypes, particularly S. enterica serotypes Paratyphi A, B, or C, can cause a similar syndrome. The term enteric fever is a collective term that refers to both typhoid and paratyphoid fever. Relapse of enteric fever after clinical cure can occur; in such cases, it typically occurs two to three weeks after resolution of fever. The risk of relapse depends on the antibiotic used to treat the initial infection. Hence the treatment must always been done under supervision of a specialist. The patient should approach a specialist at the earliest onset of symptoms. Enteric fever results from the ingestion of contaminated food or water. Access to fresh water, prioritization of sanitation and hygiene, and education about food and water safety are essential strategies. The WHO recommends implementation of national typhoid vaccination programs in settings where typhoid is endemic. Of available vaccines, it prefers typhoid conjugate vaccines for their efficacy and safety, as well as their greater and more durable immunogenicity compared with other vaccines. Several typhoid vaccines have been licensed, although they are not universally available. None are completely effective against S.Typhi and none have been demonstrated to provide protection against paratyphoid fever caused by S. Paratyphi A. Vi typhoid conjugate vaccines (TCV) – These vaccines consist of the Vi polysaccharide antigen linked to various carrier proteins. Typbar – TCV is the representative vaccine of this type; it is administered as a single intramuscular dose. The need for revaccination for continued protection is uncertain. Ty21a vaccine – This is a live oral vaccine that consists of an S.Typhi strain Ty21a. It is administered in three to four doses taken on alternate days. The revaccination is recommended every threeto five years.