Conversation: The conversation between human and AI assistant.
[|Human|] Hi, My Widal test (tube method) results are Salmonella typhi, O(TO) Salmonella typhi, H(TH) =320 ----Reference Salmonella paratyphi A,H Salmonella paratyphi B,H  What is the meaning of the figure 320 in above result please.
[|AI|]  Hello, Welcome to Chat Doctor, Widal test is a screening test for typhoid fever, and it is not a diagnostic test. Tier of Salmonella type H 320 suggests that there is a typhoid infection but if there is a rising tier then only it is suggestive of typhoid fever. Typhoid fever is diagnosed based on the fever for how many days. Tidal test is used during the second week of fever. The typhoid fever is best diagnosed by blood culture, urine culture and stool culture. The rising titles are suggestive of presence of typhoid infection in the body. Thank you.