The antibiotic-resistant strain of Salmonella Typhi, the primary cause of typhoid, emerged within the last 30 years and may represent an ongoing, previously unrecognized epidemic
[natureasia.com]
Both diseases contain the word ‘typhi’ in their official names. Rickettsia typhi is the proper name of typhus and it’s Salmonella typhi for typhoid.
[passporthealthusa.com]
Serological tests for Salmonella enterica serovar Typhi, Borrelia recurrentis, Coxiella burnetii, Bartonella quintana, Francisella tularensis, and Anaplasma phagocytophilum
[doi.org]