ABSTRACT The seroprevalence studies of Plasmodium falciparum, Mycobacterium tuberculosis and Samonella typhi, HIV and co-infections by the four pathogens were carried out among patients attending Don Bosco Medical centre Akure and Ondo State Specialist Hospital, Akure. Venous blood were collected from a total of 500 randomly selected patients aged 1 to ≥ 91 years that attended the hospitals for routine medical check up. Diagnostic test kits (“Determine” and ‟Unigo...