You can buy 1 pack/set containing 8 vials and can be purchased individually (indicate the type of widal antigen if buying a unit). Contains 5ml from the Evogen brand.
Widal Salmonella Evogen
Widal is a liquid for conducting tests to help diagnose suspected typhoid fever or also known as typhoid. There are 2 types of widal antigens, namely O antigens (O, OC, OB, OA) which are somatic antigens and H antigens (H, HA, HB, HC) which are flagella antigens or bacterial locomotion.