The FHW Antigen+FeLV Antigen+FIV Antibody Combo Rapid Test Cassette (Whole Blood/Serum/Plasma) is a combined test cassette to differentially diagnose the presence of Feline heartworm antigen (FHW Ag), Feline Leukemia Virus antigen (FeLV Ag) or Feline Immunodeficiency antibody (FlV Ab) in feline whole blood, serum and plasma.