Aids in diagnosis of certain febrile diseases such as salmonellosis, brucellosis and rickettsial diseases Francisella Tularensis Antigen contains 0.5% formaldehyde in place of the phenol Febrile Control Antisera are preparations of rabbit antiserum with 30% to 50% glycerin as preservative Available in vials of 5mL For in vitro Diagnostic Use.