»Histoplasmin conforms to the regulations of the FDAconcerning biologics (see
Biologics á1041ñ).It is a clear,colorless,sterile solution containing standardized culture filtrates of
Histoplasma capsulatumgrown on liquid synthetic medium.It has a potency of the 1:100dilution equivalent to and determined in terms of the Histoplasmin Reference diluted 1:100tested in guinea pigs.It may contain a suitable antimicrobial agent.