My bottle of Corid has mold growing in the cap!?

[casportpony]

Source: http://www.drugs.com/vet/sulmet-drinking-water-solution-12-5.html
For the control of:
Chickens: Infectious Coryza (Avibacterium paragallinarum)
Coccidiosis (Eimeria tenella, Eimeria necatrix)
Acute Fowl Cholera (Pasteurella multocida)
Pullorum Disease (Salmonella Pullorum)
Turkeys: Coccidiosis (Eimeria meleagrimitis, Eimeria adenoeides)

Chickens get nine types coccidiosis and turkey get seven.

-Kathy