Ciprofloxacin (Cipro) is a broad-spectrum fluoroquinolone antibiotic that is used to treat a variety of bacterial infections in humans. Baytril is the veterinary-labeled form of this same drug. Since this drug is a fluoroquinolone-class antibiotic, it is not approved for use in poultry that are not kept as pets.
Ciprofloxacin has good activity against most gram-negative bacteria, including Enterobacer, E.coli, Klebsiella, Pasteurella, Proteus, Salmonella, and sometimes Pseudomonas. It also has good activity against some gram-positive bacteria (Staphylococcus).
Caution: Should not be used in growing birds due to risk of damage to cartilage.