Cefazolin (also known as cefazoline or cephazolin) is a semi-synthetic first-generation injectable cephalosporin. Cefazolin has broad-spectrum antibiotic action due to inhibition of bacterial cell wall synthesis. It is used for the treatment of a number of bacterial infections in poultry, especially against those caused by staphylococci and streptococci species of Gram positive bacteria.
Note: Cephalosporins may disturb the normal intestinal microflora of poultry, particularly when administered orally and at high doses.