Cefquinome Products | Cleanchem - Cefquinome is a fourth-generation cephalosporin antibiotic used in veterinary medicine to treat infections in livestock, particularly in cattle and swine. It is effective against both Gram-positive and Gram-negative bacteria. Cefquinome is typically used to treat respiratory infections, mastitis, and other bacterial diseases in animals. Side effects are rare but may include gastrointestinal upset and injection site reactions.