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Cefquinome
Cefquinome is a fourth-generation ] with pharmacological and antibacterial properties valuable in the treatment of coliform mastitis and other infections. It is only used in veterinary applications. == Properties == Cefquinome is resistant to beta-lactamase. Chemically, its zwitterionic structure can facilitate rapid penetration across biological membranes, including porins of bacterial cell walls. Plus, it has a higher affinity to target penicillin-binding proteins. The reactive site is a beta-lactam nucleus, while the main peripheral functional groups are a quaternary quinolinium, an aminothiazolyl moiety and an unusual ''O''-alkylated oxime. Cefquinome acts by inhibition of the cell wall synthesis, but it has a relatively short half-life of about 2.5 hours. It is less than 5% protein bound and is excreted unchanged in the urine.〔Intervet, "Cephaguard Injection Data Sheet," http://www.intervet.co.uk/Products_Public/Cephaguard_Injection/090_Product_Datasheet.asp〕
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