title: Tissue distribution of marbofloxacin after 'systemic' administration into the isolated perfused bovine udder.
abstract: Mammary glands taken at slaughter from healthy lactating cows were perfused in vitro with warmed and gassed Tyrode solution. Marbofloxacin was administered "systemically" via the perfusion fluid at concentrations similar to those measured in plasma following intravenous administration of 2mg/kg marbofloxacin. Samples from the perfusate were taken over a 24h period. Glandular tissue samples at different vertical distances from the teat up to the udder base were gathered from each of the four quarters after 3, 6, 12 and 24h. The marbofloxacin content of the tissue samples was analysed by high performance liquid chromatography with UV detection. The addition of marbofloxacin to the perfusion fluid produced median concentrations above the MIC90 (0.016microg/mL) against Escherichia coli at all glandular tissue sites measured after 3 and 6h with remarkable variations. Samples taken after 12 and 24h contained marbofloxacin in concentrations (median) of 0.22 (<0.05-0.32)microg/g and 0.13 (<0.05-0.16)microg/g. It is concluded that a systemic administration of marbofloxacin is well suited for the treatment of E. coli mastitis.
authors: Institute for Pharmacology, Toxicology and Pharmacy, University of Veterinary Medicine, Foundation, Bünteweg 17, D-30559 Hannover, Germany. manfred.kietzmann@tiho-hannover.de
authors: Manfred
authors: M
authors: Kietzmann
authors: Michael
authors: M
authors: Braun
authors: Marc
authors: M
authors: Schneider
authors: Rüdiger
authors: R
authors: Pankow
mesh_terms: D000818:Animals; D000900:Anti-Bacterial Agents / Q000493:pharmacokinetics*; D002417:Cattle; D005260:Female; D024841:Fluoroquinolones / Q000493:pharmacokinetics*; D008321:Mammary Glands, Animal / Q000378:metabolism*; D010477:Perfusion / Q000662:veterinary; D014018:Tissue Distribution
chemical_list: D000900:Anti-Bacterial Agents; D024841:Fluoroquinolones; C080260:marbofloxacin