title: [The influence of a monobactam antibiotic, aztreonam, and other antibiotics on blood coagulation in vitamin K-deficient rats].
abstract: The influence of aztreonam (AZT), a new monobactam antibiotic, on blood coagulation was compared with latamoxef (LMOX), cefoperazon (CPZ), cefotetan (CTT) and ampicillin (ABPC). These antibiotics were administered intraperitoneally once a day for 7 days to rats fed a vitamin K-deficient diet. On the 8th day, blood coagulation activity and bacteria in the caecum were observed. 1) One hundred mg/kg and 300 mg/kg of LMOX prolonged the blood coagulation time and decreased normal prothrombin in a dose-dependent manner. CPZ, CTT and ABPC (300 mg/kg each) decreased both of these parameters, but not as much as LMOX did. AZT (300 mg/kg) had no effect on these parameters. 2) Three hundred mg/kg of ABPC and LMOX decreased the viable cell counts of all aerobic G (+), aerobic G (-), and anaerobic bacteria and yeast, while AZT decreased only aerobic G (-) bacteria. These results suggest that AZT may be less likely to induce hypoprothrombinemia than other antibiotics in clinical use.
authors.affiliation: Department of Pharmacology, Tokyo Research Laboratories, Eisai Co., Ltd., Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Akiyama
authors.forename: K
authors.initials: K
authors.lastname: Hara
authors.forename: Y
authors.initials: Y
authors.lastname: Kato
authors.forename: K
authors.initials: K
authors.lastname: Takizawa
authors.forename: M
authors.initials: M
authors.lastname: Sato
authors.forename: T
authors.initials: T
authors.lastname: Tajima
mesh_terms: D000667:Ampicillin / Q000008:administration & dosage / Q000009:adverse effects; D000818:Animals; D001398:Aztreonam / Q000008:administration & dosage / Q000009:adverse effects*; D001777:Blood Coagulation / Q000187:drug effects*; D002432:Cecum / Q000382:microbiology; D002511:Cephalosporins / Q000008:administration & dosage / Q000009:adverse effects; D015169:Colony Count, Microbial; D004305:Dose-Response Relationship, Drug; D007020:Hypoprothrombinemias / Q000139:chemically induced*; D007274:Injections, Intraperitoneal; D008297:Male; D051381:Rats; D011919:Rats, Inbred Strains
chemical_list: D002511:Cephalosporins; D000667:Ampicillin; D001398:Aztreonam