cefotaxime and Joint-Diseases

Cefotaxime powder was diluted with sterile water to a concentration of 100 mg/mL. The volume of solution was adjusted for each experimental horse to provide a total dose of 15, 20, and 25 mg/kg and was administered by infusion through a jugular vein catheter over a 10-min period. All three doses were administered to each of the six experimental horses at three different times. Cefotaxime concentrations in plasma and synovial fluid samples were measured by high-performance liquid chromatography (HPLC). Standard compartmental analysis techniques and the WinSAAM modeling program were used to determine standard pharmacokinetic parameters for cefotaxime. The plasma and synovial fluid data from the five horses administered the 25 mg/kg dose was analyzed. Plasma cefotaxime concentrations appeared to be linearly related to dose infused and declined in parallel, suggesting linear drug kinetics. Moreover, cefotaxime concentrations declined monotonically suggesting that its disposition kinetics could essentially be described by a one-compartment model rather than the fact that sampling occurred after the infusion was discontinued. Maximum concentration of cefotaxime in plasma occurred immediately after cessation of the infusion. Minimum inhibitory concentrations were determined for Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, and Klebsiella pneumoniae, common isolates from septic arthritis in horses. Based on our pharmacokinetic data, a regimen of 25 mg/kg administered i.v. every 6 h appears appropriate for susceptible joint infections in adult horses.

Topics: Animals; Anti-Bacterial Agents; Arthritis, Infectious; Cefotaxime; Chromatography, High Pressure Liquid; Drug Administration Schedule; Escherichia coli; Horse Diseases; Horses; Infusions, Intravenous; Joint Diseases; Klebsiella pneumoniae; Microbial Sensitivity Tests; Pseudomonas aeruginosa; Staphylococcus aureus; Synovial Fluid

In an open, randomised comparative study, 23 patients with bone, joint or soft tissue infections were treated with ampicillin 2g plus sulbactam 1g 3 times a day or cefotaxime 2g 3 times a day as an initial 2-week therapy. Monoinfections with Staphylococcus aureus were the most common bone or joint infections. Clinical cure or improvement 2 weeks after the end of therapy was observed in all 13 patients treated with sulbactam/ampicillin and in 7 of the 8 patients evaluated for efficacy after treatment with cefotaxime. Most organisms identified before the onset of therapy were susceptible to the antibiotic randomly selected for therapy, although the majority of infections due to beta-lactamase-producing staphylococci could not have been treated with ampicillin without sulbactam. Treatment failed to eradicate S. aureus in 1 patient from each group. In addition, S. aureus infection recurred in 2 patients in the cefotaxime group within 2 weeks after the end of therapy. No serious side effects were observed.

Topics: Adolescent; Adult; Aged; Ampicillin; Bacteria; Bacterial Infections; beta-Lactamases; Bone Diseases; Cefotaxime; Drug Combinations; Female; Humans; Joint Diseases; Male; Microbial Sensitivity Tests; Middle Aged; Sulbactam

The penetration of oral cefixime into the synovial fluids of 16 patients (mean age, 50.6 years) who underwent joint taps for rheumatic noninfectious disorders was examined. The patients were each given a single dose (400 mg) 2 to 24 h prior to the tap. Cefixime concentrations in serum and joint fluid samples were measured by high-performance liquid chromatography, and the bactericidal activities of these fluids against three isolates each of Haemophilus influenzae and Escherichia coli were examined. The highest concentrations in serum and synovial fluid were achieved 4 h following drug intake, the mean values being 2.8 and 2.03 micrograms/ml, respectively. Effective bactericidal activities (bactericidal titer, > 1:2) against E. coli and H. influenzae were demonstrated in serum and joint fluid up to 10 h following oral intake of cefixime. These results suggest that cefixime penetrates well into joint fluid, achieving levels above the MIC for E. coli lasting as long as 10 h and levels above the MIC for H. influenzae lasting up to 24 h after administration. Good bactericidal activity against susceptible bacterial isolates was observed for at least 10 h after dosing.

Topics: Adult; Aged; Cefixime; Cefotaxime; Cephalosporins; Escherichia coli; Female; Haemophilus influenzae; Humans; Joint Diseases; Male; Middle Aged; Rheumatic Diseases; Synovial Fluid; Time Factors

Topics: Adolescent; Adult; Aged; Bacterial Infections; Bone Diseases; Cefotaxime; Cephalosporins; Female; Humans; Joint Diseases; Male; Middle Aged