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| Content Provider | PubMed Central |
|---|---|
| Author | Tawara, S. Matsumoto, S. Kamimura, T. Goto, S. |
| Abstract | The effect of protein binding in serum of eight cephem antibiotics (ceftazidime, ceftizoxime, cefotiam, cefmetazole, cefpiramide, cefazolin, cefuzonam, ceftriaxone) on their therapeutic efficacies was examined in mice with experimentally induced intraperitoneal infections or pneumonia. The relationship among therapeutic activity, in vitro antibacterial activity, total or free (unbound) levels in serum, and homogenized whole lung levels was investigated. In the intraperitoneal infection caused by Staphylococcus aureus or Klebsiella pneumoniae, the 50% effective doses (ED50s) of the cephem antibiotics correlated with the area under the concentration-time curve (AUC) values of free levels in serum and the MICs but not with those of total levels in serum. A linear relationship was seen between 1/ED50 values and AUC of free levels in serum/MIC values. On the other hand, in mice with pneumonia caused by K. pneumoniae, the number of bacteria in the lung closely correlated with the AUC of the antibiotic concentration in lung tissue. There was a direct correlation between the levels in lung tissue and total levels in serum but not free levels in serum. The cephem antibiotics tested in this study were bound only slightly to homogenates of mouse lung. These results indicate that the effect of protein binding in serum on therapeutic efficacy against intraperitoneal infection differs from that against pulmonary infection. |
| Starting Page | 17 |
| File Format | |
| ISSN | 10986596 |
| e-ISSN | 10986596 |
| Journal | Antimicrobial Agents and Chemotherapy |
| Issue Number | 1 |
| Volume Number | 36 |
| Language | English |
| Publisher Date | 1992-01-01 |
| Access Restriction | Open |
| Subject Keyword | Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Infectious Diseases Pharmacology Pharmacology (medical) |
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