Safety and efficacy of intravenous tigecycline in subjects with secondary bacteremia: pooled results from 8 phase III clinical trials.
BACKGROUND
Tigecycline is effective in the treatment of complicated skin/skin-structure infection (cSSSI), complicated intraabdominal infection (cIAI), and community-acquired bacterial pneumonia (CAP), but its efficacy in subjects with secondary bacteremia is unknown.


METHODS
Pooled data from subjects enrolled for treatment of cSSSI, cIAI, or CAP presenting with bacteremia from 7 double-blind and 1 open-label trial of tigecycline compared with vancomycin-aztreonam, imipenem-cilastatin, levofloxacin, vancomycin, or linezolid were analyzed. The primary efficacy end point was the clinical cure rate at the test-of-cure assessment.


RESULTS
A total of 170 subjects were identified (91 tigecycline recipients and 79 recipients of the comparator agent). Clinical cure rates were 81.3% and 78.5% for tigecycline and the comparator, respectively (P = .702). Analysis by sex, age, creatinine clearance, infection site, Acute Physiology and Chronic Health Evaluation score, and Fine score demonstrated no significant between-group differences. Clinical cure rates for the most commonly represented pathogens (Staphylococcus aureus, Streptococcus pneumoniae, and gram-negative species) were also not significantly different between treatment groups. No decrease in the rate of cure was found in organisms with increasing tigecycline minimum inhibitory concentrations. Nine subjects treated with tigecycline and 1 subject treated with comparator were found to have persistent bacteremia. No clinically significant differences in safety parameters were identified.


CONCLUSIONS
Tigecycline was generally safe and well tolerated in the treatment of secondary bacteremia associated with cSSSI, cIAI, and CAP; cure rates were similar to comparative standard therapies.
Gardiner
David
D
Pfizer, Collegeville, Pennsylvania, USA. DFGardiner@gmail.com
Dukart
Gary
G
Cooper
Angel
A
Babinchak
Timothy
T
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000900:Anti-Bacterial Agents / Q000008:administration & dosage*; D016470:Bacteremia / Q000188:drug therapy* / Q000209:etiology; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D007275:Injections, Intravenous; D008297:Male; D008875:Middle Aged; D008911:Minocycline / Q000008:administration & dosage / Q000031:analogs & derivatives*; D011446:Prospective Studies; D000078304:Tigecycline; D055815:Young Adult
D000900:Anti-Bacterial Agents; D000078304:Tigecycline; D008911:Minocycline