title: Comparative study of ceftriaxone and trimethoprim-sulfamethoxazole for the treatment of chancroid in Thailand.
abstract: A single dose of ceftriaxone (250 mg) administered intramuscularly was compared with trimethoprim-sulfamethoxazole (TMP-SMZ; 160/800 mg) administered orally twice daily for seven days or with a single dose of TMP-SMZ (640/3,200 mg) administered orally for the treatment of chancroid in men in Thailand. Haemophilus ducreyi was isolated from 79 (48%) of 164 men with a clinical diagnosis of chancroid. For men with ulcers that were culture positive for H. ducreyi, rates of cure were 100% in 25 men treated with ceftriaxone, 87% in 23 men given TMP-SMZ for seven days, and 55% in 31 men given TMP-SMZ in a single dose. For men with ulcers that were culture negative for H. ducreyi, rates of cure were 100% in 29 men treated with ceftriaxone, 66% in 32 men given TMP-SMZ for seven days, and 63% in 24 men given TMP-SMZ in a single dose. The MIC50 of the three antibiotics for 94 isolates of H. ducreyi were as follows: 0.004 micrograms/ml for ceftriaxone, 16 micrograms/ml for trimethoprim, and greater than 512 micrograms/ml for sulfamethoxazole. Our study indicates that ceftriaxone in a single dose of 250 mg is effective, but that TMP-SMZ, even when given in a standard seven-day regimen, is not effective treatment for chancroid in Thailand.
mesh_terms: D000284:Administration, Oral; D000328:Adult; D002443:Ceftriaxone / Q000008:administration & dosage / Q000494:pharmacology / Q000627:therapeutic use*; D002602:Chancroid / Q000188:drug therapy* / Q000382:microbiology; D004338:Drug Combinations / Q000008:administration & dosage / Q000627:therapeutic use; D004352:Drug Resistance, Microbial; D006191:Haemophilus ducreyi / Q000187:drug effects / Q000302:isolation & purification; D006801:Humans; D007273:Injections, Intramuscular; D008297:Male; D013420:Sulfamethoxazole / Q000008:administration & dosage / Q000627:therapeutic use*; D013785:Thailand; D014295:Trimethoprim / Q000008:administration & dosage / Q000494:pharmacology / Q000627:therapeutic use*; D015662:Trimethoprim, Sulfamethoxazole Drug Combination
chemical_list: D004338:Drug Combinations; D002443:Ceftriaxone; D015662:Trimethoprim, Sulfamethoxazole Drug Combination; D014295:Trimethoprim; D013420:Sulfamethoxazole