Related Experiment Video
Updated: Jul 11, 2026

Determination of Tolerable Fatty Acids and Cholera Toxin Concentrations Using Human Intestinal Epithelial Cells and BALB/c Mouse Macrophages
Published on: May 30, 2013
Single-dose azithromycin for the treatment of cholera in adults
Debasish Saha1, Mohammad M Karim, Wasif A Khan
1International Centre for Diarrhoeal Disease Research, Dhaka, Bangladesh. dsaha@icddrb.org
Insights
Single-dose azithromycin effectively treated severe cholera in adults, surpassing ciprofloxacin. This finding is crucial for managing cholera outbreaks caused by current Vibrio cholerae strains.
Area of Science:
- Infectious Diseases
- Microbiology
- Clinical Pharmacology
Background:
- Single-dose azithromycin is a known treatment for severe cholera in children.
- Its efficacy in adults with severe cholera remained unevaluated prior to this study.
Purpose of the Study:
- To compare the effectiveness of single-dose azithromycin versus ciprofloxacin in treating severe cholera in adults.
- To assess clinical and microbiological outcomes in adult cholera patients.
Main Methods:
- A double-blind, randomized trial involving 195 adult men with severe cholera.
- Patients received either a single 1-g dose of azithromycin or ciprofloxacin.
- Clinical and bacteriologic success were primary outcome measures, assessed over a five-day hospitalization period.
Main Results:
- Azithromycin achieved significantly higher clinical success (73%) compared to ciprofloxacin (27%) (P<0.001).
- Bacteriologic success was also significantly higher with azithromycin (78%) versus ciprofloxacin (10%) (P<0.001).
- Azithromycin treatment resulted in shorter diarrhea duration, less vomiting, fewer stools, and lower stool volume.
Conclusions:
- Single-dose azithromycin is effective for treating severe cholera in adults.
- The diminished efficacy of ciprofloxacin may be due to reduced activity against current Vibrio cholerae O1 strains in Bangladesh.
Background:
Single-dose azithromycin is effective in the treatment of severe cholera in children, but its effectiveness in adults has not been evaluated.
Methods:
We conducted a double-blind, randomized trial comparing the equivalence of azithromycin and ciprofloxacin (each given in a single 1-g dose of two 500-mg tablets) among 195 men with severe cholera caused by Vibrio cholerae O1 or O139. Patients were hospitalized for five days. A stool culture was performed daily. Primary outcome measures were clinical success (the cessation of watery stools within 48 hours after drug administration) and bacteriologic success (the inability to isolate V. cholerae after 48 hours).
Results:
Therapy was clinically successful in 71 of 97 patients receiving azithromycin (73 percent) and in 26 of 98 patients receiving ciprofloxacin (27 percent) (P<0.001) and bacteriologically successful in 76 of 97 patients receiving azithromycin (78 percent) and in 10 of 98 patients receiving ciprofloxacin (10 percent) (P<0.001). Patients who were treated with azithromycin had a shorter duration of diarrhea than did patients treated with ciprofloxacin (median, 30 vs. 78 hours); a lower frequency of vomiting (43 percent vs. 67 percent); fewer stools (median, 36 vs. 52); and a lower stool volume (median, 114 vs. 322 ml per kilogram of body weight). The median minimal inhibitory concentration of ciprofloxacin for the 177 isolates of V. cholerae O1 was 0.25 mug per milliliter, which was 11 to 83 times as high as that in previous studies at this site.
Conclusions:
Single-dose azithromycin was effective in the treatment of severe cholera in adults. The lack of efficacy of ciprofloxacin may result from its diminished activity against V. cholerae O1 strains currently circulating in Bangladesh. (ClinicalTrials.gov number, NCT00229944.).
Related Concept Videos
Treating Helicobacter pylori in Peptic Ulcers: Antimicrobial Therapy
Drugs Affecting GI Tract Motility: Antimicrobials as Antidiarrheal Agents
Drugs for Treatment of Diarrhea-Predominant IBS
Two specific drugs used in the treatment are alosetron (Lotronex) and eluxadoline (Viberzi). Alosetron, a 5-HT3 antagonist, works by slowing the movement of stools in the gut, reducing bowel...
Drugs for Treatment of Ulcerative Colitis in IBD
Dosage Regimen: Multiple Oral Dosage
Cholera

