bacterial dysentery

Bacterial dysentery is an acute intestinal infection primarily caused by Shigella bacteria, leading to severe inflammation of the colon. It causes frequent, often bloody diarrhea with mucus, abdominal cramps, and fever. This highly contagious disease is most common in areas with poor sanitation, particularly affecting young children and immunocompromised individuals.

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What is bacterial dysentery?

Dysentery has been a recognized scourge throughout human history, frequently causing epidemics in military settings and areas of natural disaster. The primary causative agent, *Shigella dysenteriae*, was first identified by the Japanese microbiologist Kiyoshi Shiga in 1897. Its historical impact underscores the critical link between sanitation and public health.

Symptoms

  • Frequent, painful passage of stools, often containing blood, mucus, or pus.
  • Severe abdominal cramps and pain.
  • High fever.
  • Tenesmus (a constant feeling of needing to pass stool, despite an empty bowel).
  • Nausea and vomiting.
  • Dehydration.

Transmission

Bacterial dysentery primarily spreads through the fecal-oral route. This occurs via direct person-to-person contact, or indirectly by consuming food or water contaminated with infected feces. Poor personal hygiene, inadequate sanitation, and crowded living conditions significantly facilitate its rapid transmission.

Contagious Period: Varies by disease

Prevention

  • Practice rigorous hand hygiene with soap and water, especially after using the toilet and before handling food.
  • Ensure access to safe, clean drinking water and use proper sanitation facilities.
  • Avoid consuming raw or undercooked foods and unpasteurized dairy products.
  • Carefully wash fruits and vegetables before eating.
  • There is currently no widely available vaccine for bacterial dysentery caused by *Shigella*.

Active Outbreaks & Recent Cases

Real-time intelligence from global health monitoring and AI-powered surveillance

Data sources: BEACON, ProMED, WHO, CDC, and 50+ national health agencies

No Active Outbreaks Detected

Our AI-powered surveillance hasn't detected significant bacterial dysentery activity in the past 30 days.

Real-time monitoring continues 24/7 across BEACON, ProMED, WHO, CDC, and 50+ global health agencies

What This Means

Currently, bacterial dysentery case counts are within baseline expectations globally. However, diseases can emerge rapidly, which is why continuous monitoring is critical.

Stay Prepared

Download the Virus Watcher app to get instant alerts if bacterial dysentery activity increases in your region or travel destinations.

Prevention Remains Important

Even without active outbreaks, understanding bacterial dysentery prevention helps protect you and your community:

  • Practice rigorous hand hygiene with soap and water, especially after using the toilet and before handling food.
  • Ensure access to safe, clean drinking water and use proper sanitation facilities.
  • Avoid consuming raw or undercooked foods and unpasteurized dairy products.
  • Carefully wash fruits and vegetables before eating.
  • There is currently no widely available vaccine for bacterial dysentery caused by *Shigella*.
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Expert Resources & References

Trusted information from leading health organizations

CDC

Official guidance from the U.S. Centers for Disease Control and Prevention

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WHO

Global disease surveillance and guidelines from the World Health Organization

View WHO Resources →

Research

Latest peer-reviewed research and clinical studies

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Medically Reviewed Content

Disease information on Virus Watcher is reviewed by our Chief Epidemiologist, a former CDC lead analyst for FluSight forecasting. Outbreak data is aggregated from verified sources including BEACON, ProMED, WHO, CDC, and 50+ national health agencies. This information is for educational purposes and should not replace professional medical advice.

Last reviewed: 2026-06-03

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