# Gastroenteritis outbreak in Crete

> Live situation record from CLSTR: https://clstr.news/situations/gastroenteritis-outbreak-in-crete
> Updated: 2026-10-07T13:29:01.000Z. Sources: 10. Developments: 2.

Health authorities in Crete are investigating a surge in gastroenteritis cases, with the total number of reported infections rising to 93. A significant concentration of cases has been identified in Rethymno, where approximately 30 individuals have sought hospital treatment since late September. Officials note that the actual infection count may be higher, as many patients experiencing milder symptoms have remained at home.

Investigators are evaluating several potential causes, including viral infections and the impact of recent heavy flooding on the island’s water supply. While widespread water sampling was ordered across all four prefectures, preliminary laboratory results for stool and viral tests have returned negative. Furthermore, some local agency tests indicate that water quality remains safe, suggesting that flooding may not have compromised the networks within the Rethymno municipality.

The National Public Health Organization (EODY) is conducting an epidemiological investigation using specialized questionnaires to map patient movements and common exposure factors. Most patients report symptoms of vomiting and diarrhea, typically resolving within 24 to 48 hours. No intensive care hospitalizations or serious health risks have been reported among adults.

## Claims

- Authorities are investigating the water supply network as a possible source of infection. (corroborated by 3 sources)
- Approximately 30 people have been hospitalized at the Rethymno hospital with gastroenteritis symptoms since last Friday. (corroborated by 3 sources)
- Water testing is being expanded preventatively to all four prefectures of Crete. (corroborated by 3 sources)
- EODY teams are conducting epidemiological tracing and using a special questionnaire to collect data on patients. (corroborated by 3 sources)
- Authorities are investigating a potential link between the gastroenteritis outbreak and recent flooding in Crete. (corroborated by 3 sources)
- The water supply network is being investigated as a possible source of contamination. (corroborated by 3 sources)
- Approximately 30 people have been hospitalized in Rethymno with severe gastroenteritis symptoms since last Friday. (corroborated by 3 sources)
- EODY teams are conducting epidemiological tracing using a special questionnaire to identify common factors among patients. (corroborated by 3 sources)
- The exact cause of the outbreak, whether viral or related to recent flooding, has not yet been determined. (corroborated by 3 sources)

## Timeline

### 2026-10-07: Crete health authorities investigate gastroenteritis outbreak

Health authorities in Crete are investigating a gastroenteritis outbreak involving 93 cases, with a significant cluster in Rethymno. Officials are testing water supplies following recent flooding.

8 sources. https://clstr.news/cluster/crete-health-authorities-investigate-gastroenteritis-outbreak-in-rethymno

### 2026-09-27: Rhodes experiences gastroenteritis outbreak during tourism season

A viral gastroenteritis outbreak on the Greek island of Rhodes has caused hundreds of cases, accounting for one-third of emergency room visits during the peak tourism season.

2 sources. https://clstr.news/cluster/rhodes-experiences-gastroenteritis-outbreak-during-tourism-season

---
Cite as: Gastroenteritis outbreak in Crete. CLSTR, https://clstr.news/situations/gastroenteritis-outbreak-in-crete