Differential Diagnosis for Gastroenteritis
Single most likely diagnosis
- Staphylococcal food poisoning: This condition typically starts 2-6 hours after ingestion, but it can be as long as 12 hours. It is characterized by diarrhea, vomiting, and abdominal cramps, but in some cases, diarrhea may be the only symptom.
Other Likely diagnoses
- Bacillus cereus food poisoning: This type of food poisoning can cause two syndromes: an emetic syndrome, which starts 1-6 hours after eating, and a diarrheal syndrome, which starts 8-16 hours after eating. The diarrheal syndrome is more likely to cause diarrhea only.
- Clostridium perfringens food poisoning: Symptoms of this condition typically start 8-12 hours after ingestion and include diarrhea and abdominal cramps, but vomiting is less common.
Do Not Miss (ddxs that may not be likely, but would be deadly if missed.)
- Botulism: Although botulism typically presents with neurological symptoms such as blurred vision, difficulty swallowing, and shortness of breath, gastrointestinal symptoms like diarrhea can occur. It is essential to consider botulism in the differential diagnosis due to its high mortality rate if left untreated.
- Vibrio cholerae infection: Cholera can cause severe, watery diarrhea that starts 12-72 hours after ingestion. While it is less common in developed countries, it is crucial to consider cholera in the differential diagnosis, especially in travelers or individuals with exposure to contaminated water or food.
Rare diagnoses
- Aeromonas hydrophila infection: This bacterium can cause gastroenteritis, but it is relatively rare. Symptoms typically start 12-72 hours after ingestion and include diarrhea, abdominal cramps, and vomiting.
- Plesiomonas shigelloides infection: This bacterium can cause gastroenteritis, but it is relatively rare. Symptoms typically start 12-72 hours after ingestion and include diarrhea, abdominal cramps, and vomiting.