How to differentiate Escherichia coli from Enterobacter aerogenes
Oct 08, 2022
Source: Cainiu Health
Dr. Zhao Haiming
Introduction
Differentiate Escherichia coli and Aerobacter through metabolic pathways, symptom presentation, and parasitic modes. Escherichia coli ferments glucose to produce mixed organic acids; Aerobacter ferments glucose to produce organic acids, ethanol, 3-hydroxybutanol, etc. Escherichia coli does not cause gas bloating; Aerobacter causes gas bloating. Escherichia coli parasitizes within the intestinal tract; Aerobacter exists in the internal human intestine.
The differentiation between Escherichia coli and Enterobacter aerogenes can be made based on metabolic pathways, symptom presentation, parasitic modes, and other aspects.
1. Metabolic Pathways
Escherichia coli primarily ferments glucose to produce a mixture of organic acids such as lactic acid, acetic acid, and formic acid. In contrast, Enterobacter aerogenes, after fermenting glucose, produces small amounts of organic acids, ethanol, and 3-hydroxybutanol.
2. Symptom Presentation
Escherichia coli is a type of bacterium belonging to the normal gut microbiota and typically does not cause gas formation. Enterobacter aerogenes also belongs to the intestinal microorganisms but is associated with significant gas production, which may lead to abdominal discomfort and bloating.
3. Parasitic Modes
Escherichia coli mainly resides in the intestines and tends to proliferate following ingestion of contaminated food, exposure to cold, or during colds. When it multiplies excessively, it may trigger enteritis. Enterobacter aerogenes is normally present in the human intestinal tract as part of the body's natural flora. However, under special conditions such as physical weakness or when there is a skin wound, Enterobacter aerogenes may enter the body through the wound and potentially cause infection.
