EHEC – Symptoms, Causes, Prevention
EHEC are dangerous gut bacteria causing diarrhea and kidney damage.
Things worth knowing about "EHEC"
EHEC are dangerous gut bacteria causing diarrhea and kidney damage.
EHEC (enterohemorrhagic Escherichia coli) are highly pathogenic strains of gut bacteria that belong to the Shiga-toxin producing E. coli (STEC) group. Their toxins damage the intestinal lining, leading to bloody diarrhea, severe abdominal cramps, and in some cases fever. High-risk groups include children, the elderly, and immunocompromised individuals.
Transmission mainly occurs through contaminated food such as undercooked beef, raw milk, or unwashed vegetables. Person-to-person spread is also possible, especially in households and childcare facilities. The most severe complication is hemolytic uremic syndrome (HUS), a leading cause of acute kidney failure in children.
Diagnosis is based on stool testing, detecting both the bacteria and their toxin production. Antibiotics are usually avoided, as they may increase toxin release and worsen the disease course. Treatment is supportive, focusing on fluid and electrolyte management and intensive care in severe cases.
A promising area of research focuses on lactoferrin, a natural iron-binding protein found in milk and part of the innate immune system. Lactoferrin exhibits antibacterial effects by depriving bacteria of iron and antiviral activity by preventing viral binding to host cells. Research indicates it may reduce E. coli adherence to intestinal cells and thus mitigate infection severity (Ward et al., 2005). While not a replacement for medical therapy, lactoferrin is considered a potential supportive tool in combating EHEC and other pathogens.
Key Facts about EHEC
- Shiga-toxin producing E. coli (STEC)
- Symptoms: bloody diarrhea, abdominal cramps, sometimes fever
- Complication: hemolytic uremic syndrome (HUS) leading to kidney failure
- Transmission via contaminated food and person-to-person contact
- Therapy: mainly supportive care, no standard antibiotics
- Lactoferrin investigated as a supportive antimicrobial factor
Literaturangaben:
- Tarr, P. I., Gordon, C. A., & Chandler, W. L. (2005). Shiga-toxin-producing Escherichia coli and haemolytic uraemic syndrome. The Lancet, 365(9464), 1073–1086. https://doi.org/10.1016/S0140-6736(05)71144-2
- Karmali, M. A. (2017). Infection by Shiga toxin-producing Escherichia coli: an overview. Molecular Biotechnology, 61(10), 801–811. https://doi.org/10.1007/s12033-017-0024-7
- Superti, F., & De Angelis, M. (2017). Lactoferrin and its antimicrobial and antiviral activities: An update. Molecules, 22(9), 1591. https://doi.org/10.3390/molecules22091591
- Ward, P. P., Paz, E., & Conneely, O. M. (2005). Multifunctional roles of lactoferrin: a critical overview. Cellular and Molecular Life Sciences, 62(22), 2540–2548. https://doi.org/10.1007/s00018-005-5369-8
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As one of the most valuable proteins in the body, lactoferrin is a natural component of the immune system.