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Israel MOH Medical laboratory worker Practice Tests & Test Prep by Exam Edge - Free Test


Our free Israel Ministry of Health Medical laboratory worker Practice Test was created by experienced educators who designed them to align with the official Israel Ministry of Health content guidelines. They were built to accurately mirror the real exam's structure, coverage of topics, difficulty, and types of questions.

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Israel Ministry of Health Medical laboratory worker - Free Test Sample Questions

Which of the following serotypes of E. coli causes food poisoning?

Correct Answer:
enterohemorrhagic e. coli


enterohemorrhagic e. coli (often abbreviated as ehec) is the serotype of escherichia coli that is most commonly associated with food poisoning outbreaks. this pathogen is notorious for causing severe illness including diarrhea, often bloody, and can occasionally lead to a life-threatening complication known as hemolytic uremic syndrome (hus), particularly in children and the elderly. ehec produces toxins known as shiga toxins, which are primarily responsible for the damage to the lining of the intestine and the severe symptoms that can follow.

enterotoxigenic e. coli (etec), on the other hand, is more commonly linked to traveler's diarrhea and is characterized by the production of enterotoxins that stimulate the lining of the intestines, causing it to secrete excessive fluid, thus leading to watery diarrhea. etec infections are typically associated with the consumption of contaminated water and are less often linked to food poisoning compared to ehec.

enteroinvasive e. coli (eiec) causes illness by invading and destroying intestinal cells, leading to a condition that can resemble shigellosis with symptoms that include bloody diarrhea and significant abdominal pain. this form of e. coli infection is less common than those caused by ehec and etec.

enteropathogenic e. coli (epec) causes illness primarily in infants and is a significant cause of persistent diarrhea in developing countries. epec does not produce toxins like ehec but adheres tightly to the intestinal walls, leading to inflammation and a watery type of diarrhea.

in summary, while multiple serotypes of e. coli can cause various types of gastrointestinal distress, enterohemorrhagic e. coli (ehec) is the primary serotype associated with food poisoning outbreaks in the context of consuming contaminated food products. its ability to cause severe damage to the intestinal walls and potential systemic complications makes it particularly dangerous among the e. coli serotypes.