
a.
To determine:
The steps required to identify the specific cause of EHEC outbreak.
Introduction:
E.coli is a gram negative bacterium generally present in the lower intestine of warm-blooded organism. They are rod-shaped and anaerobic bacteria. These bacteria can cause infection and the symptoms associated with these infections are vomiting, stomach cramps and fever.
a.

Explanation of Solution
To identify the specific reason for this outbreak, the steps that should be taken:
1) The first step should be to identify causative agent of the infection which could be bacteria or viruses.
2). The second step is to identify the origin of the infection: E.coli generally spread through contaminated food and water. Mostly infections spread through contaminated food as in the case of EHEC, as this bacterium was present in the contaminated bean sprouts.
3) The third step is to identify the toxic chemical or agent that causing ill symptoms in the host.
Steps required in identifying the specific cause of EHEC outbreak is to located the causative agent of the infection, origin of the causative agents and the toxic chemical.
b.
To determine:
The difference between the EHEC and other food-borne infection caused by E.coli
Introduction:
E.coli is a gram negative bacterium generally present in the lower intestine of warm-blooded organism. They are rod-shaped and anaerobic bacteria. These bacteria can cause infection and the symptoms associated with these infections are vomiting, stomach cramps and fever.
b.

Explanation of Solution
EHEC (enterohemorrhagic E.coli) contains toxins, which causes hemolytic uremic syndrome, bloody diarrhea and acute kidney failures. The other food-borne infection caused by E.coli causes mild cases of diarrhea, mild dysentery which could be resolved with minimal treatment. Hence, the basic difference between the EHEC and other food-borne infection caused by E.coli is that EHEC is a harmful strain of E.coli than other E.coli strain.
EHEC is a pathogenic strain of E.coli.
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Chapter 3 Solutions
Microbiology: A Systems Approach
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