Question:
Which of the following organism is responsible for food infection
Which of the following organism is responsible for food infection
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Food infections typically have longer incubation periods (12 to 72 hours) than intoxications because the ingested pathogens require time to colonize and invade the host's tissues.
Updated On: Aug 5, 2026
- Staphylococcus aureus
- Salmonella typhi
- Bacillus cereus
- Escherichia coli
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Verified By Collegedunia
The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept:
A food infection is a foodborne disease that requires the consumption of viable pathogenic cells.
These cells must survive the gastric acid barrier, colonize the intestinal tract, and invade host tissues to cause clinical symptoms.
Step 2: Detailed Explanation:
Salmonella typhi is a classic foodborne infectious pathogen.
When contaminated food or water is ingested, viable bacteria travel to the small intestine.
They invade the mucosal epithelium and multiply within the lymphoid tissues of the Peyer's patches.
Because the disease process requires cell survival, active host colonization, and subsequent tissue invasion, it is classified as a food infection.
In contrast:
Staphylococcus aureus causes food intoxication due to the ingestion of pre-formed enterotoxins.
Bacillus cereus causes two distinct syndromes: an emetic syndrome (intoxication) caused by a pre-formed toxin, and a diarrheal syndrome (toxi-infection) caused by enterotoxins produced in the gut.
While pathogenic strains of Escherichia coli also cause infections, Salmonella typhi is the primary representative of food infections among the options.
Step 3: Final Answer:
Therefore, Salmonella typhi is responsible for causing food infection.
A food infection is a foodborne disease that requires the consumption of viable pathogenic cells.
These cells must survive the gastric acid barrier, colonize the intestinal tract, and invade host tissues to cause clinical symptoms.
Step 2: Detailed Explanation:
Salmonella typhi is a classic foodborne infectious pathogen.
When contaminated food or water is ingested, viable bacteria travel to the small intestine.
They invade the mucosal epithelium and multiply within the lymphoid tissues of the Peyer's patches.
Because the disease process requires cell survival, active host colonization, and subsequent tissue invasion, it is classified as a food infection.
In contrast:
Staphylococcus aureus causes food intoxication due to the ingestion of pre-formed enterotoxins.
Bacillus cereus causes two distinct syndromes: an emetic syndrome (intoxication) caused by a pre-formed toxin, and a diarrheal syndrome (toxi-infection) caused by enterotoxins produced in the gut.
While pathogenic strains of Escherichia coli also cause infections, Salmonella typhi is the primary representative of food infections among the options.
Step 3: Final Answer:
Therefore, Salmonella typhi is responsible for causing food infection.
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