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Questions and Answers
Which organism is most likely associated with undercooked chicken?
Which organism is most likely associated with undercooked chicken?
- Proteus mirabilis
- Staphylococcus aureus
- Clostridium perfringens
- Campylobacter jejuni (correct)
Which microorganism is least likely to be carried by humans?
Which microorganism is least likely to be carried by humans?
- Helicobacter pylori
- Staphylococcus aureus
- Enterohemorrhagic E. coli (correct)
- Staphylococcus epidermidis
What is most characteristic of blood and mucus in stool?
What is most characteristic of blood and mucus in stool?
- Bacillary dysentery (correct)
- Staphylococcal food poisoning
- A food poisoning due to preformed microbial toxins
- Bacterial meningitis
Which organism can produce preformed exotoxins leading to food poisoning?
Which organism can produce preformed exotoxins leading to food poisoning?
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Which of the following is NOT a characteristic of Salmonella?
Which of the following is NOT a characteristic of Salmonella?
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Which medium is NOT used to cultivate N. gonorrhea?
Which medium is NOT used to cultivate N. gonorrhea?
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Study Notes
Food Poisoning Causes
- Ingestion of food containing preformed exotoxins can cause food poisoning, which can be produced by bacteria such as Staphylococcus aureus, Salmonella enteritidis, Listeria monocytogenes, and Clostridium difficile.
Food Poisoning Pathogens
- Consumption of undercooked chicken can result in infection with Campylobacter jejuni.
- Blood and mucus in the stool is a characteristic of Bacillary dysentery.
Bacterial Characteristics
- Salmonella is characterized by being lactose negative, grouped by O, H, and Vi antigens, and does not always produce H2S.
- Enterohemorrhagic E. coli is more likely to be carried by humans than Helicobacter pylori, Staphylococcus aureus, and Staphylococcus epidermidis.
Culture Media
- Thayer-Martin agar is a culture medium used to cultivate Neisseria gonorrhoeae, but MNYC medium is not.
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