Which organism can cause a toxicoinfection by producing toxins and an intestinal infection?

Which organism can cause a toxicoinfection by producing toxins and an intestinal infection?

• A. Clostridium perfringens
• B. Bacillus subtilis
• C. Staphylococcus aureus
• D. Listeria monocytogenes

Answer: (A)

Toxicoinfection refers to a situation where the organism you ingest colonizes the gut and then produces toxins there, so the illness comes from toxins made inside your body rather than toxins already present in food. Clostridium perfringens is a classic example: after consuming foods with large numbers of this bacterium, it grows in the small intestine and releases an enterotoxin in situ, leading to intestinal symptoms such as watery diarrhea and abdominal cramps. The disease is tied to toxin production within the host, which is what defines a toxicoinfection. The other organisms don’t fit this pattern as well. Toxins produced in food by Staphylococcus aureus cause food poisoning that presents rapidly with vomiting rather than a toxin made inside the gut after ingestion. Bacillus subtilis is not a common cause of this illness, and Listeria monocytogenes mainly causes invasive infection rather than a toxin-mediated intestinal disease.

Toxicoinfection refers to a situation where the organism you ingest colonizes the gut and then produces toxins there, so the illness comes from toxins made inside your body rather than toxins already present in food. Clostridium perfringens is a classic example: after consuming foods with large numbers of this bacterium, it grows in the small intestine and releases an enterotoxin in situ, leading to intestinal symptoms such as watery diarrhea and abdominal cramps. The disease is tied to toxin production within the host, which is what defines a toxicoinfection.

The other organisms don’t fit this pattern as well. Toxins produced in food by Staphylococcus aureus cause food poisoning that presents rapidly with vomiting rather than a toxin made inside the gut after ingestion. Bacillus subtilis is not a common cause of this illness, and Listeria monocytogenes mainly causes invasive infection rather than a toxin-mediated intestinal disease.