Question

1. gary says that food poisoning is an infectious disease because its caused by bacteria in food. which response to garys claim is best?

no. food poisoning is caused by parasites, not by bacteria, in food
thats right! when you eat bacteria in food, they infect you and make you sick
the bacteria that cause food poisoning dont infect you; their toxins make you sick
yes. thats why if many people eat the same spoiled food, they all get sick

Explanation:

Food poisoning is typically caused by toxins produced by bacteria (such as Clostridium botulinum producing botulinum toxin) rather than the bacteria themselves directly infecting the body in the same way as in some infectious diseases (where the pathogen replicates within the host tissues). For example, in the case of Staphylococcus aureus, it produces enterotoxins in food. When ingested, these toxins cause symptoms like nausea, vomiting, etc. It's not the live bacteria colonizing and infecting the body cells in a traditional infectious - disease - like process (where the pathogen's replication in host cells is a key feature).

• Option 1: Incorrect. Food poisoning can be caused by bacteria (not just parasites). For example, Salmonella (a bacterium) can cause food - borne illness.
• Option 2: Incorrect. It's not the bacteria infecting in the typical sense (like a cold virus infecting cells) but their toxins.
• Option 4: Incorrect. While multiple people getting sick from the same spoiled food is a common scenario, it doesn't address the mechanism (it's about toxins, not direct bacterial infection).

Answer:

The bacteria that cause food poisoning don't infect you; their toxins make you sick.