Question

question 8 (2.5 points)
individuals, such as veterinarians, who work closely with farm animals treated with antibiotics tend to carry ___ as a result.
lethal bacteria
bacteria vulnerable to all antibiotics
bacteria vulnerable to some antibiotics
bacteria resistant to flavomycin® but not vancomycin
more antibiotic-resistant bacteria

Explanation:

When farm animals are treated with antibiotics, it creates a selective pressure. Bacteria that are not resistant to the antibiotics are killed, while those that have some level of resistance (either naturally occurring or due to genetic transfer) survive. Individuals like veterinarians who work closely with these animals are then exposed to and can carry these surviving bacteria. Antibiotic - resistant bacteria are more likely to survive in an environment where antibiotics are used (in the farm animals). Lethal bacteria (which could potentially kill the host) are not likely to be carried in a stable way as they would harm the carrier. Bacteria vulnerable to all or some antibiotics would be more likely to be killed by the antibiotics used in the farm animals. The option about resistance to a specific antibiotic (Flavomycin) but not another (vancomycin) is too specific and not the general case. The key concept is antibiotic - resistance development due to antibiotic use, leading to the carriage of more antibiotic - resistant bacteria.

Answer:

more antibiotic - resistant bacteria