Researcher: Salmonella bacteria are a major cause of illness in humans who consume poultry. Young chicks that underwe...

shunhe on June 2, 2020

Hi @kassidee,

Thanks for the question! Let’s take a look at this stimulus. We’re told that salmonella are a major cause of illness in humans who consume poultry. Young chicks that underwent a new treatment had less Salmonella infections than untreated ones, but a week after, they had higher concentrations of a variety of bacteria than untreated ones.

Now we’re asked to help explain the concentrations of bacteria a week after the treatment, which makes this a resolve the paradox question. Let’s take a look at (E), which tells us that the bacteria were nonvirulent types whose growth is inhibited by Salmonella bacteria. That actually helps explain this—there was less salmonella in the first week in the treated chicks, and so these bacteria had the opportunity to grow, and so in the second week, the treated chicks had higher concentrations of these bacteria than the untreated chicks.

Hope this helps! Feel free to ask any other questions that you might have.