Because (per the article) the metabolism doing the worm is not the roundworm's but the microbe. Which means that the human gut only has to be provide a viable e

Because (per the article) the metabolism doing the worm is not the roundworm's but the microbe. Which means that the human gut only has to be provide a viable environment for the microbe to do what it wants to do. This is different, say, than translating the safety or efficacy of a vaccine on a maurine model since the data on the safety and efficacy of the vaccine is specifically for a rodent's immune system.