As a barely related tangential thought: I've wanted to write a short science-fiction story about an alien life-form slowly colonizing our planet by invading hum

As a barely related tangential thought: I've wanted to write a short science-fiction story about an alien life-form slowly colonizing our planet by invading human gut micro-biome through our diet. Through this process they alter our food preferences to choose diets most conducive to their own flourishing and then eventually effect our minds. We become convinced that diet choices are for the benefit of our own health but in reality we are eating foods that really benefit the alien bacteria in our guts. The idea is very roughly based on the cat poop parasite (Toxoplasma gondii) that is theorized to alter human brain chemistry to change risk-taking behavior.