Although I am an omnivore, I must have dairy butter on my morning sandwich, otherwise I lose my appetite. Similarly, the Norwegian dulce de leche type spread “Hapå” is according the Nestlé advertisment an effective means to get the kids to eat their sandwiches.
The macrophages behave a bit in the same way. They eat everything, but it helps a lot if a bacterium is covered with “Hapå”. It then goes down a lot faster.