Most animals are intimately associated with microbes. Microbes live in their guts, in their mouths, and on their skin.
Microbes are important for the good health of most animals.
Because many animals have more microbe cells than they have animal cells living in or on them, it is as if animals evolved as homes for microbes. Hosts with the Most Animals provide microbes with food and shelter. You could say that animals throw a continuous party for microbes. Often when people think about microbes and animals, they think of disease. However, most microbes do animals more good than harm.