Whereas Earth has only one satellite (aka. the Moon), Mars has two small moons: Phobos and Deimos. And whereas the vast majority of moons in our Solar System are large enough to become round spheres similar to our own Moon, Phobos and Deimos are asteroid-sized and misshapen in appearance.
Microorganisms, like certain bacteria and yeasts, living on the human skin or in the nose, mouth, throat, small and large intestine and vagina, are part of the normal human flora; they prevent overgrowth of harmful microorganisms. Some of these microbes, when overgrow, may become pathogenic, though.
Harmful Bacteria. Some of the harmful types of bacteria are those which can cause disease or adversely affect one's health, and these include: Mycobacteria, which are rod-shaped, and neither Gram-positive nor Gram-negative microorganisms that can cause infections of the lungs, skin and other parts of the body.