Main Classes of Microorganisms

Helminths

◾multicellular organisms ◾life cycle involves stages in other organisms

Protozoa

◾one cell animal like found in decayed materials ◾feces, insect bites, contaminated water ◾malaria

Bacteria

◾one cell organism that multiply rapidly ◾bacilli, spirilla, cocci ◾strept throat

Rickettsiae

◾parasitic microorganisms that cannot live outside the cells of others

Fungi

◾simple plant like organisms ◾live on dead matter ◾mold, yeast

Viruses

◾smallest microorganism