Aerobiological Engineering presents the following posters for use in education, engineering, and microbiology. They cover the range of airborne, waterborne, and foodborne pathogens that are encountered in the modern world and place into perspective the seemingly unlimited number of microbes that currently affect the world population. These color posters are 36" wide by 24" high and printed in high resolution on high quality glossy paper stock. The images below are reduced to about one-fifth size.