Welcome to the online home of The Microbial Challenge, Second Edition, by
Dr. Robert I. Krasner. Developed exclusively for the second edition, this site offers a variety of resources
designed to enhance your study of microbiology and give you an opportunity to explore topics from the text in
more detail.
Access to this website must be purchased separately. Click here to purchase access for $14.95 or click
here to redeem an AccessCode. If you have already registered, please use the form below to
log in.