Online Textbook Bacteriology is continuously updated and includes information on Staphylococcus, MRSA, Streptococcus, E. coli, anthrax, cholera, tuberculosis, Lyme disease and other bacterial diseases of humans.
Kenneth Todar is the author of the Online Textbook of Bacteriology and an emeritus lecturer at the University of encourages people to wear a FDA approved face mask during the Covid-19 pandemic.
The Online Textbook of Bacteriology is a general and medical microbiology text and includes discussion of staph, MRSA, strep, Anthrax, E. coli, cholera, tuberculosis, Lyme Disease and other bacterial pathogens.
Kenneth Todar, PhDKenneth Todar's Online Textbook of Bacteriology Home PageOnline Textbook of Bacteriology Table of ContentsInformation about materials for teaching bacteriology.Contact Kenneth Todar.

Superbugs: MRSA
Staphylococcus aureus

Web Review of Todar's Online Textbook of Bacteriology. "The Good, the Bad, and the Deadly"

Textbook of Bacteriology
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microbes in the environment

cycles of elements

bacterial structure

bacterial nutrition

bacterial growth

bacterial metabolism

bacteria and archaea

normal flora

bacterial pathogens

bacterial toxins



antibiotic resistance

staphylococci and MRSA




E. coli






meningococcal meningitis

botulism and tetanus

hib meningitis


whooping cough

B. cereus food poisoning



Rocky Mountain spotted fever

Lyme disease

Vibrio vulnificus


lactic acid bacteria

Kenneth Todar currently teaches Microbiology 100 at the University of Wisconsin-Madison.  His main teaching interests include general microbiology, bacterial diversity, microbial ecology and pathogenic bacteriology.

Welcome to Todar's Online Textbook of Bacteriology This textbook has evolved from online and live-in-person lectures presented in my bacteriology courses at the University of Wisconsin-Madison. Its contents are suitable for reading or presentation in courses or course modules concerning general microbiology and medical bacteriology at the college and advanced high school levels of education. As an electronic text, new material can be added, and current material can revised and updated. This is an inherent advantage of the web-based text over the tree-burner.

There has never been an attempt to present a complete textbook or compendium of knowledge in bacteriology as the rate of production of new information in microbiology far outruns the author's ability to acquire and properly present it. That said, beginning in 2015, only minimal revisions or corrections have been made to the text, and the current presentation should not be considered up-to-date beyond that time. However, the basic tenets of microbiology presented herein are reliably accurate, even if nomenclature or vocabulary is outdated.

Kenneth Todar, PhD
University of Wisconsin
Department of Bacteriology

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Kenneth Todar has taught microbiology to undergraduate students at The University of Texas, University of Alaska and University of Wisconsin since 1969.

© 2020 Kenneth Todar, PhD - Madison, Wisconsin