Chondromyces crocatus: The Bacterium that Wanted to be a Fungus - Photographs and information on this species which grows on dung, where individuals mass together and appear to produce fruitbodies similar to a fungus. Proteobacteria - Information from Wikipedia on this phylum of gram-negative bacteria, now divided by rRNA sequencing into five divisions, alpha, beta, gamma, delta and epsilon. Pseudomonas - Information from Wikipedia on this group of bacteria, their history, characteristics, taxonomy, pathogenicity and uses. Campylobacter - Information from Wikipedia on this group of gram-negative bacteria that can cause food poisoning, their classification, genome and pathogenesis. Legionella - Information from Wikipedia on these gram-negative bacteria, their pathogenesis and the control of potential sources of the disease. Vibrio - Information from Wikipedia on these gram-negative bacteria, their pathogenic strains and non-pathogenic strains and their classification. Rhizobium in Soil - Photograph and information on Rhizobium trifolii with an animated GIF showing its size relative to other organisms. Azospirillum brasilense - Photograph and information on this bacterium which lives in soil close to roots and is involved in nitrogen fixation. Nitrifying Bacterium - Photograph and information on Nitrosomonas which is able to convert ammonia into nitrite. Azotobacter - Photograph of an encysted bacterium, and information on the process by which this free-living organism can fix nitrogen. Rhizobia - Information from Wikipedia on these soil bacteria that form nodules on plant roots and fix nitrogen. Rhizobia Taxonomy - Provides an up-to-date taxonomy on this group of bacteria, important in a field where genus and species names have changed rapidly. Yersinia pestis - Kristi Taylor provides information on the organism responsible for the Black Death, its classification, its hosts, the several forms of the disease and its outcome, with or without treatment. Bordetella pertussis - Britten Wolf provides information on this bacillus, the causal agent of Whooping Cough, and on the disease itself. Neisseria Meningitidis - Research project by Samantha Bingen on this bacterium, including its classification, the illness it causes, its habitat, reproduction and nutrition. Pseudomonas syringae - Research project by Rachel Campbell on this plant pathogen which has the remarkable property of ice nucleation and is being researched for possible use in agriculture to prevent frost damage to crops. Rickettsia rickettsii - Research project by Chelsea Gibson on this bacterium, including its classification, habitat, reproduction and the Rocky Mountain spotted fever it can cause. Legionella pneumophila - Research project by Amanda a la Budda on this bacterium, the causative agent of Legionnaire's Disease, including its classification, habitat, reproduction, adaptations, nutrition and the disease it causes. Escherichia coli - Research project by Justine Moder on this ubiquitous bacterium including its classification, habitat, reproduction, adaptations, nutrition, interactions with other species and pathology. Helicobacter pylori - Research project by Evan Pluym on this bacterium, the cause of stomach ulcers, including its classification, habitat, adaptations, nutrition, life history and pathology. Vibrio cholerae - Research project by Hannah Zimmer on the causative agent of cholera, including its classification, habitat, reproduction, adaptations, nutrition and the history of the disease it causes. Xanthomonas axonopodis citri - Description of this bacterial pathogen, the cause of citrus canker, its habitat and distribution, life history, physical tolerances, community ecology and invasion information. Salmonella enteritidis - Research project by Jason Meinhardt at the University of Wisconsin-LaCrosse. Rickettsial Diseases, including Typhus and Rocky Mountain Spotted Fever - Todar's Online Textbook of Bacteriology chapter on Rickettsia bacteria that cause typhus and Rocky Mountain spotted fever. Pathogenic Neisseriae: Gonorrhea, Neonatal Ophthalmia and Meningococcal Meningitis - Chapter from Todar's Online Textbook of Bacteriology. Haemophilus influenzae and Hib Meningitis - Chapter from Todar's Online Textbook of Bacteriology on this parasitic bacterium. Pseudomonas aeruginosa - Chapter from Todar's Online Textbook of Bacteriology on this bacteriaum that can infect any tissue. Vibrio vulnificus - Chapter from Todar's Online Textbook of Bacteriology on this bacterium that can cause deadly food poisoning and wound infections. Rhizobium leguminosarum - Information on the sequencing of the genome of this nitrogen-fixing plant symbiont.