The Genus Bacillus
Chapter 7 The Genus Bacillus Bacilli are strictly aerobic or facultatively anaerobic, spore-forming rods (Figure 7-1). Most are catalase positive and motile, many are gram variable, and all are mediumto…
The Genera Aeromonas, Plesiomonas, and Vibrio
Chapter 20 The Genera Aeromonas, Plesiomonas, and Vibrio The genera Aeromonas, Plesiomonas, and Vibrio comprise gram-negative, facultatively anaerobic rods in the class γ-Proteobacteria. They ferment glucose and are usually oxidase…
The Family Rickettsiaceae
Chapter 43 The Family Rickettsiaceae Rickettsioses are some of the oldest diseases known to man. On one hand, epidemic typhus was responsible for large outbreaks of plaguelike illness in ancient…
The Genus Actinobacillus
Chapter 22 The Genus Actinobacillus Disease associated with members of the genus Actinobacillus(family Pasteurellaceae) was first reported in 1902, in the form of bovine subcutaneous abscesses from which gram-negative rods…
The Genus Lawsonia
Chapter 30 The Genus Lawsonia Lawsonia intracellularis is the etiologic agent of an intestinal hyperplastic disease called proliferative enteropathy. It is an obligate intracellular pathogen, and has not been cultivated…
The Genus Brucella
Chapter 25 The Genus Brucella Brucellosis was first described by British physician David Bruce, who in 1886 isolated a bacterium from the spleens of patients with a fatal disease known…
The Genus Dichelobacter
Chapter 36 The Genus Dichelobacter The genus Dichelobacter was created to accommodate the former Bacteroides nodosus, the cause of ovine footrot. The genus name derives from the two-clawed hooves of…
The Genera Proteus, Morganella, and Edwardsiella
Chapter 15 The Genera Proteus, Morganella, and Edwardsiella Members of these genera are facultatively anaerobic, non–lactose-fermenting, small, straight, gram-negative rods in the family Enterobacteriaceae. Colorless or whitish colonies are formed…
The Genus Corynebacterium
Chapter 8 The Genus Corynebacterium Members of the genus Corynebacterium are actinomycetes that are related to the genera Mycobacterium, Nocardia, and Rhodococcus. The genus comprises aerobic gram-positive pleomorphic rods (Figure…
Coxiella burnetii
Chapter 42 Coxiella burnetii Coxiella burnetii was originally named Rickettsia burnetii, and it shares rickettsial characteristics, including obligate intracellular growth, failure to stain by Gram’s method, and transmission, in some…
