Chapter 13 The Genera Escherichia and Shigella The genera Escherichia and Shigella are class γ-proteobacteria, in the order Enterobacteriales and family Enterobacteriaceae. THE GENUS ESCHERICHIA The genus Escherichia was named…
Chapter 31 The Genus Leptospira Leptospirosis is encountered commonly by those dealing with animal infectious disease. Its occurrence as a zoonotic infection of humans is strongly influenced by connections to…
Chapter 26 The Genus Francisella Francisella tularensis was isolated in 1912, during studies of a plaguelike disease in rodents in Tulare County, California, from which the specific name is derived….
Chapter 9 The Genera Dermatophilus and Nocardia THE GENUS DERMATOPHILUS Members of the genus Dermatophilus are aerobic, gram-positive, branching, filamentous rods. They produce motile zoospores, and aerial mycelia are ordinarily…
Chapter 38 The Genera Prevotella and Porphyromonas Prevotella spp. and Porphyromonas spp. are obligately anaerobic, non–spore-forming, nonmotile, pleomorphic rods. Both genera have taxonomic placement in the class Bacteroides, order Bacteroidales;…
Chapter 19 The Genera Pseudomonas and Burkholderia The genus Pseudomonas was described more than a century ago and has been completely revised on multiple occasions because of taxonomic heterogeneity. The…
Chapter 34 Other Gram-Positive Anaerobes THE GENUS ACTINOBACULUM Actinobaculum suis is the current stopover on a taxonomic odyssey beginning with the genus Corynebacterium and moving to Eubacterium and Actinomyces. However,…
Chapter 6 The Genera Actinomyces and Arcanobacterium THE GENUS ACTINOMYCES Members of the genus Actinomyces are grampositive, non–acid-fast, non–spore-forming rods. They are facultatively anaerobic, and most species prefer a reduced…
Chapter 4 The Genus Staphylococcus THE GENUS STAPHYLOCOCCUS The gram-positive aerobic cocci are conve-niently divided into two groups based on cata-lase production. The family Micrococcaceae (genera Micrococcus, Staphylococcus, and Rothia…
Chapter 1 Origin and Evolution of Virulence Virulence, simply defined, is microbial specialization that facilitates replication in hosts. The resulting damage to the host may be so minimal that it…
