ABSTRACT
Enterobacteriaceae are catalase positive and oxidase negative, and the carbohydrate utilization is fermentative. Both motile and nonmotile species occur.
10.1 Gammaproteobacteria .......................................................................... 177 10.1.1 Enterobacteriaceae .................................................................... 177
10.1.1.1 Impact on the host ...................................................... 178 10.1.1.2 Characteristics of the agent ...................................... 180
10.1.2 Pasteurellaceae .......................................................................... 186 10.1.2.1 Impact on the host ...................................................... 186 10.1.2.2 Characteristics of the agent ...................................... 188
10.1.3 Pseudomonadacea .................................................................... 191 10.1.3.1 Pseudomonas .............................................................. 191
10.1.4 Francisellaceae ........................................................................... 192 10.1.4.1 Francisella ................................................................... 192
10.1.5 Aeromonadaceae, Xanthomonadaceae, Sphingomonadaceae, and Moraxcellaceae ............................ 194
10.2 Betaproteobacteria ................................................................................ 195 10.2.1 Alcaligenaceae ........................................................................... 195
10.2.1.1 Bordetella .................................................................... 195 10.2.2 Spirillaceae ................................................................................. 196
10.2.2.1 Spirillum minus ............................................................ 196 10.3 Epsilonproteobacteria ........................................................................... 197
10.3.1 Campylobacteraceae ................................................................. 197 10.3.1.1 Campylobacter ............................................................ 197
10.3.2 Helicobacteraceae ...................................................................... 199 10.3.2.1 Helicobacter ................................................................ 199 10.3.2.2 Rabbit-associated cilia-associated respiratory
bacillus ......................................................................... 203 10.4 Alphaproteobacteria ............................................................................. 203 References ........................................................................................................ 204
10.1.1.1 Impact on the host Some Enterobacteriaceae (e.g., Proteus, Morganella, and to some extent Escherichia) are commensal members of the gut microbiota; others (e.g., Salmonella and Yersinia) are highly undesirable facultative pathogens in laboratory animal colonies. They are the primary carriers of the Tolllike receptor 4 stimulating lipopolysaccharides (LPSs) in their cell walls (Chapter 6), and when reducing type 1 diabetes by preweaning treatment of nonobese diabetic (NOD) mice with vancomycin, one of the observations in the puppies is an increase in the abundance of Proteobacteria.1
