MicroBiology-Draft/Sample

Chapter 4 Prokaryotic Diversity Figure 4.1 The bacteriumShewanellalives in the deep sea, where there is little oxygen diffused i ...

4.1 Prokaryote Habitats, Relationships, and Microbiomes Learning Objectives Identify and describe unique examples of prokaryote ...

The existence of prokaryotes is very important for the stability and thriving of ecosystems. For example, they are a necessary p ...

Figure 4.3 (a) Nitrogen-fixing bacteria such asRhizobiumlive in the root nodules of legumes such as clover. (b) This micrograph ...

can havecooperative interactions, which benefit the populations, orcompetitive interactions, in which one population competes wi ...

microbiota. The resident microbiota consists of microorganisms that constantly live in or on our bodies. The term transient micr ...

Taxonomy and Systematics Assigning prokaryotes to a certain species is challenging. They do not reproduce sexually, so it is not ...

Based on their prevalence of guanine and cytosine nucleotides, gram-positive bacteria are also classified into low G+C and high ...

4.2 Proteobacteria Learning Objectives Describe the unique features of each class within the phylum Proteobacteria: Alphaproteo ...

Chlamydiais another taxon of the Alphaproteobacteria. Members of this genus are extremely resistant to the cellular defenses, gi ...

Class Alphaproteobacteria Genus Microscopic Morphology Unique Characteristics Bartonella Gram-negative, pleomorphic, flagellated ...

Neisseriaare cocci that live on mucosal surfaces of the human body. They are fastidious, or difficult to culture, and they requi ...

Part 2 When Marsha finally went to the doctor’s office, the physician listened to her breathing through a stethoscope. He heard ...

hypersecretion of electrolytes and water in the large intestine, leading to profuse watery diarrhea and dehydration. V. parahaem ...

both). The noncoliforms include some notable human pathogens, such asSalmonellaspp., Shigellaspp.,andYersinia pestis. E. colihas ...

Class Gammaproteobacteria Example Genus Microscopic Morphology Unique Characteristics Hemophilus Gram-negative bacillus Pleomorp ...

the plasma membrane and the cell wall, feeding on the host’s proteins and polysaccharides. The infection is lethal for the host ...

Epsilonproteobacteria The smallest class of Proteobacteria isEpsilonproteobacteria, which are gram-negative microaerophilic bact ...

4.3 Nonproteobacteria Gram-Negative Bacteria and Phototrophic Bacteria Learning Objectives Describe the unique features of nonp ...

Figure 4.13 Spirochetes are typically observed using darkfield microscopy (left). However, electron microscopy (top center, bott ...