Bacterial pathogenesis
Learning Objectives: After reading this article you should be able to: define virulence, LD50 and ID50. describe the major stages of an infectious disease. list several factors that increase the…
Read More →Category: Microbiology
Microbiological Metabolism Study Questions
Are bacteria generally more resistant to antibiotics when they grow in suspension or in a biofilm? Why? Draw and label a typical bacterial growth curve. Describe what is happening during…
Read More →Biosynthesis
Bacterial metabolism results in products that are used for the synthesis of cellular constituents, like peptidoglycan, LPS, proteins, nucleic acids, etc.. You learned about the mechanisms of bacterial transcription of…
Read More →Fermentation of Sugars in Microorganisms
Fermentation refers to the breakdown of a monosaccharide to pyruvic acid and then usually to lactic acid. It is also called the glycolytic cycle and is the process by which…
Read More →Aerobic and Anaerobic Growth and Metabolism
The growth of most medically important organisms is enhanced by the presence of oxygen, which acts as the hydrogen acceptor in the final stages of energy production catalyzed by the…
Read More →Bacterial Metabolism
Bacteria cannot reproduce without a source of energy and the building blocks of cellular constituents (e.g. amino acids, carbohydrates, lipids). Minimum requirements for growth are a source of carbon and…
Read More →Growth Cycle in Microbiology
Growth Cycle Bacteria reproduce by binary fission: one cell divides to form 2 progeny cells. This results in exponential (logarithmic) growth. 1. Number of cells 1 2 4 8 16…
Read More →Metabolism in Microbiology
Learning Objectives: You should be able to: explain how bacteria reproduce and the potential effects of a short vs. a long generation time on the production of disease. describe the…
Read More →Bacterial Classification and Structure Study Questions
Study Questions List 8 major structural differences between prokaryotes and eukaryotes and/or draw a picture of each cell type that shows these differences (don’t forget to label the structures). is…
Read More →Specialized Structures Outside of the Cell Wall
Capsule Gelatinous layer surrounding the bacterial cell; gives many bacterial colonies a mucoid appearance. Composed of polysaccharide (except in Bacillus anthracis) which varies among bacteria and is used in identification.…
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