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Bacteria Growth Curve

In the module 3 case assignment you will explore bacterial growth and methods used to measure the growth of microbes. After you have read the information in the background readings and home page you should prepare a paper addressing the topics below:

1. Discuss the four phases of the bacterial growth curve.

2. Explain two methods used to measure microbial growth.

3. Discuss two methods used to control microbial growth.

The book Antibacterial Agents: Chemistry, Mode of Action, Mechanisms of Resistance and Clinical Applications on your ebrary bookshelf will be an important place to begin your research on this topic.

Case Assignment Expectations

Length: Case Assignment Module assignments should be at least 2-4 pages (400-800 words) in length.

References: At least two references should be included from academic sources (e.g. peer-reviewed journal articles). Required readings are included. Quoted material should not exceed 10% of the total paper (since the focus of these assignments is critical thinking). Use your own words and build on the ideas of others. When material is copied verbatim from external sources, it MUST be enclosed in quotes. The references should be cited within the text and also listed at the end of the assignment in the References section (preferably in APA format).

Organization: Subheadings should be used to organize your paper according to question

The following items will be assessed in particular:

Relevance (e.g. all content is connected to the question)
Precision (e.g. specific question is addressed. Statements, facts, and statistics are specific and accurate).
Depth of discussion (e.g. present and integrate points that lead to deeper issues)
Breadth (e.g. multiple perspectives and references, multiple issues/factors considered)
Evidence (e.g. points are well-supported with facts, statistics and references)
Logic (e.g. presented discussion makes sense, conclusions are logically supported by premises, statements, or factual information)
Clarity (e.g. writing is concise, understandable, and contains sufficient detail or examples)
Objectivity (e.g. avoid use of first person and subjective bias)

Solution Preview

In the module 3 case assignment you will explore bacterial growth and methods used to measure the growth of microbes. After you have read the information in the background readings and home page you should prepare a paper addressing the topics below:
1. Discuss the four phases of the bacterial growth curve.
2. Explain two methods used to measure microbial growth.
3. Discuss two methods used to control microbial growth.

Introduction

Bacteria are the most abundant microorganism on Earth. There are more bacteria in the world than the whole population of human, plants, and insects. Bacteria have a fast generation time and grow rapidly. The growth in bacteria involve an increase in cell mass and number of ribosomes. Its involve the duplication of bacterial chromosomes, synthesis of new cell wall and plasma membrane, and cell division. Bacteria growth is through an asexual process called binary fission. Binary fission is when the cells divide into two cells. The time interval in which bacteria cell divide is called the generation time. The generation time can be as short as 15 minutes to as long as several days. When a bacteria is grown in a closed system (batch culture like a test tube), the population of bacteria cells shows several growth dyanamics in what is known as the bacterial growth curve. (1)

Four phases of growth cycle

Lag phase. When the bacteria cells are inoculated into fresh medium, the cells initially adjust to the new medium. During the lag phase, there is no cell division, but the cells is growing in ...

Solution Summary

Bacteria are the most abundant microorganism on Earth. There are more bacteria in the world than the whole population of human, plants, and insects. Bacteria have a fast generation time and grow rapidly. The growth of bacteria involves an increase in cell mass and number of ribosomes. When bacteria are grown in a closed system (batch culture like a test tube), the population of bacteria cells shows several growth dynamics in what is known as the bacterial growth curve. The phases of the bacterial growth curve include the lag phase, exponential phase, stationary phase, and death phase.

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