Homework Answers
Serratia Marcescens-
Serratia marcescens is a species of bacteria with rod-shape. It is a Gram-negative bacteria, that is also a facultative anaerobic organism,
At 37°, the culture broth of Serratia marcescens is white in color.
Serratia marcescens grows at 37°C, but it can grow in temperatures that range from 5–40°C. They grow in pH levels that range from 5 to 9.
Serratia marcescens is well known for the red pigmentation it produces called prodigiosin.
Appearance of nutrient broth- white
Better growth temperature- 37 degree celsius
Oxygen requirement- Facultative anaerobe
Colony appearance on agar-
colonies are 1-2 mm in size and are round, glabrous, convex and slightly umbonate with entire margins, and opaque.
Pigmentation- Yes (red pigmentation)
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Serratia Marcescens
Culture Characteristics Appearance of Nutrient Broth Better Growth Temperature Oxygen Requirement Colony Appearance on...
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working with the Microscope slides. The second part is working with
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research.
Below is the following bacterium you need to describe and include
an image for.
• Streptococcus
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• Klebisella pneumonia
• Unstained Bacillus
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microbiology help
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2. You are given a mixed broth culture of Pseudomonas fluorescence (Gram-negative) and Clostridium sporogenes (Gram-positive). You are instructed to isolate and purify each bacterial species. How are you going to do it? Your goal is to have a plate of pure P. fluorescence with isolated colonies and a plate of pure C. sporogenes with isolated colonies. Explain in detail how you are going to perform the exercise. You can use any media you like such as nutrient agar plate,...
Directions: There are two parts for this lab. The first part is
working with the Microscope slides. The second part is working with
media.
Task 1 – Bacteriology Survey Microscope Slides
Directions: There are eight different bacterium you need to
research.
Below is the following bacterium you need to describe and include
an image for.
• Streptococcus
• Treponema
• Neisseria gonorrhoeae
• Klebisella pneumonia
• Unstained Bacillus
• Bacillus cereus
• Clostridium tetani
• Escherichia coli
Task 2 –...
microbiology help
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