What is a common laboratory method to identify Actinomycetes?

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Question: What is a common laboratory method to identify Actinomycetes?

Options:

Correct Answer: Gram staining

Solution:

Gram staining is commonly used to identify Actinomycetes, which are typically Gram-positive.

What is a common laboratory method to identify Actinomycetes?

What is a common laboratory method to identify Actinomycetes?

Step 1: Prepare a sample of the bacteria you want to test for Actinomycetes.
Step 2: Place a small amount of the sample on a glass slide.
Step 3: Heat-fix the sample by passing the slide through a flame to kill the bacteria and make them stick to the slide.
Step 4: Stain the sample with crystal violet dye and let it sit for a minute.
Step 5: Rinse the slide with water to remove excess dye.
Step 6: Apply iodine solution to the slide and let it sit for another minute.
Step 7: Rinse the slide again with water.
Step 8: Decolorize the slide with alcohol or acetone for a few seconds, then rinse with water.
Step 9: Stain the slide with safranin dye and let it sit for a minute.
Step 10: Rinse the slide one last time with water and let it dry.
Step 11: Observe the slide under a microscope to check if the bacteria are purple (Gram-positive) or pink (Gram-negative).
Step 12: If the bacteria are purple, they are likely Actinomycetes.

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