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Updated: Sep 13, 2026
Culture of Macrophage Colony-stimulating Factor Differentiated Human Monocyte-derived Macrophages
Published on: June 30, 2016
[A modified MacConkey medium]
1Department of Clinical Laboratory, Second Affiliated Hospital, Hunan Medical University, Changsha 410011.
Abstract:
We used MacConkey Agar(MCA) medium powder as a basis and added 6-benzoy-2-naphthyl phosphate disodium salt to modify MCA medium. This method was identified by examining several kinds of enteric pathogenic bacteria. Thus it allows us to observe lactose fermentative and phosphatase reaction simultaneously and to recognize Enterobacteriaceae from non-fermentable bacteria on primary culture plates according to the color of colony. This improved method simplifies the recognition procedure and shortens the time so that it is helpful to correctly choosing identification kit.
Insights
This study modified MacConkey Agar (MCA) medium to simultaneously detect lactose fermentation and phosphatase activity in enteric bacteria. The improved medium aids in rapid differentiation of Enterobacteriaceae from non-fermenters based on colony color.
Area of Science:
- Microbiology
- Bacteriology
- Clinical Diagnostics
Context:
- Accurate identification of enteric bacteria is crucial for diagnosing infections and guiding treatment.
- Traditional methods for differentiating enteric bacteria can be time-consuming and require multiple tests.
- MacConkey Agar (MCA) is a standard medium for isolating and differentiating Gram-negative bacteria based on lactose fermentation.
Purpose:
- To develop an improved culture medium for the simultaneous detection of lactose fermentation and phosphatase activity in enteric bacteria.
- To simplify and accelerate the primary identification of Enterobacteriaceae.
- To enhance the efficiency of bacterial identification kits.
Summary:
- A modified MacConkey Agar (MCA) medium was created by adding 6-benzoy-2-naphthyl phosphate disodium salt.
- This enhanced medium allows for the simultaneous observation of lactose fermentative and phosphatase reactions.
- Differentiation of Enterobacteriaceae from non-fermenting bacteria is achieved by observing colony color on primary culture plates.
Impact:
- The improved method simplifies bacterial recognition procedures.
- It significantly shortens the time required for initial identification.
- This facilitates the accurate selection of appropriate identification kits, improving diagnostic workflows.
