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Science Image Library: Mannitol Salt Agar (MSA)
Science Image Library
Mannitol Salt Agar Bacterial Growth Medium
from Science Prof Online
Bacteria growing on Mannitol Salt Agar, showing colony morphology.
Bacteria growing on Mannitol Salt Agar; weak mannitol fermenters on left, non-mannitol fermenters on right.
Nasal clinical samples on Mannitol Salt Agar (MSA). Growth on left plate mannitol fermenter. Right plate non-mannitol fermenter.
Nasal swab sample on Mannitol Salt Agar (MSA). Non-mannitol fermenter on left. Mannitol fermenter on right, viewed from bottom.
Nasal swab sample on Mannitol Salt Agar (MSA). Mannitol fermenter on left. Non-mannitol fermenter on right, viewed from top.
Staphylococcus epidermis growing on Mannitol Salt Agar, showing punctiform Staphylococcus epidermidis
Sterile Mannitol Salt Agar with reflection of camera.
Sterile, Labeled Mannitol Salt Agar (MSA).
You have free access to a large collection of materials used in a college-level introductory microbiology course. The Virtual Microbiology Classroom provides a wide range of free educational resources including PowerPoint Lectures, Study Guides, Review Questions and Practice Test Questions.
Page last updated 2/2016
Nasal samples plated on TSY (left) and Mannitol Salt Agar (right). Mannitol Salt showing halophilic bacteria that are normal flora of the nose.
Unknown bacteria plated on Mannitol Salt Agar (left) and MacConkey's Agar (right). Note that there is no growth on MacConkey's. What do you think the unknown bacterium is?
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VIDEO: Mannitol Salt Agar (MSA) Specialized
Bacterial Growth Medium
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Mannitol Salt Agar control plate. Staph aureus (top left) Staph epi (top right). Other sections inoculated with non-halophilic bacteria or sterile loop (negative control).
Additional Mannitol Salt Agar Resources
- Mannitol Salt Agar "Class Notes" article from the Virtual Microbiology Classroom.
- Identifying Bacteria Laboratory Exercise Main Page.
How Microbiologists Wish Each Other Happy Birthday!
Staph aureus on Mannitol Salt Agar
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