Microbiology tidbits from an MLT working in clinical microbiology.
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Bacillus anthracis
This image depicted numbers of Bacillus anthracis bacterial colonies, which had been allowed to grow on sheep’s blood agar (SBA) for a 24 hour period. In this particular view you’ll note the appearance of what is termed a “plaque” (arrowhead), which represents an area where the bacteria had been lysed, or destroyed by the application of a localized amount of gamma phage-containing solution. Image courtesy CDC. (via MicrobeWorld)