Gram staining is one way scientists can identify bacteria. Gram-positive bacteria, such as Staphylococcus, appear blue or purple under a microscope when scientists apply a stain. Conversely, ...
Gram-positive bacteria have thick cell walls. A Gram stain test, which involves a chemical dye, stains the bacterium’s cell wall purple. On the other hand, gram-negative bacteria stain pink instead.
A bad bacterium may make colon cancer worse. Streptococcus gallolyticus spurred growth of some colon cancer cells in lab dishes and in mice, researchers report July 13 in PLOS Pathogens. S.
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