This is because the structure of their cell wall is unable to retain the crystal violet stain so are colored only by the safranin counterstain. Examples of gram negative bacteria include enterobacter ...

and Clostridium turn purple with Gram stain. Other species like Escherichia, Helicobacter, and Salmonella are gram-negative, meaning they don’t change color with Gram stain. However, for some ...

We report the occurrence of sepsis due to infection with Salmonella enterica serotype ... to the platelet transfusion was suspected, and Gram's staining of plasma from the retained segment of ...

This is because the structure of their cell wall is unable to retain the crystal violet stain so are colored only by the safranin counterstain. Examples of gram negative bacteria include enterobacter ...