This chemical dye can stain thick peptidoglycan layers. Under ... streptococci normally exist in the body. They’re typically found in the skin, mouth, intestinal tract, and genital tract. When ...

Label a clean glass ... all staphylococci, all streptococci and some listeria species. Credit: Technology Networks Gram negative bacteria appear a pale reddish color when observed under a light ...

Gram staining is one way scientists can identify bacteria. Gram-positive bacteria, such as Staphylococcus, appear blue or purple under a microscope ... including strep throat and sinus infections.

Label a clean glass ... all staphylococci, all streptococci and some listeria species. Credit: Technology Networks Gram negative bacteria appear a pale reddish color when observed under a light ...