In microbiology and bacteriology, Gram stain (Gram staining or Gram's method), is a method of staining used to classify bacterial species into two large groups: gram-positive bacteria and gram-negative bacteria. #fyp #fypシ゚viral #microbiology #microbiologylab #microb #education #educationtiktok #laboratory #mediapreparation #microscope #learnontiktok #microbiologystudents #student #biology #microbiologist