With delicate hues of purple and pink, a lab technique called gram staining has reliably characterized bacteria for more than a century. Yet many scientists are mistaken about why the vivid method ...

What is a sputum Gram’s stain? A sputum Gram’s stain is a laboratory test that allows your doctor to diagnose a bacterial infection in your respiratory tract. They may order it if you have symptoms of ...

Google is celebrating the 166th birth anniversary of microbiologist Hans Christian Joachim Gram with a doodle in his honour. Gram was born on September 13, 1853, in Denmark’s Copenhagen. Gram is best ...