Gram-positive bacteria show blue or purple after Gram-staining in a laboratory test. They have thick cell walls. Gram-negative bacteria show pink or red on staining and have thin walls. They release ...

A new study has found that common medications can accumulate in gut bacteria, altering bacterial function and potentially reducing the effectiveness of the drug. Common medications can accumulate in ...

Sweat rarely smells on its own. Body odour develops when bacteria on the skin break down compounds in sweat and release volatile chemicals that evaporate into the air.