Gram-negative bacteria may appear red under the microscope because red-pink iodine ... Experts divide them into Gram-positive cocci or bacilli, depending on their shape. Gram-negative bacteria ...

in this case bacillus anthracis, to a specific disease. Koch learned that dyes helped to make bacteria visible and identifiable under the microscope, and published the first photographs of bacteria.

bead-like spores in samples under his microscope. Under certain conditions, the spores grew into the rodlike anthrax bacilli that cause the disease. Such spores can survive in soil for years ...

Instead, a laboratory technician must take a sample of sputum coughed up from the lungs, stain it and inspect it under a microscope ... scans microscope slides for the bacillus.

The Sputum is then examined by staining it to see the TB bacilli under the microscope. Then the sample is put into a growth medium and cultured for a few weeks - this tells us for which anti tb ...