The first step in most bacterial staining procedures is the preparation of a smear. In a smear preparation, cells from a culture are spread in a thin film over a small area of a microscope slide, ...

In smear microscopy — a technique developed in the 1870s — sputum samples are smeared on a microscope slide and stained with a dye that binds to the bacteria that cause the disease.

These dyes are repelled by the negatively charged surface of bacterial cells. Thus, they stain the background, leaving the bacterial cells clear and bright against a dark background. Heat Fixation: ...

A viral video claims that Pap smears can damage the cervix, raising concerns among women. But is this fact or myth? We got in touch with renowned experts who debunk misconceptions, explaining the ...