How does an electron microscope help pathologists study disease?

Electron microscopy is a vital tool in pathology because it provides significantly higher resolution and magnification than traditional light microscopy, allowing researchers and clinicians to examine biological structures at the nanometer scale.123

Pathologists utilize two primary types of electron microscopy to study disease:

• Transmission Electron Microscopy (TEM): By passing an electron beam through thin, prepared samples, TEM allows for the visualization of the interior structure of cells and tissues. This is essential for identifying fine cellular abnormalities, such as changes in organelles, that are invisible under light microscopes.145
• Scanning Electron Microscopy (SEM): This technique scans a beam of electrons across a specimen to produce three-dimensional images of surface structures. It is particularly useful for examining the surface topography of cells, small organisms, or pathogens.142

Furthermore, these techniques can be combined with other methods, such as immunosorbent electron microscopy, where specimens undergo antigen-antibody reactions to specifically identify pathogenic agents like bacteria and viruses. By enabling the detailed characterization of cellular components and pathogens, electron microscopy plays a critical role in the accurate diagnosis and study of disease pathology.65