Development of chemical assays

Paul EhrlichPaul Ehrlich

Development of chemical assays

In 1876, diagnoses based on observing clinical symptoms; if a patient responded positively to a disease-specific treatment, then they must have the disease.


Diagnostic testing began in 1882, when Paul Ehrlich observed that only the presence of typhoid bacillus (as identified with a certain dye) could prove a diagnosis of typhoid fever. Earlier diagnosis was based on the color of the skin.

Sterile Pharmaceutical Production

This is how pharmaceuticals are manufactured in TEVA Hungary


Today, we determine medical conditions by studying disease markers or drugs residues that can be chemically detected in blood, urine, feces, saliva, and (since 2007) perspiration. Laboratory testing, sophisticated computer-assisted analytical instruments, and at-home testing all measure fundamental chemical reactions.

Did you know?

The most common types of microscope are the optical microscope and the electron microscope. Typical magnification of a light microscope is up to 2,000x, while electron microscopes have a magnification capacity of 200,000x.