Organism identifier

Organism identifiers were advanced devices that used automated technology to identify all organisms living within another and identified any present microorganisms that were abnormal in the host lifeform. These machines were used to identify infections, viruses, parasites, and were so precise that some could even be used to identify the presence of midichlorians.

Description
Identifiers were handheld devices that were physically plugged into a larger projection screen or datapad to display their readings (though some military models had a small integrated screen, eliminating the need of external equipment). The devices had a very small needle, sometimes retractable, at the end of the device, which would instantly gather a biological sample after being inserted by essentially pressing the device against the bare flesh of the host subject.

History
The use of computerized technology to identify infections and parasites dated back millennia, though modern-style identifiers would not be invented until 100 BBY, when a team of doctors, scientists, and computer experts on Coruscant developed the device based on already-existing devices used to identify cancer and diabetes. By 40 BBY, identifiers became commonplace in hospitals across the Core Worlds and among medical teams within the Republic Judicial Forces, though remained unavailable to the public market. It's also believed that masters within the Jedi Order also occasionally used identifiers to discover or measure Force-sensitivity, a feat very few technologies in the galaxy could achieve. During the Clone Wars, several corporations mass-produced identifiers for the Grand Army and the Jedi Order, leading to an excess of identifiers that ended up on the black market. In the subsequent Imperial era, medical units in various Imperial Army and stormtrooper units (and later New Republic Army) were equipped with mobile identifiers.