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In 2154 the starship NX-01 visited a class M planet which unusual harboured a silicon-based virus. As Trip Tucker was well aware, thanks to Exobiology 101, the fact the virus was silicon-based was also a problem for the carbon-based crew of the Enterprise as their immune systems could not fight off such an alien attack. Fortunately for Trip, who had been infected, a cure was found. (ENT episode: "Observer Effect")
In 2364, when the USS Enterprise-D was en route to planet T-B 13, some of the first information about the planet the Enterprise could detect was that it was carbon-based and class M. (TNG comic: "... Where No One Has Gone Before!")
In 2369, a Horta-Human mining operation on Lythos Prime was attacked by a Borg cube when its sensors, confused by kelbonite deposits, mistakenly detected what it thought was a carbon-based/silicon-based hybrid species on the planet. (ST comic: "A Rolling Stone Gathers No Nanoprobes")
As of 2370 Starfleet tricorders were typically programmed to detect carbon-based life. They could also be set to detect silicon-based life, or both types working duel-function, but required specific recalibration to do so. (DS9 novel: Devil in the Sky)