Sites for companies or individual analytical laboratories that have established procedures in place to perform tests on submitted samples, to identify, assay, analyze, or aid research in chemical content of biological samples.  This includes chemical test to identify and quantify bacteria in samples, as well as other analytes.  Note that where these microbiological tests are part of methods to analysis samples to study environmental impact, such as coliform bacteria in water and soil, then these sites should be found in Environmental Chemistry. . . Testing Services.