Abstract: A pipette capable of accurately picking up, mixing and dispensing liquids in predetermined ratios without instrument calibration is disclosed. The pipette apparatus has cooperable shoulder means for accurately regulating relative movement of the pipette plunger means and casing to permit the sequential and separate pick up of different liquids, the mixing of the different liquids within the apparatus and the dispensing of the mixed liquids from the apparatus.

Abstract: A self-contained rehydratable microtiter type device is disclosed in which concentrations of suitable agents are predeposited and dried in growth wells and are then rehydrated with aliquot amounts of the inoculum to be tested. The apparatus and system permit the detection, identification and grouping of urinary tract pathogens.

Abstract: A test device for determining the presence of a constituent in a sample, and a method for making it are disclosed. The test device comprises reactants (e.g. reagents, enzymes, etc.) incorporated with a carrier matrix such that when the device is wetted with a test sample, the reactants and the constituent react to produce a detectable response. The reactants are positioned separately from each other on the matrix in substantially, discrete, non-contacting areas. Hence, reactants are maintained substantially separate from each other until the test device is wetted with the sample.