Devices (10, 50) are described herein which combine an integrated diagnostic strip (26, 52) and an attachment for the collection of saliva or the collection of blood. In the preferred embodiment for collection and testing of saliva, the integrated collection and assay device includes a collapsible funnel shaped saliva collector (16), a saliva processing pad (24) and one or more diagnostic assay strips (26). The collector, pad, and assay strips are in fluid communication with each other, thereby permitting capillary flow of saliva from the funnel to the assay strips. The device can be used for collection of blood in the same manner as the saliva. In the embodiment of the device for the collection and analysis of a blood sample, a needle (58) and needle receptacle are attached to the strip (52) to allow collection and direct application of blood to the strip, avoiding any contact by the party collecting the blood. Assay strips (64) can be incorporated into the collection device, as well as an absorbent pad (66) or filter to remove unwanted tissue or red blood cells from the sample.