a flexible plastic microscope slide which can be folded over such that a viewing portion of the slide can be placed against a specimen to obtain a sample directly therefrom without the need of transferring devices , thereby reducing biological hazards . the slide is designed for on - site collection , staining , and viewing of cells in biological fluid and tissue samples , preferably with an epi - fluorescence microscope . this novel slide permits point - of - care screening in a matter of minutes of any biological fluid or tissue sample for presence of infectious agents .