Abstract: Disclosed is a device for determining a concentration of cells of a given size in a sample of fluid, the sample comprising a plurality of cells, comprising: a light source arranged to emit light along a central axis to illuminate the plurality of cells in the fluid sample; a detector arranged to receive light at a plurality of displacements from the central axis, the light having passed through the plurality of cells in the fluid sample, and to produce a plurality of signals, each associated with, and indicative of an intensity of the received light at, a respective one of the plurality of displacements; and a processor arranged to determine a concentration of cells of a given size, based on the plurality of signals from the detector, wherein the processor is arranged to compare the plurality of signals from the detector with one or more pre-stored thresholds or profiles, indicative of a particular concentration.

Abstract: A device for determining the presence of microorganisms in a sample and the antimicrobial sensitivity thereof, the device comprising multiple chambers including: —a first control chamber; and —a first test chamber; wherein said first control chamber comprises: —media and/or nutrients that support or encourage microbial growth; and —a tetrazolium indicator compound; and said first test chamber comprises: —media and/or nutrients that support or encourage microbial growth; —a tetrazolium indicator compound; and —a first selective agent which inhibits the growth and/or replication of one or more specific microorganisms.

Abstract: A method of determining the presence of a threshold concentration of leukocyte cells in a sample, the method comprising (i) contacting the sample with a leukocyte detection means comprising (a1) an indicator compound; and (ii) examining the leukocyte detection means to determine whether leukocytes are present.

Abstract: A method of analysing a sample taken from a dialysis patient for the presence of microorganisms, said method comprising the steps of: (i) contacting the sample with (I) a first reporting means comprising: (a1) an indicator compound; and (b1) media and/or nutrients that support or encourage microbial growth; and (ii) examining the reporting means.