Patent ID: 7961311

Claim:
A method for detecting bacteria suspended in a biological fluid by means of a system for detecting bacteria having a light source for generating an illuminating light beam having an axis to illuminate a portion of said biological fluid and a light detector for receiving light forwardly scattered by said portion of biological fluid, wherein said portion of biological fluid contained in a cuvette axially disposed with said illuminating beam, and wherein said cuvette has a skewed sidewall and two windows, said method comprising: a. decreasing the level of direct illuminating light propagating towards said light detector; b. decreasing the level of light reflected off any of said sidewall and windows propagating towards a predefined segment disposed across a plane of said light detector; c. measuring the intensity of light scattered by said biological fluid at least at one scattering angle; d. comparing said measured intensities to a calibration scale, and wherein said at least one scattering angle measured relative to said axis, and wherein said at least one scattering angle does not exceed a predefined maximal scattering angle and wherein said decreasing the level of light reflected off any of said sidewall and windows accomplished by inclining said sidewall and windows relative to the normal of said axis.