method is disclosed in united state patent application publication no us2010 0070185 on an invention of ronald t kurnick and martin tiz published on mar 18 2010 which patent application is incorporated by reference to the same extent as though fully disclosed herein the bacteria detection processes using bacteriophage can be configured to determine antibiotic susceptibility of the target bacteria and the invention is also applicable to such an antibiotic susceptibility test for example a sample potentially containing target bacteria is divided into two parts sample one and sample two a phage amplification process or phage capture assay process measuring the change in bacteriophage concentration or change in the rate of change of the bacteriophage concentration described previously is performed on sample one to ascertain the presence of the target bacteria in the sample samples one and two are tested simultaneously or serially beginning with sample one if the presence of the target bacteria is already known via some other method then sample one is not needed nor is the associated phage assay sample two is treated differently an antibiotic is added to sample two at a specific concentration then sample two is optionally incubated for a predetermined period of time to allow the antibiotic to act upon the target bacteria a reagent containing phage that is specific to the target bacteria is added to sample two and sample two is incubated optionally for a predetermined time the previously described phage amplification assay process or phage capture binding assay detection process measuring.