Micro-scale vegetablesControlled environment agriculturePathogensFood safetySalmonellaEscherichia coliMicrobial decontaminationESCHERICHIA-COLI O157-H7ALFALFA MEDICAGO-SATIVASALMONELLA-ENTERICALISTERIA-MONOCYTOGENESMICROBIOLOGICAL EVALUATIONFOODBORNE PATHOGENSFRESH PRODUCEGROWTHSURVIVALCOLONIZATION