The criteriaforselectionofsignificant microbialstrainwerewell-
defined edgesandlargemeasurablezonediameterunderantibiotic
treatment. The16bacterialstrainsweretestedfortheirresponse
and susceptibilityagainstLevofloxacin. Amongalltestedstrains,
B. pumilus ATCC-14884 showedthemostsignificant resultatthe
same conditions.Hence, B. pumilus ATCC-14884 strainwasused
further forone-level(5þ1) bioassaystudy.