ftp.cdc.gov - /pub/infectious_diseases/artesting/images_photos/beta_lactamase/

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 6/14/2002  9:28 AM        12321 blac_molecule.jpg
 6/14/2002  9:28 AM       158027 gram_negative.jpg
 6/14/2002  9:28 AM       164085 gram_positive.jpg
 6/14/2002  9:28 AM        49641 plasmid 1.jpg
 6/14/2002  9:28 AM        49209 plasmid.jpg