Patents Assigned to R&F Laboratories, Inc.
  • Method for isolation and identification of Escherichia coli 0157:H7 and plating media for said process
    Patent number: 6617149
    Abstract: An isolation plating medium for use in processes for the presumptive identification of Escherichia coli 0157:H7 from a sample that also contains other strains of Escherichia coli. The plating medium comprises at least one carbohydrate that Escherichia coli 0157:H7 is incapable of fermenting, but other strains of Escherichia coli do ferment said carbohydrate, a pH indicator dye that changes the color of the plating medium to a first color when the pH of the medium changes, a chromogenic substrate that reacts to beta-galactosidase to form a precipitate in the plating medium of a second color which contrasts with the first color.
    Type: Grant
    Filed: March 18, 2002
    Date of Patent: September 9, 2003
    Assignee: R&F Laboratories, Inc.
    Inventor: Lawrence Restaino
  • Method for isolation and identification of Escherichia coli 0157:H7 and plating media for said process
    Patent number: 6087156
    Abstract: A solid plating medium for the presumptive detection of Escherichia coli 0157:H7 which comprises (1) an ingredient which promotes growth of Escherichia coli cells under incubation, (2) an ingredient which inhibits growth of gram positive microorganisms under incubation, (3) an ingredient that inhibits growth of Proteus sp.
    Type: Grant
    Filed: October 23, 1998
    Date of Patent: July 11, 2000
    Assignee: R&F Laboratories, Inc.
    Inventor: Lawrence Restaino