Susan L Spencer

US Patent:

58464395, Dec 8, 1998

Filed:

Feb 28, 1996

Appl. No.:

8/608422

Inventors:

Mark A. Borchardt - Marshfield WI
Susan Spencer - Spencer WI

Assignee:

Marshfield Medical Research & Education Foundation, a Division of
Marshfield Clinic - Marshfield WI

International Classification:

B01P 2126

US Classification:

210781

Abstract:

A method of concentrating oocysts of waterborne protozoan parasites from water potentially contaminated by dilute densities of the parasites is described. Potentially contaminated water is fed into the separation channel of a continuous separation channel centrifuge. The water is centrifuged for a period of time sufficient to collect the parasitic oocysts and cysts in the channel.

US Patent:

58582517, Jan 12, 1999

Filed:

Aug 11, 1997

Appl. No.:

8/909462

Inventors:

Mark A. Borchardt - Marshfield WI
Susan K. Spencer - Spencer WI

Assignee:

Marshfield Medical Research and Education Foundation, A Division of
Marshfield Clinic - Marshfield WI

International Classification:

B01D 126

US Classification:

210781

Abstract:

A method of concentrating waterborne pathogenic organisms from water potentially contaminated by dilute densities of the organisms is described. Potentially contaminated water is directed along an elongated flow path which rests generally within a plane perpendicular to an axis of rotation, and is subjected to centrifugal forces by rotating the flow path about the rotational axis. The method may be executed by use of a conventional continuous flow channel-type blood plasmapheresis centrifuge. The method has been tested for its capability for recovering pathogenic protozoan parasites such as Cryptosporidium and Giardia from contaminated water, and recovery rates of up to 100% have been observed.

US Patent:

59618469, Oct 5, 1999

Filed:

Feb 3, 1998

Appl. No.:

9/017832

Inventors:

Mark A. Borchardt - Marshfield WI
Susan K. Spencer - Spencer WI

Assignee:

Marshfield Medical Research and Education Foundation - Marshfield WI

International Classification:

B01D 2126

US Classification:

210781

Abstract:

A method of concentrating microorganisms, particularly pathogenic microorganisms, from food and/or water potentially contaminated by dilute densities of the organisms is described. Potentially contaminated water or fluid food is directed along an elongated flow path which rests generally within a plane perpendicular to an axis of rotation, and is subjected to centrifugal forces by rotating the flow path about the rotational axis. The method may be executed by use of a conventional continuous flow channel-type blood plasmapheresis centrifuge.