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Title: Compositions and methods for pathogen transport

Patent ·
OSTI ID:1236565

This disclosure provides a method for transporting a pathogen under ambient conditions, by culturing the pathogen with an amoeba under conditions that favor the incorporation of the pathogen into a trophozoite, starving the amoeba until it encysts, then culturing under conditions that favor conversion of the amoeba back to a trophozoite. In one aspect, the conditions that favor incorporation of the pathogen into the cyst of the amoeba comprises contacting the pathogen with the amoeba in an iron rich environment. Virus and/or bacteria are pathogens that can be transported by the disclosed method. Amoeba that are useful in the disclosed methods include, without limitation Acanthamoeba castellanii, Hartmannella vermiformis and Naegleria gruberi. The disclosed methods have utility in: transporting pathogens from military field hospitals and clinics to the laboratory; transporting pathogens from global satellite laboratories to clinical laboratories; long term storage of pathogens; enriching contaminated patient samples for pathogens of interest; biosurveillance and detection efforts.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC52-07NA27344
Assignee:
Lawrence Livermore National Security, LLC
Patent Number(s):
9,243,222
Application Number:
14/148,484
OSTI ID:
1236565
Resource Relation:
Patent File Date: 2014 Jan 06
Country of Publication:
United States
Language:
English

References (23)

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Listeria monocytogenes virulence factor Listeriolysin O favors bacterial growth in co-culture with the ciliate Tetrahymena pyriformis, causes protozoan encystment and promotes bacterial survival inside cysts journal January 2010
Recent Advances in the Treatment of Acanthamoeba Keratitis journal August 2002
Acanthamoeba castellanii: Growth, encystment, excystment and biocide susceptibility journal January 1998
Amoebae-resisting Bacteria Isolated from Human Nasal Swabs by Amoebal Coculture journal March 2004
The growth-promoting action of Iron upon Acanthamoeba journal January 1971
The Neff strain of Acanthamoeba castellanii, a tool for testing the virulence of Mycobacterium kansasii journal May 2007
Ecology of Free-Living Amoebae journal January 1994
Method of and apparatus for collecting cultures patent March 1977
Method of and apparatus for collecting cultures patent January 1980
Antibiotic susceptibility testing patent May 1984
Device for self contained solid phase immunodiffusion assay patent September 1988
Swab transport system patent March 1989
Devices and methods for detection of an analyte based upon light interference patent February 1996
Campy-Cefex selective and differential medium for campylobacter patent April 1999
Method and apparatus for automatically inoculating culture media with bacterial specimens from specimen containers patent September 2003
Systems and methods for transmitting pathogen related information and responding patent November 2011
Therapeutic amoeba and uses thereof patent October 2013
Swab for collecting biological specimens patent March 2015
Systems and methods for multi-analysis patent-application October 2014

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