The long term goal of this project is the development of an ultrasensitive integrated platform for the antigendetection diagnosis of multiple potential bioterror agents, based on the novel technology of microfabricated retro-reflectors. It is widely accepted that most terrorist attacks are covert, and therefore the infectious agent will be unknown until the first person becomes acutely ill and seeks medical help. The availability of an instrument capable of detecting several agents simultaneously would greatly enhance our response to a possible bioterror attack because of the ability to screen patients presenting with non-specific signs and symptoms (the vast majority) or the possibility of testing based on syndromic presentation. We have demonstrated the inexpensive fabrication and very high detectability of micron-scale retroreflectors, and brightness modulation by gold nanoparticles and magnetic particles (for integration with sample preparation) in an analyte-responsive manner. A few hundred 40 nm particles, or a single 2.8 urn magnetic bead, can be reliably detected on each element of a large retroreflector array, with simple optics potentially costing less than $1000. Testing is underway with rickettsiae and with human clinical samples for Norwalk virus and other noroviruses. Very high specificity can be achieved using magnetic and/or fluid-shear removal of non-specifically bound particles, by tight control of reflector brightness uniformity, and by the use of colocated reference reflectors. We propose development of a microfluidics-based portable, user-friendly, accurate and ultrasensitive device capable of detecting multiple pathogens in parallel. Testing will initially focus on Francisella tularensis, Cryptosporidium parvum, Rift Valley fever virus, Norwalk virus, and Rickettsia rickettsii, and will coordinate with the Diagnostics Theme investigators and WRCE subject matter experts on these agents. Testing will begin in vitro with attenuated or killed agent, and progress to testing with animal and human specimens, and with virulent agents in the University of Texas Medical Branch's BSL-3 and BSL-4 facilities.

Public Health Relevance

The proposed work will result in the development of a new, ultrasensitive diagnostic technology and its integration into a platform device capable of rapidly detecting multiple pathogens in clinical specimens. The low cost, low operating cost, portability, and multiplexing capability of the device will support routine, syndrome-based multiagent diagnostic assays at the point-of-care.

Agency
National Institute of Health (NIH)
Institute
National Institute of Allergy and Infectious Diseases (NIAID)
Type
Specialized Center--Cooperative Agreements (U54)
Project #
5U54AI057156-09
Application #
8377050
Study Section
Special Emphasis Panel (ZAI1-DDS-M)
Project Start
2012-03-01
Project End
2014-02-28
Budget Start
2012-03-01
Budget End
2013-02-28
Support Year
9
Fiscal Year
2012
Total Cost
$521,267
Indirect Cost
$80,484
Name
University of Texas Medical Br Galveston
Department
Type
DUNS #
800771149
City
Galveston
State
TX
Country
United States
Zip Code
77555
Pandey, Aseem; Lin, Furong; Cabello, Ana L et al. (2018) Activation of Host IRE1?-Dependent Signaling Axis Contributes the Intracellular Parasitism of Brucella melitensis. Front Cell Infect Microbiol 8:103
Russell-Lodrigue, Kasi E; Killeen, Stephanie Z; Ficht, Thomas A et al. (2018) Mucosal bacterial dissemination in a rhesus macaque model of experimental brucellosis. J Med Primatol 47:75-77
Matz, L M; Kamdar, K Y; Holder, M E et al. (2018) Challenges of Francisella classification exemplified by an atypical clinical isolate. Diagn Microbiol Infect Dis 90:241-247
Langsjoen, Rose M; Haller, Sherry L; Roy, Chad J et al. (2018) Chikungunya Virus Strains Show Lineage-Specific Variations in Virulence and Cross-Protective Ability in Murine and Nonhuman Primate Models. MBio 9:
Raja, B; Goux, H J; Marapadaga, A et al. (2017) Development of a panel of recombinase polymerase amplification assays for detection of common bacterial urinary tract infection pathogens. J Appl Microbiol 123:544-555
Nunes, Marcio R T; Contreras-Gutierrez, María Angélica; Guzman, Hilda et al. (2017) Genetic characterization, molecular epidemiology, and phylogenetic relationships of insect-specific viruses in the taxon Negevirus. Virology 504:152-167
Rossetti, Carlos A; Drake, Kenneth L; Lawhon, Sara D et al. (2017) Systems Biology Analysis of Temporal In vivo Brucella melitensis and Bovine Transcriptomes Predicts host:Pathogen Protein-Protein Interactions. Front Microbiol 8:1275
Paterson, Andrew S; Raja, Balakrishnan; Mandadi, Vinay et al. (2017) A low-cost smartphone-based platform for highly sensitive point-of-care testing with persistent luminescent phosphors. Lab Chip 17:1051-1059
Silvas, Jesus A; Popov, Vsevolod L; Paulucci-Holthauzen, Adriana et al. (2016) Extracellular Vesicles Mediate Receptor-Independent Transmission of Novel Tick-Borne Bunyavirus. J Virol 90:873-86
Park, Arnold; Yun, Tatyana; Vigant, Frederic et al. (2016) Nipah Virus C Protein Recruits Tsg101 to Promote the Efficient Release of Virus in an ESCRT-Dependent Pathway. PLoS Pathog 12:e1005659

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