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2016 ; 10
(3
): 033108
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Insulator-based dielectrophoretic diagnostic tool for babesiosis
#MMPMID27375817
Adekanmbi EO
; Ueti MW
; Rinaldi B
; Suarez CE
; Srivastava SK
Biomicrofluidics
2016[May]; 10
(3
): 033108
PMID27375817
show ga
Babesia species are obligate intraerythrocytic tick-borne protozoan parasites
that are the etiologic agents of babesiosis, a potentially life-threatening,
malaria-like illness in humans and animals. Babesia-infected people have been
known to suffer from complications including liver problems, severe hemolytic
anemia, and kidney failure. As reported by the Food and Drug Administration, 38%
of mortality cases observed in transfusion recipients were associated with
transfusion transmitted diseases of which babesiosis is the chief culprit. As of
now, no tests have been licensed yet for screening blood donors for babesiosis.
Current diagnostic tools for babesiosis including enzyme-linked immunosorbent
assay, fluorescence in situ hybridization, and polymerase chain reaction are
expensive and burdened with multifarious shortcomings. In this research, a
low-cost, high-specificity, quick, and easy-to-use insulator-based
dielectrophoretic diagnostic tool is developed for characterizing and
concentrating Babesia-infected cells in their homogenous mixture with healthy
cell population. In this work, a mixture of Babesia-infected (varying
parasitemia) and healthy red blood cells (RBCs or erythrocytes) was exposed to
non-uniform electric fields in a fabricated microfluidic platform to manipulate
and sort the Babesia-infected cells within a minute. At DC voltage configurations
of 10?V and 0/6?V in the inlet and the two outlet channels, respectively, the
diseased cells were seen to flow in a direction different from the healthy RBCs.
Bright field and fluorescence microscopy were utilized to present qualitative
differentiation of the healthy erythrocytes from the infected cells. The proposed
micro device platform was able to enrich RBCs from 0.1% to ?70% parasitemia. This
device, when finally developed into a point-of-care diagnostic chip, would
enhance the detection of Babesia-infected erythrocytes and as well serve as a
precursor to babesiosis vaccine development.