In Vitro Monitoring of Babesia microti Infection Dynamics in Whole Blood Microenvironments

Area of Science:

• Infectious Diseases
• Microfluidics
• Parasitology

Background:

• Babesiosis, caused by Babesia microti, is an emerging tick-borne disease.
• Traditional studies rely on animal models, which have limitations compared to human sample analysis.
• Microfluidic systems offer enhanced assay capacity, cost-effectiveness, and direct human sample analysis.

Purpose of the Study:

• To develop and report an open microfluidic platform, µ-Blood, for real-time, continuous monitoring of Babesia microti infection dynamics in vitro.
• To enable direct examination of infected and uninfected whole human blood, preserving the natural microenvironment.
• To facilitate extended monitoring of infection progression and parasite-host interactions.

Main Methods:

• Development of an open microfluidic platform named µ-Blood.
• Direct analysis of whole human blood, eliminating preprocessing steps like dilution or cell isolation.
• Label-free phase contrast and fluorescence confocal microscopy for real-time monitoring over 72 hours.

Main Results:

• The µ-Blood platform allows direct, artifact-minimized examination of the whole blood microenvironment.
• Enabled extended (72-hour) monitoring of Babesia microti infection dynamics.
• Facilitated parasite identification, parasitemia measurement, and analysis of parasite-host cell interactions.

Conclusions:

• The µ-Blood platform provides a novel in vitro model for studying blood-borne infections like babesiosis.
• It maintains the integrity of the whole blood microenvironment for more accurate research.
• This system offers advantages for understanding infection dynamics and developing new diagnostic or therapeutic strategies.