An Improved PCR Protocol For Detection of Babesia duncanI In Wildlife and Vector Samples

Area of Science:

• Veterinary Entomology
• Parasitology
• Molecular Diagnostics

Background:

• Human babesiosis is an emerging tick-borne disease in North America.
• Babesia duncani causes infections in the Western US, but its transmission cycle is unknown.
• Lack of sensitive molecular tools hinders identification of Babesia duncani vectors and reservoirs.

Purpose of the Study:

• Develop a sensitive and specific molecular diagnostic assay for Babesia duncani.
• Facilitate research into the transmission ecology of Babesia duncani.

Main Methods:

• A nested PCR assay targeting the beta-tubulin gene of Babesia was designed.
• The assay was validated using spiked tick and mammalian DNA with Babesia duncani and related species.
• Sensitivity was assessed using known DNA quantities and visualized via gel electrophoresis.

Main Results:

• The nested PCR assay demonstrated high specificity and sensitivity, detecting approximately 1 copy of template DNA.
• Babesia duncani was detectable in larval tick samples.
• The assay allowed for visual differentiation between Babesia species.

Conclusions:

• A novel nested PCR assay provides a sensitive tool for detecting Babesia duncani.
• This assay will aid in identifying tick vectors and animal reservoirs, crucial for understanding disease transmission.
• Further research can now investigate the ecological factors driving Babesia duncani infections.