Which type of microscope is used to examine a urine sample for the presence of Leptospira?

Explanation

Leptospira are thin, motile spirochetes that are best visualized using a dark-field microscope, which enhances contrast by illuminating the specimen against a dark background. Scanning and inverted microscopes are not suitable for detecting these organisms, and electron microscopes, while highly detailed, are not typically used for routine screening of urine samples.