Patients Describe Alarming Test Results

SAN JOSE, Calif.—Jurors heard testimony this week from voices that have been scant in Elizabeth Holmes’s criminal-fraud trial so far: patients who took Theranos Inc. tests, as well as Ms. Holmes herself.

The patient testimony from two Arizonans who received troubling test results addresses a crucial element of the government’s case against Ms. Holmes, backing several wire-fraud counts and one conspiracy count that charge her with misleading patients about the capabilities of Theranos’s blood-testing technology.