San Diego-based Quidel (NASDAQ: QDEL) today cut 31 employees, or approximately 10 percent of its workforce, as part of a corporate restructuring that includes cost-cutting measures. Quidel is a developer of rapid diagnostic tests of infectious and reproductive health. The company launched its first products, dipstick-based pregnancy tests, in 1984. In a statement released this morning, Quidel says the cuts include two senior level positions. In an earnings warning issued two weeks ago, Quidel said the mild flu season had weakened demand for its tests.