Spero Therapeutics, Inc. (SPRO) came out with a quarterly loss of $0.32 per share versus the Zacks Consensus Estimate of a loss of $0.27. This compares to earnings of $0.02 per share a year ago. These figures are adjusted for non-recurring items.This quarterly report represents an earnings surprise of -18.52%. A quarter ago, it was expected that this company would post a loss of $0.35 per share when it actually produced a loss of $0.33, delivering a surprise of 5.71%.Over the last four quarters, the company ...