A urine culture plated to sheep blood agar was noted to be “…

A urine culture plated to sheep blood agar was noted to be “swarming”.  No growth on CNA.  On MacConkey, there were >100,000 CFU/mL of a non-lactose fermenter.  TSI was reported as K/A + H2S. The organism was urea positive and indole negative.  The organism is most likely: