Severe cavitary pneumonia caused by a non-equi Rhodococcus species in an immunocompetent patient.

Rhodococcus equi is a Gram-positive coccobacillus that can cause a variety of infections in humans, most commonly severe pneumonia.1-4 These infections typically occur in immunocompromised hosts, although, rarely, immunocompetent hosts may be affected as well.1-4 Nonequi Rhodococcus species have been implicated in human disease, albeit less commonly than R equi. We report a case of severe cavitary pneumonia in an immunocompetent host caused by a non-equi Rhodococcus species.