Grant Gerstner

A 52-year-old male presents to your South Texas ED for his second visit this week complaining of indolent fever, shortness of breath, pleuritic chest pain, and a rash on his trunk and extremities.  He was diagnosed with a viral syndrome three days ago but his symptoms have worsened despite supportive treatments.  Upon further questioning, he reports adopting a stray cat one week ago.  He is tachycardic and tachypneic with diffuse crackles and rhonchi. His skin exam is notable for a diffuse maculopapular rash covering his trunk and proximal extremities.  What is the likely diagnosis?