How would you approach the management of posterior uveitis caused by Toxoplasma gondii in immunocompromised patients, considering the potential for atypical presentations and treatment resistance?  

There are no established studies to confirm the best medications and duration for the treatment of toxoplasmosis retinitis. The recommendations are based on experience and consensus. Further, I am not sure how you established resistance since one rarely has the organism to test, and there is no rout...