Question: A patient under chemotherapeutic treatment for leukemia is admitted for pneumonia for which treatment with cefepime has been prescribed. A thorax Rx / CT scan shows an infiltrate with the sign of the halo and meniscus lunate. The lesion is peripheral and a transthoracic puncture is indicated for sampling. Until you have definitive histological and microbiological results, what antimicrobial would you add to the treatment? 
 Options:  <1> Ganciclovir <2> Caspofungin <3> Fluconazole <4> Piperacillin-tazobactam <5> Voriconazole
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