<prompt> In HIV positive patient with pneumocystis jiroveci infection, which of the following is used for prevention?AzithromycinAcyclovirC. LevofloxacinSulfomethoxazole trimethoprim  <response>: Ans. d Sulfomethoxazole and trimethoprimRef: Harrison 19th ed. 492 Prophylaxis with trimethoprim-sulfamethoxazole TMPSMZ prevents many opportunistic infections, including infection with P. carinii, Toxoplasma gondii, and community-acquired respiratory, gastrointestinal, and urinary tract pathogens. Intolerance of TMP-SMZ is common; desensitization is useful less often in transplant patients than in patients with AIDS. Alternative agents provide a narrower spectrum of protection than does TMP-SMZ and less adequate protection against Pneumocystis species 