His areas of clinical practice include HIV medicine, sexually transmitted diseases (STDs), hospital acquired infections and tropical medicine. Dr. Castro’s research interests include HIV drug resistance, barrier methods to prevent HIV transmission, vaccines, HIV associated peripheral neuropathy, barriers to access to care for HIV and/or STD clinical services, prevention/treatment of HPV infections, and fungal infections in HIV infected individuals. Dr. Castro was the Principal Investigator on a mixed methods pilot study entitled “ Attitudes about Circumcision”, funded by El Centro in Year 2. The study enrolled 121 Hispanic men and women who were expecting a baby to assess attitudes and beliefs surrounding male circumcision.