Complex sentence: As a result of successful outcomes due to his herbal treatment of those suffering from ill health, Córdoba had established himself as a "vegetalista" in Iquitos--a good reputation he continued to earn in the region, and so became a popular healer.
Split into simpler sentences: As a result of successful outcomes due to his herbal treatment of those suffering from ill health, Córdoba had established himself as a "vegetalista" in Iquitos. A good reputation he continued to earn in the region, and so became a popular healer.