Pulmonologists specialize in treatment of diseases and other conditions of the lungs. This is subspecialty of internal medicine, and it is necessary that one becomes an internist first before being a pulmonologist (What as a Pulmonologist, 2000).
An infectious disease specialist is an internist or podiatrist concerned with the treatment of infectious diseases, especially of "sinuses, heart, brain, lungs, urinary tract, bowel, bones and pelvic organs." Usually, they work in conjunction with other specialists to diagnose and treat more effectively such diseases (Infectious Disease, n.d.).
An allergist is a specialist treating allergies. Allergies are the body's defense mechanism against foreign objects such as dust or other particles. However good is the purpose of allergies, they are very uncomfortable for the person having them. Essentially, allergists are there to give a person some kind of relief (Finegold, 2001).
Podiatrists are specialists on foot care. There are many diseases and discomforts involving the feet, and even injuries of the feet may cause complications. Therefore, these make the podiatrist important in many ways (Podiatrists, 2007).
Proctologists are medical specialists on the diseases of the colon, rectum, and anus. ...