In this essay we will discuss about: Meaning of Immunology 2. History of Immunology 3. Essay on the Meaning of Immunology:
A disease is a condition that impairs the proper functioning of the body or of one of its part. Every living thing, both plants and animals, can succumb to disease. People, for example, are often infected by bacteria, but bacteria, in turn, can be infected by viruses.
Hundreds of different diseases exist. Each has its own particular set of symptoms and signs, clues that enable a physician to diagnose the problem. A symptom is something a patient can detect, such as fever, bleeding or pain.
A sign is something a doctor can detect, such as a swollen blood vessel or an enlarged internal body organ. Every disease has a cause, although the causes of some remain to be discovered. Every disease also displays a cycle of onset, or beginning, course, or time span of affliction, and end, when it disappears or it partially disables or kills its victim.
An epidemic disease is one that strikes many persons in a community. When it strikes the same region year after year it is an endemic disease. An acute disease has a quick onset and runs a short course.
For example an acute heart attacks. A chronic disease has slow onset and runs sometimes for year. The gradual onset and long course of TB makes it a chronic ailment. On the basis of their occurrence diseases are of two types: These diseases occur due to gene or chromosomal mutations, e.
Colour blindness, thalassemia etc. Detailed study is given in human genetics chapter. Acquired diseases which are caused by pathogens from infected persons to healthy one are infectious diseases. Communicable diseases Infectious are those that can be passed among persons such as by means of airborne droplets from a cough or sneeze.
Tiny organisms such as bacteria and fungi can produce infectious diseases. So can tiny worms. Whatever the causative agent might be, it survives in the person it infects and is passed on to another or its eggs are passed on. Sometimes, a disease-producing organism gets into a person who shows no symptoms of the disease.
The symptomatic carrier can then pass the disease on to someone else without even knowing he has it. Non-communicable diseases Non-infectious are caused by malfunctions of the body. These include organ or tissue degeneration, erratic cell growth, and faulty blood formation and flow.
Also included are disturbances of the stomach and intestine, the endocrine system, and the urinary and reproductive systems. Advances in medical science make it possible to prevent and treat many diseases that once caused death.- Disease and Pathology Lyme disease, or lyme borreliosis, is an emerging infectious disease transmitted by ticks.
Lyme disease is considered an emerging infectious disease because it’s incidence has increased over the past 20 years, and it was not identified until in the United States (CITE). Essay on the Meaning of Immunology: In the process of evolution, the body of organisms has developed the property of distinguishing “self” and “nonself”, the “self” is .
INHERITED DISEASE:HuntingtonÃ Â s disease is an inherited disease witch affects the neurological components in the brain. It is a mutation in the production of htt protein and produces the ineffective mHtt protein instead as the codonÃ Â s have mutated and form excessively long chains than is required.
Infectious diseases are increasingly being implicated in the pathogenesis of many important diseases that were previously thought to have a non-infectious origin. Cervical cancer is now known to be associated with human papillomavirus infection. Short Essay on Human Diseases! A disease is a condition that impairs the proper functioning of the body or of one of its part.
Every living thing, both plants and animals, can succumb to disease. Biology Assesment- Infectious and Non Infectious Diseases Essay Hewlett-Packard Company Biology Assessment task- 3 Infectious and Non Infectious disease By Carla Westwood Question One- Part A Malaria is a mosquito-borne disease that causes over million deaths per year according to estimates by the World Health Organization.