PPT-IMMUNITY IMMUNITY INTRODUCTION

The term Immunity has traditionally referred to the resistance exhibited by the host towards injury caused by microorganism and their product However protection against infectious disease is only one of many consequences of immune response which in its entirety is concerned with the reaction of the body against any foreign antigen. For High-level public officials. Public Accountability Mechanisms (PAM) Initiative. By Stephanie E. Trapnell and . Ayompe. . Ayompe. June 12, 2013. THE WORLD BANK. 1. Outline. 2. Public Accountability Mechanisms. . Ch.16. What is Immunity?. Immunity is resistance to infection after a foreign antigen has penetrated the first line of defense,. Immunity is achieved naturally, by having the disease or the artificial immunization. . Chapter 22. Functions of the Immune System. Destroy pathogens (organisms that cause disease). Detect and kill abnormal cells such as cancerous cells. Remove dead cells and debris from the body. Pathogens. Adaptive (specific) Immunity. The general idea:. body . can recognize . specific. . invader and act to destroy . that specific invader.. Adaptive . immunity develops during an individual. ’. s lifetime.. Present before exposure to pathogens. Present at birth. Non-antigen specific. Consists of:. Skin… barrier for microbes and viruses. Compromised by abrasion or laceration. Sebacious. sweat is acidic (pH 3-5)… prevents colonization of bacteria. Oral immunity and . immunopathological. processes in the mouth.  Immunity. Microorganisms are in the air we breathe and in/on the food we eat;. Thus our epithelial surfaces are continuously exposed to microorganisms;. Reaves. KEY CONCEPT:. The immune systems consists of organs, cells, and molecules that fight infections. Many other tissues and systems help the immune system. Skin. is a physical barrier to infection. Adaptive (specific) Immunity. The general idea:. body . can recognize . specific. . invader and act to destroy . that specific invader.. Adaptive . immunity develops during an individual. ’. s lifetime.. HCS 2100. SLO: 1.0 – 1.4. Immunity is defined as:. The final line of defense against disease. An individual’s power to resist or overcome the effects of a particular disease agent or its harmful products. disease. Disease-any condition that impairs the normal functioning of the body. Violation of homeostasis. Homeostasis-ability of the body to keep proper internal conditions no matter what is happening outside of it. Learning objectives. By the end of this session student will be able to. . Define innate immunity, acquired immunity. . To understand cells involved in . innate . and acquired . immunity. IMMUNITY. of certain substances in . the blood and lymph stream. . These . substances are known as antibodies. . This immunity is inborn. . . Antigens. , the foreign substances that attack the body, stimulate the production of antibodies. . The resistance that an individual acquires during life by recognising and selectively eliminating specific foreign molecules is known as acquired immunity.. This is displays four characteristic features:. Features of adaptive immunity:. Adaptive immunity is characterized by the following:. 1. Antigenic specificity: (. highly specific).. 2. Diversity : . ( each antigen there is specific T-cell and B-cell for it)..