Chapter 5 Diseases_Organisms_45_Slides_GrayScale_Fall_08_2

Chapter 5 Diseases_Organisms_45_Slides_GrayScale_Fall_08_2...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
HP 320 Chapter 5 Disease and Disease-Producing Organisms Disease Any disruption in the structure and/or function of a part, organ or system in the human body Causes may be known or unknown Symptoms may be objective or subjective Severity may be variable Classification of Diseases By Organ or organ system – e.g. heart disease, kidney disease, respiratory infection Causative agent – biological, chemical , and physical agents Type: acute vs. chronic vs. sub-acute diseases By Type of Disease Acute Diseases : Rapid onset, short duration, relatively severe Communicable • common cold, pneumonia, measles, typhoid fever Noncommunicable • appendicitis, poisoning, fire, gunshots Subacute Diseases : Neither severe nor very long-lasting Chronic Diseases: Less sever but continuous or recurring for long periods Communicable • AIDS, TB, syphilis Noncommunicable • diabetes, coronary heart disease, arthritis, cirrhosis Causative Agents of Disease Biological Agents Chemical Agents Physical Agents -Viruses (Herpes, AIDS) -Pesticides -Heat -Bacteria (Salomnellosis ) -Food additives -UV Light -Fungi (Athlete s foot) -Drugs -Radiation -Protozoa (Malaria) -Industrial chemicals -Noise vibration -Nematodes (worms) (Ascaris, elephantiasis) -Air pollutants -Cigarette smoke -Car accidents Categories of Disease Infectious diseases: e.g. colds, AIDS, TB Degenerative diseases: e.g. osteoporosis, arthritis Nutritional disorders: e.g. rickets, nutritional anemias Metabolic disorders: e.g. diabetes Immune disorders: e.g. allergies – autoimmune disorders: e.g. rheumatoid arthritis, multiple sclerosis (MS) Psychiatric/mental disorders Neoplasms/cancers
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Predisposing Causes/Risk Factors Modifiable • Risky behaviors • Living conditions (e.g. crowded housing, poor sanitation) asbestos, pesticides, ionizing radiation….etc.) Nonmodifiable • Age; gender; heredity; pre-existing illness Modifiable Risk Factors 1/3 of world's cancers are due to 9 modifiable risk factors 1. Tobacco use (accounts for 21% of all cancer) 2. Alcohol consumption 3. 4. 5. Physical inactivity 6. Unsafe sexual behavior 7. Urban air pollution 8. Indoor smoke from household use of coal 9. Contaminated injection needles Source: Ezzati et al. 2005 Disease Terminology • Etiology : cause of a disease • Idiopathic : a disease of unknown etiology • Prognosis : prediction of probable outcome of disease • Therapy : course of treatment • Nosocomial : hospital acquired • Iatrogenic : due to adverse effects of treatment Diagnostic Terms • Diagnosis : a conclusion as to the nature of the illness • Prognosis : a prediction of the probable outcome of a disease • Symptoms : subjective manifestations of a disease • Signs : objective manifestations of a disease
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 10/07/2008 for the course HP 320 taught by Professor Islam during the Fall '08 term at USC.

Page1 / 8

Chapter 5 Diseases_Organisms_45_Slides_GrayScale_Fall_08_2...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online