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Related Concept Videos

Classification of Illness01:17

Classification of Illness

The meaning of illness is individualized to each person who experiences an alteration in health. In contrast, disease is a medical term indicating a pathological change in the structure and function of the body or mind. It is a condition that has specific symptoms and boundaries.
An illness is a response to a disease in which the person's level of functioning is changed compared with a previous level. The general classification of illness includes acute and chronic.
Acute illness is severe and...
Levels of Health Promotion and Illness Prevention01:26

Levels of Health Promotion and Illness Prevention

Health promotion allows a person to control the determinants of health, resulting in an improved health status. It enhances the quality of life and reduces premature deaths. Health promotion and illness prevention programs help people make beneficial choices to reduce the risk of disease and disabilities. There are three health promotion and illness prevention levels: primary, secondary, and tertiary prevention.
In primary prevention, actions taken before disease onset prevent the disease from...
Heart Failure IV: Classification and Diagnostic Evaluation01:30

Heart Failure IV: Classification and Diagnostic Evaluation

Heart failure can be classified in various ways, with the most common classifications based on physical activity limitations, disease progression, severity, and treatment strategies.The Functional Classification of Heart Failure divides patients into four categories based on physical activity limitation due to symptom burden.Class I: Patients in this class have cardiac disease but no physical activity limitations. Ordinary activities like walking, climbing stairs, or routine tasks do not cause...
Diagnostic and Statistical Manual of Mental Disorders (DSM)01:27

Diagnostic and Statistical Manual of Mental Disorders (DSM)

The Diagnostic and Statistical Manual of Mental Disorders (DSM) serves as the primary classification system for mental health disorders, providing standardized diagnostic criteria for clinicians and researchers. First published by the American Psychiatric Association (APA) in 1952, the DSM has undergone several revisions to reflect evolving psychiatric understanding. The fifth edition, DSM-5, released in 2013, introduced key updates that expanded diagnostic categories and modified diagnostic...
Drug Classes and Categories01:25

Drug Classes and Categories

Drugs can be classified according to their chemical composition or their intended therapeutic application. For instance, anti-infective agents that possess the ability to eliminate pathogens or suppress their growth and reproduction can be grouped based on the organisms they target or their chemical structure. Furthermore, drugs can be divided into prescription, nonprescription, or controlled substances. Prescription medications, such as antibiotics, require oversight from a licensed healthcare...
Models of Health Promotion and Illness Prevention II01:18

Models of Health Promotion and Illness Prevention II

The person's health status fluctuates continually, varying from being in good health to becoming ill and returning to being healthy. To understand the concept of illness prevention, there are two models. First, the health-illness continuum model is a graphic representation of an individual's wellness. It states that a person is considered healthy in the absence of physical disease and the presence of good emotional health.
The agent-host-environment model states that disease results from...

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Related Experiment Video

Updated: Jun 5, 2026

Assessment of Dependence in Activities of Daily Living Among Older Patients in an Acute Care Unit
06:52

Assessment of Dependence in Activities of Daily Living Among Older Patients in an Acute Care Unit

Published on: September 30, 2020

Decline as a disease category: is it helpful?

M E Ostry, R C Venette, J Juzwik

    Phytopathology
    |December 22, 2010
    PubMed
    Summary

    Forest pathologists should abandon the term "decline" for tree diseases. This label obscures complex disease factors, hindering effective forest management and clear communication about tree health.

    Area of Science:

    • Forest Pathology
    • Plant Disease Epidemiology
    • Ecology

    Background:

    • The term "decline" is inconsistently applied to forest tree diseases of complex etiology.
    • This classification creates arbitrary distinctions from abiotic or biotic diseases, causing confusion.
    • Current usage offers no practical insights for forest managers regarding disease origins or control.

    Discussion:

    • All tree diseases, regardless of complexity, can be understood within the disease triangle framework (pathogen, host, environment).
    • The term "decline" fails to capture essential information about specific damaging agents, environmental conditions, and host susceptibility.
    • This lack of specificity impedes understanding and managing forest disease situations effectively.

    Key Insights:

    • The term "decline" is an arbitrary and unhelpful label for complex forest tree diseases.

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  • Forest pathologists should discontinue using "decline" as a distinct disease category.
  • Effective disease management requires understanding specific etiological agents and environmental factors.

    • Outlook:

    • Propose a standardized nomenclature for new diseases based on host, symptom, and major determinant.
    • Clearer communication regarding complex forest diseases is essential for developing effective management strategies.
    • Adopting a more precise terminology will improve research, diagnostics, and practical forest management.