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Transmission and Pathogenesis 2025

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Chapter 2 discusses the transmission and pathogenesis of tuberculosis (TB), an airborne disease caused by Mycobacterium tuberculosis. It outlines how TB is spread through inhalation of droplet nuclei, factors influencing transmission, and the progression from latent TB infection (LTBI) to active TB disease. The chapter also covers drug-resistant TB, including multidrug-resistant (MDR) and extensively drug-resistant (XDR) forms, and presents a classification system for TB based on its pathogenesis. Key objectives include understanding TB transmission, risk factors for progression to disease, and the implications of drug resistance.

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Is pathogenesis and etiopathogenesis same?

The terms etiology and pathogenesis are closely related to the questions of why and how a certain disease or disorder develops. Models of etiology and pathogenesis therefore try to account for the processes that initiate (etiology) and maintain (pathogenesis) a certain disorder or disease.

Whats the difference between pathogenesis and pathophysiology?

Overall, pathogenesis is the process to determine how an individual became ill. This is in contrast to pathophysiology, which studies the effects of a disease, illness, or injury.

What are the 4 stages of pathogenesis?

Pathogenesis is the process by which an infection leads to disease. Pathogenic mechanisms of viral disease include (1) implantation of virus at the portal of entry, (2) local replication, (3) spread to target organs (disease sites), and (4) spread to sites of shedding of virus into the environment.

What is the difference between pathogenesis and non pathogenesis?

The Pathogenic bacteria is a biological agent that causes disease to the host. They are often referred to as Infectious agents, so they have a capability to invade inside the host cells. Non- pathogenic bacteria inhabit the gut environment. These microbes are referred to as gut flora, they live outside the body cells.

What is this pathogenesis?

Pathogenesis encompasses all the sequence of events accompanying acute and persistent infections. It includes entry of the virus into the body, multiplication and spread, the development of tissue damage, and the production of an immune response; the latter may contribute to the pathology of an infection.

What is the difference between pathogenesis and pathogenesis?

Pathogenesis refers to the manner of development of a disease or a condition. Pathophysiology refers to the disordered physiological process(es) associated with a disease or a condition.

What is the difference between pathogenicity and pathogenesis?

Pathogenicity describes the potential of a virus to cause disease. Pathogenesis is the process by which the virus causes disease.

Transmission and Pathogenesis 2025

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