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Relatedly, when disease is widespread, epidemiological studies investigate what associated factors, such as location, sex, exposure to chemicals, and many others, make a population more or less likely to have an illness, condition, or disease, thus helping determine its etiology. Sometimes determining etiology is an imprecise process.
Also called silent disease, silent stage, or asymptomatic disease. This is a stage in some diseases before the symptoms are first noted. [23] Terminal phase If a person will die soon from a disease, regardless of whether that disease typically causes death, then the stage between the earlier disease process and active dying is the terminal phase.
In pathology, pathogenesis is the process by which a disease or disorder develops. It can include factors which contribute not only to the onset of the disease or disorder, but also to its progression and maintenance. [1] The word comes from Ancient Greek πάθος (pathos) 'suffering, disease' and γένεσις (genesis) 'creation'.
An infection is the invasion of tissues by pathogens, their multiplication, and the reaction of host tissues to the infectious agent and the toxins they produce. [1] An infectious disease, also known as a transmissible disease or communicable disease, is an illness resulting from an infection.
Medieval European doctors generally held the view that disease was related to the air and adopted a miasmatic approach to disease etiology. [ 7 ] Etiological discovery in medicine has a history in Robert Koch 's demonstration that species of the pathogenic bacteria Mycobacterium tuberculosis causes the disease tuberculosis ; Bacillus anthracis ...
A representation by Robert Seymour of the cholera epidemic depicts the spread of the disease in the form of poisonous air.. The miasma theory was the predominant theory of disease transmission before the germ theory took hold towards the end of the 19th century; it is no longer accepted as a correct explanation for disease by the scientific community.
Many people think it could be a coronavirus—like SARS-CoV-2, the virus that causes illness with Covid-19—or a new strain of influenza, Dr Russo said. “But it could be brand new,” he added.
Pathophysiology (or physiopathology) is a branch of study, at the intersection of pathology and physiology, concerning disordered physiological processes that cause, result from, or are otherwise associated with a disease or injury.