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  2. Signs and symptoms - Wikipedia

    en.wikipedia.org/wiki/Signs_and_symptoms

    Symptomatology (also called semiology) is a branch of medicine dealing with the signs and symptoms of a disease. [ 54 ] [ 55 ] [ 56 ] This study also includes the indications of a disease . [ 57 ] It was first described as semiotics by Henry Stubbe in 1670 a term now used for the study of sign communication .

  3. Disease - Wikipedia

    en.wikipedia.org/wiki/Disease

    A secondary disease is a disease that is a sequela or complication of a prior, causal disease, which is referred to as the primary disease or simply the underlying cause . For example, a bacterial infection can be primary, wherein a healthy person is exposed to bacteria and becomes infected, or it can be secondary to a primary cause, that ...

  4. 7 signs your bad breath may signal a more serious health problem

    www.aol.com/bad-breath-sign-serious-illness...

    Dry mouth (also called xerostomia) can be caused by dehydration, says Hoss, which reduces saliva production. Drinking enough water is a key part of maintaining oral health and preventing bad breath.

  5. Influenza - Wikipedia

    en.wikipedia.org/wiki/Influenza

    [12] [23] Influenza D virus causes an influenza-like illness in pigs but its impact in its natural reservoir, cattle, is relatively unknown. It may cause respiratory disease resembling human influenza on its own, or it may be part of a bovine respiratory disease (BRD) complex with other pathogens during co-infection. BRD is a concern for the ...

  6. Infection - Wikipedia

    en.wikipedia.org/wiki/Infection

    An infectious disease, also known as a transmissible disease or communicable disease, is an illness resulting from an infection. Infections can be caused by a wide range of pathogens , most prominently bacteria and viruses . [ 2 ]

  7. Systemic disease - Wikipedia

    en.wikipedia.org/wiki/Systemic_disease

    Signs of a systemic disease may be evident on the outer surface of the eye (eyelids, conjunctiva and cornea), middle of the eye and at the back of the eye (retina)." [ 4 ] Since 500 B.C. , some researchers have believed that the physical condition of the fingernails and toenails can indicate various systemic diseases.

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