Isifiso

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Ukuskenwa kwe-electron micrograph yesifo sephepha i- Mycobacterium, i-bacteria edala isifo sephepha.

Isifo yimpilo engamanga kakuhle,  ubuhesheheshe ngokwemo nangokokusebenza kwempilo yomntu, okuthi kuchaphazele ilungu layo yonke i- organism. Isifundo ngesizekabani sesifo sibizwa ngokuba yi-pathology. Disease is often construed as a medical condition associated with specific symptoms and signs.[1] It may be caused by factors originally from an external source, such as infectious disease, or it may be caused by internal dysfunctions, such as autoimmune diseases. In humans, "disease" is often used more broadly to refer to any condition that causes pain, dysfunction, distress, social problems, or death to the person afflicted, or similar problems for those in contact with the person. In this broader sense, it sometimes includes injuries, disabilities, disorders, syndromes, infections, isolated symptoms, deviant behaviors, and atypical variations of structure and function, while in other contexts and for other purposes these may be considered distinguishable categories. Diseases usually affect people not only physically, but also emotionally, as contracting and living with a disease can alter one's perspective on life, and one's personality.

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