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Diseases are particular abnormal conditions, a disorder of a structure or function, that affects part or all of an organism. Disease is often construed as a medical condition associated with specific symptoms and signs. 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. 

If left untreated, a disease could wreak havoc on a being. Depending on the type and severity, diseases could bring about unconsciousness, the loss of a limb, or death. Death due to disease is called death by natural causes.

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Classifications ==


There are four main types of disease: pathogenic disease, deficiency disease, hereditary disease, and physiological disease. Diseases can also be classified as communicable and non-communicable. 

Mental illness is a broad, generic label for a category of illnesses that may include affective or emotional instability, behavioral disregulation, and/or cognitive dysfunction or impairment.

An organic disease is one caused by a physical or physiological change to some tissue or organ of the body.

An acute disease is a short-lived disease

A chronic disease is one that lasts for a long time, usually at least six months. 

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Types of causes ==


Airborne - An airborne disease is any disease that is caused by pathogens and transmitted through the air. Infectious Infectious diseases, also known as transmissible diseases or communicable diseases, comprise clinically evident illness (i.e., characteristic medical signs and/or symptoms of disease) resulting from the infection, presence and growth of pathogenic biological agents in an individual host organism. Included in this category are: Contagious – an infection, such asinfluenza or the common cold, that commonly spreads from one person to another Communicable – an infection that can spread from one person to another, but is not usually spread through everyday contact, such as the viral hepatitis.

Non-communicable A non-communicable disease is a medical condition or disease that is non-transmissible. Non-communicable diseases cannot be spread directly from one person to another. Heart disease and cancers are examples of non-communicable diseases in humans.


Foodborne Foodborne illness or food poisoning is any illness resulting from the consumption of food contaminated with pathogenic bacteria, toxins, viruses, prions or parasites.


Lifestyle A lifestyle disease is any disease that appears to increase in frequency as countries become more industrialized and people live longer, especially if the risk factors include behavioral choices like a sedentary lifestyle or a diet high in unhealthful foods such as refined carbohydrates, trans fats, or alcoholic beverages.


Notes Those that affect regenerative beings Potent exotoxins (work faster than regen) Type 1- stimulating massive fluid loss faster than body can replenish Mostly type 3- interfere with protein synthesis or overactivate enzymes=fluid loss

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Common diseases ==


Respiratory Common cold (viral) Influenza (viral) Pneumonia Diphtheria Ear infections Strep throat Tonsillitis Legionnaire's disease Pertussis (Whooping Cough) Tuberculosis

Skin infections Acne Boil Carbuncle Folliculities Scalded skin syndrome Impetigo Varicella/Chickenpox (viral) Shingles (viral) Measles (viral) Rubella (viral) Warts (viral) Candidiasis (weak immune-fungal) Ringworm (fungal) Diaper rash/Jock itch (fungal) Athlete's foot (fungal) Nail fungus Leprosy Wound Infections Flesh-eating disease Tetanus/Lockjaw (nervous)

Digestive Tooth Decay Gingivitis/Periodontitis Gastritis Stomach ulcers Food poisoning Cholera Shigellosis/Traveler's diarrhea Gastroenteritis Stomach flu (viral)

Neural Meningitis Botulism Poliomyelitis Rabies

STD Gonorrhea AIDS (viral) Herpes (viral) Syphilis Chlamydia Gential warts (viral) Hepatitis B trichomoniasis Pubic lice (crabs) Scabies (mite)

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