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1
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Caused by external environment usually other humans
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3
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When bacteria grow on body sites exposed to the environment, without causing infection.
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4
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The presence of microorganisms causing damage to body tissues, usually in the presence of acute inflammation (pain, swelling, redness, heat and loss of function)
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5
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Are bacteria which are found in or on our bodies on a semi-permanent basis without causing disease
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6
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An infection that originates in and is confined to one area of the body or organ system e.g. ear infection, boil on the leg
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7
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Means microbes are present
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8
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One benefits, the other (host) is (potentially) harmed e.g. virus
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12
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One benefits without causing harm to the other.
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13
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An infection caused by an infectious agent that is already present in the body, but has previously been unapparent or dormant i.e. normal flora on skin infecting wounds
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2
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An infectious microorganism that is normally a commensal or does not harm its host but can cause disease when the host's resistance is low
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9
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An infection that appears suddenly and usually followed by a rapid recovery e.g. measles, mumps, influenza
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10
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An infection that affects the entire body e.g. Influenza, Meningitis
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11
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Any prolonged or persistent invasion of the body by pathogens e.g. Tuberculosis, leprosy, syphilis
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14
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Living together of two dissimilar organisms
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