Infectious disease: Difference between revisions
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imported>Howard C. Berkowitz (New page: {{subpages}} An ''infectious disease'' is caused by a pathogenic living organism. While all contagious diseases are infectious, not all infectious diseases are contagious ...) |
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Revision as of 21:46, 30 May 2008
An infectious disease is caused by a pathogenic living organism. While all contagious diseases are infectious, not all infectious diseases are contagious from a host of one species to a host of another.
Contagion may need to occur through an intermediate vector (biological): unless there is direct blood-to-blood contact, for example, malaria is not contagious between humans. Malaria is transmitted when a mosquito bites an infected host, and, in biting an uninfected host, transfers infected blood.