Infectious Diseases –Considerations for the 21stCenturyViruses, bacteria, fungi, protozoa, helminthsInfectious diseases are the second leading cause of death world-wideA virus takes over a body cell’s reproductive ability & instructs it to produce new viral particles which are released to enter other cells.
Infectious Diseases –Considerations for the 21stCentury3 greatest microbial killers worldwide:HIV, malaria, tuberculosisProtozoa-single cell organismExample-Giardia protozoan most common in U.S. Immune ResponseAntigen-a substance that white blood cells recognize as foreign. Antibodies-proteins that bind to antigens & mark them for destruction by other white blood cells.
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