InfectiousCont

InfectiousCont - How Do You Catch An Infection? Animals...

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Unformatted text preview: How Do You Catch An Infection? Animals Animals Insects Insects People People Water Water Food Food Infectious Diseases Considerations for the 21 st Century Viruses, bacteria, fungi, protozoa, helminths Infectious diseases are the second leading cause of death world-wide A virus takes over a body cells reproductive ability & instructs it to produce new viral particles which are released to enter other cells. Infectious Diseases Considerations for the 21 st Century 3 greatest microbial killers worldwide: HIV, malaria, tuberculosis Protozoa-single cell organism Example-Giardia protozoan most common in U.S. Immune Response Antigen-a substance that white blood cells recognize as foreign. Antibodies-proteins that bind to antigens & mark them for destruction by other white blood cells. AIDS/HIV In 2000, 36 million people worldwide living with HIV Worldwide 3 million die of AIDS each year 30% of new HIV infections occur in women Next epicenters predicted India and southern and south east Asia Facts Relating To The Common Cold There are 200 distinct cold viruses. Americans come down with 1 billion colds annually. The common cold results in ~20 million lost work days and 22 million days of absence from school. Spring, Summer and Early Fall Colds Rhinoviruses causing symptoms above the neck (stuffy nose, headache, runny nose) Winter Colds Adenoviruses, parainfluenza viruses, coronaviruses, influenza viruses which are more likely to get into the bronchi and trachea and cause more fever and bronchitis. Bacteria Bacteria are microscopic, unicellular organism with a simple cell structure....
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InfectiousCont - How Do You Catch An Infection? Animals...

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