Vectorborne and zoonotic diseases

Vectorborne and zoonotic diseases - Vectorborne and...

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Vectorborne and zoonotic diseases (VBZD) are infectious diseases whose transmission cycles involve animal hosts or vectors. -Vectorborne diseases are those in which organisms, typically blood feeding arthropods such as insects, ticks or mites, carry the pathogen from one host to another, generally with amplification, increased virulence, in the vector (for ex. Malaria). change slide -Zoonotic diseases are those that can be transmitted from animals to humans either by contact with animals or by vectors that can carry zoonotic pathogens from animals to humans (avian flu for ex.) change slide (go to slide 4) -epidemiology of Vectorbrone zoonitic diseases in the united states has changed significantly over the past century, and many diseases that previously caused significant illness and death, including malaria, dengue, yellow fever and murine typhus are now rarely seen in the country. This is due to vaccination against disease, tools to detect and treat cases, improvements in sanitation. change slide (go to slide 5) -vectorborne diseases that are currently prevalent in the US include Lyme disease and ehrlichiosis, both of which are transmitted by ticks. change slide (go to slide 6)
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-zoonoses that are currently prevalent in the US, some of which are also vectorborne, include rabies, Q fever, anthrax, pathogenic E. coli, tularemia, hantavirus pulmonary syndrome, and plague. change slide (7) -our population is directly susceptible to the VBZD that circulate in warmer climates. We are vulnerable as a result of trade and travel. The United states remains the worlds largest importer of wildlife, both legal and illegal; these animals represent a potential source of zoonotic pathogen introduction into US communities. (259) large disruptions and subsequent movement of human populations create conditions for wider distributions of pathogens and greater exposure to vector species (268). change slide (8) -many vectorbrone diseases that have been virtually eliminated from the industrialized world are still prevalent in developing countries. -globally, VBZD cause significant morbidity and mortality: in 2006, there were 247 million cases of malaria and 881,000 malaria related deaths worldwide. change slide (9) -climate change may provide opportunities for the resurgence of certain VBZD in the united States, which has already seen some redistribution of vector species. (255) -a severe degredation of rural and urban climate and sanitation conditions could bring malaria, epedemic typhus, plague and
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This note was uploaded on 02/09/2012 for the course MUSI 109 taught by Professor Chan during the Spring '10 term at Miramar College.

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Vectorborne and zoonotic diseases - Vectorborne and...

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