Ecología de las enfermedades virales del hombre transmitidas por artrópodos
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The author presents several new concepts concerning the ecology of some common arthropod-borne viruses which produce disease in man. The study takes in the ecology of the small mammals and birds which form the source of the viruses in nature and the ecology of the viruses within the small mammal hostField and laboratory studies of Western equine, St. Louis, Colorado tick fever, Rio Bravo and a newly discovered group B virus have led the author to propose that the marginal area between grassland and hill forest of the high plateau regions is the most likely source of most of the arthropod-borne viruses. The flooding of the lower natural, or agriculturally developed, grassland during periods of unusually high rainfall, or by irrigation, serves to produce the abundance of mosquitos necessary to disperse certain of these viruses from a reservoir host to infect aberrant hosts such as birds, which in turn produce more virus and move it to previously noninfected regionsIt is postulated that the virus infections as they occur in the natural host or system of hosts will not be recognized by man because the virus will not produce epidemics of disease and death in such hosts, but when the virus is dispersed to aberrant hosts they may suffer severe epidemics of disease with a high mortalityThe Brewer's blackbird was noted to have the necessary abundance and migration pattern so that it could be ... (AU)
The ecology of arthropod-borne virus diseases of man
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