| epidemic yellow fever caused by an incompetent mosquito vector. | arbovirus epidemics in a geographic region are believed to depend on the presence of susceptible or "competent" arthropod vectors. we demonstrate that an urban, aedes aegypti-borne, epidemic of yellow fever occurred in 1987 although the mosquito vector was relatively resistant to infection and transmitted the virus inefficiently. twenty-six percent of the experimental mosquitoes from the epidemic area that ingested yellow fever virus became infected and only 7% of these transmitted the virus. in ... | 1989 | 2623418 |