| first reported outbreak of classical dengue fever at 1,700 meters above sea level in guerrero state, mexico, june 1988. | an outbreak of classical dengue fever occurred from march to august 1988 in the city of taxco, guerrero state, mexico. taxco is at an elevation of 1,700 meters above sea level, and this study represents the highest altitude at which an outbreak of dengue has been documented. an investigation was conducted to obtain serologic confirmation of dengue infection, determine the extent of the outbreak, and identify risk factors for dengue illness. toxorhynchites cell lines were used for viral isolation ... | 1992 | 1621889 |