| introduction of the american/asian genotype of dengue 2 virus into the yucatan state of mexico. | a dengue (den) outbreak occurred in the yucatan state of mexico in 2002. three isolates were obtained from patients presenting with den-like symptoms, and examined by partial nucleotide sequencing and phylogenetic analysis. the isolates were identified as den-2 viruses of the american-asian genotype; this is the first report of this genotype in the yucatan state. the den-2 viruses of the american-asian genotype have been associated with more severe disease outcomes. thus, its introduction into t ... | 2004 | 15516647 |