Network analysis of 318 Plasmodium falciparum microsatellite haplotypes from Papua New Guinea. Weighted network of haplotypes showing relationships among individuals of each catchment. Each coloured circle represents a haplotype (node), and black lines indicate shared alleles among individual haplotypes. Orange = Wosera, Blue = Utu, Red = Malala, Green = Mugil. The threshold for a connection was set at three matching loci between two haplotypes.