Figure 1.
Location of the villages sampled in two geographic areas (A and B) of Samar Province, the Philippines.
The inset map shows the location of Samar in the Philippines. Adapted from an original version in Akullian A (2007) Spatial patterns of schistosomiasis: A watershed approach to measuring S. japonicum environmental risk and human and animal disease outcomes [Sc.B. Thesis]. Brown University.
Table 1.
Number of Schistosoma japonicum isolates genotyped and number of hosts sampled by geographic area and host species.
Figure 2.
Genetic differentiation of Schistosoma japonicum among definitive host species and geographic areas
.
Estimates of Wright's F-statistics for genetic differentiation of S. japonicum miracidia (black diamonds) and cercariae (white circles) population isolates. Error bars represent 95% confidence intervals estimated from 20 000 bootstraps.
Table 2.
Test for Hardy-Weinberg equilibrium.
Table 3.
Summary statistics for Schistosoma japonicum population isolates across host species.
Figure 3.
Neighbor-joining tree of Schistosoma japonicum miracidia from different host species in Samar, the Philippines.
“China-controls” represent cercariae from Anhui Province, China. Tree is based on C.S. Chord genetic distance [35] based on 7 microsatellite loci. Bootstrap values (out of 100) are indicated at the branch points.
Table 4.
Genetic variance components for Schistosoma japonicum miracidia isolates at the definitive host species level.
Table 5.
Pairwise between definitive host species and snail-intermediate host Schistosoma japonicum isolates.
Figure 4.
Neighbor-joining tree of Schistosoma japonicum cercariae from 14 villages in two geographic areas of Samar, the Philippines.
Cercariae from three villages in Anhui Province, China (GH, Guanghui; HP, Heping; XZ, Xingzhuang) are also displayed. Tree is based on C.S. Chord genetic distances [35] based on 7 microsatellite loci. Geographic area and village codes are indicated at the end of each branch. Bootstrap values (out of 100) are indicated at the branch points. Branches are color coded according to geographic area.