| variation in the sequence of a mitochondrial nadh dehydrogenase i gene fragment among six natural populations of schistosoma japonicum from china. | the present study investigated the level of genetic variation among schistosoma japonicum populations of different geographical origins from mainland china. polymerase chain reaction-based methods were employed to determine the sequence for a subunit of the mitochondrial nadh dehydrogenase i gene for populations from zhejiang, anhui, jiangxi, hunan, hubei and sichuan. no variation was detectable in the nadh dehydrogenase i sequence within populations from zhejiang and hubei, whereas sequence var ... | 1998 | 9925274 |
| an electrophoretic comparison of schistosoma japonicum (trematoda) from different provinces in the people's republic of china suggests the existence of cryptic species. | schistosoma japonicum from the people's republic of china is considered to represent a single species comprising either 1 or 4 'strains'. we conducted an allozyme electrophoretic study to examine the extent of genetic variation in s. japonicum from mainland china. the allelic profiles of s. japonicum from 7 provinces were established at 16 enzyme loci. s. japonicum from sichuan had 3-5 (19-31%) fixed differences compared with those from zhejiang, anhui, jiangxi, hunan, hubei and yunnan, suggesti ... | 1999 | 10581616 |