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Una nueva forma de caracterizar poblaciones de Schistosoma mansoni provenientes de humanos: desarrollo y evaluación de análisis microsatelital de miracidios agrupados
Author(s) -
Hanelt B.,
Steinauer M. L.,
Mwangi I. N.,
Maina G. M.,
Agola L. E.,
Mkoji G. M.,
Loker E. S.
Publication year - 2009
Publication title -
tropical medicine and international health
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.056
H-Index - 114
eISSN - 1365-3156
pISSN - 1360-2276
DOI - 10.1111/j.1365-3156.2009.02226.x
Subject(s) - schistosoma mansoni , microsatellite , biology , allele , genotyping , allele frequency , pooling , population , genetics , population genetics , schistosoma , schistosomiasis , zoology , genotype , helminths , demography , gene , artificial intelligence , sociology , computer science
Summary Objectives To develop and assess a microsatellite technique to characterize populations of Schistosoma mansoni from humans. Methods For each of five patients, we calculated the allele count and frequency at 11 loci for several pools of miracidia (50 and 100), and compared these to population values, determined by amplifying microsatellites from 186 to 200 individual miracidia per patient. Results We were able to detect up to 94.5% of alleles in pools. Allele count and frequency strongly and significantly correlated between singles and pools; marginally significant differences ( P < 0.05) were detected for one patient (pools of 50) for allele frequencies and for two patients (pools of 100) for allele counts. Kato–Katz egg counts and number of alleles per pool did not co‐vary, indicating that further direct comparisons of the results from these two techniques are needed. Conclusions Allele counts and frequency profiles from pooling provide important information about infection intensity and complexity, beyond that obtained from traditional methods. Although we are not advocating use of pooling to replace individual genotyping studies, it can potentially be useful in certain applications as a rapid and cost effective screening method for studies of S. mansoni population genetics, or as a more informative way to quantify and characterize human worm populations.