Identification and Characterization of Microsatellite Markers Derived from the Whole Genome Analysis of Taenia solium

Mónica J. Pajuelo, María Eguiluz, Eric Dahlstrom, David Requena, Frank Guzmán, Manuel Ramirez, Patricia Sheen, Michael Frace, Scott Sammons, Vitaliano Cama, Sarah Anzick, Dan Bruno, Siddhartha Mahanty, Patricia Wilkins, Theodore Nash, Armando Gonzalez, Héctor H. García, Robert H. Gilman, Steve Porcella, Mirko Zimic

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Background: Infections with Taenia solium are the most common cause of adult acquired seizures worldwide, and are the leading cause of epilepsy in developing countries. A better understanding of the genetic diversity of T. solium will improve parasite diagnostics and transmission pathways in endemic areas thereby facilitating the design of future control measures and interventions. Microsatellite markers are useful genome features, which enable strain typing and identification in complex pathogen genomes. Here we describe microsatellite identification and characterization in T. solium, providing information that will assist in global efforts to control this important pathogen. Methods: For genome sequencing, T. solium cysts and proglottids were collected from Huancayo and Puno in Peru, respectively. Using next generation sequencing (NGS) and de novo assembly, we assembled two draft genomes and one hybrid genome. Microsatellite sequences were identified and 36 of them were selected for further analysis. Twenty T. solium isolates were collected from Tumbes in the northern region, and twenty from Puno in the southern region of Peru. The size-polymorphism of the selected microsatellites was determined with multi-capillary electrophoresis. We analyzed the association between microsatellite polymorphism and the geographic origin of the samples. Results: The predicted size of the hybrid (proglottid genome combined with cyst genome) T. solium genome was 111 MB with a GC content of 42.54%. A total of 7,979 contigs (>1,000 nt) were obtained. We identified 9,129 microsatellites in the Puno-proglottid genome and 9,936 in the Huancayo-cyst genome, with 5 or more repeats, ranging from mono- to hexa-nucleotide. Seven microsatellites were polymorphic and 29 were monomorphic within the analyzed isolates. T. solium tapeworms were classified into two genetic groups that correlated with the North/South geographic origin of the parasites. Conclusions/Significance: The availability of draft genomes for T. solium represents a significant step towards the understanding the biology of the parasite. We report here a set of T. solium polymorphic microsatellite markers that appear promising for genetic epidemiology studies.

Original languageEnglish
Article numbere0004316
JournalPLoS Neglected Tropical Diseases
Volume9
Issue number12
DOIs
StatePublished - 23 Dec 2015

Bibliographical note

Funding Information:
This work was partially supported by the Fogarty International Center/NIH Training Grants D43TW001140 and D43TW006581. HHG. is supported by a Wellcome Trust Senior International Research Fellowship in Public Health and Tropical Medicine. The funders had no role in study design, data collection and analysis or interpretaion; in writing the report or in the decision to submit this manuscript for publication.

Fingerprint Dive into the research topics of 'Identification and Characterization of Microsatellite Markers Derived from the Whole Genome Analysis of Taenia solium'. Together they form a unique fingerprint.

Cite this