A microsatellite marker reveals population heterogeneity within human and animal genotypes of cryptosporidium parvum
| Autor: | T. Kortbeek, W. Homan, Edoardo Pozio, Romina Camilli, G. Traldi, Simone M. Cacciò |
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| Rok vydání: | 2000 |
| Předmět: |
Molecular Sequence Data
Cattle Diseases Cryptosporidiosis Locus (genetics) Polymerase Chain Reaction law.invention Feces Japan law Sequence Homology Nucleic Acid Genotype Genetic variation Animals Humans Genetic variability Ribosomal DNA Polymerase chain reaction DNA Primers Genetics Cryptosporidium parvum Electrophoresis Agar Gel Sheep biology Base Sequence Deer Goats Genetic Variation Sequence Analysis DNA DNA Protozoan biology.organism_classification United States Europe Infectious Diseases Microsatellite Animal Science and Zoology Parasitology Cattle Sequence Alignment Microsatellite Repeats |
| Zdroj: | ResearcherID |
| ISSN: | 0031-1820 |
| Popis: | Isolates of the protozoan parasite Cryptosporidium parvum have been differentiated into 2 genotypes: genotype ‘H’, which is associated only with human infections, and genotype ‘C’, which is associated with both human and animal infections. To date, the analysis of polymorphisms of genes and of the small subunit ribosomal DNA have revealed no heterogeneity within the 2 genotypes. In the present study, a locus containing simple sequence repeats (microsatellites) was PCR amplified and sequenced from 94 C. parvum isolates, which were collected from humans (immunocompetent and immunocompromized individuals, outbreak and single cases) and from several animal hosts in 3 continents. The analysis revealed that genotype ‘H’ can be further differentiated into 2 subgenotypes, and genotype ‘C’ can be further differentiated into 4 subgenotypes. The 6 subgenotypes differ in terms of expansions/contractions of the microsatellite repeats and by point mutations. Some subgenotypes showed a wide geographical distribution, whereas others were restricted to specific regions. Therefore, microsatellites are informative markers for more defined studies on the epidemiology, the transmission routes, and the population structure of this parasite. |
| Databáze: | OpenAIRE |
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