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  • Title: Molecular identification of Echinococcus granulosus genotypes (G1 and G7) isolated from pigs in Mexico.
    Author: Villalobos N, González LM, Morales J, de Aluja AS, Jiménez MI, Blanco MA, Harrison LJ, Parkhouse RM, Gárate T.
    Journal: Vet Parasitol; 2007 Jun 20; 147(1-2):185-9. PubMed ID: 17467177.
    Abstract:
    With the aim of genotyping Echinococcus granulosus cysts found in Mexican livestock, we collected hydatid cysts from the livers and lungs of pigs in slaughterhouses in the state of Morelos, Central Region of Mexico. DNA was extracted from the parasites and examined by polymerase chain reaction (PCR) of rDNA internal transcribed spacer 1 (ITS1-PCR), Eg9-PCR, Eg16-PCR, and PCR-restriction fragment length polymorphism (PCR-RFLP). In addition, fragments of the genes coding for mitochondrial cytochrome c oxidase subunit 1 (CO1) and NADH dehydrogenase 1 (ND1) were sequenced. Two different genotypes of E. granulosus were unequivocally identified, the common sheep genotype, G1, and the common pig genotype, G7. The G1 genotype of E. granulosus has not been previously demonstrated in Mexico. Because of its recognized infectivity in humans, G1 genotype is a direct threat to human health and its presence in Mexico is consequently of immediate public health importance and epidemiological relevance.
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