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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 108, No. 7, 2013, pp. 910-920
Bioline Code: oc13152
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 108, No. 7, 2013, pp. 910-920

 en Genetic variation in the Cytb gene of human cerebral Taenia solium check for this species in other resources cysticerci recovered from clinically and radiologically heterogeneous patients with neurocysticercosis
Palafox-Fonseca, Héctor; Zúñiga, Gerardo; Bobes, Raúl José; Govezensky, Tzipe; Piñero, Daniel; Texco-Martínez, Laura; Fleury, Agnès; Proaño, Jefferson; Cαrdenas, Graciela; Hernαndez, Marisela; Sciutto, Edda & Fragoso, Gladis


Neurocysticercosis (NC) is a clinically and radiologically heterogeneous parasitic disease caused by the establishment of larval Taenia solium check for this species in other resources in the human central nervous system. Host and/or parasite variations may be related to this observed heterogeneity. Genetic differences between pig and human-derived T. solium cysticerci have been reported previously. In this study, 28 cysticerci were surgically removed from 12 human NC patients, the mitochondrial gene that encodes cytochrome b was amplified from the cysticerci and genetic variations that may be related to NC heterogeneity were characterised. Nine different haplotypes (Ht), which were clustered in four haplogroups (Hg), were identified. Hg 3 and 4 exhibited a tendency to associate with age and gender, respectively. However, no significant associations were found between NC heterogeneity and the different T. solium cysticerci Ht or Hg. Parasite variants obtained from patients with similar NC clinical or radiological features were genetically closer than those found in groups of patients with a different NC profile when using the Mantel test. Overall, this study establishes the presence of genetic differences in the Cytb gene of T. solium isolated from human cysticerci and suggests that parasite variation could contribute to NC heterogeneity.

neurocysticercosis; Taenia solium; cysticercosis; genetic variability

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