| Autor: | Rios, M., Fernandez, J., Jaramillo, P., Paredes, V., Sanchez, J. L., Laguna-Torres, V. A., Carr, J. K., Ramirez, E. |
| Revista: | AIDS research and human retroviruses |
| Año: | 2005 |
| Número: | 10 |
| Paginas: | 835-840 |
| Volumen: | 21 |
| Abstract: | We examined the genetic makeup of 221 HIV-1 strains from Chilean persons living with HIV/AIDS by HMA and DNA sequencing of the env gene: 143 cases were infected by sexual contact with an already-infected partner, 76 were infected by mother-to-child transmission, and 2 were transfusion related. We found env HIV-1 subtype B in 202 cases (91.4%) and subtype F in 19 cases (8.6%). Subtype B strains were found throughout the country whereas subtype F viruses were predominantly found in cases from the metropolitan/central to the northern regions of Chile (p < 0.01). Chilean F subtypes clustered in two different groups: viruses from the central region clustered with F subtypes from Argentina, Uruguay, and Brazil, and viruses from the northern region, which independently segregated from other South American and European F strains. All of the 59 men having sex with men (MSM) were infected with B subtype strains whereas 7 (9.2%) and 12 (15.8%), respectively, of heterosexually infected females and children were infected with F subtype strains (p < 0.01). It appears that F subtype strains have been introduced into Chile by separate heterosexual transmission events from other nearby countries in the Southern Cone whereas B subtype strains have continued to persist predominantly among MSM. |
| Idioma: | Ingles |
| Base de Datos: | PubMed |
| Ver Más: | http://www.ncbi.nlm.nih.gov/pubmed/16225409 |