Natural vertical transmission of dengue viruses by Aedes aegypti in Bolivia G. Le Goff, J. Revollo, M. Guerra, M. Cruz, Z. Barja Simon, Y. Roca, J. Vargas Florès and J.P. Hervé Parasite, 18 3 (2011) 277-280 Published online: 15 August 2011 DOI: 10.1051/parasite/2011183277