AGO3 and infection: Four days post infection (dpi), the expression of Ago3, Piwi1/3, Piwi6 and Piwi7 was between 4 to 10 folds higher than that of Piwi2, Piwi4 and Piwi5, which nevertheless were upregulated with respect to ovaries of sugar- and blood-fed mosquitoes.