Detection of Anopheles stephensi mosquitoes by molecular surveillance, Kenya od Ochomo, EO, Milanoi, S, Abong'o, B, Onyango, B, Muchoki, M, Omoke, D, Olanga, E, Njoroge, L, Juma, EO, Otieno, JD, Matoke-Muhia, D, Kamau, L, Rafferty, C, Gimnig, JE, Shieshia, M, Wacira, D, Mwangangi, J, Maia, M, Chege, C, Omar, A, Rono, MK, Abel, L, O'Meara, WP, Obala, A, Mbogo, C, Kariuki, L