Detection of Anopheles stephensi mosquitoes by molecular surveillance, Kenya by 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