Molecular detection of Rickettsia felis in ticks and fleas from the environment in Hanoi and Phu Tho province, Vietnam. - Ma Thi H; Tong Thi Kim T; Tran Mai H; Dang Thi H; Vuong Quang T; Dao Thi Tuyet M; Dao Gia B; Farris CM; Richards AL; Nguyen Vu T; Le Thi H (Journal of infection in developing countries, 2026)