Molecular detection of Rickettsia felis in ticks and fleas from the environment in Hanoi and Phu Tho province, Vietnam. - Ma Thi, Huyen; Thi Kim, Tuyen Tong; Tran Mai, Hoa; Dang Thi, Huong; Vuong Quang, Tien; Thi Tuyet, Mai Dao; Dao Gia, Bach; Farris, Christina M.; Richards, Allen L.; Nguyen Vu, Trung; Le Thi, Hoi (Journal of Infection in Developing Countries, 2026)