The infection rate of this species in dog following to provinces included: Ñong Thap 17.17%, Ca Mau 10%, Binh Duong 9.33%, Tay Ninh 8%, Long An 7.06%, Kien Giang 5%, Ñong Nai 4%, Ho Chi Minh city 2.5%, Ben Tre 2%, Tra Vinh 0.9%.