Transmission is by direct and indirect contact, and by transplacental and congenitaltransmission.
所属病毒通过直接和间接接触传播，或经胎盘和先天性传播。
2
Objective to study congenitaltransmission of Trichinella spiralis in mice and observe the protection of anti-Trichinella antibodies from the infected DAMS to challenge infection.
目的研究旋毛虫在小鼠的先天性传播并观察母鼠抗旋毛虫抗体对攻击感染的保护作用。
3
Transmission can also occur by inoculation or via the placenta (congenital monkeypox).