These combine and grow to become the immature form of the parasite, called a sporozoite.

这些结合并生长成为寄生虫的未成熟形式，称为子孢子。

Then, when that mosquito bites another human, the sporozoites are injected too, and travel to the liver to hunker down, grow, and multiply.

，当那只蚊子叮咬另一个人时， 子孢子也被注入，并移动到肝脏， 在那里留、生长和繁殖。

Knocking out just three of the 5000 genes in the P. falciparum genome can prevent sporozoites from maturing and reproducing, so they can’t infect the bloodstream.

仅敲除恶性疟原虫基因组中 5000 个基因中的三个，就止子孢子成熟和繁殖，因此它们无法感染血液。

They infected mosquitoes with the genetically-engineered sporozoites and let them snack on the volunteers’ forearms. And none of the people in the trial developed malaria, so that’s good!

他们用基因工程子孢子感染蚊子，让它们在志愿者的前臂上当零食。而且试验中没有人患上疟疾，这很好！

Each sporozoite produces as many as 30,000 mature parasite cells called merozoites, which spread through the bloodstream, burrow into red blood cells, and cause a full-blown infection.

每个子孢子产生多达 30, 000 个称为裂殖子的成熟寄生虫细胞，它们通过血液传播， 钻入红细胞， 并引起全面感染。