| Oocytes ingested from contaminated soil or other sources excyst in the duodenum, and released sporozoites invade the intestine. |
| Inside the liver, the sporozoites change form and then grow and divide into thousands of merozoites. |
| The sporozoites migrate to the salivary glands and are inoculated into a new vertebrate host when the mosquito feeds. |
| Purification of Cryptosporidium oocysts and sporozoites by cesium chloride and percoll gradients. |
| Identification of Plasmodium vivax sporozoites in mosquitoes using an enzyme-linked immunosorbent assay. |
| The sporozoites released from the oocyst reproduce asexually within cells, producing merozoites that burst from those cells, each to infect a new cell. |
