| The sporozoites released from the oocyst reproduce asexually within cells, producing merozoites that burst from those cells, each to infect a new cell. |
| The sporoplasm may be either a plasmodial mass, with numerous nuclei, or may form a certain number of uninuclear sporozoites. |
| Purification of Cryptosporidium oocysts and sporozoites by cesium chloride and percoll gradients. |
| 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. |
| On the other hand, the sporozoites may lie in the salivary gland alive and virulent for several weeks. |
