Differences between cryptosporidium parvum and giardia duodenalis?

Giardia lamblia (synonymous with Lamblia intestinalis and Giardia duodenalis) is a flagellated protozoan parasite that colonizes and reproduces in the small intestine, causing giardiasis. The giardia parasite attaches to the epithelium by a ventral adhesive disc, and reproduces via binary fission. Giardiasis does not spread via the bloodstream, nor does it spread to other parts of the gastro-intestinal tract, but remains confined to the lumen of the small intestine

Cryptosporidium parvum is one of several protozal species that cause cryptosporidiosis, a parasitic disease of the mammalian intestinal tract. Infection is caused by ingestion of sporulated oocysts transmitted by the fecal-oral route. In healthy human hosts, the median infective dose is 132 oocysts. The general C. parvum life cycle is shared by other members of the genus. Invasion of the apical tip of ileal enterocytes by sporozoites and merozoites causes pathology seen in the disease

Giardia Lamblia And Cryptosporidium