Sentence examples for by an intermediate host from inspiring English sources
The egg is then ingested by an intermediate host.
Following ingestion by an intermediate host, the infective larvae hatch in the small intestine and then penetrate the intestinal wall, migrate through the liver and lungs, and undergo extensive somatic dissemination (1 – 3 ).
When the eggs are swallowed by an intermediate host such as a sheep, the eggs hatch to release larval oncospheres into the digestive tract which are activated by bile and gastrointestinal enzymes.
Adult T. multiceps are found in the small intestine of dogs and other canids, and gravid proglottids in host feces are a source of infection following ingestion by an intermediate hosts [ 23].
In addition, the quail is thought to play an important role in the evolution of influenza viruses by acting as an intermediate host in which avian influenza viruses can be amplified and transmitted to other animal species [ 42].
If sexuality tends to be intimately associated with a multi-host life cycle in microsporidia then the loss of sex might occur as a by-product of the elimination of an intermediate host from the life cycle.
Tapeworms of the subclass Eucestoda are generally transmitted from host to host by direct ingestion of eggs; by ingestion of intermediate hosts containing larval stages; and, very rarely, by passage of a larva from an intermediate host through a skin wound into another intermediate host.
Parasites with indirect life cycles are characterized by two host stages, which require a definitive host and an intermediate host.
Some parasite species have evolved to alternate between their final host and an intermediate host, or vector, that transfers the parasite from one final host to another: the malarial parasite Plasmodium falciparum alternates between a final human host and an intermediate mosquito host by which the parasite is transferred from one person to another.
