Dr. Thompson said the mosquito was an intermediate host, required for transmission.
Man is the definitive host; cattle serve as the intermediate host.
People do not commonly come into contact with bats, so an intermediate host is probably involved.
In addition, many species must first invade another intermediate host, typically a fish or amphibian.
Both parasites use the same snail, Galba truncatula, as intermediate host.
However, the amphipod commonly serves as second intermediate host for detrimental microphallid trematodes.
Rangeland goats do not appear to be an intermediate host for E. granulosus.
E. coli AU1 is a useful intermediate host for efficient transformation of C. glutamicum.
The importance of A. fulica as an intermediate host of eosinophilic menigoencepahlitis in Brazil is emphasized.
The flu could also be in an intermediate host, said Dr. Cox, as the 2002 SARS virus passed from bats to humans through palm civets.
In the case of the broad tapeworm, for example, humans serve as the final (or definitive) hosts, various species of fish as one intermediate host, and species of a small water crustacean (Cyclops) as another intermediate host.
