Fleas as Intermediate Hosts of Helminths

vectors. Transmission of mature larvae by these fleas occurs by bite. Dogs, jackals, and hyenas are the principal definitive hosts of A. reconditum.

Several other species of helminths have been isolated from wild-caught fleas, and fleas have been found to serve as suitable intermediate hosts under laboratory conditions. However, the importance of fleas in maintaining these pathogens in nature is unknown. For example, the trichina worm ( Trichinclla spiralis) has been found encysted in the Oriental rat flea in India; this helminth normally encysts in muscle tissue of rats and hogs, causing trichinosis.

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