Trans-Stadial and Transovarial Development of Disease Agents in Arthropods

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Abstract
Transovarial development from one generation of arthropods to the next is associated with the development of several, mostly acarine-borne, disease agents. It is of greatest significance in the natural history of scrub typhus in which it represents the only mechanism for rendering infective the unfed parasitic larvae of trombiculid mites. For other vectorparasite combinations it is an additional factor responsible for maintaining and distributing a disease agent.