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The Extrinsic Incubation Period And The Structure And Composition Of The Latency Period

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Chapter Summary

In order to understand and explain the defining feature of bubonic plague designated the latency period, some technical aspects of the epizootic process among rats and the functions of their fleas must be identified and clarified. The time that passes between when a species of fleas becomes infected and when it becomes blocked and infective is called as the extrinsic incubation period or the infection-infectivity interval and represents a highly variable property between various species of fleas. The IPRC showed the basis of the latency period, specifically that from the time of the introduction of an infective rat flea into a rat colony it took about 1014 days before the colony was so severely reduced that rat fleas leaving dead rats had difficulties in finding a new rat host and after a few days began to attack human beings in their proximity.

Keywords: bubonic plague; extrinsic incubation period; latency period; rat fleas



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