[Experimental study of the infecting ability of the flea Coptopsylla lamellifer rostrata in the Kyzylkum natural focus of plague].
Experimental infecting of the fleas Coptopsylla lamellifer rostrata by plague was carried out. The fleas were infected by feeding through biomembrane (skin of a white mouse) with a mixture of defibrinated blood of guinea-pig and plague microbes. Under concentration 2-3 milliard of the microbes in 1 millilitre, from 60 to 100% of the fleas were infected. Forming of the block of proventriculus was observed in 9-13 day. Mean percent of blocking for all experiments was less than 1%. Maximal rate of blocking (2.8%) was observed in the experiment under everyday 3-hour feeding. After planting of the fleas with blocks on great gerbil (2 fleas on one gerbil) 20% of the gerbils were infected. The conclusion had been made that C. lamellifer rostrata has only insignificant effectiveness as a vector of plague agent in Kyzylkum. Probably it is caused by some specific features of this subspecies.
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Bliummer
D000818:Animals; D018562:Disease Transmission, Infectious; D005849:Gerbillinae; D007303:Insect Vectors / Q000382:microbiology* / Q000502:physiology; D051379:Mice; D010930:Plague / Q000635:transmission; D019518:Postprandial Period; D012426:Russia; D005423:Siphonaptera / Q000382:microbiology* / Q000502:physiology; D015010:Yersinia pestis