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Table 4 Plague transmission of X. skrjabini to great gerbils via artificial blood feeding*

From: Transmission efficiency of the plague pathogen (Y. pestis) by the flea, Xenopsylla skrjabini, to mice and great gerbils

Group Gerbil number Flea per gerbil Positive gerbil Days to develop disease in gerbils** Positive rate (%)
1 9 10 4 4, 5, 5, 5 44.4
2 10 30 4 6, 7, 7, 7 40.0
3 7 60 5 4, 4, 4, 5, 6 71.4
Total 26 / 13 / 50%
  1. *Fleas were infected twice in artificial feeder containing defibrinated great gerbil blood with Y. pestis (1.0 × 1010 CFU/ml).
  2. **The time for the great gerbils to develop plague disease after adding the infectious fleas.