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India has been suffering from a visi- , tatiou of plague, wliicli has now lasted intermittently for more than 20 years; but it is believed that there are now perceptible signs that the periodical epidemics are permanently abating in j virulence. ,The reason given is aj strange one, though it was not .en- 1! tirely unexpected. Direct experimental investigation has shown that the newer generations of rats are developing com'psirative immunity from plague infection, and it is assumed that in time the rats in long-aifected areas may become completely plague-proof. That i this would probably be the eventual outcome of the visitation of plague in India was always predicted by Dr. C. J. Martin, F.R.S., the director of the Lister Institute, who organised the remarkable and prolonged series of. researches which demonstrated that the infection was conveyed by rat fleas from rat to man. Dr. Martin/s first inquiries into plague were made in 1897, and he has repeatedly, affirmed the conviction which now appears to be in process of establishment.

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Bibliographic details

PLAGUE-PROOF RATS., Ashburton Guardian, Volume XXXIX, Issue 9589, 17 April 1919

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PLAGUE-PROOF RATS. Ashburton Guardian, Volume XXXIX, Issue 9589, 17 April 1919

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