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To the Editor:
—Having lived in Porto Rico and being familiar with conditions there, I should like to call attention to the mongoos as a possible factor in spreading the plague, as this animal does not seem to have been mentioned in this connection.The mongoos is about the size and shape of our timber or large gray squirrel and is said to have been introduced into Porto Rico for the purpose of exterminating rats. While it has not done this, it has well-nigh exterminated the birds by robbing their nests. The mongoos is so nearly like the rat and the squirrel in size, habits and haunts that it would seem to be quite as likely to contract plague as our squirrels, which are known to be susceptible and therefore dangerous carriers.Our plague experts in Porto Rico would do well to examine all these animals that can be captured,
Ruth CE. The Mongoos as Plague-Carrier in Porto Rico. JAMA. 1912;LIX(5):386. doi:10.1001/jama.1912.04270080068029