That some vectors other than the body louse may be responsible for the transmission of endemic (New World) typhus is becoming an accepted fact, through the work of a number of investigators. Maxcy1 and Shelmire and Dove2 suggested rat fleas as possible vectors, and Dyer, Rumreich and Badger3 recently published their observations on a virus of the typhus type derived from fleas collected from wild rats.
In November, 1930, Shelmire and Dove, in connection with their work on the tropical rat mite as a possible vector of endemic typhus, trapped a number of wild rats in and around feed stores in Henderson, Texas, a town in which a large number of cases of endemic typhus have occurred in recent years.2 A number of fleas (Ceratophyllus fasciatus and Xenopsylla cheopis) were secured from these rats. Shelmire and Dove gave me some of these fleas for studies in
KEMP HA. ENDEMIC TYPHUS FEVERRAT FLEA AS A POSSIBLE VECTOR. JAMA. 1931;97(11):775–777. doi:10.1001/jama.1931.02730110025007