Studies on the rats and fleas in the harbor areas of Yokohama and Kawasaki : 3 Fleas in the overseas ships

Abstract

Xenopsylla cheopis was found from 5 overseas cargo ships out of 45 at Yokohama Port in 1966. Captured rats were 1, 099 and 64 X. cheopis were collected. The ships positive with X. cheopis were all on the Asian line and showed the positive rate 18.5% out of 27 ships on the same line. X. cheopis parasitized abandantly on M. musculus as much as on R. rattus and distributed in the various sections of the ships.