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The epidemic of dengue fever that prevailed in Louisiana from the early part of September until the latter part of December, 1922, was doubtless introduced into the state from Texas. Reports indicate that Galveston and Houston had been suffering from this disease for some time, and the case dissemination followed closely the course of the Southern Pacific Railroad, the main line of communication between the two states.
Shortly after the invasion of southern Louisiana, the epidemic spread diagonally northwest, toward Shreveport, closely approximating the Texas and Pacific line. Subsequent invasion of other cities to the right and left of both railway systems followed in due course.
It is quite impossible to know accurately the actual number of cases that occurred; the official reports so far received show less than 8,000. A survey made during the early part of the epidemic indicated that only a fraction of the cases that occurred
SCOTT LC. DENGUE FEVER IN LOUISIANA. JAMA. 1923;80(6):387–393. doi:10.1001/jama.1923.02640330023012
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