title: THE DETECTION OF POLIOMYELITIS VIRUS IN FLIES COLLECTED DURING EPIDEMICS OF POLIOMYELITIS : II. CLINICAL CIRCUMSTANCES UNDER WHICH FLIES WERE COLLECTED.
abstract: During the summer and fall of 1941, 19 samples of flies were collected in epidemic areas both during and after epidemics of poliomyelitis. Of 8 samples collected for the most part during the latter part of a local epidemic but within 10 days of the onset of a local case of poliomyelitis, 4 yielded the virus; whereas of 8 samples collected more than 10 days from the onset of the last local case, none yielded the virus. In 4 instances there was a potential (though not proven) source of virus (in the form of "exposed" human feces of recent origin) within a few yards or few feet of the site where fly collections were made. Collections of flies from 3 of these sites yielded the virus. No attempt is made in this paper to develop epidemiological implications from this finding.
authors.affiliation: Department of Pediatrics and the Section of Preventive Medicine, Yale University School of Medicine, New Haven.
authors.forename: J D
authors.initials: JD
authors.lastname: Trask
authors.forename: J R
authors.initials: JR
authors.lastname: Paul