Abstract：
:Parasitologic, serologic, and epidemiologic studies were done during 1967 in Calion, Arkansas (population 544). Infection with Entamoeba histolytica was found to be endemic but was segregated along racial lines. Twenty-two (9.9%) black compared with only one (0.6%) white had E. histolytica demonstrated in one stool examination; only two blacks had symptoms suggestive of amebiasis. No positive amebiasis indirect hemaggulination titers were found in 135 white residents. In contrast, 41 (17.9%) blacks had positive titers. Age, sex, and geographic location were not associated with stool or seropositivity. Within the black population, clustering of stool and seropositivity occurred. Significantly higher rates of stool and seropositivity were seen in households with crowding and poor sanitation as evidenced by lack of indoor toilet facilities. The presence of contaminated water supplies did not correlate with stool or seropositivity. The probable importance of person-to-person transmission is suggested by the observed clustering of infection within households with crowding and unsanitary conditions. The absence of evidence for transmission by food or water further supports this hypothesis.
journal_name
Am J Epidemioljournal_title
American journal of epidemiologyauthors
Spencer HC Jr,Hermos JA,Healy GR,Melvin DM,Shmunes Edoi
10.1093/oxfordjournals.aje.a112279subject
Has Abstractpub_date
1976-07-01 00:00:00pages
93-9issue
1eissn
0002-9262issn
1476-6256journal_volume
104pub_type
杂志文章abstract：:Computer simulation was applied to Sartwell's model to examine the impact of competing risks of death on the underlying assumptions and the power to reject both uniform and normal incubation period distributions. Exponential and nonparametric survival functions were imposed onto lognormal, uniform, and normal distribu...
journal_title：American journal of epidemiology
pub_type： 杂志文章
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更新日期：1995-08-01 00:00:00
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更新日期：1983-11-01 00:00:00
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pub_type： 杂志文章,meta分析,评审
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更新日期：1992-09-01 00:00:00
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更新日期：1990-07-01 00:00:00
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更新日期：1985-01-01 00:00:00
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更新日期：2019-01-01 00:00:00
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更新日期：2004-11-01 00:00:00
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更新日期：1999-02-15 00:00:00
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更新日期：1990-08-01 00:00:00
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pub_type： 评论,杂志文章
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更新日期：2014-03-01 00:00:00
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更新日期：2019-01-01 00:00:00
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更新日期：2008-03-01 00:00:00
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更新日期：2007-08-01 00:00:00
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更新日期：2016-01-15 00:00:00
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journal_title：American journal of epidemiology
pub_type： 杂志文章
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更新日期：2006-07-15 00:00:00
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pub_type： 评论,杂志文章
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更新日期：2009-11-01 00:00:00
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更新日期：1990-01-01 00:00:00
