DESIGN: A retrospective descriptive epidemiology study.

设计：回顾性描述流行病学分析。

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The objective of epidemiology study is to search aetiology, and to measure its causal effect in the light of quantity, thereby prevent from the occurrence of disease.

流行病学研究的目的是寻找疾病的病因，并对其产生的因果效应进行定量测量，进而预防疾病的发生。

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Objective to investigate the DNA type of Trichophyton rubrum and to discuss the application of DNA typing method in its clinical identification and epidemiology study.

目的研究红色毛癣菌dna分型并探讨DNA分型技术在临床菌种鉴定以及流行病学中的应用。

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The latest study was presented Saturday at a meeting of the Society for Health Care Epidemiology in Dallas,Texas.

VOA: special.2011.04.06

It is also impossible for governmental entities such as the Centers for Disease Control and Prevention to conduct a thorough, painstaking epidemiology study to ascertain the type of virus and its origin.

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And earlier this year the evidence against many hours of sitting expanded further: The American Journal of Epidemiology published a study finding that those who work a sedentary job have almost twice the risk of a specific type of colon cancer.

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The Department of Health said the Journal of Epidemiology and Community Health study was based on old data.

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