流行病学的

Restriction sites polymorphisms of rRNA gene for Leptospira can be used to classify and identify Leptospira in China and also to study on molecular epidemiology for leptospirosis.

rRNA基因限制性内切酶酶切位点多态性可用于钩体分类，而且是钩体病分子流行病学调查的一种好方法。

Methods Collectine the information of204patients with melasma seen in four hospitals in Tianjin to do a retrospective study.

4家医院对2003年到门诊就诊的黄褐斑患者进行回顾性流行病学研究。

He paper investigates the heart rate of 408 silk women exposure to noise in workshopsby occupationally epidemiological survey.

采用职业流行病学调查方法，对408名噪声暴露中缫丝女工的心率进行了调查。

The exposure group was consisted of the workers working in the workshop, who were occupationally exposed to lead for more than one year.

骨骼是铅的主要靶器官之一，人群流行病学调查和动物实验显示，铅能导致骨软化及骨质疏松。

Pathological observation showed that infected ducklings were characterized by pericarditis, perihepatitis and all body septicemias.

流行病学调查结果表明，感染鸭日龄多为2～6周龄，并有大日龄发病的趋势。

In female groups, the peak value of phalangeal BMD (MP2-4) of the non-dominant hand occurred between the age of 20-39 years, hut sharply after 50 years old descended.

采用放射吸收法测定指骨骨密度所获得的测量结果，符合骨质疏松流行病学发病基本规律。

Observation on the effect of spraying Baythroid in animals′ vault in preventing and controlling the medium of leishmaniasis- Phlebotomus chinensis

%溴氰菊脂可湿性粉剂 2 5 0mg/L家犬防治中华白蛉措施后，逐年进行野外洞穴白蛉密度观察和当地内脏利什曼病的流行病学调查。

Researchs in epidemiology showed seropositive for HSV were increasing obviously in most countries in the past 20 years.

流行病学研究显示：过去 20 年中，世界大多数国家 HSV 的血清患病率显著增加。

Rabbits remained seropositive up to the end of the experiment(on week 10 post-infection).

研究结果为该病的流行病学调查及免疫预防奠定了基础。

Objective To investigate the incidence, the risk factors and the outcome of nosocomial tracheobronchitis in patients age over 65 years of age receiving mechanical ventilation.

目的探讨机械通气老年患者并发院内气管支气管炎的危险因素，为制定院内感染防治措施提供流行病学资料和科学依据。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。