易传染的

The IOM's recommendation to use fit-tested N95s drew criticism on practicality grounds today from Ruth Carrico, an infection control expert at the University of Louisville School of Public Health and Information Sciences and a former APIC board member.

今天，IOM使用经过适合性检验的N95防护口罩的建议招致Ruth Carrico女士的批评。作为APIC前任理事会成员，美国路易斯维尔大学公共健康和信息科学学院的传染控制专家，Carrioc女士认为报告缺少可行性基础。

The HPV infection mainly is the passing way crumples broadcasts,is easy to implicate the scale shape epidermis,specially Yi Zhongzu and palace pate scale shape cell.

HPV传染主要是路程经过过程性路子抟播，易连累到鳞状上皮，出格易连累到宫颈部的鳞状细胞。

The causative agent of the disease is an Corona virus, infectious bronchitis virus IBV）, classified as Corona .Present vaccines for IB are all modified live viruses derived either by sequential passage embrocated chicken eggs. As Immunogenicity of IBV is usually correlated with its virulence, almost all modified live IB vaccines remained insufficient attenuation and have shown a variety of side effects including spread of vaccine virus to no vaccinates, occurrence of long term "carrier" birds, and increasing virulence during in vivo passage.

目前国内外预防本病所用的疫苗大多数是弱毒疫苗，但现用弱毒疫苗都存在以下缺点：（1）与IBV强毒一样，其弱毒疫苗株也能引起潜伏感染，潜伏感染的鸡将终生带毒；（2）疫苗病毒可以由接种鸡传染给非接种鸡，在鸡群之间传播过程中毒力会返强，从而成为新的感染源；（3）传染性支气管炎病毒极易发生变异，且易成为病毒重组的供体和受体，给使用IB传统疫苗预防和根除IB带来极大的困难。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。