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1991年上半年,保加利亚经历了十几年来的首次脊髓灰质炎(以下称脊灰)暴发。首例脊灰的麻痹日期发生在90年12月底,但直到91年1月底才正确地予以诊断和报告。由于该国有着高免疫水平,且先前曾发生过一起由肠道病毒引致的急性弛缓性麻痹病例的暴发,故本次的首批病例被认为由非脊灰的其它肠道病毒感染所致。尽管如此,但仍开展了小范围的脊灰疫苗(OPV)普服,等到病毒分离证实脊灰Ⅰ型病毒为病原时,暴发的疫情已波及至其它县。流行病学调查显示,起始病例主要聚集在该国东部的 Sliven 地区。已确诊的43例病
In the first half of 1991, Bulgaria experienced the first outbreak of polio (hereinafter referred to as polio) in more than a decade. The first polio paralysis date occurred at the end of December 1990, but was not correctly diagnosed and reported until the end of January 1991. Due to the high level of immunization in the country and the previous outbreak of acute flaccid paralysis caused by enteroviruses, an outbreak of this first case was considered to be caused by infection with other enteroviruses other than polio. In spite of this, a small-scale poliovirus vaccine (OPV) has yet to be introduced. Until the isolation of the virus confirms the presence of the poliovirus type I virus, the outbreak has spread to other counties. Epidemiological surveys show that the initial cases are mainly concentrated in the Sliven area in the east of the country. Has confirmed 43 cases of disease