青海省五侧纤蚤一新亚种记述（蚤目：多毛蚤科）

本文五侧纤蚤一新亚种，五侧纤蚤背突亚种。新亚咎与青海已知三个亚种有明显区别，标本保存于青海省地方病防治研究所。     

卷带倍蚤一新亚种——(蚤目:角叶蚤科)

卷带倍蚤(Amphalius spirataenius Liu,Wu et Wu,1966)从1966年发表以来,其分布地区现已遍及西藏、云南、青海、四川等省区。除了指名亚种(A。spirataenius spiratae-nius之外,1981年又报道了采自湖北省神农架地区的卷带倍蚤巴东亚种(Amphalius spi-rataenius badongensis),本文再报道采自四川阿坝藏族自治州黑水县的另一新亚种。     

倍蚤属一新亚种(蚤目:角叶蚤科)

最近,我们在鉴定采自若羌县阿尔金山山地的一批倍蚤标本时,确认该种为哗倍蚤指名亚种Amphalius clarus clarus Jordan et Rothschild,1922,而既往采自伊犁昭苏县天山山地的标本(1♂,曾被误认为指名亚种),和近年从乌恰县获得的标本则为一新亚种——天山亚种,兹记述如下:     

长爪沙鼠体蚤和巢蚤数量研究

1982～1996年对内蒙古自治区鄂托克前旗长爪沙鼠Meriones unguiculatus体蚤和巢蚤的数量进行了调查和分析,得到如下结果。获体蚤15种,同型客蚤指名亚种Xenopsylla conformis conformls (50.8%) 和秃病蚤蒙冀亚种Nosopsyllus laveiceps kuzenkovi (40.6%)为优势种。获巢蚤15种,秃病蚤蒙冀亚种(74.3%)为优势种;盔状新蚤Neopsylla galea (11.9%)和叶状切唇蚤突高亚种Coptopsyllus lamelliferardua (8.1%)为常见种。年巢蚤指数的均值是年体蚤指数的6.92倍。体蚤指数与巢蚤指数不相关(P>0,05),体染蚤率与巢染蚤率不相关(P>0.05)。不同年份 的体蚤和巢蚤多样性比较稳定。连续两年春季或秋季秃病蚤巢蚤指数大于10只后,可能流行动物鼠疫。     

倍蚤属二新亚种(蚤目:角叶蚤科)

最近我们在整理倍蚤属的跳蚤标本时,发现二个新的地区亚种,分述如下。1.卷带倍蚤巴东亚种 Amphalius spirataenius badongensis Ji,Chen et Wang, 新亚种(图1—4) 鉴别特征 与指名亚种的主要区别在于抱器可动突上无刺或亚刺鬃,阳茎内突端附器卷曲成外圈,第9腹板腱和阳茎腱相应卷曲成6圈。第7腹板后缘凹窦较浅,亚后缘有弱角化区,第8背板后腹缘的鬃呈一半放射状。     

青海省寄生于有蹄类的蠕形蚤

目前,在青海省已发现寄生于有蹄类的蠕形蚤3属8种和亚种,其中有4新种和亚种,是我国蠕形蚤最多的省份。蠕形蚤是危害家畜和其它有蹄类动物的主要害虫之一,应采取有效措施予以预防。     

二毫新蚤的分类研究（蚤目：多毛蚤科）

本文报告二毫新蚤Neopsylla biseta一新亚种二毫新蚤碧江亚种N.biseta bijiangensis ssp.n.,首次记述二毫新蚤绒鼠亚种新组合N:biseta eleusina(Li,1980)comb.n.的雄性,并重新描述二毫新蚤指名亚种N.biseta biseta Li et Hsieh,1964的雌性。     

纤蚤属一新种及一新纪录（蚤目：多毛蚤科）

本文报道纤蚤属１９１２ １新种及１新纪录：蔡氏纤蚤和五侧纤蚤似邻近亚种。     

朝鲜叉蚤一新亚种记述：（蚤目：多毛蚤科）

本文记述了采自湖北省神农架林区叉蚤属Ｄｏｒａｔｏｐｓｙｌｌａ的一新亚种,命名为朝鲜叉蚤湖北亚种,新亚种Ｄｏｒａｔｏｐｓｙｌｌａ ｃｏｒｅａｎａ ｈｕｂｅｉｅｎｓｉｓ ｓｓｐ．ｎｏｖ．标本存于湖北省医学科学院寄生虫病研究所。     

青海多毛蚤属一新种记述（蚤目：多毛蚤科）

本文报道多毛蚤属Ｈｙｓｔｒｉｃｈｏｐｓｙｌｌａ的一新种,文贞多毛蚤Ｈ．ｗｅｎｚｈｅｎｉ ｓｐ．ｎｏｖ．,新种与近缘种圆凹多毛蚤Ｈ．ｒｏｔｕｎｄｉｓｉｎｕａｔａ,多刺多毛蚤Ｈ．ｍｕｌｔｉｄｅｎｔａｔａ和尼泊尔的Ｈ．ｓｙｎａｐｔｉｃａ接近而又有明显区别,新种采自青海省同德县的斯氏水麝鼠句Ｃｈｉｍａｒｒｏｇａｌｅ ｓｔｙａｎｉ,标本存青海省地方病防治研究所。     

Recent advances in the study of Kaposi's sarcoma-associated herpesvirus replication and pathogenesis

It has now been over twenty years since a novel herpesviral genome was identified in Kaposi's sarcoma biopsies. Since then, the cumulative research effort by molecular biologists, virologists, clinicians, and epidemiologists alike has led to the extensive characterization of this tumor virus, Kaposi's sarcoma-associated herpesvirus(KSHV; also known as human herpesvirus 8(HHV-8)), and its associated diseases. Here we review the current knowledge of KSHV biology and pathogenesis, with a particular emphasis on new and exciting advances in the field of epigenetics. We also discuss the development and practicality of various cell culture and animal model systems to study KSHV replication and pathogenesis.     

The structure, reproduction and taxonomy of Vidalia and Osmundaria (Rhodophyta, Rhodomelaceae)

Comprises species occurring mostly in subtidal habitats in tropical, subtropical and warm-temperate areas of the world. An analysis of the type species, V. spiralis (Sonder) Lamouroux ex J. Agardh, a species from Australia, establishes basic characters for distinguishing species in the genus. These characters are (1) branching patterns of thalli, (2) flat blades that may be spiralled on their axis, (3) width of the blade, (4) primary or secondary derivation of sterile and fertile branchlets and (5) position of sterile and fertile branchlets on the thalli. Application of the latter two characters provides an important basic method for separation of species into three major groups. Osmundaria , a genus known only in southern Australia, was studied in relation to Vidalia , and its separation from the Vidalia assemblage is not accepted. Species of Vidalia therefore are transferred to the older genus name, Osmundaria. Two new species, Osmundaria papenfussii and Osmundaria oliveae are described from Natal. Confusion in the usage of the epithet, Vidalia fimbriala Brown ex Turner has been clarified, and Vidalia gregaria Falkenberg, described as an epiphyte on Osmundaria pro/ifera Lamouroux, is revealed to be young branches of the host, Osmundaria prolifera.     

New or rare chromosome counts in Artemisia L. (Asteraceae, Anthemideae) and related genera from Kazakhstan

Fifteen chromosome counts of six Artemisia taxa and one species of each of the genera Brachanthemum, Hippolytia, Kaschgaria, Lepidolopsis and Turaniphytum are reported from Kazakhstan. Three of them are new reports, two are not consistent with previous counts and the remainder are confirmations of very scarce (one to four) earlier records. All the populations studied have the same basic chromosome number, x = 9, with ploidy levels ranging from 2x to 6x. Some correlations between ploidy level, morphological characters and distribution are noted.     

肝癌中HBV和HCV基因和抗原的分布及意义

采用原位分子杂交方法检测HCV RNA及HBV X基因;采用免疫组织化学方法研究HCV核心抗原,非结构区C33c抗原及HBxAg在肝细胞肝癌中的定位及分布.结果表明(1)HCV RNA、HBV X基因在肝细胞肝癌组织检出率分别为40%(55/136)和82%(112/136).HCV RNA定位于癌细胞的胞浆内,阳性细胞呈散在、灶状及弥漫分布三种形式;HBV X基因在肝癌细胞中的分布呈胞浆型、核型及核浆型,阳性细胞也呈上述三种分布形式;(2)HCV C33c抗原、核心抗原在肝细胞肝癌中的阳性率为81%(133/164)及86%(141/164).C33c抗原定位于癌细胞及肝细胞的胞浆内;核心抗原既定位于癌细胞核中,又可定位于胞浆中.C33c抗原阳性细胞以灶状分布为主;而核心抗原阳性细     

Selection with two alleles and complete dominance

For a plant selection model with frequency-independent viabilities, fertilities and selfing rates, it is shown that apart from global fixation, for certain parameter combinations a protected polymorphism and facultative fixation (either allele may become fixed according to initial frequencies) may both occur. Facultative fixation requires different selling rates for the dominant and recessive type. Protection of the polymorphism requires resource allocation for male and female function. In this connection the problem of purely genetically caused population extinction is discussed.
For general frequency dependence and regular segregation, the chances for establishment of a completely recessive gene are compared to those of a completely dominant gene. It is proven that the process of establishment of the recessive gene, despite a fitness advantage, may be considerably endangered by drift effects if random mating prevails. The recessive gene may reach the same effectivity in establishment as a dominant gene, only if the recessive homozygote mates exclusively with its own type during the period of establishment.