青海省纤恙螨属三新种（蜱螨亚纲：恙螨科）

本文描述采自青海的纤恙螨属Ｌｅｐｔｏｔｒｏｍｂｉｄｉｕｍ Ｎａｇａｙｏ ｅｔ ａｌ,１９１６,三个新种;巴颜纤恙螨Ｌ．（Ｌ．）ｂａｙａｎｅｎｓｉｓ ｓｐ．ｎｏｖ。,川纤恙螨Ｌ．（Ｌ．）ｈｕａｎｇｃｈｕａｎｅｎｓｉｓ ｓｐ．ｎｏｖ．,乌兰纤恙螨Ｌ．（Ｌ．）ｗｕｌａｎｅｎｓｉｓ ｓｐ．ｎｏｖ．模式标本均保存在青海省地方病防治研究所。     

春川恙螨属一新种：蜱螨亚纲：恙螨科

本文描述春川恙螨属Ｓｈｕｎｓｅｎｎｉａ Ｊａｍｅｓｏｎ ｅｔ Ｔｏｓｈｉｏｋａ一新种,即叉毛春川恙螨Ｓ．ｆｕｒｃｏｓｅｔａ ｓｐ．ｎｏｖ．,模式标本采自青海省化隆回簇自治区的大林姬鼠Ａｐｏｄｅｍｕｓ ｓｐｅｃｉｏｓｕｓ Ｔｅｍｍｉｎｃｋ,１８４５体长,文内量度单位均为μｍ。标本存放在青海省地方病防治研究所。     

春川恙螨属—新种(蜱螨亚纲:恙螨科)

本文描述春川恙螨属ＳｈｕｎｓｅｎｎｉａＪａｍｅｓｏｎｅｔＴｏｓｈｉｏｋａ一新种,即叉毛春川恙螨Ｓ．ｆｕｒｃｏｓｅｔａｓｐ．ｎｏｖ．,模式标本采自青海省化隆回族自治县的大林姬鼠ＡｐｏｄｅｍｕｓｓｐｅｃｉｏｓｕｓＴｅｍｍｉｎｃｋ,１８４５体长,文内量度单位均为μｍ。标本存放在青海省地方病防治研究所。     

纤恙螨属恙螨一新种：蜱螨亚纲：恙螨科

从采自新疆博乐县阿拉山口(海拔290 m)室内灰仓鼠伏龙芝亚种 Cricetulus migratorius caesius耳壳内的一批纤恙螨标本鉴定中发现中国新记录亚属——爱柯纤恙螨亚属 Ericotrombidium中的一个新种,定名为博乐纤恙螨 Leptotrombidium (E.) bolei sp.nov.,它与美丽纤恙螨L.(E.)pulchrum(Sosnina,1950)及索氏纤恙螨L.(E.)sokolovi Kudryshova,1984比较近似,但本新种IP及盾板量度除 AM外均较大,PW-SB≥PL,可与前者区别;IP较小,平均787,幅度763—821,DS较少,排列规则:2+8.6.6.4.2=28,可与后者区别。     

纤恙螨属一新种（蜱螨亚纲：恙螨科）

本文描述纤恙螨属,１９１６,一新种,五角纤恙螨,标本采自青海省玉树藏族自治州称多县。     

青海恙螨亚科三新种：蜱螨亚纲：恙螨科

本文记述了恙螨亚科Trombiculinae Ewing 1929的三个新种:1.球形钳齿恙螨,新种,Cheladonta globosea sp.nov..2.久治真棒恙螨,新种,Euschoengastia jiuzhiensis sp.nov.3.民和囊棒恙螨,新种Ascoschoengastia minheensis sp.nov.,分别采自青海省久治县、化隆县、民和县和互助县。     

无前恙螨属二新种(蜱螨目:恙螨科)

本描述了采自江苏黑线姬鼠体上的无前恙螨属二新种,即长盾无前恙螨Walchia(Walchia)longiscuta Xia et Chen,sp．nov．和孟氏无前恙螨Walchia(Walchia)meni Xiaet Chen,sp．nov．。模式标本保存于复旦大学上海医学院寄生虫学教研室。     

纤恙螨属一新种(蜱螨亚纲,恙螨科)

记述纤恙螨属Leptotrombidium Nagayo et al．,1916 1新种,即尖扎纤恙螨Leptotrombidium(L．) jianzhaensis sp．nov．,标本采自青海省黄南州尖扎县坎布拉地区红耳鼠兔Ochotona erythrotis体上。模式标本存放在青海省地方病预防控制所。文内量度单位均为μm。     

昆明西山纤恙螨一新种：真螨目：恙螨科

1958年在昆明西山采得1种恙螨,经鉴定系1新种,定名为昆西纤恙螨,标本保存在昆明军事医学研究所。昆西纤恙螨Leptotrombidlum(L.)kunxi Xiang et Wen,新种(图1-6) 标本:正模、幼虫,昆明西山,海拔2110m,1958-Ⅸ-26,向容炯、陈祖武采,宿主为普通树鼩中华亚种Tupaia glis chinenis,寄生在肛门周围。 鉴别:本新种与纤恙螨属的Leptotrombidium(L.)pesudofulmentum V.-G.et     

犹棒螨属一新种记述（蝉螨亚纲：恙螨科）

本文记述恙螨亚科ＴｒｏｍｂｉｃｕｌｉｎａｅＥｗｉｎｇ,犹棒螨属ＥｕｓｃｈｏｅｎｇａｓｔｉａＥｗｉｎｇ,祁连犹棒恙螨,新种Ｅｕｓｃｈｏｅｎｇａｓｔｉａｑｉｌｉａｎｅｎｓｉｓｓｐ．ｎｏｖ,采自青海省祁连县。模式标本保存在青海省地方病防治研究所。     

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.     

杆状病毒出芽病毒粒子膜融合蛋白的研究进展

杆状病毒是一类感染节肢动物的病原微生物,其基因组为双链环状DNA,大小为80～180kb.     

Inception of the Modern Public Health System in China and Perspectives for Effective Control of Emerging Infectious Diseases: In Commemoration of the 140th Anniversary of the Birth of the Plague Fighter Dr. Wu Lien-Teh

In this article, we systematically review Dr. Wu Lien-Teh's academic achievements and outstanding contributions in the prevention and control of the plague epidemic in northeast China and introduce the development of the earliest public health epidemic prevention system in China in order to commemorate the 140th anniversary of Dr. Wu Lien-Teh's birth. We hope that this article will provide insights into the effective prevention and control of emerging infectious diseases as well as the current worldwide pandemic of COVID-19, facilitating the improvement and development of public health systems in China and around the globe.