共查询到20条相似文献,搜索用时 46 毫秒
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1临床资料 患者女,29岁.6个月前无明显诱因其右侧腰部出现一黄豆大暗红色结节,触之较硬,表面逐渐出现结痂,无糜烂、渗液,未予治疗.皮疹逐渐增大,并在左右两侧腰部又相继出现多个类似结节,结节破溃并渗出脓液,伴轻微痒、痛.在外院行皮肤活检,拟诊“疣状皮肤结核”,抗酸染色阴性.于2011年1月10日来我科就诊.自发病以来无发热、胸腹疼痛及关节疼痛等不适.既往体健,否认结核、肝炎等传染病史及外伤史.各系统检查未见明显异常.皮肤科情况:双侧腰部可见多个散在分布的暗红色结节,黄豆至蚕豆大,界清,质稍硬,表面有少许鳞屑,部分破溃并可挤出脓液(见图1). 相似文献
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皮肤型孢子丝菌病316例临床分析 总被引:3,自引:1,他引:3
目的探讨孢子丝菌病的临床特征及病理特点,指导临床实践。方法分析1972~2007年间就诊于我院的孢子丝菌病447例,其中有详细资料者316例,做皮肤组织病理检查的203例中,105例做了PAS染色检查。结果春季发病者占50.34%,临床分型以固定型略多(52.53%)。儿童主要以面部发病。主要病理改变为混合细胞性肉芽肿。PAS染色阳性率为38.1%。结论孢子丝菌病常年皆可发病,近几年有增多的趋势,春季为本病高发季节。儿童皮损主要在面部,多为固定型。病理改变多为混合细胞性肉芽肿。病理切片、PAS染色诊断阳性率不高,确诊主要靠真菌培养。 相似文献
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目的观察申克孢子丝菌菌丝相向酵母相转化的形态学变化并初步研究连续传代后菌株转化为酵母相的百分率。方法将95株申克孢子丝菌临床株于脑心浸液琼脂培养基上连续传代至酵母相,利用显微镜及血细胞计数板计数菌丝和孢子比例并记录显微镜下形态。结果 95株申克孢子丝菌中,经1次传代即成功转化有23株,经2次传代有14株,经3次传代有10株,经4次传代有6株,4次传代后总计55.8%实验菌株转化为酵母相。结论部分申克孢子丝菌由菌丝相向酵母相转化需经过连续多次传代,连续传代增加了菌丝相至酵母相的转化率。 相似文献
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In experiments on Black Sea skates (Raja clavata), the potential of the receptor epithelium of the ampullae of Lorenzini and spike activity of single nerve fibers connected to them were investigated during electrical and temperature stimulation. Usually the potential within the canal was between 0 and –2 mV, and the input resistance of the ampulla 250–400 k. Heating of the region of the receptor epithelium was accompanied by a negative wave of potential, an increase in input resistance, and inhibition of spike activity. With worsening of the animal's condition the transepithelial potential became positive (up to +10 mV) but the input resistance of the ampulla during stimulation with a positive current was nonlinear in some cases: a regenerative spike of positive polarity appeared in the channel. During heating, the spike response was sometimes reversed in sign. It is suggested that fluctuations of the transepithelial potential and spike responses to temperature stimulation reflect changes in the potential difference on the basal membrane of the receptor cells, which is described by a relationship of the Nernst's or Goldman's equation type.I. P. Pavlov Institute of Physiology, Academy of Sciences of the USSR, Leningrad. I. M. Sechenov, Institute of Evolutionary Physiology and Biochemistry, Academy of Sciences of the USSR, Leningrad. Pacific Institute of Oceanology, Far Eastern Scientific Center, Academy of Sciences of the USSR, Vladivostok. Translated from Neirofiziologiya, Vol. 12, No. 1, pp. 67–74, January–February, 1980. 相似文献
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N. P. Vesselkin Yu. V. Natochin 《Journal of Evolutionary Biochemistry and Physiology》2010,46(6):592-603
Evolution of living organisms is closely connected with evolution of structure of the system of regulations and its mechanisms.
The functional ground of regulations is chemical signalization. As early as in unicellular organisms there is a set of signal
mechanisms providing their life activity and orientation in space and time. Subsequent evolution of ways of chemical signalization
followed the way of development of delivery pathways of chemical signal and development of mechanisms of its regulation. The
mechanism of chemical regulation of the signal interaction is discussed by the example of the specialized system of transduction
of signal from neuron to neuron, of effect of hormone on the epithelial cell and modulation of this effect. These mechanisms
are considered as the most important ways of the fine and precise adaptation of chemical signalization underlying functioning
of physiological systems and organs of the living organism 相似文献