共查询到14条相似文献，搜索用时 171 毫秒
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合肥地区犬隐孢子虫病流行病学调查 总被引：1，自引：1，他引：0
为了查明合肥地区犬隐孢子虫感染情况,对该地区232只犬进行了隐孢子虫感染情况的调查,结果在24只犬的粪样中查到了隐孢子虫卵囊,其感染率为10.34%(24/232).对不同调查点、不同年龄段的犬隐孢子虫感染率与感染强度进行统计分析后发现,采样地点不同,犬隐孢子虫的感染率有所不同;犬隐孢子虫的感染率存在年龄差异,年龄越小,感染率越高;成年犬的感染强度则较强.经形态学鉴定,所获虫体为微小隐孢子虫(Cryptosporidium parvum). 相似文献
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张佑洁 《闽西职业技术学院学报》2000,(3)
隐孢子虫是一种重要的人畜共患寄生虫，不仅是人畜腹泻的重要病原之一，还与艾滋病的发生流行有关。隐孢子虫的宿主范围很广，除人体外，还可寄生于猪、牛、禽、鼠、鱼、蛇等 44种动物的消化道和呼吸道上皮细胞表面，引起以腹泻为主要特征的临床症状；隐孢子虫的生活史周期为 3－ 8d，均在同一宿主内完成，典型的卵囊特征为卵园形，内含 4个子孢子和一个园形的残体；目前世界上有报道 22个种。但已公认的为 6个种，其中鼠隐孢子虫、微小隐孢子虫、火鸡隐孢子虫和贝氏隐孢子虫在我国已见报道；实验室检查方法常用粪便漂浮法和病变组织触片染色法，染色方法以金胺酚染色和改良抗酸染色较佳。目前尚无特效药治疗隐孢子虫病。临床上用盐霉素和大蒜素，配合复方新诺明、多酶片等辅助疗法有一定疗效。 相似文献
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隐孢子虫的生物学特性及防治 总被引：1，自引：0，他引：1
张佑洁 《闽西职业大学学报》2000,(3):52-52,57
隐孢子虫是一种重要的人畜共患寄生虫,不仅是人畜腹泻的重要病原之一,还与艾滋病的发生流行有关。隐孢子虫的宿主范围很广,除人体外,还可寄生于猪、牛、禽、鼠、鱼、蛇等44种动物的消化道和呼吸道上皮细胞表面,引起以腹泻为主要特征的临床症状;隐孢子虫的生活史周期为3－8d,均在同一宿主内完成,典型的卵囊特征为卵园形,内含4个子孢子和一个园形的残体;目前世界上有报道22个种。但已公认的为6个种,其中鼠隐孢子虫、微小隐孢子虫、火鸡隐孢子虫和贝氏隐孢子虫在我国已见报道;实验室检查方法常用粪便漂浮法和病变组织触片染色法,染色方法以金胺酚染色和改良抗酸染色较佳。目前尚无特效药治疗隐孢子虫病。临床上用盐霉素和大蒜素,配合复方新诺明、多酶片等辅助疗法有一定疗效。 相似文献
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对皖北地区的利辛、界首、泗县、风阳四县564头犊牛用饱和食盐水漂浮法进行粪便检查,发现有252头感染丁犊牛新蛔虫,其感染率为44.68%,表现该病症状的有102头,死亡22头,病死率为21.57%.粪便检查中最早发现新蛔虫卵的为l6日龄;各县间阳性率(感染率)差异不显著,而日龄间感染率差异极显著. 相似文献
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皖浙两省宠物犬肠道寄生虫病感染情况调查 总被引：1，自引：0，他引：1
为了解皖浙两省宠物犬肠道寄生虫感染情况,采用饱和蔗糖漂浮法和水洗沉淀法对两省不同地区宠物犬肠道寄生虫感染情况进行粪便学调查。结果发现肠道寄生虫总感染率为27.94%,以等孢球虫、钩虫和犬弓首蛔虫为主要感染虫种,感染率分别为6.98%,8.57%和4.76%。315份粪便样品中8份为混合感染,混合感染率2.54%。结果表明,皖浙两省宠物犬肠道寄生虫感染率较低,但存在多种人兽共患寄生虫,因此应加强宠物犬肠道寄生虫病的综合防控。 相似文献
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高邮市家鹅球虫种类的调查与鉴定 总被引：2，自引：0，他引：2
采用卵囊形态结构特征观察与回归动物试验相结合的方法,对江苏省高邮市家鹅感染球虫的种类进行了调查与鉴定.共查16个鹅群,球虫阳性16群,阳性率为100%.共检到1科2属6种球虫,其中艾美耳属(Eimeria)5种:鹅艾美耳球虫(E.anseris)、棕黄艾美耳球虫(E.fulva)、赫曼艾美耳球虫(E.her-mani)、有害艾美耳球虫(E.nocens)和多斑艾美耳球虫(E.stigmosa);泰泽属(Tyzzeria)1种:稍小泰泽球虫(T. parvula).稍小泰泽球虫检出率最高(100%,16/16),其次是赫氏艾美耳球虫(50.0%,8/16),为本次调查的优势种. 相似文献
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地瓜儿可溶性糖和还原糖的含量测定 总被引：1，自引：0，他引：1
陈克克 《西安文理学院学报》2009,12(1):39-42
以唇形科多年生草本植物地瓜儿苗的地下部分根茎地瓜儿为材料,研究地瓜儿的可溶性糖、还原糖的含量．采用苯酚法测定可溶性糖的含量,以蔗糖为对照品建立标准曲线,测得地瓜儿可溶性糖的含量是0．553％;采用斐林试剂比色法测定还原糖的含量,以葡萄糖为对照品建立标准曲线,测得地瓜儿还原糖的含量是0．825％． 相似文献
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目前我国选煤厂浮选流程大多采用直接浮选和浓缩浮选,本文根据桃山选煤厂的生产实际,对直接浮选与浓缩浮选生产的工艺效果进行了对比分析. 相似文献
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通过工程实例的对比分析,介绍了机械行业含油废水处理中,气浮和絮凝沉淀技术的应用特点,气浮技术具有占地面积小、污泥产量少的优点,絮凝沉淀技术则具有运行稳定、操作简单的优势。进一步总结出了两种处理工艺的选择原则。 相似文献
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Daniela Sellmann Valerie Beckmann Sarah Panzlaff Susanne Menzel 《Environmental Education Research》2019,25(1):92-114
Zoo educators are important communicators of the targets in education for sustainable development and therefore carry great responsibility for global environmental change. However, German zoo educators form a heterogeneous group, many of them working in non-permanent job positions and facing multiple challenges at work. Applying the job demands-resources model, our study aims at revealing factors influencing zoo educators’ job strain. Our data from eight in-depth interviews with German zoo educators confirm that they perceive common factors known from other studies, such as demands (e.g. workload) and resources (e.g. supervisory support). Besides this, job-specific factors were identified (e.g. working with humans and animals). The demands zoo educators mentioned could be classified either as job hindrances (e.g. lack of equipment) or job challenges (e.g. learning). Future studies should quantify these results to facilitate the development of appropriate measures to reduce educators’ job strain, thus enhancing their performance. 相似文献
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Patricia Patrick Cathy Mathews Sue Dale Tunnicliffe 《International Journal of Science Education》2013,35(15):2645-2669
This study investigated whether listening to spontaneous conversations of elementary students and their teachers/chaperones, while they were visiting a zoo, affected preservice elementary teachers' conceptions about planning a field trip to the zoo. One hundred five preservice elementary teachers designed field trips prior to and after listening to students' conversations during a field trip to the zoo. In order to analyze the preservice teachers' field trip designs, we conducted a review of the literature on field trips to develop the field trip inventory (FTI). The FTI focussed on three major components of field trips: cognitive, procedural, and social. Cognitive components were subdivided into pre-visit, during-visit, and post-visit activities and problem-solving. Procedural components included information about the informal science education facility (the zoo) and the zoo staff and included advanced organizers. Social components on student groups, fun, control during the zoo visit, and control of student learning. The results of the investigation showed that (a) the dominant topic in conversations among elementary school groups at the zoo was management, (b) procedural components were mentioned least often, (c) preservice teachers described during-visit activities more often than any other characteristic central to field trip design, (d) seven of the nine characteristics listed in the FTI were noted more frequently in the preservice teachers' field trip designs after they listened to students' conversations at the zoo, and (e) preservice teachers thought that students were not learning and that planning was important. 相似文献
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With the number and scope of environmental challenges continuing to increase, an understanding of the effectiveness of conservation programs is essential in order to allocate limited resources. This paper examines the effectiveness of environmental education within a zoo setting, focusing on the role of learners’ identity-related motivation. Results from survey (n = 296) and interview (n = 116) data collected from visitors to the Toronto Zoo suggest that education success is dependent on visitors’ dominant motivation, with preliminary data suggesting that Spiritual Pilgrims and Experience Seekers demonstrate greater gains in knowledge of environmental issues compared with Facilitators. Given that most zoo visitors fell into this Facilitator group, this finding may have an effect on future zoo management decisions. In addition, the proportion of visitors falling into each motivation group was significantly different than those previously found in the United States (p = 0.05), suggesting that zoo education strategies developed internationally may not be directly transferable to the Toronto Zoo. 相似文献
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Salt stress affects the growth and development of plants, which results in a decrease in crop quality and yield. In this study, we used tomato seedlings treated with salt and trehalose as experimental materials and analyzed them using the technique for order preference by similarity to ideal solution analysis to select the optimal trehalose concentration for treatment. We also determined the contents of sugar and abscisic acid(ABA) and detected the expression of genes involved in the metabolism of sugar and ABA by quantitative real-time PCR. Results showed that the optimal trehalose concentration was 2 mmol/L for tomato seedlings under salt stress. Exogenous trehalose decreased the starch content and increased the soluble sugar content by affecting the expression of genes related to the metabolism of starch and soluble sugar. Exogenous trehalose altered the accumulation and distribution of sugar by inducing the upregulation of sugar transporter genes. Furthermore, trehalose increased the ABA content to induce salt stress response by regulating the expression of genes related to the synthesis and metabolism of ABA. In conclusion, trehalose can effectively alleviate salt stress and enhance salt tolerance of tomato. These findings provide a novel perspective and a better resource to investigate the salt tolerance mechanism and a new method for alleviating salt stress in tomato. 相似文献