共查询到19条相似文献，搜索用时 375 毫秒
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从武隆县巷口镇凤山鸡场2013年10月送检的病鸡小肠中采集绦虫,将采集到的绦虫制成标本,然后在显微镜下观察,并根据绦虫虫体长度,吻钩数目以及虫体、头节、吻钩、节片的形态特征鉴定绦虫的种类。结果显示,在采集的绦虫样本中,1份为膜壳科柴壳属绦虫,1份为膜壳科网宫属绦虫,3份为膜壳科微吻属绦虫。结果表明：武隆某鸡场鸡感染绦虫为混合感染,感染膜壳科微吻属绦虫的机率最大。建议该鸡场使用吡喹酮等药物进行治疗。 相似文献
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<正> 国内外学者对鸭绦虫的形态学报导较少,作者在进行鄱阳湖绿头野鸭寄生蠕虫的调查过程中,对鸭的膜壳绦虫的形态作了比较详细的观察,为了便于鉴定,从加强整体直观概念出发,描绘了绦虫不同形状的各种节片图,现将我省未报道的三种膜壳绦虫的 相似文献
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从临床症状、组织病理学变化、病原形态学鉴定等方面对一起鸡棘沟赖利绦虫病进行诊断。结果表明,病鸡生长缓慢,消化道增粗、肿大,肠内充满大量黄褐色液体。十二指肠有凸起的白色结节和散在出血斑,HE染色显示肠黏膜层脱落并伴有大量红细胞浸润。病鸡十二指肠、空肠和回肠发现大量绦虫虫体,体长5cm~10cm,头节四周有4个圆形吸盘,中央有1个突起的顶突,顶突上分布有两圈小钩。颈节节片生殖系统未发育成熟,染色不明显。成节节片有一组生殖系统,生殖孔交替开口于节片外缘上1/3处。雄茎囊位于排泄孔外侧,睾丸数目30个~40个。孕节子宫退化,被大量卵囊所取代,散在分布于节片中,每个卵囊内有1个已胚化的六钩蚴。综合以上结果判定病鸡所患寄生虫病为棘沟赖利绦虫病。 相似文献
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为了解小型绦虫的最佳染色方法及膜壳属绦虫的形态结构,采用4%孔雀绿水溶液、欧氏苏木素溶液、德氏苏木素溶液、7%醋酸卡红溶液、明矾卡红、硼酸卡红、盐酸卡红、明矾品红、伊红、红墨水、蓝墨水、黑墨水稀释液共12种染色液制作鸡膜壳绦虫的染色标本,观察其结构特征。结果表明,采用蓝墨水和红墨水染色简便快捷、着色均匀、结构清晰、颜色鲜亮。膜壳属绦虫的未成熟体节可见着色深的雄性生殖器官,每个成熟体节可见一个生殖孔,开口于节片的单侧,孕卵体节可见子宫;染色结果丰富了膜壳属绦虫的形态学资料。小型绦虫使用改进的染色法制片步骤简化、效果好。 相似文献
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《黑龙江畜牧兽医》2016,(21)
为了研究额尔齐斯河鱼类肠道寄生的宽头鲤蠢绦虫(Caryophyllaeus laticeps)种类及流行特点,试验采用形态学和分子生物学相结合的方法鉴定虫种,并对额尔齐斯河鱼类8次采样获得的数据进行统计分析。结果表明:依靠形态学观察可知虫体不分节,头节宽大,体末端有"H"状卵巢,初步鉴定为鲤蠢绦虫属种类;通过扩增线粒体细胞色素c氧化酶第1亚基(cox1)序列,发现该虫与Gen Bank上公布的宽头鲤蠢绦虫的线粒体cox1序列的相似性为97.56%(639/655),为同一种。被宽头鲤蠢绦虫感染的5种鱼中,散鳞镜鲤的感染率最高(为16.67%),感染强度最低(为1);东方欧鳊的感染率、感染强度均高,分别为15.27%和14;银鲫的感染率最低,为3.28%。说明本试验采用的方法能够准确鉴定虫种;东方欧鳊感染宽头鲤蠢绦虫的情况最严重,且体长段适中的东方欧鳊更易感染宽头鲤蠢绦虫。 相似文献
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分子生物学技术具有操作简便、特异性强等优点,弥补了传统形态学分类方法的不足,因此分子水平的分类为棘球属绦虫种、株的鉴定提供了一种强有力的手段。文章介绍了线粒体基因(cox1、nad1、cob等)、核糖体基因应用于棘球绦虫分子分类的研究进展。 相似文献
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为了解野生树鼩的寄生虫感染状况,剖检昆明市西郊野外捕获的3只树鼩（雄性1只、雌性2只）后进行寄生虫检查。结果显示,雌性树鼩的体表和体内均未检出寄生虫,在雄性树鼩的肠道发现严重绦虫感染,共检出虫体16条,经鉴定为长膜壳绦虫（Hymenolepis diminuta）,绦虫总重量为3.4 g,占该树鼩体重的3.6%。 相似文献
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The Asian fish tapeworm Bothriocephalus acheilognathi (Cestoda: Bothriocephalidea) is an introduced fish parasite in the southwestern United States and is often considered a serious threat to native desert fishes. Determining the geographic distribution of nonnative fish parasites is important for recovery efforts of native fishes. We examined 1,140 individuals belonging to nine fish species from southwestern U.S. streams and springs between January 2005 and April 2007. The Asian fish tapeworm was present in the Gila River, Salt River, Verde River, San Pedro River, Aravaipa Creek, and Fossil Creek, Arizona, and in Lake Tuendae at Zzyzx Springs and Afton Canyon of the Mojave River, California. Overall prevalence of the Asian fish tapeworm in Arizona fish populations was 19% (range = 0-100%) and varied by location, time, and fish species. In California, the prevalence, abundance, and intensity of the Asian fish tapeworm in Mohave tui chub Gila bicolor mohavensis were higher during warmer months than during cooler months. Three new definitive host species--Yaqui chub G. purpurea, headwater chub G. nigra, and longfin dace agosia chrysogaster--were identified. Widespread occurrence of the Asian fish tapeworm in southwestern U.S. waters suggests that the lack of detection in other systems where nonnative fishes occur is due to a lack of effort as opposed to true absence of the parasite. To limit further spread of diseases to small, isolated systems, we recommend treatment for both endo- and exoparasites when management actions include translocation of fishes. 相似文献
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Free-living waterfowl residing in metropolitan parks in central Ohio were surveyed for the fecal shedding and antimicrobial susceptibility patterns of Campylobacter jejuni, Escherichia coli, Salmonella spp., and Pasteurella multocida. In addition, a survey for intestinal parasites was also conducted in these same waterfowl to determine parasite burdens in free-living waterfowl. Prevalences of 67%, 50%, and 0.2% of E. coli, C. jejuni, and Salmonella spp., respectively, were observed for all waterfowl species. Pasteurella multocida was not isolated from the sampled population. Salmonella java was isolated from one mallard duck. Statistically, there was a significantly higher E. coli isolation rate for mallard ducks than for Canada geese, but no difference was observed for C. jejuni isolation rates between waterfowl species. Antimicrobial susceptibility testing was conducted via the disk diffusion method and multidrug resistance was exhibited for penicillin G, lincomycin, vancomycin, erythromycin, and bacitracin. In addition, the prevalence of endoparasites in these sampled waterfowl ranged from 5% to 66%. Protozoan oocysts were most prevalent followed by nematode ova. No trematode or cestode ovum was recovered from this sampled population. 相似文献
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Cacciò SM Antunovic B Moretti A Mangili V Marinculic A Baric RR Slemenda SB Pieniazek NJ 《Veterinary parasitology》2002,106(4):285-292
The morphologically small Babesia species isolated from naturally infected dogs in Europe, Japan, and US are described as Babesia gibsoni despite the fact that molecular techniques show that they should be assigned to two or three separate taxons. The morphologically large Babesia isolated from dogs in Europe, Africa, and US were generally classified as B. canis until it was proposed to distinguish three related, albeit genetically distinct subspecies of this genus, namely B. canis canis, B. canis rossi, and B. canis vogeli. The insight into the molecular taxonomy of canine piroplasms is, however, limited because only partial small subunit ribosomal RNA (ssrRNA) sequence data exist for two species from the B. canis group. In this work, we molecularly characterised natural Babesia infections in 11 dogs from Croatia, France, Italy, and Poland. These infections were diagnosed as caused by B. canis canis and B. canis vogeli based on the analysis of the complete sequence of the ssrRNA genes. Phylogenetic analysis confirmed that the large Babesia species of dogs belong the to the Babesia sensu stricto clade, which includes species characterised by transovarial transmission in the tick vectors and by exclusive development inside the mammalian host erythrocytes. The new data facilitate the reliable molecular diagnosis of the subspecies of B. canis. 相似文献
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家蚕灰僵病病原的鉴定 总被引：2，自引：0，他引：2
家蚕灰僵病(grey muscardine)是一类不常见的真菌病,其病原一直未能确定。从感染灰僵病的家蚕体中分离获得一株棒束孢(Isaria),菌株编号为RCEF197,测定了该菌株的ITS1-5.8S-ITS2 rDNA区域序列,研究了该菌株的菌落和显微形态特征。与一些近似的棒束孢和拟青霉(Paecilomyces)的ITS序列进行比较,该菌株和爪哇棒束孢菌株CBS134.22的相似性为99.8%,在构建的棒束孢属部分种的系统发育树中,该菌株与爪哇棒束孢聚为一类,再结合该菌株具有的淡灰紫色菌落和长椭圆形分生孢子大小等形态学特征,将家蚕灰僵病的病原确定为爪哇棒束孢Isaria javanica。 相似文献
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IG Langstaff JS McKenzie WL Stanislawek CEM Reed R Poland SC Cork 《New Zealand veterinary journal》2013,61(3):160-165
AIM: To determine if migratory birds arriving in New Zealand in the Southern Hemisphere spring of 2004 were infected with the highly pathogenic avian influenza (AI) virus, H5N1. METHODS: Cloacal and faecal samples were collected from migratory red knots following their arrival in New Zealand in October 2004. Two species of resident sympatric birds, wrybill and mallard duck, were sampled prior to, and following, the arrival of migratory birds. RESULTS: No AI viruses were isolated from migratory or resident shorebirds. Non-pathogenic AI viruses were isolated from six resident mallard ducks, comprising the endemic subtypes H4 (n=2), H7 (non-pathogenic), H10, and H11 (n=2). CONCLUSIONS: Highly pathogenic AI H5N1 virus was not detected in migratory shorebirds or sympatric water birds in the Firth of Thames, New Zealand, in 2004-2005, despite the possible proximity of migratory birds to outbreaks of the disease in East Asia in 2004. 相似文献
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Vokřál I Jirásko R Jedličková V Bártíková H Skálová L Lamka J Holčapek M Szotáková B 《Veterinary parasitology》2012,185(2-4):168-174
Biotransformation enzymes can, to a certain extent, protect parasitic worms against the toxic effects of anthelmintics and can contribute to drug-resistance development. The objective of our work was (1) to find and identify phase I and II metabolites of the anthelmintic praziquantel (PZQ) formed by the lancet fluke (Dicrocoelium dendriticum) and the rat tapeworm (Hymenolepis diminuta) and (2) to compare PZQ metabolites in helminths with PZQ biotransformation in rat as host species. Ultra high performance liquid chromatography/tandem mass spectrometry (UHPLC/MS/MS) was used for this purpose. During in vitro incubations, mitochondria-like and microsomes-like fractions (prepared from homogenates of adult worms or from rat liver homogenate) were incubated with 10 and 100 μM PZQ. Liquid/liquid extraction was used for samples during in vitro experiments. In the ex vivo study, living D. dendriticum and H. diminuta adults were incubated in RPMI-1640 medium in the presence of 50 nM or 100 nM PZQ for 24h. After incubation, the worms were removed from the medium and homogenized. Homogenates of worms, medium from the incubation of worms or rat hepatocytes and rat urine (collected during 24h after oral PZQ administration) were separately extracted using solid-phase extraction. The results showed that both D. dendriticum and H. diminuta enzymatic systems are not able to metabolize PZQ. On the other hand, thirty one different phase I and four phase II PZQ metabolites were detected in rat samples using UHPLC/MS/MS analyses. These results show that our experimental helminths, as the members of tapeworm and fluke groups of parasites, are not able to deactivate PZQ, and that the biotransformation enzymes of the studied helminths do not contribute to PZQ-resistance. 相似文献
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Many studies indicated that small mammals are important reservoirs for Bartonella species. Using molecular methods, several studies have documented that bats could harbor Bartonella. This study was conducted to investigate the relationship of Bartonella spp. identified in bats and small mammals living in the same ecological environment. During May 2009 and March 2010, a total of 102 blood specimens were collected. By whole blood culture and molecular identification, a total of 6 bats, 1 rodent and 9 shrews were shown to be infected by Bartonella species. After sequencing and phylogenetic analyses of the sequences of gltA, ftsZ, rpoB and ribC genes, these specific isolates from bats were not similar to the known Bartonella species (the similarity values were less than 91.2%, 90.5%, 88.8%, and 82.2%, respectively); these isolates formed an independent clade away from other known Bartonella type strains. The Bartonella spp. isolated from small mammals, which were closely related to Bartonella tribocorum, Bartonella elizabethae, Bartonella grahamii, Bartonella rattimassiliensis and Bartonella queenslandensis, were similar to the findings in previous studies worldwide. Therefore, the results implied that the species of Bartonella strains isolated from small mammals were different from those identified in bats. Our results strongly suggested that the bat isolate could be a new Bartonella species. This study is also the first one to isolate Bartonella organisms from Asian gray shrews, Crocidura attenuata tanakae. 相似文献
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为了解我国部分地区羊肠道寄生虫的感染情况,采用水洗离心沉淀法、卢戈氏碘液染色法和饱和蔗糖溶液漂浮法,对来自全国8省16个地区共472份羊粪样品进行了肠道寄生虫的显微镜检查,并根据虫卵和卵囊形态进行了虫种鉴定。本次调查寄生虫总感染率为85.38%(403/472),混合感染率为46.40%(219/472),共查到球虫、阿米巴、线虫和绦虫4大类寄生虫,感染率分别为68.86%(325/472)、44.49%(210/472)、29.24%(138/472)和1.91%(9/472)。球虫种类鉴定结果显示共10种,分别为阿氏艾美耳球虫(Eimeri arloingi)、艾丽艾美耳球虫(Eimeri alijevi)、苍白艾美耳球虫(Eimeri pallida)、家山羊艾美耳球虫(Eimeri hirci)、山羊艾美耳球虫(Eimeri caprina)、阿撒他艾美耳球虫(Eimeri ahsata)、斑点艾美耳球虫(Eimeri punctata)、羊艾美耳球虫(Eimeri caprovina)、颗粒艾美耳球虫(Eimeri granulosa)和克氏艾美耳球虫(Eimeri christenseni);线虫共4种,分别为类圆线虫(Strongyloides spp)、毛首线虫(Trichuris spp)、毛细线虫(Capillaria spp)和细颈线虫(Nematodirus spp);绦虫为扩展莫尼茨绦虫(Moniezia expansa)。结论:我国部分地区羊肠道寄生虫在春夏季节感染较为普遍,其中球虫感染率最高,为优势虫种。本调查为羊场精准驱虫提供了参考依据。 相似文献