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1.
副猪嗜血杆菌的分离鉴定及16S rRNA序列分析 总被引：1，自引：1，他引：0
从云南某规模化养猪场病猪肺脏分离到1株革兰氏阴性小杆菌,经细菌生化鉴定、PCR鉴定和16S rRNA序列比对鉴定为副猪嗜血杆菌。抗生素药物敏感试验结果表明,分离菌株对四环素、红霉素、氯霉素、头孢噻吩高敏;对庆大霉素、氧氟沙星、诺氟沙星中敏;对磺胺甲唑耐药。16S rRNA分析结果表明,该分离株与GenBank中的Hps参考株AB078973(基因登录号)同源性为100%,将分离菌株鉴定为副猪嗜血杆菌。16S rRNA遗传进化关系表明,分离株与副猪嗜血杆菌3株血清5型参考株AB078972、AB078973、AB078974的16S rRNA序列位于一个分支上,遗传进化关系最近,它们之间的核苷酸同源性在99.0%~99.4%之间,初步鉴定为血清5型副猪嗜血杆菌,致病性试验结果表明,分离菌株对小白鼠有强致病性,命名为YN-1株。 相似文献
2.
一株副猪嗜血杆菌的分离鉴定及其遗传进化分析 总被引：1，自引：0，他引：1
为确认导致甘肃省平凉市一农场猪群死亡的原因,采集病死猪不同组织样品进行检测,从病死猪的脏器组织中分离到1株革兰阴性杆菌,并对其进行生化鉴定、16S rRNA鉴定及遗传进化分析,同时进行分离菌的致病性试验、耐药性分析、V因子需要试验、"卫星现象"观察。结果表明:分离菌生化特性均符合副猪嗜血杆菌;其16S rRNA基因序列与Genbank中副猪嗜血杆菌株的同源性均高达99%。因此,将该分离菌鉴定为副猪嗜血杆菌,将其命名为PL2016。动物试验及耐药性试验表明,该分离菌具有较强的致病性和多重耐药性。16S rRNA遗传进化分析表明,该分离菌与副猪嗜血杆菌其他菌株具有很高的同源性,其核酸序列相似性高达99%以上。遗传进化分析表明,该分离菌的ompP2、sodA基因与副猪嗜血杆菌其他菌株具有很高的同源性,其核酸序列相似性高达95%以上。 相似文献
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4.
副猪嗜血杆菌的分离鉴定与药敏试验 总被引：6，自引：3，他引：3
对广东15个送检的疑似猪传染性副猪嗜血杆菌病的病猪样品,用TSA培养基进行细菌的分离,并对分离菌株进行细菌的形态观察、培养特性和生化试验鉴定,以及用副猪嗜血杆菌16S rRNA基因的特异性引物进行PCR鉴定。试验结果表明,有7株分离菌株扩增出了821 bp的特异性目的条带,结合形态观察、培养特性和生化试验鉴定,结果表明成功分离到了7株副猪嗜血杆菌;药敏试验结果显示,分离菌株对氨苄西林、多粘菌素、庆大霉素等药物较敏感。 相似文献
5.
《中国家禽》2017,(22)
为了鉴定引起雏鹅死亡病原,无菌采集肝、心、肺等病料组织进行细菌分离培养,通过分离培养、培养特性鉴定、形态学观察、生化试验、16 S rRNA PCR等方法进行鉴定。结果显示:分离菌株16 S rRNA基因序列与GenBank中公布的12株多杀性巴氏杆菌参考株的同源性在98%~100%之间,分离菌株为多杀性巴氏杆菌;动物回归试验结果表明,该菌具有致病性,且致病较强,对雏鹅的LD_(50)为3.16×10~6cfu/mL;PCR检测结果表明,分离菌株属于多杀性巴氏杆菌荚膜型A型,同时携带18个毒力基因;药敏试验结果显示,分离菌对恩诺沙星、丁胺卡那霉素、头孢曲松等11种药物高敏,对其他药物存在不同程度的敏感性。 相似文献
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《中国动物传染病学报》2018,(6)
从流产奶牛胎儿组织中分离到1株革兰氏阴性短杆菌,采用细菌分离纯化、生化试验、16S rRNA和16S～23S rRNA测序、药敏试验和小鼠致死性试验对其进行了鉴定。结果显示,该分离菌与GenBank中肺炎克雷伯氏菌16S rRNA和16S～23S rRNA基因序列一致性分别高达99%和96%,16S～23S rRNA基因被扩增出3条不同长度条带;该菌生化特性均符合肺炎克雷伯氏菌的生化反应特性;对头孢曲松、阿米卡星、多粘菌素等敏感,对多西环素、四环素、卡拉霉素等中度敏感,对青霉素、红霉素、米诺环素等耐药;对小鼠有很强的致病性。以上结果表明,该分离细菌为肺炎克雷伯氏菌。 相似文献
8.
《中国预防兽医学报》2020,(8)
为探究河南省某大型养猪场育肥猪发生疫情的原因,本研究从该猪场采集的病料样品中进行细菌分离,并对分离菌经革兰氏染色及电镜观察其形态、16S rRNA PCR鉴定;采用多重PCR鉴定其血清型并将扩增的funAB基因与GenBank中的其它副猪嗜血杆菌(HPS)参考株的相应基因进行同源性分析并构建该基因的进化树;采用纸片扩散法鉴定分离菌株的药敏特性并利用小鼠进行了其致病性试验。结果显示:经形态观察、培养特性鉴定以及16S rRNA的PCR鉴定,该分离菌为HPS;经多重PCR并经测序鉴定分离菌为14型HPS,将其命名为JZ-2019;funAB基因的同源性分析及进化树结果显示,JZ-2019株与14型HPS IA-84-22113株(KC795520.1)的同源性为100%。药敏试验结果显示,分离菌对β-内酰胺类、大环内酯类以及氨基糖苷类药物敏感,其中对大环内酯类药物最为敏感;小鼠致病性试验结果显示,小鼠均出现临床症状,甚至死亡,且小鼠各脏器组织均出现不同程度的出血等剖检症状;经PCR扩增从死亡小鼠的脑、腹水中扩增出与分离菌株一致的细菌。表明,该分离菌对小鼠有较强的致病性,且能通过小鼠血脑屏障。本研究证明了河南省猪群中存在14型HPS的感染,为中原地区防控HPS病提供了参考依据。 相似文献
9.
为探明2022年2月玉溪市江川区某规模猪场大批保育猪发病死亡原因，对采集病料进行了细菌分离，从肺门淋巴结分离得到一株菌落表面光滑、湿润、半透明圆形菌株。分离菌株经生化试剂条鉴定为多杀性巴氏杆菌，分离菌株的16S rRNA序列与NCBI GenBank中公布的多杀性巴氏杆菌PM8-6株的同一性达到99%以上，将分离菌株命名为PMJC-1株。荚膜分型结果显示该菌株为荚膜A型多杀性巴氏杆菌，毒力基因检测结果显示该菌含有黏附素、超氧化物歧化酶等6种毒力基因。分离菌株药敏试验表明，其仅对利福平、头孢哌酮、阿莫西林、呋喃妥因、头孢噻吩、大观霉素6种药物敏感，对其余18种药物均耐药。动物致病性试验结果显示该菌株对昆明小鼠具有较强致病性，8只实验组昆明小鼠在接种后72 h内发病死亡5只，其余3只发病后耐过康复。本研究结果可为生猪养殖过程中A型多杀性巴氏杆菌病的防治提供参考。 相似文献
10.
副猪嗜血杆菌的分离鉴定及药敏试验 总被引：2，自引：1，他引：1
黑龙江省近几年频繁发生以多发性浆膜炎、关节炎、脑膜炎以及急性死亡为特征的传染病,为猪场造成严重经济损失,为了确诊是否有副猪嗜血杆菌感染,采集病死猪肝脏、脾脏和肺脏等病料,进行副猪嗜血杆菌的分离;对其理化特性进行鉴定,应用PCR方法对其16S rRNA基因扩增后进行克隆测序,将测序结果在GenBank上进行BLAST分析,把相近的基因序列应用DNAStar软件进行同源性和进化关系分析;用分离菌株进行药物敏感性试验,筛选敏感药物。结果分离出一种具有多形性的NAD依赖性菌株,经鉴定为副猪嗜血杆菌;16S rRNA基因进化分析结果表明,分离菌株与以往报道的副猪嗜血杆菌中国、日本和美国分离株属于同一亚群,而西班牙分离株属于单独的亚群;分离菌株对壮观霉素和头孢拉定高度敏感。 相似文献
11.
试验选用96头平均体重14.82 kg左右的杜×长×大断奶仔猪,随机分成4组,每组3栏,每栏8头(公母各半)。对照组饲喂基础日粮,试验1、2、3组分别添加1%80目白术、0.2%白术多糖和1%微米白术。试验期30 d。结果表明:在生长性能方面,与对照组相比,1%微米白术添加组可显著提高日增重(P0.05)、降低饲料增重比和腹泻率,而且效果优于1%80目白术组和0.2%白术多糖组,在肠道形态和肠道微生态区系方面,与对照组相比,日粮添加1%80目白术、0.2%白术多糖、1%微米白术均可不同程度的提高十二指肠和空肠的绒毛高度,加深十二指肠和空肠的隐窝深度,并且增加肠道微生态区系的多样性,其中以1%微米白术添加组的效果最佳。 相似文献
12.
Sissay, M.M., Uggla, A. and Waller, P.J., XXXX. Prevalence and seasonal incidence of nematode parasites and fluke infections
of sheep and goats in eastern Ethiopia. Tropical Animal Health and Production, XXXX. A 2-year abattoir survey was carried out to determine the prevalence, abundance and seasonal incidence of gastro-intestinal
(GI) nematodes and trematodes (flukes) of sheep and goats in the semi-arid zone of eastern Ethiopia. During May 2003 to April
2005, viscera including liver, lungs and GI tracts were collected from 655 sheep and 632 goats slaughtered at 4 abattoirs
located in the towns of Haramaya, Harar, Dire Dawa and Jijiga in eastern Ethiopia. All animals were raised in the farming
areas located within the community boundaries for each town. Collected materials were transported within 24 h to the parasitology
laboratory of Haramaya University for immediate processing. Thirteen species belonging to 9 genera of GI nematodes (Haemonchus contortus, Trichostrongylus axei, T. colubriformis, T. vitrinus, Nematodirus filicollis, N. spathiger, Oesophagostomum
columbianum, O. venulosum, Strongyloides papillosus, Bunostomum trigonocephalum, Trichuris ovis, Cooperia curticei and Chabertia ovina), and 4 species belonging to 3 genera of trematodes (Fasciola hepatica, F. gigantica, Paramphistomum {Calicohoron} microbothrium and Dicrocoelium dendriticum) were recorded in both sheep and goats. All animals in this investigation were infected with multiple species to varying
degrees. The mean burdens of adult nematodes were generally moderate in both sheep and goats and showed patterns of seasonal
abundance that corresponded with the bi-modal annual rainfall pattern, with highest burdens around the middle of the rainy
season. In both sheep and goats there were significant differences in the mean worm burdens and abundance of the different
nematode species between the four geographic locations, with worm burdens in the Haramaya and Harar areas greater than those
observed in the Dire Dawa and Jijiga locations. Similar seasonal variations were also observed in the prevalence of flukes.
But there were no significant differences in the prevalence of each fluke species between the four locations. Overall, the
results showed that Haemonchus, Trichostrongylus, Nematodirus, Oesophagostomum, Fasciola and Paramphistomum species were the most abundant helminth parasites of sheep and goats in eastern Ethiopia. 相似文献
13.
Rassnick KM Gieger TL Williams LE Ruslander DM Northrup NC Kristal O Myers NC Moore AS 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2001,15(3):196-199
1-(2-Chloroethyl)3-cyclohexyl-1-nitrosourea (CCNU) is an alkylating agent in the nitrosourea subclass. A prospective evaluation of CCNU was done to determine the maximally tolerated dosage of CCNU in tumor-bearing cats. Response data were obtained when available. Twenty-five cats were treated with CCNU at a dosage of 50-60 mg/m3 body surface area. Complete hematologic data were available for 13 cats. Neutropenia was the acute dose-limiting toxicity. The median neutrophil count at the nadir was 1,000 cells/microL (mean, 2,433 cells/microL; range, 0-9,694 cells/microL). The time of neutrophil nadir was variable, occurring 7-28 days after treatment, and counts sometimes did not return to normal for up to 14 days after the nadir. Based on these findings, a 6-week dosing interval and weekly hematologic monitoring after the 1st treatment with CCNU are recommended. The nadir of the platelet count may occur 14-21 days after treatment. The median platelet count at the nadir was 43,500 cells/microL. No gastrointestinal, renal, or hepatic toxicities were observed after a single CCNU treatment, and additional studies to evaluate the potential for cumulative toxicity should be performed. Five cats with lymphoma and 1 cat with mast cell tumor had measurable responses to CCNU. Phase II studies to evaluate antitumor activity should be completed with a dosing regimen of 50-60 mg/m3 every 6 weeks. 相似文献
14.
Furosemide continuous rate infusion in the horse: evaluation of enhanced efficacy and reduced side effects 总被引：1，自引：0，他引：1
Johansson AM Gardner SY Levine JF Papich MG LaFevers DH Fuquay LR Reagan VH Atkins CE 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2003,17(6):887-895
Continuous rate infusion (CRI) of furosemide in humans is considered superior to intermittent administration (IA). This study examined whether furosemide CRI, compared with IA, would increase diuretic efficacy with decreased fluid and electrolyte fluctuations and activation of the renin-angiotensin-aldosterone system (RAAS) in the horse. Five mares were used in a crossover-design study. During a 24-hour period, each horse received a total of 3 mg/kg furosemide by either CRI (0.12 mg/kg/h preceded by a loading dose of 0.12 mg/kg IV) or IA (1 mg/kg IV q8h). There was not a statistically significant difference in urine volume over 24 hours between methods; however, urine volume was significantly greater after CRI compared with IA during the first 8 hours ([median 25th percentile, 75th percentile]: 9.6 L [8.9, 14.4] for CRI versus 5.9 L [5.3, 6.0] for IA). CRI produced a more uniform urine flow, decreased fluctuations in plasma volume, and suppressed renal concentrating ability throughout the infusion period. Potassium, Ca, and Cl excretion was greater during CRI than IA (1,133 mmol [1.110, 1,229] versus 764 mmol [709, 904], 102.7 mmol [96.0, 117.2] versus 73.3 mmol [65.0, 73.5], and 1,776 mmol [1,657, 2.378] versus 1,596 mmol [1,457, 1,767], respectively). Elimination half-lives of furosemide were 1.35 and 0.47 hours for CRI and IA, respectively. The area under the excretion rate curve was 1,285.7 and 184.2 mL x mg/mL for CRI and IA, respectively. Furosemide CRI (0.12 mg/kg/h) for 8 hours, preceded by a loading dose (0.12 mg/kg), is recommended when profound diuresis is needed acutely in horses. 相似文献
15.
B. Cinar Kul N. Bilgen J.A. Lenstra O. Korkmaz Agaoglu B. Akyuz O. Ertugrul 《Zeitschrift für Tierzüchtung und Züchtungsbiologie》2015,132(6):449-453
Genetic variations in chromosome Y are enabling researchers to identify paternal lineages, which are informative for introgressions and migrations. In this study, the male‐specific region markers, sex‐determining region‐Y (SRY), amelogenin (AMELY) and zinc finger (ZFY) were analysed in seven Turkish native goat breeds, Angora, Kilis, Hair, Honaml?, Norduz, Gürcü and Abaza. A SNP in the ZFY gene defined a new haplotype Y2C. All domestic haplogroups originate from Capra aegagrus, while the finding of Y1A, Y1B, Y2A and Y2C in 32, 4, 126 and 2 Turkish domestic goats, respectively, appears to indicate a predomestic origin of the major haplotypes. The occurrence of four haplotypes in the Hair goat and, in contrast, a frequency of 96% of Y1A in the Kilis breed illustrate that Y‐chromosomal variants have a more breed‐dependent distribution than mitochondrial or autosomal DNA. This probably reflects male founder effects, but a role in adaptation cannot be excluded. 相似文献
16.
Waruiru RM Thamsborg SM Nansen P Kyvsgaard NC Bogh HO Munyua WK Gathuma JM 《Tropical animal health and production》2001,33(3):173-187
The epidemiology of H. placei and of other gastrointestinal nematodes in yearling dairy cattle was examined on two farms in Kiambu District, central Kenya during each of 13 one-month periods from April 1993 to April 1994. On each farm, 32 newly weaned dairy calves were given a single dose of albendazole and then placed on experimental pastures. Twelve of the animals were designated for bi-monthly slaughter (n = 2) and analysis of worm population characteristics and 20 were designated for blood and faecal collection and for weighing. Two parasite-free tracer calves were grazed alongside the weaner calves each month throughout the study period and were also slaughtered for analysis of worm populations. Faecal egg counts, haematological and serum pepsinogen determinations, herbage larval counts, and animal live weight changes were recorded monthly. The study revealed that Haemonchus placei, Trichostrongylus axei, Cooperia spp. and Oesophagostomum radiatum were responsible for parasitic gastroenteritis and that H. placei was the predominant nematode present in the young cattle on both farms. Faecal egg counts from resident cattle and necropsy worm counts revealed that pasture larval levels were directly related to the amount of rainfall. The total worm burdens in the animals were highest during the rainy season (March–June and October–December) and lowest during the dry seasons (July–September and January–February). The very low recovery of immature larvae of H. placei from the tracer calves indicated that arrested development is not a feature of the life cycle of this parasite in central Kenya. The maintenance of the parasite population depended on continuous cycling of infection between the host and the pasture. The agroclimatic conditions of the study area were such that, in general, favourable weather conditions for the development and survival of the free-living stages of gastrointestinal nematodes existed all year round. 相似文献
17.
The occurrence of ectoparasites in sheep flocks is frequently reported but seldom quantified. Sheep production used to be a predominantly family activity in the state of Sa~o Paulo (Brazil), but it began to become a commercial activity in the past decade. Thus, information about the ectoparasites existing in sheep flocks has become necessary. The present data were obtained by means of questionnaires sent to all sheep breeders belonging to the `Associaça~o Paulista de Criadores de Ovinos' (ASPACO; Sa~o Paulo State Association of Sheep Breeders). Response reliability was tested by means of random visits paid to 10.6% of the respondents. Most of the properties (89.5%) reported the presence of one or more ectoparasites. Screw-worm (Cochliomyia hominivorax) was the most frequent ectoparasite (72.5%), followed by bot fly larvae (Dermatobia hominis, 45.0%), ticks (Amblyomma cajennense) and Boophilus microplus, 31.3%) and finally lice (Damalinia ovis, 13.8%). Combined infestations also occurred, the most common one being screw-worm with bot fly larvae (36.0%) followed by bot fly larvae with ticks (13.9%), screw-worm with ticks (9.3%), bot fly larvae with lice (6.9%), and ticks with lice (5.0%). The most common triple combination was screw-worm, bot fly larvae and ticks (12.8%). Breeds raised for meat or wool were attacked by bot fly larvae and ticks more often than other breeds. Lice were only absent from animals of indigenous breeds. The relationships among these ectoparasites are discussed in terms of sheep breeds, flock size, seasonality and the ectoparasitic combinations on the host. 相似文献
18.
Troxel MT Vite CH Van Winkle TJ Newton AL Tiches D Dayrell-Hart B Kapatkin AS Shofer FS Steinberg SA 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2003,17(6):850-859
The purpose of this study was to determine the frequency of different tumor types within a large cohort of cats with intracranial neoplasia and to attempt to correlate signalment, tumor size and location, and survival time for each tumor. Medical records of 160 cats with confirmed intracranial neoplasia evaluated between 1985 and 2001 were reviewed. Parameters evaluated included age, sex, breed, FeLV/FIV status, clinical signs, duration of signs, number of tumors, tumor location(s), imaging results, treatment, survival times, and histopathologic diagnosis. Most of the cats were older (11.3 +/- 3.8 years). Primary tumors accounted for 70.6% of cases. Metastasis and direct extension of secondary tumors accounted for only 5.6 and 3.8% of cases, respectively. Twelve cats (7.5%) had 2 or more discrete tumors of the same type, whereas 16 cats (10.0%) had 2 different types of intracranial tumors. The most common tumor types were meningioma (n = 93, 58.1%), lymphoma (n = 23, 14.4%), pituitary tumors (n = 14, 8.8%), and gliomas (n = 12, 7.5%). The most common neurological signs were altered consciousness (n = 42, 26.2%), circling (n = 36, 22.5%), and seizures (n = 36, 22.5%). Cats without specific neurological signs were common (n = 34, 21.2%). The tumor was considered an incidental finding in 30 (18.8%) cats. In addition to expected relationships (eg, meninges and meningioma, pituitary and pituitary tumors), we found that lesion location was predictive of tumor type with diffuse cerebral or brainstem involvement predictive of lymphoma and third ventricle involvement predictive of meningioma. 相似文献
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Evaluation of biohydrogenation rate of canola vs. soya bean seeds as unsaturated fatty acids sources for ruminants in situ 
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下载免费PDF全文 S. Pashaei T. Ghoorchi A. Yamchi 《Journal of animal physiology and animal nutrition》2016,100(2):211-216
An experiment was conducted to study disappearance of C14 to C18 fatty acids, lag times and biohydrogenation (BH) rates of C18 fatty acids of ground soya bean and canola seeds in situ. Three ruminally fistulated Dallagh sheep were used to determine ruminal BH of unsaturated fatty acids (UFAs). Differences in the disappearance of fatty acids through the bags and lag times were observed between the oilseeds. We saw that the longer the incubation time of the oilseeds in the rumen, the lower the content of C18:2 and C18:3. Significantly higher lag times for both C18:2 and C18:3 were observed in ground canola compared to ground soya bean. BH rates of C18:2 and C18:3 fatty acids in soya bean were three times higher than those of canola. These results suggest that the fatty acid profile of fat source can affect the BH of UFAs by rumen micro‐organisms. So that UFAs of canola had higher ability to escape from ruminal BH. It seems that fatty acid profile of ruminant products is more affected by canola seed compared to soya bean seed. 相似文献