首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献，搜索用时 906 毫秒
1.
用鸡胚培养法和红血球凝集(HA)试验,测定中药泽漆注射液对鸡新城疫病毒的抑制作用.试验共分4组,第Ⅰ组接种病毒尿囊液与中药泽漆混合液,HA滴度为0;第Ⅱ组接种病毒尿囊液与西药金刚烷胺混合液,HA滴度为4loga;第Ⅲ组接种病毒尿囊液与生理盐水混合液,HA滴度为8log2;第Ⅳ组不接种病毒尿囊液,不给药,HA滴度为0.结果表明,中药泽漆注射液对鸡胚无毒性作用.中药泽漆与病毒同时接种鸡胚,能完全抑制鸡新城病毒在鸡胚中增殖.  相似文献   

2.
用鸡胚培养法和红血球凝集(HA)试验,测定中药蟾甘口服液对鸡新城疫病毒的抑制作用。试验共分4组,第Ⅰ组接种病毒尿囊液与中药蟾甘口服液混合液,HA滴度0。第Ⅱ组接种病毒尿囊液与西药金刚烷胺混合液,HA滴度5log2。第Ⅲ组接种病毒尿囊液与生理盐水混合液,HA滴度9log2。第Ⅳ组不接种病毒尿囊液,不给药,HA滴度0。结果表明,中药蟾甘口服液对鸡胚无毒性作用。中药蟾甘口服液与病毒同时接种鸡胚,能完全抑制鸡新城病毒在鸡胚中增殖。  相似文献   

3.
用鸡胚培养法和红血球凝集(HA)试验,测定中药金丝桃素注射液对鸡新城疫病毒的抑制作用。试验共分4组,第Ⅰ组接种病毒尿囊液与中药金丝桃素混合液,HA滴度0。第Ⅱ组接种病毒尿囊液与西药金刚烷胺混合液,HA滴度5log2。第Ⅲ组接种病毒尿囊液与生理盐水混合液,HA滴度9log2。第Ⅳ组不接种病毒尿囊液,不给药,HA滴度0。结果表明,中药金丝桃素注射液对鸡胚无毒性作用。中药金丝桃素与病毒同时接种鸡胚,能完全抑制鸡新城病毒在鸡胚中增殖。  相似文献   

4.
以H9亚型低致病性禽流感病毒（AIV）的LG1株第20代种毒接种10日龄SPF鸡胚，收获尿囊液，经浓缩制成常规灭活疫苗。用浓缩疫苗及其不同稀释度的疫苗对12日龄的SPF鸡颈部皮下注射0.2ml/只.SPF动物隔离罩内饲养21d后采集血清,随即用此病毒的第8代进行攻毒.结果表明,该浓缩疫苗及其1:1稀释后的疫苗对12日龄SPF鸡具有较好的免疫原性,平均HI滴度均达到9.4log2.并且各免疫鸡只血清中HI抗体大于7log2,但稀释至1/4的疫苗免疫后平均HI滴度只有5.log2.在人工攻毒后3d和7d,对照组有7/10和1/10分离到病毒,但3个试验组免疫后均未分离到病毒.  相似文献   

5.
用鸡胚培养法和红血球凝集（HA）试验,测定中药“金不换”注射液对鸡新城疫病毒的抑制作用。试验共分4组,第Ⅰ组接种病毒尿囊液与中药金不换混合液,HA滴度0。第Ⅱ组接种病毒尿囊液与西药金刚烷胺混合液,HA滴度3log2。第Ⅲ组接种病毒尿囊液与生理盐水混合液,HA滴度9log2。第Ⅳ组不接种病毒尿囊液,不给药,HA滴度0。结果表明,中药“金不换”注射液对鸡胚无毒性作用,与病毒同时接种鸡胚,能完全抑制鸡新城病毒在鸡胚中增殖。  相似文献   

6.
选用中药组方对10日龄鸡胚进行药物毒性试验(第1组)和鹅副粘病毒抑制试验(第2组)。其中,第2组分为试验Ⅰ组(接种病毒尿囊液与中药组方混合液)、试验Ⅱ组(接种病毒尿囊液与西药利巴韦林混合液)、试验Ⅲ组(接种病毒尿囊液与生理盐水混合液)、对照组(不接种病毒尿囊液,不给药),并进行红血球凝集(HA)试验。结果:中药组方接种鸡胚无死亡;试验Ⅰ组HA滴度为0,试验Ⅱ组HA滴度为5 log2,试验Ⅲ组HA滴度为9 log2,对照组HA滴度为0。结果表明:中药组方对鸡胚无毒副作用;中药组方与病毒尿囊液同时接种鸡胚,能完全抑制鹅副粘病毒在鸡胚中增殖。  相似文献   

7.
中药炎康注射液对伪狂犬病病毒的抑制试验   总被引：1，自引：0，他引：1  
用鸡胚培养法和红血球凝集(HA)试验,测定中药炎康注射液对伪狂犬病病毒的抑制作用。试验共分4组:第Ⅰ组同时接种病毒尿囊液与中药炎康混合液,HA滴度为0。第Ⅱ组同时接种病毒尿囊液与西药金刚烷胺混合液,HA滴度为4 log2。第Ⅲ组同时接种病毒尿囊液与生理盐水混合液,HA滴度为7 log2。第Ⅳ组不接种病毒尿囊液,不给药,HA滴度为0。结果表明,中药炎康注射液对鸡胚无毒性作用;中药炎康与病毒同时接种鸡胚,能完全抑制伪狂犬病病毒在鸡胚中增殖。  相似文献   

8.
将鸡新城疫La Sota株病毒接种于含有不同水平新城疫母源HI抗体的鸡胚中。在不同的孵化条件下孵育。测定母源抗体及孵化条件对病毒增殖的影响.结果表明,当免疫鸡胚的平均母源HI抗体为7.48log2时,平均病毒增殖滴度为10×7.32log2;而非免疫鸡胚平均母源HI抗体为2.55log_2(2.4～2.7log2)时,病毒增殖滴度平均可达10×8.25log_2。尽管后者比前者略高。但在统计学上无显著性差异.鸡胚接种后84～88小时病毒增殖滴度达到最高水平。在种毒1:40～1:200的稀释范围内,病毒的增殖滴度无明显影响.  相似文献   

9.
用新城疫病毒(NDV)La Sota株接种的鸡胚含毒尿囊液,经灭活、透析和浓缩后,研制出琼脂扩散(AGP)抗原。应用AGP和HI试验同步检测不同免疫状态的鸡血清样品977份。试验表明,HI抗体效价≥16的被检血清,AGP阳性率为98.5％(268/272);HI抗体效价=8的,AGP阳性率为79.3％(142/179);HI抗体效价≤4的526份血清,AGP试验均为阴性。抗原经2次冻融,或在4℃和-3℃保存10个月以上,其效价未见降低。AGP抗原可用于ND的免疫监测和流行病学调查。  相似文献   

10.
用鸡胚培养法和红血球凝集(HA)试验,测定中药虎杖注射液对鸡新城疫病毒的抑制作用。试验共4组,第Ⅰ组接种病毒尿囊液与中药虎杖混合液,HA滴度0。第Ⅱ组接种病毒尿囊液与西药金刚烷胺混合液,HA滴度4log2。第Ⅲ组接种病毒尿囊液与生理盐水混合液,HA滴度7log2。第Ⅳ组不接种病毒尿囊液,不给药,HA滴度0。结果表明,中药虎仗注射液对鸡胚无毒性作用。中药虎杖与病毒同时接种鸡胚,能完全抑制鸡新城疫病毒在鸡胚中增殖。  相似文献   

11.
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   

12.
Human and equine athletes are reported to have a high prevalence of gastric disease, and anecdotal evidence suggests a similar phenomenon applies to racing sled dogs. To investigate the prevalence of gastric disease in racing sled dogs, we conducted 2 gastroscopy studies on dogs competing in the annual Iditarod Sled Dog Race. A pilot study of dogs that were either dropped from the 2000 Iditarod Sled Dog Race because of illness or that finished the race indicated that, approximately 5 days after competing, 10 of 28 dogs (35%) had endoscopic evidence of gastric ulceration, erosion, or hemorrhage. The next year, an endoscopic study of 73 dogs participating in the 2001 Iditarod race was performed in order to evaluate a larger population of dogs. Data from 70 of these dogs could be used; 34 (48.5%) had ulceration, erosion, gastric hemorrhage, or some combination of these findings. When this group of 70 dogs was compared retrospectively to a control group of 87 dogs presented to the Texas A&M University (TAMU) Veterinary Medical Teaching Hospital, the Iditarod sled dogs had a significantly higher prevalence (P = .049) of gastric lesions. These findings suggest that, similar to athletes of other species, elite canine athletes have an increased prevalence of gastric disease compared to the canine population at large.  相似文献   

13.
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   

14.
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   

15.
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   

16.
Comparison of different tests to diagnose feline infectious peritonitis   总被引：1，自引：0，他引：1  
  相似文献   

17.
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   

18.
Serum biochemical values and the wet weight to dry weight ratios of tissues were determined in yaks in Shandan county of Gansu province. The liver, kidney, heart and muscle contents of seven elements in yaks were also analysed. Most serum biochemical values were similar to those of cattle, camels and sheep, but the calcium concentration was considerably above the normal range for other ruminants. The liver contained the highest concentrations of copper, manganese and cobalt and the kidney of selenium, iron and calcium.Abbreviations Alb albumin - ALT alanine aminotransferase - AST aspartate aminotransferase - BUN blood urea nitrogen - Chol cholesterol - Glob globulin - -GT -glutamyl transpeptidase - IP inorganic phosphorus - TP total protein  相似文献   

19.
正We are pleased to publish the second special issue on avian brood parasitism and to be responsible guest editors for the two special issues of Chinese Birds (Vol. 3, No. 4, 2012 and Vol. 4, No. 1, 2013), entitled "Avian Brood Parasitism - A Growing Research Area in Behavioral Ecology". The first issue was published in December 2012. The goal of the two special issues is to publish accumulated knowledge and some of the recent developments in  相似文献   

20.
Tropical Animal Health and Production -  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号