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1.
流行病学调查表明，肉鸭鸭疫氏杆菌病最是发病日龄为１０日龄，直至出售中仍在发病，发病率５％－９０％，死亡率５％－６０％，是肉鸭饲养中的一大传染病。对自然病例和人工感染病例剖检，本病的特征性病理变化为纤维素性心包炎、胸膜炎、气囊炎和肝周炎。疫区病鸭体内分离的１０朱细菌，经培养特性和生化试验鉴定均为鸭疫巴氏杆菌；分离的菌株通过易感鸭感染试验获得成功，证明该菌具有致病性  相似文献   

2.
武汉地区鸭疫巴氏杆菌的分离鉴定   总被引：7，自引：2，他引：7  
２０００年３～５月,对送检于华中农业大学兽医院的病鸭进行病理剖检及细菌分离鉴定,确定送检病例５０％以上由鸭疫巴氏杆菌（ＰＡ）引起,其发病日龄为７～５０日龄。从病鸭的脑脊液、心血、肝等均易分离到ＰＡ。药敏试验显示所有菌株对氯霉素高度敏感。此次试验结果说明,在武汉地区鸭疫巴氏杆菌确已存在,并已成为严重危害当地养鸭业的重要疾病之一。  相似文献   

3.
１９９９年４月和５月，在镇江郊区某鸭场有两批樱桃谷肉鸭发生了以纤维素性渗出性变化，肝周炎、心包炎、气囊炎为主要病变的疫病。第一批２０００只肉鸭在３天内发病９２０只，死亡２５６只，发病率４６％，死亡率１２．８％。第１批病肉鸭经送市畜牧兽医站临床剖检及实验室诊断，同时取病料到扬州大学微生物教研室进行细菌分离、血清型鉴定和生化试验，确诊是由Ⅱ型鸭疫里氏杆菌感染所致，现将情况报告如下。１发病情况该鸭场于１９９９年４月２５日从常州某炕房购进樱桃谷肉鸭２０００只进行饲养，饲喂某正大公司生产的肉鸭料。该鸭场鸭…  相似文献   

4.
1995年11月,某鸭场一批樱桃谷肉鸭发生疫病,一栏520羽鸭,在一周内死亡360多羽,病鸭主要病变为纤维素性心包炎、肝周炎、气囊炎、腹膜炎等变化,经分离培养,确诊为鸭疫巴氏杆菌与大肠杆菌混合感染,现将有关情况报道如下:1 临床症状发病鸭群约18日龄,病鸭临床上主要表现为精神不振、拉绿色稀粪、头颈震颤、昏睡,有轻度罗音.开始死亡较急,后逐渐趋缓,一周内,520羽鸭子死亡360多羽,死亡率高达69.2%.  相似文献   

5.
肉鸭爆发鸭疫巴氏杆菌病的诊疗徐健（湖北省石首市畜禽开发公司４３４４００）石首市一养鸭专业户饲养的２４００只樱桃谷肉仔鸭于２０日时，突然发病。发病初期，曾用链霉素（５００单位／只）经饮水投服治疗二天，但无明显疗效，仍发生大批死亡，死亡率达２８．５／。经...  相似文献   

6.
1999年4月和5月,镇江币郊区某鸭场的两批樱桃谷肉雏鸭发生了以纤维素性渗出性变化,肝周炎、心包炎、气囊炎为主要病变的疫病。肉鸭经临诊剖检和实验室初步诊断,同时取病料到扬州大学畜牧兽医学院微生物教研组进行细菌分离、血清型鉴定及生化试验,确诊此疫病是由n型鸭疫里氏杆菌感染所致,现将情况报道如下。1发病情况该鸭场于1999年4月25日从常州某炕房捉进樱桃谷肉雏鸭2000只进行饲养,饲喂某公司生产的肉鸭料,鸭舍卫生状况较差,采用套养方式进行饲养,每隔！0－12d进一批雏鸭,消毒不严格。肉雏鸭在匕日龄时发病,到18日龄时3d时间…  相似文献   

7.
鸭疫巴氏杆菌病又称鸭传染性浆膜炎,是鸭的一种接触性传染病.一般10～40日龄发病,但以15～30日龄发病最多,发病率为30%～95%,病死率30%左右,最高可达80%,病后康复鸭生长缓慢.  相似文献   

8.
鸭疫巴氏杆菌病，又称鸭传染性浆膜炎，是由鸭疫巴氏杆菌即鸭疫里默氏杆菌引起鸭的一种急性或慢性接触性传染病。我市从１９９５年在甘棠发现本病以来，其危害性日益突出，已成为影响我市养鸭业的一种主要传染病。为了更好地防治本病，提高广大鸭农饲养效益，现将本市鸭疫巴氏杆菌的诊治情况介绍如下：１流行病学本病主要发生于７～５６日龄的麻鸭、半番鸭和番鸭，其中以２～３周龄的鸭最易感，而１周龄以下和８周龄以上的不易感染发病。本病在我市一年四季均有发生，但以冬春气候变化剧烈时较易感，此外，还与栏舍环境、饲管水平及其它…  相似文献   

9.
鸭疫巴氏杆菌病又称新鸭病、鸭败血症、鸭疫败血症和传染性浆膜炎 ,是由革兰氏阴性巴氏杆菌引起的一种急性或慢性疾病。其主要特征是纤维性心胞炎、肝周炎、气囊炎、脑膜炎和关节炎 ,1～ 8周龄的雏鸭高度易感 ,2～ 4周龄雏鸭最为严重 ,种鸭及产蛋的蛋鸭罕见发病 ,发病率、死亡率与季节、饲养管理条件有关 ,以低温、阴雨季节较为严重 ,死亡原因主要是关节炎导致运动失调以致无法采食而死亡 ,死亡率为 2 0 %～70 % ,本病潜伏期 1～ 3d ,长者可达 7～ 8d。主要通过呼吸道感染 ,其次为创口感染 ,也可通过种蛋传递。2 0 0 2年广南县珠琳镇糯者新…  相似文献   

10.
郑州市郊某肉鸭饲养户,购入北京肉鸭２０００只,１８日龄时突然发病并死亡３１只,以后９日内共死亡４２２只,死亡率为２１．１％,经综合诊断,确诊为鸭疫巴氏杆菌与大肠杆菌混合感染。一、临诊症状病鸭嗜眠、缩颈、腿软,不愿走动,食欲减少,眼有粘液性分泌物,粪便...  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.
Tropical Animal Health and Production -  相似文献   

15.
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   

16.
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   

17.
Our particular attention in this article was given to natural mediators for macrophages isolated from the sites of tissue injury. A number of chemotactic factors, which may satisfy many criteria making them acceptable as inflammatory leucocyte chemotactic factors, has been separated. Among them, our laboratory has isolated three macrophage (monocyte) chemotactic factors (MCF-a, -b and -c). Their purification, characterization and functional specificity are discussed.  相似文献   

18.
Comparison of different tests to diagnose feline infectious peritonitis   总被引：1，自引：0，他引：1  
  相似文献   

19.
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   

20.
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   

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