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一、发病情况及临床症状 1.北京白鸡发病情况与临床症状安阳市食品公司繁殖场饲养的北京白童鸡(4—5月龄),于1988年9月不断发病死亡。经检查见:雏鸡排黄绿色粪便,有的排红褐色,恶臭带泡沫的粪便。母鸡头部皮肤、鸡冠呈淡褐色,公鸡鸡冠明显发褐。共检查患鸡250只,疑为组织滴虫病的鸡80只,占病鸡总数的32％。 相似文献
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本试验旨在研究日粮不同蛋白水平对7~12周龄略阳乌鸡母鸡免疫及抗氧化性能的影响。试验选取42日龄略阳乌鸡母鸡180只,随机分成3组,每组5个重复,每重复12只鸡。各试验组分别饲喂蛋白水平为12.39%、16.60%和20.15%的日粮,于8、10和12周龄末采集血清及肝脏样品测定免疫及抗氧化指标。结果表明:日粮蛋白水平对8、10和12周龄略阳乌鸡母鸡血清中各项免疫指标均没有显著影响(P0.05)。日粮16.60%和20.15%蛋白水平组较12.39%蛋白水平组显著提高了8周龄略阳乌鸡母鸡血清T-AOC含量(P0.05)及10周龄略阳乌鸡母鸡血清SOD含量(P0.05)。随着日粮蛋白水平的升高,12周龄略阳乌鸡母鸡血清中MDA含量显著降低(P0.05)。8、10周龄略阳乌鸡母鸡肝脏中CAT含量均随日粮蛋白水平提高而显著增加,但在12周龄未表现出显著性差异。由此可见,在本试验条件下,随着日粮蛋白水平升高,略阳乌鸡机体抗氧化功能具有显著增强的趋势。 相似文献
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一、发病经过2000年8～10月份，我省部分地区的产蛋鸡发生一种以内脏器官和肌肉组织广泛出血为特征的疾病。产蛋鸡不分日龄，均发生此病。鸡只突然精神沉郁、呼吸困难、有咳血现象，部分鸡只鸡冠像白纸一样苍白，排翠绿色稀粪，并很快死亡，死亡率不高，但每天均呈零星死亡。母鸡产蛋量表现下降，笔者受当地养殖户的要求，急赴现场诊断，现将诊断结果报告如下：二、发病特点1．主要发生于正产蛋的鸡，属初次发生。2．发病季节正处于北方最炎热的夏末季节。蚊子与库蠓已在当地养殖区滋生开来，据当地老百姓反映，今年的蚊子又黑又大。3．正产… 相似文献
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2008年8月21日,临朐县一养殖户带5只发病鸡及病死鸡到本站就诊.据畜主诉,其饲养的2750只29龄的雏鸡从发病到现在已经1周了.发病初期只有部分鸡表现为呼吸困难、羽毛松乱、排白色稀粪等临床症状.凭多年的养殖经验认为这些小雏鸡患了传染性法氏囊病,随后紧急注射了高免卵黄抗体,在饮水中加入了阿莫西林、黄芪多糖等药物,3d后不仅没见效果,反而发病鸡只症状更严重了,并且波及到了全群.每天总有30多只死亡,小雏鸡都排水样粪便,病情无法控制,随即到本站就诊. 相似文献
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鸡卡氏白细胞虫病俗称白冠病。1909年首次在越南被发现。我国自80年代本病在广州地区流行以来,其他地区也陆续有发病的报道.鸡卡氏白细胞虫病的发病季节多为每年的4—10月,多发生于雏鸡。1月龄左右的鸡发病较为严重,死亡率高,而母鸡感染后,仅发现个别死亡,耐过鸡消瘦,产蛋率下降。1998年5月初,我市某种鸡场开产种鸡爆发急性卡氏白细胞虫病,现将情况报道如下。一、发病情况潮州市某种鸡场笼养27周龄种鸡6950羽,其中母鸡6640羽,公鸡310羽。5月1日,见部分鸡只出现排绿色和白色稀粪,即在饲料中加人抗菌王粉剂喂服,但2天后,排这种… 相似文献
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平凉市养鸡专业户贾某,散养蛋鸡52只。为了给鸡补充钙质喂以猪骨头,但所喂骨块过大,被鸡吞食后,致使3只产蛋母鸡发生嗉囊堵塞。病鸡表现精神萎顿、不食、呆立一隅。禽主要求治 相似文献
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1991年5月,本市某鸡场175日龄艾维茵肉种公鸡发生一种以关节肿大、跛行和拉绿色或黄绿色稀便为特征的疫病。经临床观察及病理剖检、实验室诊断确诊为鸡关节炎型葡萄球菌病。及时采取防治措施,疫病很快得到了控制,诊治结果如下:一、发病情况艾维茵肉种公鸡在150日龄之前,与种母鸡隔离,由于饲养管理较好,月死淘率约为0.2%。种公鸡于151日龄时转入母鸡群混养,共放入种公鸡301只,种母鸡存栏数为2414只。由于采用地面平养,则以地面空悬竹排为栖架。投放半个月后,发现个别种公鸡表现跛行,并逐渐增多,不到1周时间,就有46只公鸡发病,发病率为15.3%,死亡7只,淘汰9只,种公鸡死淘率占发病鸡的34.8%。 相似文献
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魏静 《四川畜牧兽医学院学报》2009,(4):28-32
在现代法律秩序中,商会自治规范是制定法的基础和必要的补充,甚至在某些方面替代了制定法;商会自治规范主要包括商会组织规范、行为规范、惩罚规范以及争端解决规范等;其效力仅及于其内部成员;商会自治规范和制定法之间存在冲突,但也存在整合的基础。 相似文献
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本文概述了猪的毛色类型、猪的毛色遗传模式,着重综述了猪毛色基因分子基础的研究进展,指出存在问题并就未来发展方向做了思考。 相似文献
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以国际标准强毒Ｒ株人工感染非免疫产蛋鸡,定时扑杀,分别从鼻窦、眶下孔、气管、肺、气囊、卵巢和输卵管分离ＭＧ,并收集感染鸡所产蛋分离ＭＧ。结果表明,人工感染４８小时后上、下呼吸道及肺已被全面感染,９６小时气囊已被感染,１２０小时输卵管已能分离到ＭＧ,卵巢始终分离不到ＭＧ。人工感染鸡自１４４小时便能在其所产蛋中分离出ＭＧ。药物治疗能在７２小时内消除感染,油乳剂苗则需２４天后逐渐降低蛋内ＭＧ分离率,药物卵内注射、种蛋药浴、高温处理均能杀死卵内ＭＧ,但以研制的种蛋浸泡剂药浴效果为最好。 相似文献
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REASONS FOR PERFORMING STUDY: Centesis of the bicipital bursa using an 8.9 cm long spinal needle has been reported but the alternative of employing a 3.8 cm long hypodermic needle requires validation. OBJECTIVE: To compare the efficacy of 2 different methods of centesis of the bicipital bursa and to evaluate the usefulness of ultrasonographic imaging to determine the location of solution administered when centesis of the bursa is attempted. METHODS: For Trial 1, 6 clinicians, who had no previous experience of centesis of the bicipital bursa, attempted to inject a solution composed of an aqueous radiopaque contrast medium and physiological saline solution (PSS) into the bicipital bursae of 2/12 horses using the previously described distal approach to inject one bursa and a proximal approach to inject the contralateral bursa. The bicipital tendon and bursa were examined ultrasonographically before and after injection; and both shoulders were examined radiographically to identify the location of the medium. In Trial 2, another 6 clinicians, also with no previous experience of centesis, repeated Trial 1, using 6 horses, but the radiopaque contrast medium was mixed with air instead of PSS. RESULTS: Accuracy of centesis using the proximal approach was 39% and that of the distal approach 28%. Ultrasonographic examination of the shoulder allowed the location of solution and air to be accurately predicted in all 12 shoulders examined. CONCLUSIONS: Clinicians who have had no previous experience performing centesis of the bicipital bursa are unlikely to be successful in centesis using either approach. Radiographic examination after injecting a radiopaque contrast medium may be necessary to assess the success of centesis especially if bursal fluid is not obtained during centesis. Injecting air along with the radiopaque contrast medium provides more accurate ultrasonographic confirmation of centesis and better radiographic definition than does injection without air. 相似文献
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Effects of size of ingestively masticated fragments of plant tissues on kinetics of digestion of NDF
Ingestively masticated fragments were collected and sized via sieving. Different sizes of esophageal masticate and ruminal digesta fragments, and ground fragments of larger masticated pieces were incubated in vitro, and undigested NDF remaining at intervals of up to 168 h of incubation was determined. The ruminal age-dependent time delay (tau) for onset of digestion of NDF was positively correlated (P < 0.004) with the mean sieve aperture estimated to retain 50% of the fragments between successive sieve apertures (MRA). Degradation rate of potentially degradable NDF (PDF) and level of indigestible NDF were not related (P > 0.10) to MRA of masticated and ground fragments. Estimates of tau were positively related to MRA, with slopes of bermudagrass < corn silage < ruminal fragments of corn silage. It was concluded that fragment size-, and consequently, ruminal age-dependent onset of PDF degradation of a mixture of different fragment sizes results in an age-dependent rate of degradation of the more rapidly degrading of two subentities of PDF. Models are proposed that assume a tau before onset of simultaneous degradation of PDF from two pools characterized as having gamma-modeled age-dependency and age-constant rates. The ruminal age-dependent pool seems to be associated with the faster-degrading pool, and its rate parameter increases with range in MRA in the population of fragments. Conceptually, the ruminal age-dependent rate parameter for PDF degradation seems to represent a composite of several effects: 1) effects of the size-dependent tau; 2) range in MRA of the population of ingestively masticated fragments; and 3) subentities of PDF that degrade via more rapid age-dependent rates compared with subentities of PDF that degrade via age-constant rates. The estimated fractional rates of ruminative comminution of ingestively masticated fragments (0.060 to 0.075/h) were of a magnitude similar to the mean fractional rates of PDF digestion (0.030 to 0.085/h), which implies that ruminative comminution may be first-limiting to fractional rate of PDF digestion. The in vivo roles of ingestive and ruminative mastication of fragments on PDF degradation must be considered in any kinetic system for estimating PDF digestion in the rumen. These results and others in the literature suggest that the rate of surface area exposure rather than intrinsic chemical attributes of PDF may be first-limiting to degradation rate of PDF in vivo. 相似文献