Practices and outcome of artificial cardiac pacing in 154 dogs

Artificial pacing (AP) is a treatment for symptomatic bradyarrhythmias unresponsive to medical therapy. This retrospective study was designed to define the practices and outcome of AP in dogs at 7 referral institutions participating in the Companion Animal Pacemaker Registry and Repository (CANPACERS). The indications, implantation techniques, complications, long-term outcome, and owner satisfaction were examined. One hundred fifty-four dogs were identified as undergoing AP from January 1, 1991, to January 1, 1996. Third-degree atrioventricular (AV) block (n = 91; 59%) and sinus node dysfunction (n = 45; 29%) were the most common indications for AP Transvenous endocardial AP systems were implanted in 136 dogs (88%), and epicardial systems were implanted in 18 (12%). Complications associated with AP were reported in 84 dogs (55%). Major complications occurred in 51 dogs (33%), including dislodgement of the pacing lead (n = 15; 10%), generator failure (n = 10; 6%), cardiac arrest during implantation (n = 9; 6%), and infection (n = 7; 5%). Minor complications occurred in 47 dogs (31%), including seroma formation (n = 18; 12%), muscle twitch (n = 17; 11%), and inconsequential arrhythmias (n = 15; 10%). Fourteen dogs (9%) experienced both major and minor complications. Survival analysis revealed 1-, 2-, and 3-year survival rates of 70, 57, and 45%, respectively. Age and presence of preexisting congestive heart failure (CHF) had a negative effect on survival (P = .001). Sixty percent of dogs with preexisting CHF died within 1 year of implantation, whereas 25% of dogs without heart failure died during the same period. Owners rated their satisfaction with the procedure as high in 80% of the dogs.     

油乳剂疫苗中硬脂酸铝含量与油相水相比例关系研究

进行了鸡新城疫、传染性支气管炎、产蛋下降综合征三联油乳剂疫苗生产中降低油相比例的试验.当油乳剂疫苗的油相中硬脂酸铝含量分别为2%、1%、0.5%,对应的油相:水相分别为3:1、2:1和1:1时进行的乳化试验结果表明:随着油相中硬脂酸铝含量降低,油相和水相的比例相应降低,呈正比例关系.当油相中硬脂酸铝含量与油/水比分别为2%和3:1、1%和2:1、0.5%和1:1时,制备的油苗质量均达到了国家标准.     

鸡各种综合症的防治

近年来鸡的各种综合症发病率明显升高，严重危害养鸡业的发展。这些综合症必须要引起我们的重视，认真分析原因，采取有力的防治措施，控制病害的进一步发展和流行。     

饲粮蛋白能量比值与产蛋鸡脂肪肝综合症发生率的关系研究

采用每千克含2.59、2.64、2.70及2.75兆卡的4个代谢能水平的配方,饲喂产蛋鸡,结果证明,日粮蛋白质与代谢能之间的比值大小,对鸡的生产性能和鸡脂肪肝综合症的发生率影响较大。试验1～4组蛋能比值依次为66.94、64.77、62.74及60.97,脂肪肝综合症的发生率相应为30％、 10％、 10％和0,其相关性极为显著(r=0.79);产蛋性能:第二组产蛋量最高(平均每羽16.49千克),第一组次之,第四组最低(15.36千克)。     

Double in situ hybridization for simultaneous detection and differentiation of porcine circovirus 1 and 2 in pigs with postweaning multisystemic wasting syndrome

Double in situ hybridization using a digoxigenin-labelled porcine circovirus 1 (PCV1) and biotinylated PCV2 probe, was developed for the simultaneous detection and differentiation of PCV1 and PCV2 in formalin-fixed, paraffin-embedded tissues from pigs with postweaning multisystemic wasting syndrome. The combination of an alkaline phosphatase conjugated antidigoxigenin system with alkaline phosphatase conjugated streptavidin-biotin system allowed identification of PCV1 and/or PCV2. No evidence of cross-reaction was observed. Positive cells exhibited a red or dark brown reaction product for PCV1 and PCV2, respectively. Both PCV DNAs were observed mainly in the cytoplasm but occasionally in the nucleus. Co-localization of hybridization signal for both PCV1 and PCV2 was present in macrophages and multinucleated giant cells of the lymph node and spleen. This double-labelling technique for the differentiation between PCV1 and PCV2 is suitable for pathogenesis studies and diagnostic applications.     

Transient hypoparathyroidism following successful treatment of hypercalcaemia of malignancy in a dog

A 4-year-old, entire female, English Cocker Spaniel was presented for treatment of lymphosarcoma and secondary hypercalcaemia. After induction chemotherapy the dog became severely hypocalcaemic and showed signs of weakness, muscle fasciculation and facial pruritus. Hormone analysis confirmed inadequate production of parathyroid hormone. Although hypocalcaemia has been previously reported as a component of tumour lysis syndrome, it has not been associated with transient parathyroid hormone deficiency.     

An Outbreak of Gangrenous Syndrome among Buffaloes and Cattle in West Bengal: Clinicopathological Studies

Gangrenous syndrome/Degnala disease was recorded in a large number of buffaloes and cattle in Murshidabad district of West Bengal, India. Fusarium spp. had been isolated from the mouldy paddy straw which were fed to the animals. There was a reduction in the incidence of the disease following withdrawal of the mouldy paddy straw. Histopathological examination showed necrosis and loss of architectural details in the skin.