Spinal Epidural Abscess in Two Calves

Objective— To report clinical signs, diagnostic and surgical or necropsy findings, and outcome in 2 calves with spinal epidural abscess (SEA). Study Design— Clinical report. Animals— Calves (n=2). Methods— Calves had neurologic examination, analysis and antimicrobial culture of cerebrospinal fluid (CSF), vertebral column radiographs, myelography, and in 1 calf, magnetic resonance imaging (MRI). A definitive diagnosis of SEA was confirmed by necropsy in 1 calf and during surgery and histologic examination of vertebral canal tissue in 1 calf. Results— Clinical signs were difficulty in rising, ataxia, fever, apparent spinal pain, hypoesthesia, and paresis/plegia which appeared 15 days before admission. Calf 1 had pelvic limb weakness and difficulty standing and calf 2 had severe ataxia involving both thoracic and pelvic limbs. Extradural spinal cord compression was identified by myelography. SEA suspected in calf 1 with discospondylitis was confirmed at necropsy whereas calf 2 had MRI identification of the lesion and was successfully decompressed by laminectomy and SEA excision. Both calves had peripheral neutrophilia and calf 2 had neutrophilic pleocytosis in CSF. Bacteria were not isolated from CSF, from the surgical site or during necropsy. Calf 2 improved neurologically and had a good long‐term outcome. Conclusion— Good outcome in a calf with SEA was obtained after adequate surgical decompression and antibiotic administration. Clinical Relevance— SEA should be included in the list of possible causes of fever, apparent spinal pain, and signs of myelopathy in calves.     

中哈边境塔城区域迁飞性昆虫雷达观测研究初探

2017年和2018年6月至8月运用KC-08XVSD型昆虫雷达,结合探照灯诱虫器和地面诱虫灯诱捕数据及地面气象数据,分析了中哈边境塔城区域空中昆虫飞行特征及主要类群。结果表明:高空灯共诱捕到昆虫151种,分属12目50科,主要以鳞翅目和鞘翅目为主,地面灯共诱捕到昆虫137种,分属12目54科,主要以鞘翅目、半翅目、双翅目和直翅目为主,其中高空灯下宽胫夜蛾、旋歧夜蛾和甘薯天蛾的种群数量具有突增突减现象。雷达监测结果显示:灯下诱集到大量昆虫时,雷达回波时间主要集中在22:00-02:00,回波高度主要集中在200~600 m,有明显的成层现象和哑铃形回波分布。偏西风天气、风速在1.4~2.9 m/s时高空灯和地面灯诱虫数量较多。研究结果为利用昆虫雷达长期监测中哈边境昆虫迁飞提供基础数据,为深入探讨中哈边境区域害虫迁飞规律和监测预警提供科学依据。     

Pulsus Alternans During Halothane Anesthesia in a Dog

An adult dog with pyloric obstruction was anesthetized with thiamylal and halothane for surgical revision. When an ECG was attached, the QRS-complex rate was noted to differ dramatically from the peripheral pulse rate. A dorsal pedal arterial catheter was introduced, and direct arterial pressure measurements revealed a blood pressure waveform that alternated in amplitude. Blood pressure and ECG traces were recorded, and the condition was diagnosed as pulsus alternans. The inhalation anesthetic was changed to isoflurane, and the condition was resolved.     

飞行前后意大利蝗飞行肌及 能源消耗比较

意大利蝗(Calliptamus italicus)具有长距离迁飞行为,并常给迁入区造成严重损失。若要提高对其监测预警和防控水平,就需要掌握其飞行肌结构特征,分析其体内能源物质积累与飞行消耗的动态,因此本研究比较了意大利蝗吊飞前后飞行肌肌节长度、肌原纤维直径和线粒体含量差异及飞行不同距离虫体内糖原和甘油酯含量变化。结果表明,吊飞组与未吊飞对照组雌虫之间、雄虫之间线粒体含量均差异显著(P0.05)。意大利蝗雌成虫飞行超过2.8km后糖原消耗最多,为11.15mg·g~(-1),雄虫飞行2.1~2.8km时消耗最多,为16.10mg·g~(-1)。雌、雄成虫均在飞行距离大于2.8km后甘油酯消耗最多,分别为61.69和69.75mg·g~(-1)。意大利蝗飞行同时消耗糖类和脂肪两类能源物质,且雌雄成虫分别飞行超过2.8km和2.1~2.8km时糖原利用效率最大,飞行超过2.8km后甘油酯利用效率最大。本研究得出吊飞组个体能改变自身的飞行肌结构来适应飞行活动;且飞行过程中意大利蝗能同时利用糖类与脂类,糖类能快速产生能量以供起飞与短距离飞行,随后主要消耗甘油酯供长距离飞行。