Listeriosis

The signs of bovine listeriosis include depression and variable cranial nerve deficits indicative of brain stem inflammation. Because a wide range of cranial nerve deficits exists in bovine listeriosis patients, a thorough neurologic examination and cerebrospinal fluid analysis are essential to accurate diagnosis. Treatment should consist of intensive antibiotic therapy owing to the intracellular location of the causative organisms and should also address metabolic acidosis in those patients with loss of buffer because of excessive salivation. The public health implications of bovine listeriosis require the veterinarian to protect all persons attending the bovine patient affected with listeriosis.     

动物李氏杆菌病

李氏杆菌病主要是由单核细胞增多性李氏杆菌（Ｌｉｓｔｅｒｉａｍｏｎｏｃｙｔｏｇｅｎｅｓ）引起动物的一种疾病,其致死率较高。自１９２６年Ｍｕｒａｙ等首次分离到本病原体以后,现已呈世界性分布。它作为动物致病菌和腐生植物致病菌而广泛存在于环境中,并且已知它与...     

Some New Data on Angolan Muridae

The stomach content of four species of mullet (Mugil cephalus, Liza dumerili, Liza richardsonii and Liza tricuspidens), was analyzed. The nature of the stomach content gave some indication of the areas in which each species of mullet had been feeding, the type of substratum from which each had been feeding and the diatom species which each ate.     

鸡李斯特杆菌病的病理学诊断

李斯特杆菌病是一种散发性人畜共患的传染,其病原李斯特杆菌除感染牛以外,还见于猪、绵羊、山羊等多种动物,鸡发病较少发现,其病理学变化少有报道.笔者最近在湖北荆州市某一个体饲养七彩山鸡的种鸡场发现22日龄左右的雏鸡陆续死亡,经确诊为李斯特杆菌病.     

Listeriosis in a Holstein cow.

Bovine listeriosis is a sporadie bacterial infection most commonly manifested by encephalitis or meningoencephalitis in adult animals. Cattle fed poorly fermented haylage or corn silage are at increased risk. Mortality is high without early antibiotic and supportive therapy. Listeria monocytogenes can affect many species and is a public health concern.     

雏鸭李氏杆菌与曲霉菌混合感染的诊治

曲霉菌病在雏鸭常有发生,李氏杆菌病在鸡、猪均有感染,而雏鸭曲霉菌与李氏杆菌混合感染的报道尚属少见。笔者在2007年7月遇到一起病例,经发病情况、临床症状、剖检变化与实验室检查,综合诊断为李氏杆菌与曲霉菌混合感誊。现将诊治经过报道如下。     

Orbit orientation and eye morphometrics in giraffes (Giraffa camelopardalis)

Giraffe are thought to have excellent vision. We measured eye size, orbit orientation and retina surface area in 27 giraffes of both sexes ranging in age from neonates to mature adults (>10 yrs), to assess how it changes with growth, whether their eye anatomy correlates with their apparently excellent vision and lifestyle, and we have compared our findings with those for other large mammals to assess whether giraffe eye anatomy is unique. We found that giraffe eye volume increases from 33 cm³ at birth to approximately 65 cm³ in adults. The focal (axial) length increases from c. 40 to 48 mm in adults and retina surface area from c. 3000 mm² at birth to 4320 mm² in adults. The orbital axis angle at birth is c. 73° and the horizontal visual field mainly monocular and panoramic. With age the axis angle becomes more acute to c. 50° in adults and the visual field more binocular, changes that occur concurrently with increasing neck length. These results show that the giraffe eye and retinal surface area are larger than in all other ungulates, and their visual fields more binocular, attributes which are consistent with the idea that they have excellent vision.     

山羊单增李斯特杆菌病的诊断与防治

赣西某养殖场山羊出现转圈运动等神经症状、单侧眼睛失明和呼吸困难,导致近20只山羊死亡。为确定病原菌并进行有效的防治,对送检的3只病死羊进行病理剖检,并采集肝脏、脾脏和脑组织进行病原菌的纯化培养、LB二次增菌选择性分离培养、革兰氏染色、生化试验和16S rRNA测序分析;为确定病原菌致病力,进行小鼠和家兔的动物回归试验;选用头孢唑啉、头孢曲松钠、青霉素、万古霉素等30种抗菌药进行病原菌的体外抑菌试验。结果显示,从两只病羊的脑组织中分离得到两株革兰氏阳性细菌,生化试验、16S rRNA序列测定、动物回归试验确认分离菌为单增李斯特杆菌,二者高度同源（100.0%）,与多株李氏杆菌同源性均高达99%以上,且对小鼠和家兔均有较强的致病力。该分离菌对头孢唑啉、哌拉西林、羧苄西林、四环素、多西环素、麦迪霉素、红霉素、万古霉素和氯霉素高度敏感,但对第2、3代头孢菌素类抗生素、苯唑西林、复方新诺明等抗菌药耐药。该养殖场应参考药敏试验结果采取综合防治措施,从而保障山羊及其肉制品的食品安全。     

Listeriosis in a cockatiel (Nymphicus hollandicus)

Listeriosis was diagnosed in a 4-yr-old female cockatiel (Nymphicus hollandicus) that died after exhibiting clinical signs that included a fluffed-up appearance, weakness, and loss of weight of several days duration. Grossly, the bird was moderately emaciated, and the liver and spleen were enlarged. Microscopically, there was mild-to-moderate inflammation associated with rod-shaped, gram-positive bacteria in the liver, spleen, kidneys, adrenal glands, bone marrow, and esophagus. Listeria monocytogenes was isolated from the liver, trachea, and intestine. The isolate was identified as type 1 by agglutination with specific antisera, and it further identified as belonging to serovar group 1/2a, 3a by multiplex polymerase chain reaction assay. Listeria monocytogenes also was detected in affected tissues by immunohistochemistry.