猪胃溃疡的病因及防治

猪胃溃疡主要是指胃食管区粘膜出现角化、糜烂和坏死 ,或自体消化 ,形成圆形溃疡面 ,甚至胃穿孔。症状包括厌食、腹部不适、肠道运动异常导致便秘或腹泻和某些病例胃出血及黑粪症等。本病初期胃呈轻微出血 ,仅表现消化不良 ,人们往往不易察觉。当胃穿孔后 ,伴发急性弥慢性腹膜炎时 ,可迅速死亡。常呈散发 ,在一群猪内引起个别猪死亡。本病可发生于任何年龄 ,但多见于 50 kg以上生长迅速的猪及饲养在单体限位栏内的母猪。一年四季都有发病 ,但以炎热的夏秋季节较多见。1　病因1 .1　饲料因素　 (1 )饲料粗硬不易消化。(2 )饲料中缺乏足够的纤…     

Mortality associated with gastric ulceration in swine

On a large swine operation, necropsy revealed that 39 of 146 (27%) pigs during one week in April and 37 of 137 (27%) pigs during one week in June died from hemorrhage due to gastric ulceration. Contributory factors may have been feed withdrawal one day per week and feeding finely ground pellets.     

狐狸霉玉米中毒

1　发病情况　2 0 0 0年 1 1月 2 5日 ,巴营森林万里沟养殖场技术员毛某求诊 ,称该养殖场人工圈养的 48只狐狸 ,于 1 1月 1 1日开始有 6只不食、呕吐、腹泻 ,以后发病数陆续增多 ,均表现为减食或停食、呕吐、下痢 ,至今全场狐狸几乎全部发病 ,已死亡 8只。经了解 ,该场采用第四     

Detection of Arcobacter species in gastric samples from swine

Swine stomachs were surveyed for evidence of Arcobacter spp. and Helicobacter spp. infections associated with gastric ulceration. A nested PCR test targeted to the 16S rRNA was developed to detect many Arcobacter spp. and Helicobacter spp. An internal oligonucleotide probe was used for differentiation and confirmation of the PCR product. Tissue samples were obtained from the nonglandular and glandular regions of 86 swine stomachs. Evidence of infection with these microbes was detected in 51%, with 77% of the positive samples being identified as A. butzleri using a highly specific probe. Nonglandular stomach samples (44%) were more likely to be positive by PCR than samples from the glandular (23%) region. Gross lesions of any stage of gastric ulceration, ranging from parakeratosis, erosions and ulceration, were observed in 24% of stomachs examined. Of 21 samples with lesions, 52% were positive by the broadly reactive PCR assay for Arcobacter spp. and Helicobacter spp. The majority of PCR-positive samples (75%) had no gross lesions. When a single step PCR assay that was more specific for Arcobacter spp. was used on the nonglandular stomach samples, 10.4% of the 86 samples were positive. Arcobacter spp. were culture from four of the sample stomachs. Partial sequencing of the 16S rRNA gene identified the isolates as A. butzleri (n = 2), A. cryaerophilus, (n = 1), and a mixed culture of A. butzleri and another Arcobacter spp. (n = 1). A single step PCR assay targeted to the urease gene and culturing methods were used to screen for H. pylori or other closely related urease positive bacteria, but none were found.     

饲料原料粉碎过细引起猪胃肠溃疡的病例分析

笔者在养猪技术服务过程中发现一个现象：农村相当多的中小型养猪场的饲料生产车间，基本是所有阶段的猪只仅使用一个规格的玉米筛片，而且是选择最细（大多孔径为1.5 mm）的筛片来破碎饲料原料，也有的是部分小型饲料加工厂的老板为迎合部分使用者"饲料粉碎越细，消化利用率越高"的需求而为之。这种做法是不讲究科学的表现，也是对猪的身体健康十分有害的，作为饲料生产厂家不按科学要求生产饲料，这也是对养猪用户及其不负责任的具体体现。文章就"饲料原料粉碎过细引起猪胃肠溃疡"的典型案例进行简单的描述与分析，以期对部分中小型猪场饲料粉碎工艺提供技术及理论依据。