Use of anorganic rhodanides in the breeding of piglets

Breeding results of sows reared under conventional conditions could be raised by treating them with 20 mg potassium rhodanide/day 14 days before up to 14 days after farrowig. An increase of the rhodanide level could be demonstrated in the colostrum providing a higher rhodanide supply in piglets of treated sows.     

二阶段早期断奶乳猪配合饲料的配制

所谓二阶段早期断奶乳猪配合饲料,是指将乳猪从出生到60日龄划分为从出生到断奶和断奶到60日龄2个阶段,根据乳猪在这2个阶段的发育特点和营养需要,分别为其配制不同的配合饲料,充分发挥乳猪生长潜能,降低饲料成本,使养猪户得到更大利润。如何配制符合我国养猪业情况的二阶段早期断奶乳猪配合饲料,我们认为应重视以下几个问题。1　配制早期断奶乳猪配合饲料前必须掌握以下3点11　尽早使乳猪适应固体饲料　配制哺乳期仔猪料的主要目的,是为了使乳猪尽早地适应固体饲料,为它们进入生长肥育阶段做准备。如果乳猪不能很快适应生长肥育阶段的各种…     

Nonsuppurative encephalitis in piglets after experimental inoculation of Japanese encephalitis flavivirus isolated from pigs

Nonsuppurative encephalitis was experimentally induced in 3-week-old piglets by a single intravenous inoculation of either of two strains (IB 2001 or AS-6) of Japanese encephalitis flavivirus (JEV) isolated from field pigs. The lesions, which consisted of neuronal necrosis, neuronophagia, glial nodules, and perivas-cular cuffing, were distributed in the cerebrum, midbrain, pons, medulla oblongata, and cerebellum, particularly in the gray matter of the frontal and temporal lobes and thalamus. The gray matter of the spinal cord of piglets that were given the AS-6 strain also was affected. JEV antigen was immunohistochemically detected in the cytoplasm of the nerve cells in the cortex of the frontal and temporal lobes and in the gray matter of the thalamus and midbrain. Two JEV strains isolated from field pigs exhibited neurovirulence, inducing nonsup-purative encephalitis in piglets.     

大白猪的选育研究与推广

通过对大白猪重新组建核心群，并运用不完全闭锁的群体继代选育方法，对大白猪进行了连续5年的测定选育与推广，使各项指标均已达到或超过了育种目标，胎均产仔数为10．82头，活产仔数为10．19头，21日龄窝重为52．27kg。场内测定公猪日增重为754．87g/日，背膘1．33cm，母猪日增重为748.77g/日，背膘1.26cm。几年来，共推广大白、长大或大长二元杂种猪12000头。     

Prevalence of chromosomal aberrations in breeding pigs in Spain

The main aim of this study was to document the prevalence of chromosomal aberrations found to date on the pig population in Spain, a country in which this production sector has a critical role, being the fourth country in the world in pig production and the second one within the European Union. The total number of animals studied was 849, and the founded frequency of carrier pigs with chromosomal alterations was 3.8%. When only the structural alterations were considered, the prevalence in males was 3.3%. This percentage is far from the 0.5% of carrier boars that has been estimated in France, a country where there is a systematic cytogenetic screening of future breeding pigs since 1992. In order to avoid the productive and economic losses caused by karyotype alterations in breeding pigs, it would be important to establish a cytogenetic screening of breeding animals at artificial insemination centres and genetic selection farms.     

Ileal digestibility of protein and amino acids from canola meal in weaned piglets and growing pigs

Two experiments were conducted to measure the apparent ileal digestibility coefficients (AID) of protein and amino acids from canola meal (CM) and a pelleted canola meal (PCM) and their effect on specific activity (SA) of pancreatic proteases in weaned piglets and growing pigs. In experiment one, 24 piglets weaned at 17 days and weighing 5.5 kg were used. Treatments were a reference diet with 200 g of crude protein (CP) kg^− 1 elaborated with casein (C) as the sole protein source, a diet containing C–CM and a diet containing C–PCM. These diets were obtained using the reference diet plus 100 g kg^− 1 of CM or PCM that substituted an isoproteic mixture of casein and maize starch from reference diet, so that the AID coefficients for their protein and amino acids could be calculated by difference. In experiment two, nine castrated pigs weighing 39.5 kg were used. Treatments were a reference diet with 160 g of CP kg^− 1 elaborated with casein (C) as the sole protein source, diet C–CM and diet C–PCM. These diets were obtained using the reference diet plus 300 g kg^− 1 of CM or PCM that substituted an isoproteic mixture of casein and maize starch from reference diet. In piglets, the AID coefficients for casein were highest (P < 0.05), those of PCM were intermediate, and those of CM were the lowest. In older pigs, the AID coefficients for casein were highest, and those of CM and PCM were similar (P > 0.05). The SAs of chymotrypsin, trypsin and carboxypeptidases A and B were lower in piglets than in heavier pigs. Moreover, the SAs of trypsin, chymotrypsin, and carboxypeptidase B were lower (P > 0.05) in animals fed casein. The results showed in piglets that whereas CM was less digestible, pelleted canola meal improved protein and amino acid ileal digestibility, resulting in similar AID coefficients to those of growing pigs.     

Actinobacillus equuli as a primary pathogen in breeding sows and piglets

The death of over 300 sows in 2 months on a 3000 sow farrow-to-isowean operation in Manitoba was attributed to infection with Actinobacillus equuli. This pathogen commonly infects foals, and is rarely reported in swine. Our report is the second recently published case of this pathogen in North American swine.     

Gluconeogenetic capacity of suckling piglets and young pigs]

No marked gluconeogenetic performance was recordable from nursed piglets aged, between one and five days, in response to ACTH nor glucocorticosteroid application. Store pigs, aged twelve weeks, however, exhibited glucose rises of 34 per cent one hour after injection or 55 per cent three hours from ACTH application. The point was made, in an attempt to elucidate the above findings, that in newborn piglets, few days after birth, the gluconeogenetic capacity is insufficient because of functional immaturity of the liver. The behaviours of several metabolites in the liver and muscles of store pigs were examined under differentiated model conditions to check up and verify that view.     

Leptospirosis in pigs: Vaccination to control perinatal deaths in piglets

Extract

Perinatal deaths are common among piglets in New Zealand. They tend to occur in epidemics, they are independent of the type of soil or of feeding practices, and are most common in the litters of young sows and of those recently introduced into the piggery. Affected sows may show signs of sickness and inappetence before farrowing, and the piglets are usually born dead (delivered in intact foctal membranes) or they may be weak and die within 24 hours of birth. A sow that has once delivered dead piglets rarely, if ever, does so at later farrows.     

规模猪场种猪布鲁氏菌病血清学调查

猪布鲁氏菌病是由猪布鲁氏杆菌（B.suis）引起的流产、睾丸炎等为特征的人畜共患病,危害畜牧业健康与公共卫生安全。为了了解延平区规模猪场种猪布鲁氏菌病感染情况,2013年对23个规模猪场901份血清样品采用琥红平板疑集试验和试管疑集试验进行初检和确诊。结果表明：被检的23个规模猪场有1个猪场检出阳性,被检血清中1份样品阳性,猪场阳性率为4.3%,样品阳性率为0.1%。     

发酵床养猪的成败浅析

发酵床养猪已被广泛推广,打破了养猪高污染、高耗能、高投入的瓶颈,达到养猪省料、省水、省劳力,从而提高了猪免疫力,降低发病率,减少死亡率,提高出栏率,达到了     

乌兰察布市种猪遗传评估方案

改革开放以来,我国养猪业得到了高速发展,成为世界猪肉生产第1大国。猪肉是我国人民摄入体内动物蛋白质的主要来源,在肉食品消费中占67％左右。猪肉生产直接影响到我国人民的生活水平,随着农业结构调整,养猪业已成为增加农民收入和广大农民致富的重要手段,并逐步成为农村经济的支柱产业。