红色开食料可提高雏鸡早期性能

现在，雏鸡出壳后头7d内的营养和健康综合策略公认是影响肉鸡生产性能的最重要的决定因素之一。 由于刚出壳的雏鸡由胚胎生活转为肉鸡饲养舍环境下的出壳后生活，其心血管系统、消化系统、免疫系统、呼吸系统（肺）和骨骼系统必须全部发挥作用（与此同时各系统在体积上大大增加），方能确保其生长和对疾病的抵抗力。     

DDGS将会给蛋鸡带来多少好处

研究显示,干酒糟及其可溶物(Distillers Dried Grains with Solubles,DDGS)对蛋鸡生产的收益有积极的影响而不会对生产性能产生消极作用(图1)。根据可再生燃料协会(Renewable Fuels Association)的统计数据显示,2007年美国的DDGS产量达1460万吨。这一饲料原料在蛋鸡日粮中通常为添加5%～15%。     

Treatment of canine atopic dermatitis with cetirizine, a second generation antihistamine: A single-blinded, placebo-controlled study

Cetirizine and placebo were administered orally as individual agents to 23 dogs with atopic dermatitis. The pruritus was satisfactorily reduced in 4/22 (18%) dogs that completed the trial with cetirizine. Two dogs vomited after administration of the active drug.     

An assessment of sanitation protocols for commercial transport vehicles contaminated with porcine reproductive and respiratory syndrome virus

The objective of this study was to develop and test a rapid (< 2 h) sanitation protocol designed for porcine reproductive and respiratory syndrome virus (PRRSV) positive commercial transport vehicles involving cold water washing and disinfection via fumigation using scale models of weaned pig trailers. The study consisted of 2 phases. Following experimental contamination of model trailers with PRRSV MN 30-100 (5 x 10(5)TCID50), phase 1 evaluated the presence or absence of PRRSV RNA by polymerase chain reaction (PCR) on swabs collected from the trailer interiors 0, 60, and 90 min after treatment. Phase 2 consisted of evaluating the infectivity of trailers 90 min posttreatment by monitoring changes in the PRRSV-status of naive sentinel pigs housed for 2 h. Treatments included washing only (treatment 1), washing plus formaldehyde fumigation (treatment 2), washing plus fumigation with glutaraldehyde-quaternary ammonium chloride (treatment 3), and washing plus overnight drying (treatment 4). Porcine reproductive and respiratory syndrome virus RNA was detected in all trailers (20 out of 20 replicates) at 60 and 90 min following the application of treatments 1 and 2. These trailers also contained infectious PRRSV, as determined by the infection of naive pigs housed in treated trailers and the testing of organic debris collected from the interior of trailers by swine bioassay. At 90 min posttreatment, all trailers treated with glutaraldehyde-quaternary ammonium chloride were PCR-negative, non-infectious to sentinel pigs, and swine bioassay negative. Similar results were observed in trailers allowed to dry for 8 h. Under the conditions of this study, it appears certain disinfectants may possess different levels of efficacy against PRRSV and PRRSV-positive models may be effectively sanitized in the absence of overnight drying.     

Multiple congenital epitrichial sweat gland hamartomas in a piglet

A case of multiple congenital epitrichial sweat gland hamartomas in a 2-day-old piglet is presented. The skin lesions were raised, ovoid to linear in configuration, alopecic, red-purple to pink, and cauliflower-like to cerebriform in appearance. Histological examination of skin specimens confirmed a diagnosis of epitrichial sweat gland hamartoma. Complete necropsy examination revealed no other lesions.     

Circuits of power: Environmental injustice from Bangkok's shopping malls to Laos’ hydropower dams

In what ways are lifestyles in urbanising Thailand, increasingly oriented towards shopping malls related to the threat to the wildlife and struggles for subsistence in distant Lao hinterlands? Our article answers this question by looking at the workings of electricity as the key infrastructure that connects these seemingly unrelated events and practices. We argue that the circulation of electricity flows along uneven channels, shifting injury and environmental harm across international borders. This circuit is perpetuating inequality and environmental injustice in the Lower Mekong. To demonstrate this claim, we analyse the electricity sector at numerous scales and locations – the urban scale in Bangkok, the country scale of Thailand and then Laos and the local community scale in Laos. We then discuss by what means various material and social processes and actors at these different scales form this circuit. Looking at circuits of power allows us to link the story of electricity consumption with that of production, with an emphasis on their extraterritoriality, multiplicity and boundaries. Our findings illustrate the effects of this circuit on spaces far from a thought‐of urban area. Furthermore, we demonstrate the ways in which these effects have produced inequality and injustice across borders.     

禽用液态饲料原料

近 2 0年来 ,有越来越多的液态饲料原料供家禽日粮之用。这些液态原料有许多好处 ,比如养分利用率高 ,用于饲料配合时有较大的灵活性 ,可提高制粒性能。本文系作者发表于 2 0 0 0年 9月召开的美国饲料工业协会液态饲料专题讨论会上     

Dirofilariasis in wild canids from the Gulf coastal prairies of Texas and Louisiana,U.S.A.

Heartworms, Dirofilaria immitis, were recovered from 17 out of 24 (71%) coyotes, Canis latrans, 38 out of 46 (83%) coyote × red wolf hybrids and all of 8 (100%) red wolves, Canis rufus gregoryi, collected from the Gulf coastal prairies of southeast Texas and southwest Louisiana. Intensities of infection ranged from 1 to 176 ($\text{x}\text{=25}$) worms per host. There was a significantly (P<0.05) higher intensity of infection in red wolves. Prevalence of heartworms increased significantly with increasing age. There were no significant differences between coyotes, hybrids and red wolves or between different host sexes in terms of prevalence. The female to male ratio of heartworms was close to unity (1.2:1) and was not correlated with worm burdens. Nematodes were primarily localized in the right heart, frequently extending into the pulmonary artery and the pulmonary arterial tree in the lungs. In 13 instances, 1–4 adult heartworms were recovered from the venae cavae. Pathological responses in the right heart were variable, depending on the intensity of infection. In severe infections, there were small areas of infarctive necrosis with mild to severe interstitial edema in the myocardium. Lesions in the pulmonary artery and pulmonary arterial trunk varied from mild focal hyperplastic intimal changes to extensive exudative villous endarteritis. The latter was characterized by a hyperplastic collagenous stroma with numerous histiocytes, plasma cells and eosinophils. Lung pathology varied from patchy to extensive areas of congestion, edema, hemorrhage, interstitial pneumonitis and infarction. In cases with heartworms in the venae cavae, hepatic changes were minimal and associated with liver changes such as passive congestion and centrolobular necrosis seen in cases without adult worms in the venae cavae. In heavily infected animals, hemosiderosis of the liver, spleen and kidneys was pronounced. A microfilaremia was noted in 46% of the infected wild canids. Microfilariae were observed in tissue sections of the myocardium, lungs, liver, kidney, spleen, lymph nodes, pancreas and appendix. Wild canids from this area are regarded as natural definitive hosts and primary reservoirs for heartworms and it appears that this infection is an important factor in the morbidity and mortality of these hosts.