Effect of Humidity on Broiler Health and Corresponding Measures     

SUN Yong-bo  LUAN Su-jun  WANG Ya  SA Ren-na  ZHANG Hong-fu 《中国畜牧兽医》2017,44(8):2533-2539

With the development of intensive broiler raising, the influence of environmental factors on broiler health are increasingly prominent. Relative humidity is one of the most important indicators of broiler house environment.But in the production process of broiler farming,it is often neglected on the management of humidity in house. Neither low humidity nor high humidity is conducive to the healthy growth of broilers. It is of great significance to strengthen the monitoring of the humidity in broiler houses and study the effects of relative humidity on the health of broiler for guiding the rational control of the humidity in broiler houses and the development of healthy breeding. In this paper, we summarized and analyzed the effects of relative humidity on thermal regulating,growth performance, reproductive performance, blood parameters, meat quality and respiratory tract of broilers, and the monitor and control measures of humidity in the poultry house, aimed to provide a reference for further research on the mechanism of relative humidity affects broiler health and rational regulation of humidity in broiler house.  相似文献   

Effects of low‐intensity pulsed ultrasound on radiographic healing of tibial plateau leveling osteotomies in dogs: a prospective,randomized, double‐blinded study          下载免费PDF全文

Nina R. Kieves DVM  DACVS‐SA  DACVSMR  CCRT  Sherman O. Canapp DVM  MS  DACVS  DACVSMR  Peter J. Lotsikas DVM  DACVS  DACVSMR  Scott A. Christopher VMD  CCRP  Christopher S. Leasure DVM  Debra Canapp DVM  DACVSMR  Patrick R. Gavin DVM  PhD  DACVR  DACVRO 《Veterinary surgery : VS》2018,47(5):614-622

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Unique presentation of normolipaemic cutaneous xanthoma in a cat     

PA Ravens  LJ Vogelnest  SA Piripi 《Australian veterinary journal》2013,91(11):460-463

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In vitro susceptibilities of feline and canine Escherichia coli and Pseudomonas spp. isolates to ticarcillin and ticarcillin–clavulanic acid     

AB Bennett  PA Martin  SA Gottlieb  M Govendir 《Australian veterinary journal》2013,91(5):171-178

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Bovine colostrum-induced anaemia in a 2-week-old lamb     

RE Ruby  CC Balcomb  SA Hunter  KE Lawrence 《New Zealand veterinary journal》2013,61(1):82-83

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Urethane anesthesia in adult female rats: preliminary observations     

FJ  Golder  SA Robertson  A Valverde  DC Bolser 《Veterinary anaesthesia and analgesia》2003,30(2):115-115

Urethane is widely used as a rodent anesthetic in the laboratory setting, and is characterized as producing long‐lasting anesthesia. The purpose of this study was to evaluate the quality of anesthesia provided by a single dose of urethane based on the response to a noxious stimulus. If the quality of anesthesia was insufficient to prevent gross purposeful movement (GPM), isoflurane was also administered until no response to noxious stimulation occurred. Five adult Harlan Sprague Dawley rats (6 months of age, 250–300 g) were given urethane (1.4 g kg^?1 IP) and evaluated for 120 minutes post‐injection. If the rats became laterally recumbent by 20 minutes post‐injection, a large hemostat was positioned around the tail and the response to tail clamping was assessed. If no GPM occurred, an additional 20 minutes was allowed to elapse. If the rats were not laterally recumbent or GPM was present, they were placed in a chamber and isoflurane in oxygen was administered. Inspired isoflurane concentrations (ISO) were measured using a S/5 anesthetic gas analyzer (Datex‐Ohmeda Division, Helsinki, Finland) calibrated before each experiment with a standardized calibration gas mixture (DOT‐34 NRC 300/375 m 1014, Datex‐Ohmeda Division, Helsinki, Finland). A period of 20 minutes was allowed for equilibration to inspired ISO. The tail‐clamp stimulus was then re‐applied and the animal's response recorded. If GPM was absent, ISO was lowered by 10–20% and an additional 20 minute interval elapsed. In contrast, if GPM was present, ISO was increased by 10–20%. This procedure was repeated until the ISO required to prevent GPM was determined in duplicate. The position within the estrus cycle influenced pain thresholds in the rats. As such, a vaginal smear was prepared from each rat and the position in the estrus cycle was determined based on vaginal cytology. Rats were euthanatized at the end of the study period. All values were mean ± SD. Four rats became recumbent after urethane injection (time to recumbency: 45 ± 17 seconds). Of these, two rats (one estrus, one metestrus) did not require isoflurane supplementation for the duration of the study. The three remaining rats (two metestrus, one estrus) required isoflurane supplementation. The mean ISO required to prevent GPM was 0.26 ± 0.16%. Position within the estrus cycle did not appear to affect the animal's response to urethane. These results indicate that urethane anesthesia is not long lasting in all rats and provides variable quality of anesthesia. This is of particular concern in the laboratory setting where muscle relaxants are often administered to rats shortly after urethane injection.  相似文献   

基于高温诱发树木多倍体的模糊PID温度控制器     

章玮玮  撒潮  李慧  李丽 《林业机械与木工设备》2006,34(4):24-27

针对树木枝芽的室外高温诱发多倍体处理,介绍了一种模糊PID温度控制器,该控制器具有显示温度、设定温度、自动控制温度等功能。控制器采用PID参数模糊自整定方法,充分发挥了其动态响应好、上升时间快、超调小的特点,具有较高的动态跟踪品质和稳态精度,并在实际应用中取得了较好的控制效果。  相似文献   

Demonstration of non-inferiority of a novel combination intramammary antimicrobial in the treatment of clinical mastitis     

MA Bryan  SY Hea  SA Mannering  R Booker 《New Zealand veterinary journal》2016,64(6):337-342

AIM: To test the non-inferiority of a novel combination intramammary product containing penicillin and cloxacillin to a reference intramammary product containing oxytetracycline, oleandomycin, neomycin and prednisolone with regard to bacteriological cure and clinical cure.

METHODS: Clinical cases of mastitis were sourced from 30 spring-calving dairy farms in the Southland region of New Zealand. Affected quarters were infused three times at 24 hourly intervals with either the novel combination product containing 1?g penicillin and 200?mg cloxacillin, or a reference product containing 200?mg oxytetracycline, 100?mg oleandomycin, 100?mg neomycin and 5?mg prednisolone. Cows were enrolled when a farmer detected a case of clinical mastitis. Milk samples were collected for microbiological culture immediately before treatment (Day 0) and on Days 9, 16 and 23. Bacteriological cure was compared for 187 and 178 quarters treated with the reference and novel product, respectively, and clinical cure was compared for 235 and 223 quarters, respectively. Non-inferiority was assessed by calculating the difference in cure rates between the two products and constructing a 95% CI around the difference, using the variance inflation factor to account for herd level clustering. The non-inferiority margin was 20% for both bacteriological and clinical cure. Generalising estimating equation models were used to determine predictor variables.

RESULTS: The bacteriological cure percentage, adjusted to account for herd-level clustering, was 8.5 (95% CI=?1.7–21.8)% higher for quarters treated with the novel than the reference product. The adjusted clinical cure percentage was 0.3 (95% CI=?11.2–12.0)% higher for clinical quarters treated with the novel than the reference product. Bacterial species was the only covariate for bacteriological cure (p=0.003), and quarter score at enrolment (indicating udder inflammation) was the only covariate for clinical cure (p=0.032) in the multivariable models.

CONCLUSION: The novel combination product was demonstrated to be non-inferior to the reference product with regards to both bacteriological cure and clinical cure.

CLINICAL RELEVANCE: Clinicians treating mastitis now have access to this novel combination intramammary product, and demonstration of its non-inferiority compared to the existing reference product will provide options for treatment approaches. The novel product contains fewer antimicrobials; which are of a narrower spectrum of activity.  相似文献   

木材缺陷图像的灰度形态滤波     

王国柱  周海宾  李文彬  撒潮 《木材工业》2005,19(5):17-19

介绍数学形态学中的灰度形态滤波方法,给出对木材缺陷图像进行闭、开运算处理后的仿真图像实例,利用木材缺陷图像截面灰度分布对处理效果进行分析.结果表明:采用灰度形态滤波方法对木材缺陷图像进行滤波处理,可有效去除木材缺陷图像中的噪声,改善图像的视觉效果,提高后期缺陷边缘检测的精确度,从而证明该方法对木材缺陷图像进行滤波处理是可行的.  相似文献   

The Effect of Examiner Variability on Multiple Canine Stifle Kinematic Gait Collections in a 3‐Dimensional Model          下载免费PDF全文

Bryan T. Torres DVM  DACVS‐SA  Peter J. Gilbert BVSc  MVetSc  DACVS‐SA  Lisa R. Reynolds BS  RVT  Yang‐Chieh Fu PhD  Judith A. Navik MS  Andrew Sornborger PhD  Steven C. Budsberg DVM  MS  DACVS 《Veterinary surgery : VS》2015,44(5):581-587

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