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排序方式: 共有374条查询结果,搜索用时 15 毫秒
101.
AV Pereira SA Pereira IDF Gremião MP Campos AMR Ferreira 《Australian veterinary journal》2012,90(11):448-450
This study compared the sensitivity of acetate tape impression and skin squeezing with that of deep skin scraping for the diagnosis of demodicosis in dogs. Demodex canis was detected in 100% of acetate tape impressions obtained after skin squeezing and in 90% of deep skin scrapings. There was a significant difference (P < 0.001) between the techniques in the total number of mites detected. Acetate tape impression with skin squeezing was found to be more sensitive than deep skin scraping and is an alternative diagnostic method for canine demodicosis. 相似文献
102.
S Saifzadeh R Hobbenaghi S Asri‐Rezaei F Shokouhi SJ B Dalir‐Naghadeh M Rohi S 《Reproduction in domestic animals》2008,43(6):678-684
A novel technique [Section‐Ligation‐Release (SLR)] was evaluated for castration in the horse. Clinical traits, serum testosterone concentrations after challenge with human chorionic gonadotrophin (hCG), and histopathological changes of the testicular tissue were assessed. Five stallions, aged 24–48 months, were castrated using SLR technique under general anaesthesia. Both spermatic cords in each stallion were exposed at the scrotal neck by two 5‐cm long incisions, followed by sharp dissection through the parietal vaginal tunic. Both vascular and non‐vascular structures in the cords were triple clamped, transected and ligated. Both testes were left in situ. Serum testosterone concentrations were measured pre‐operatively and at 2 months after castration following IV administration of 1 × 104 IU of hCG. Both testes from each castrate were collected at 2 months for histopathologic examination. SLR castration was successfully achieved. Moderated scrotal and preputial swelling was the only experienced short‐term complication. Serum testosterone concentrations were significantly lower than basal pre‐operative levels at 2 months after castration, and did not respond to hCG. On histopathology, hyalinization of the seminiferous tubules and loss of testicular interstitial tissue were indicative of complete avascular necrosis. This novel primary closure castration technique of stallion is a simple practical method, with minimal post‐operative complications; and could be safely advocated as an alternative to the traditional castration techniques allowing for second intention healing of scrotal wounds. 相似文献
103.
秸秆还田是培肥地力、改良土壤的重要措施。内蒙古高原向松辽平原过渡地带春玉米区,玉米长期连作导致了耕层变薄、土壤次生盐渍化等土壤退化问题。采用田间定位试验的方法,研究连续多年(8、5、2年)秸秆旋耕还田条件下对土壤微生物的影响。结果表明,秸秆还田土壤中最丰富的细菌类型为变形菌门(Proteobac-teria),其次为放线菌门(Actinobacteria)、芽单胞菌门(Gemmatimonadetes)、拟杆菌门(Bacteroidetes);真菌类型为子囊菌门(Ascomycota)和担子菌门(Basidiomycota)。随着秸秆还田年限的增加,变形菌门和酸杆菌门(Acidobacteria)相对丰度增加、放线菌门相对丰度下降,拟杆菌门相对丰度较稳定;子囊菌门、担子菌门、接合菌门(Zygomycota)相对丰度先下降后上升,而球囊菌门(Glomeromycota)和壶菌门(Chytridiomycota)相对丰度变化规律相反;属水平上Sphingomonas、Lysobacter、Hannaella相对丰度先上升后下降,而Leptosphaeria和Mono-dictys相对丰度变化规律相反;Pseudarthrobacter、Fusarium相对丰度下降,Gaiella相对丰度较稳定;Guehomyces相对丰度增加;并且细菌和真菌相对丰度拐点均出现在秸秆还田5年后。随着秸秆还田年限的增加,土壤细菌和真菌多样性均有所降低;秸秆还田与秸秆不还田土壤的差异物种有Aquicella、Fusicolla和Spizellomyces;由此可推测,秸秆还田增加土壤氮和钾含量,减少病害;试验区连续多年的玉米秸秆还田改变了土壤微生物群落组成,玉米秸秆连续还田5年后土壤微生物多样性有下降趋势。 相似文献
104.
DJ Leatherman SA Valdez BG Grant JC Cannon 《Journal of Equine Veterinary Science》1999,19(12):776, 778
Protein fractions of cerebral spinal fluid samples were analyzed in an effort to find a reliable, minimally invasive and cost effective method of diagnosing cervical vertebral myelopathy. There were six separate protein fractions analyzed by electrophoresis. In this study we specifically looked for a post beta spike in horses with spinal cord compression. There was no correlation in our study between horses with a post beta spike and CVM as diagnosed by a myelogram. 相似文献
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108.
Deyab M. S. D. El-Saidy Magdy M. Gaber Ahmed SA. Abd-Elshafy 《Journal of the World Aquaculture Society》2005,36(3):311-319
Abstract— A12-wk feeding experiment was conducted to study the feasibility of utilizing cluster bean seed meal (CBM) as a replacement for fishmeal in the diets for common carp Cyprnus carpio fingerlings. The replacement levels of cluster bean meal protein in the diets were 25, 50, 75, and 100% of the total fishmeal protein. All diets were isonitrogenous at 33.1% crude protein and isocaloric at 4.8 Kcal/g. There were significant differences in the final individual weights, weight gains, specific growth rates (SGR %/d), feed conversion ratios (FCR), feed efficiency ratio (FER), protein efficiency ratios (PER), and feed intake among fish group ( P × 0.05). Common carp fed the diet containing 50% (CBM) exhibited comparable growth to those fed a fishmeal-based diet. Digestibility of protein, energy and lipid decreased with increasing levels of CBM above 50% of total fishmeal replacement in the diet. Incorporation of CBM in diets significantly affected the dry matter, protein, and energy of whole fish body. These results suggest that CBM can replace 50% of the fishmeal in diet for common carp. 相似文献
109.
OBJECTIVE: To determine the survival time of Mycobacterium avium subsp paratuberculosis in amitraz-based cattle dip fluid derived from an active dip site in northern New South Wales. PROCEDURE: Following inoculation of triplicate 5 L containers with faeces (0.5 g/L) from a clinical case of bovine paratuberculosis, samples collected up to 8 weeks after inoculation were examined by conventional and radiometric culture. M a paratuberculosis colonies were enumerated on solid media. RESULTS AND CONCLUSIONS: M a paratuberculosis survived in amitraz cattle dip fluid for up to 2 weeks, but not 3 weeks. Where 1% of solids in dip fluid is derived from a clinical case of paratuberculosis, dip fluid may contain viable M a paratuberculosis for at least 2 weeks. These findings have implications for the management of cattle dip sites. 相似文献
110.
The purpose of this experiment was to study the effects of Gymnadenia conopsea polysaccharide (GCP) extract on growth performance, meat quality and antioxidant function house-fed mutton sheep under oxidative stress, so as to provide experimental basis for extensive research and development of Gymnadenia conopsea and its extracts. Twenty 6-month-old healthy male Small-Tailed Han sheep with body weight of (35.0 ±4.0) kg were randomly divided into two groups. The experimental group (n=10) and control group(n=10). The whole experiment lasted for 42 d and was divided into 3 periods: the first 15 days were the blank period; the middle 15 days were the treatment period; the last 12 days were the observation period ofter modeling. From the first day of the treatment period, the control group was fed with basal diet, and the experimental group was fed pellet basal diet containing 30 mg·kg-1 GCP extract. On the 15th day of the treatment period, the sheep in each group were intraperitoneally injected with 10 mg·kg-1 Diquat solution according to sheep body weight(BW), and then fed for another 12 days. On the 1 st, 15th, 30th, 33rd, 36th, 39th and 42nd morning of the whole experimental period, fasting weight and blood samples were collected before feeding. The serum was separated and the antioxidant indexes (SOD, GSH-Px, T-AOC, MDA) in serum were determined. On the 42nd day of the whole experimental period, 5 sheep randomly selected from each group were slaughtered and meat samples were collected to determine the meat quality. The results showed that the addition of GCP extract to the diet of the sheep could increase the average daily feed intake (P<0.05). When the body was subjected to oxidative stress, the indexes of daily gain and antioxidant enzymes recovered rapidly on experimental group, the mutton drip loss decreased significantly, and the mutton sheer force increased significantly(P<0.05). The results indicated that GCP extract could improve the growth performance of mutton sheep, and alleviated the decline of growth performance and antioxidant performance caused by oxidative stress, and had a certain effect of antioxidant stress. 相似文献