细化搜索
结果 481-490 的 789
Clinical disease and lung lesions in calves experimentally inoculated with Histophilus somni five days after metaphylactic administration of tildipirosin or tulathromycin 全文
2016
Confer, Anthony W. | Snider, Timothy A. | Taylor, Jared D. | Montelongo, Marie | Sorensen, Nicholas J.
OBJECTIVE To compare clinical disease and lung lesions in calves experimentally inoculated with Histophilus somni 5 days after metaphylactic administration of tildipirosin or tulathromycin. ANIMALS Twenty-four 3-month-old Holstein and Holstein-crossbreed steers. PROCEDURES Calves were randomly allocated to 3 groups of 8 calves. On day 0, calves in group 1 received tildipirosin (4 mg/kg, SC), calves in group 2 received tulathromycin (2.5 mg/kg, SC), and calves in group 3 received isotonic saline (0.9% NaCl) solution (1 mL/45 kg, SC; control). On day 5, calves were inoculated with 10 mL of a solution containing H somni strain 7735 (1.6 × 109 CFUs/mL, intrabronchially; challenge). Calves were clinically evaluated on days 5 through 8 and euthanized on day 8. The lungs were grossly evaluated for evidence of pneumonia, and bronchial secretion samples underwent bacteriologic culture. RESULTS The mean clinical score for each group was significantly increased 12 hours after challenge, compared with that immediately before challenge, and was significantly lower for tildipirosin-treated calves on days 6, 7, and 8, compared with those for tulathromycin-treated and control calves. The mean percentage of lung consolidation for tildipirosin-treated calves was significantly lower than those for tulathromycin-treated and control calves. Histophilus somni was isolated from the bronchial secretions of some tulathromycin-treated and control calves but was not isolated from tildipirosin-treated calves. CONCLUSIONS AND CLINICAL RELEVANCE Results indicated that metaphylactic administration of tildipirosin to calves 5 days prior to H somni challenge prevented subsequent culture of the pathogen from bronchial secretions and was more effective in minimizing clinical disease and lung lesions than was metaphylactic administration of tulathromycin.
显示更多 [+] 显示较少 [-]Breed- and age-related differences in canine mammary tumors 全文
2016
Kim, Hyun Woo | Lim, Ha-Young | Shin, Jong-II | Seung, Byung-Joon | Ju, Jung-Hyung | Sur, Jung-Hyang
Triple-negative breast cancer is a type of breast cancer that does not express the genes for estrogen receptor (ER), progesterone receptor (PR), and human epidermal growth factor receptor-2 (HER-2). It is an important and clinically relevant condition as it has a poor prognosis and is difficult to treat. Basal-like triple-negative cancer is highly prevalent in both African-Americans and adolescents. We therefore examined whether such a cancer likewise occurs in specific breeds and age groups in dogs, focusing on basal-like triple-negative cancer in particular. In this study, 181 samples from dogs with malignant mammary carcinoma from the 5 most common breeds and 2 age groups in Korea were analyzed. Histological classification and molecular subtyping, including assessment of immunohistochemical findings, were carried out. Twenty-five of 28 (89.3%) triple-negative carcinomas were identified as basal-like triple-negative carcinomas. Analysis of associations of classified factors revealed that the shih tzu breed (9/25, 36.0%) and advanced-age (19/25, 76.0%) groups were characterized by higher prevalence of basal-like triple-negative tumors with diverse histological types and of a higher grade. These results suggest that breed- and age-related differences can be identified in canine mammary carcinoma and, notably, in the shih tzu breed and at older ages. Further investigation of these distinguishing characteristics of the shih tzu breed is warranted.
显示更多 [+] 显示较少 [-]Effects of regional limb perfusion volume on concentrations of amikacin sulfate in synovial and interstitial fluid samples from anesthetized horses 全文
2016
Godfrey, Jennifer L. | Hardy, Joanne | Cohen, Noah D.
OBJECTIVE To evaluate the effect of volume of IV regional limb perfusion (IVRLP) on amikacin concentrations in synovial and interstitial fluid of horses. ANIMALS 8 healthy adult horses. PROCEDURES Each forelimb was randomly assigned to receive IVRLP with 4 mL of amikacin sulfate solution (250 mg/mL) plus 56 mL (total volume, 60 mL) or 6 mL (total volume, 10 mL) of lactated Ringer solution. Horses were anesthetized, and baseline synovial and interstitial fluid samples were collected. A tourniquet was placed, and the assigned treatment was administered via the lateral palmar digital vein. Venous blood pressure in the distal portion of the limb was recorded. Additional synovial fluid samples were collected 30 minutes (just before tourniquet removal) and 24 hours after IVRLP began; additional interstitial fluid samples were collected 6 and 24 hours after IVRLP began. RESULTS 30 minutes after IVRLP began, mean amikacin concentration in synovial fluid was significantly greater for the large-volume (459 μg/mL) versus small-volume (70 μg/mL) treatment. Six hours after IVRLP, mean concentration in interstitial fluid was greater for the large-volume (723 μg/mL) versus small-volume (21 μg/mL) treatment. Peak venous blood pressure after large-volume IVRLP was significantly higher than after small-volume IVRLP, with no difference between treatments in time required for pressure to return to baseline. CONCLUSIONS AND CLINICAL RELEVANCE Study findings suggested that large-volume IVRLP would deliver more amikacin to metacarpophalangeal joints of horses than would small-volume IVRLP, without a clinically relevant effect on local venous blood pressure, potentially increasing treatment efficacy.
显示更多 [+] 显示较少 [-]Efficacy of Fostera PRRS modified live virus vaccine against a Canadian heterologous virulent field strain of porcine reproductive and respiratory syndrome virus 全文
2016
Savard, Christian | Alvarez, Fernando | Provost, Chantale | Chorfi, Younes | D'Allaire, Sylvie | Benoit-Biancamano, Maria-Odile | Gagnon, Carl A.
Vaccination is a useful option to control infection with porcine reproductive and respiratory syndrome virus (PRRSV), and several modified live-PRRSV vaccines have been developed. These vaccines have shown some efficacy in reducing the incidence and severity of clinical disease as well as the duration of viremia and virus shedding but have failed to provide sterilizing immunity. The efficacy of modified live-virus (MLV) vaccines is greater against a homologous strain compared with heterologous PRRSV strains. The objective of this study was to evaluate the efficacy of Fostera PRRS MLV vaccine in protecting against challenge with a heterologous field strain widely circulating in the swine herds of eastern Canada. Forty-six piglets were divided into 4 groups: nonvaccinated-nonchallenged; nonvaccinated-challenged; vaccinated-challenged; and vaccinated-nonchallenged. The animals were vaccinated at 23 d of age with Fostera PRRS and challenged 23 d later with a heterologous field strain of PRRSV (FMV12-1425619). Overall, the vaccine showed some beneficial effects in the challenged animals by reducing the severity of clinical signs and the viral load. A significant difference between nonvaccinated and vaccinated animals was detected for some parameters starting 11 to 13 d after challenge, which suggested that the cell-mediated immune response or other delayed responses could be more important than pre-existing PRRSV antibodies in vaccinated animals within the context of protection against heterologous strains.
显示更多 [+] 显示较少 [-]6. Administration of Centella Leaf Extract (Centella asiatica (L.) Urban) for Decreasing cAMP Responsive Element Modulator (CREM) Expression in Testicular Seminiferous Tubule of Male Rats (Rattus norvegicus) 全文
2016
Darmayanti, Susi | Wahyuni, Sri | Akmal, Muslim | Siregar, Tongku Nizwan | Sugito, Sugito
The objective of this study was to determine the effect of centella leaf extract administration on decreased of the molecule cAMP responsive element modulator (CREM) expression in the testicular seminiferous tubules of male rats (Rattus norvegicus). Eight rats, aged 3.5 months with 150-250 grams of body weight (BW) were used in this study. All rats were divided randomly into four groups as if K0 as a control group whereas K1, K2, and K3 were given the centella leaf extract with doses 125, 250, and 500 mg / kg body weight respectivelly that given once daily for 30 days. At the end of the treatment, rats were sacrificed and their testes were collected and subsequently fixed in buffered neutral formalin (BNF) 10% as fixative solution for histological preparation. The CREMs expressions were detected using immunohistochemical methods. The results showed that the number of CREM expression in the seminiferous tubules significantly differ (P 0.05) between K0 and the treatment group (K1, K2, and K3). Conclusion, the administration of centella leaf extract with of the dose 125, 250, and 500 mg/kg BW can decreased CREM expression spermatids of testicular seminiferous tubules in male rat.
显示更多 [+] 显示较少 [-]7. Productivity And Chemical Composition Of Several Mulberry Species (Morus spp) Agains Spacing Plant, and Cutting Age 全文
2016
Hutasoit, Rijanto | Ginting, Simon | Sirait, Juniar | Tarigan, Andi
The cultivation of mulberry as forages is scarce in Indonesian feeding system for ruminant production, although many studies have indicated its nutritional potential as animal feed especially ruminants. This study was aimed to investigate the effects spacing of plant and cutting age on productivity and chemical composition of some species mulberry plants. The experiment was conducted in a randomized block design with factorial treatments. The factors species were (M. indica cv kanva, M. nigra, M. cathyana, and M. Multicaulis), the spacing of plants (1 x 0.5 m, 1 x 1 m and 1 x 1.5 m) and cutting ages (210, 240, and 270 days after planting). The results showed that species, M. multicaulis and M. cathyana are the highest growth, using a spacing of 1 x 0.5 m with cutting age 270 days after planting. Dry matter production highest (P 0,05) in M. Cathyana at spacing of 1 x 0.5 with cutting age 270 days after planting. The ratio of leaves and stems of plants are affected by age, the highest proportions of leaf is obtained at the cutting age of 210 days. Chemical composition were highest in M.multicaulis at the age of 270 days. The highest content of organic matter (OM) were found in M.Kanva and not different with M. Nigra at the age of 270 day after planting. In treatment of cutting ages have no effect (P 0.05) on the Crude protein (CP), ADF, NDF, lignin and tannin content. The average content of CP obtained gained 20.69%, 32.38% ADF, NDF 33.99%, 12.45% lignin and tannin 0.3%. Concluded that mulberry plants with a plant spacing of plant 1 x 0.5 and 270 days after plant have more advantages for use as animal feed.
显示更多 [+] 显示较少 [-]5. Important Mycotic Diseases In Animal Livestock Caused By Some Agriculture Fungi In Indonesia 全文
2016
Ahmad, Riza Zainuddin | Gholib, Djaenudin
One of contribution for Indonesian state from Agriculture sector is livestock animals. This livestock animals in Indonesia is divided to large and small ruminant, poultry, and other commercial animals. All these animals can be infected by some agriculture fungi which causes mycosis. The disease cause economic loss by morbidity and mortality. In chicken (poultry), aspergillosis caused by Aspergillus sp can be very important among mycotic diseases. In ruminant ringworm (dermatofitosis) caused by dermatofit fungi which infected skin, and mastitis caused by fungi in Dairy cattle causes decrease milk production. Histoplasmosis caused by fungi such as Histoplasma farciminosum is called Selakarang, infect horse. This paper discribes these mycotic diseases and control and to give more information of fungal disease caused by some agriculture fungi.
显示更多 [+] 显示较少 [-]1. Clean, Green, Ethical (CGE) Management: What Research Do We Really Need? 全文
2016
Martin, Graeme B | Ferasyi, Teuku Reza
Industries based on small ruminants are major contributors to world food supply but, in many production systems, reproductive technology is not directly relevant. In addition, there is a general need to embrace the vision for products that are clean, green and ethical (CGE). In the concept of CGE management, the environment of the animal is used to control reproduction rather than technological tools. Nutrition is the primary factor but, rather than feeding ruminants with potential human food, we need to focus on forages with occasional smart supplements. This focus also opens up opportunities new forages can supply energy and protein whilst improving animal health and welfare, and reducing carbon emissions.Nutritional inputs must be accurately coordinated with reproductive events to ensure that the metabolic signals are appropriate to the stage of the reproductive process. To control the timing of reproduction, we begin with simply managing the presence of the male but then seek more precision through the greater use of ultrasound.Finally, genetic improvement should be part of every industry strategy and it is critical in the long-term development of CGE management. Most aspects of CGE management have a strong genetic component, as evidenced by variation among genotypes, and among individuals within genotypes. For example, a combination of nutritional management with genetic improvement in the rate of muscle accumulation can accelerate sexual maturity, potentially leading to simultaneous improvements in meat production, reproductive efficiency and environmental footprint.For each local situation, we need to introduce the various elements of the CGE package in stages, adapting the process to cover variations in genotype and in geographical and socio-economic environments. Some concepts might need further research and development for local conditions. Ultimately, CGE management is a simple and cost-effective way to improve productivity whilst safeguarding the future of the livestock industries.
显示更多 [+] 显示较少 [-]Awareness of operators on the requirements and procedures for animal quarantine and the distribution of temporary animal quarantine stations in Peninsular Malaysia 全文
2016
Ummi Noorhakimah Abdullah | Latiffah Hassan | Ong, Bee Lee
Temporary quarantine stations (TQS) are transitory premises that havebeen approved to facilitate the quarantine of imported live animals in Malaysia. These stations must abide to the standard operating procedures (SOP) for animal quarantine as outlined by the veterinaryauthority in Malaysia. However, the level of awareness for the quarantine procedures among the TQS operators and managers has not been assessed. This study was conducted to describe thedistribution of the TQS in 2012-2013 and the level of awareness among its operators on the quarantine procedures and the fundamental requirements for quarantine establishments. Eight TQS from 25 wereselected and operators or managers were interviewed using a questionnaire and the facility was visited. The study found thatmajority (82.5%) of the TQS operators were aware of the quarantine procedures but the auditors from the veterinary authorityrevealed vice versa.
显示更多 [+] 显示较少 [-]Gross and histomorphology of the ovary of Black Bengal goat (Capra hircus) 全文
2016
Haque A. | Haque Z. | Parvez M. N. H. | Quasem M. A.
Ovary plays a vitalrole in the reproductive biology andbiotechnology of female animals. In thisstudy, both the right and left ovaries ofthe Black Bengal goat were collected fromthe slaughter houses of different Thanasin the Mymensingh district. For each ofthe specimens, gross parameters such asweight, length and width were recorded.Then they were processed and stained withH&E for histomorphometry. This studyrevealed that the right ovary (0.53 ± 0.02g) was heavier than the left (0.52 ± 0.02 g).The length of the right ovary (1.26 ± 0.04cm) was lower than the left (1.28 ± 0.02cm) but the width of the right (0.94 ± 0.02cm) was greater than the left (0.90 ± 0.03cm). The diameter of ovarian follicles inthe cortex was measured as primordial 39.6± 6.61 µm, primary single layer 54.0 ± 4.06µm, primary multi-layer 147.6 ± 11.04 µm,secondary with C-shaped antrum 449.5 ±75.71 µm and graafian 1.3 ± 0.20 mm. Inthe graffian follicle, the thickness of thegranulosa cell layer was 79.2 ± 11.04 µm,theca interna 75.76 ± 6.82 µm, theca externa130.07 ± 12.53 µm and the oocyte diameterwas 109.8 ± 5.75 µm. These results will behelpful to manipulate ovarian functions insmall ruminants
显示更多 [+] 显示较少 [-]