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https://www.readbyqxmd.com/read/28823069/current-status-of-cattle-production-system-in-nyagatare-district-rwanda
#1
Eugene Mazimpaka, Francis Mbuza, Tukei Michael, Eugene N Gatari, E M Bukenya, Okwee-Acai James
A study was conducted to characterize the cattle production systems in Nyagatare District, Eastern Province of Rwanda using pre-tested questionnaires, interviews with key informants as well as focus group discussions in a period of 2 months. The respondents were selected by multi-stage sampling at sector and cell levels. Based on the procedure of Krejcie and Morgan (Educational and Psychological Measurement 30:607-610, 1970) to determine the overall sample size, the result indicated that the majority (98.3%) of farms were privately owned by large families of five to seven members, and most farmers (53...
August 19, 2017: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/28822937/role-of-earthworms-mucus-in-vermicomposting-system-biodegradation-tests-based-on-humification-and-microbial-activity
#2
Kui Huang, Hui Xia
During vermicomposting, the organic wastes can be recycled into high-value products as mediated by earthworms through gut digestion, burrowing, casting and mucus excretion. However, to date, few studies have been done on the role of mucus in vermicomposting system compared to the effects of the other activities. Hence, this study investigated the potential role of earthworms' mucus in the decomposition and humification of organic wastes. For this, the mucus of Eisenia fetida was extracted and inoculated into three vermicomposting substrates using cow dung (CD), fruit and vegetable wastes (FVW), and sewage sludge (SS)...
August 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28822902/pregnancy-outcome-is-influenced-by-luteal-area-during-diestrus-before-successful-insemination-but-not-by-milk-production-level
#3
H Berger, M Lietzau, A Tichy, K Herzog
The objective was to compare luteal area (LA), luteal blood flow (LBF), and progesterone (P4) concentration before and after artificial insemination (AI) in pregnant and open cows in the diestrus preceding insemination and during the first 21 d after insemination. A number of 119 multiparous German Holstein cows were examined using B-mode and color Doppler sonography in diestrus (15-5 d before AI) and on days 7, 14, and 21 post insemination (pi). Blood samples for determination of P4 concentration were collected at each examination...
April 14, 2017: Theriogenology
https://www.readbyqxmd.com/read/28822553/vitamin-d-status-in-growing-dairy-goats-and-sheep-influence-of-ultraviolet-b-radiation-on-bone-metabolism-and-calcium-homeostasis
#4
M V Nemeth, M R Wilkens, A Liesegang
The aim of this study was to investigate how controlled UVB irradiation in combination with reduced nutritional vitamin D (vitD) supply affects vitD status and Ca metabolism of growing goats and sheep. The hypothesis was that, like dairy cows, goats and sheep are able to compensate for the missing nutritional supply of vitD through endogenous production in the skin, with the consequence of a high vitD status and a balanced Ca homeostasis. Sixteen lambs and 14 goat kids aged 3 and a half months were housed in an UVB free environment and fed hay and a vitD-free concentrate over a period of 13 wk...
August 16, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28822552/consequences-of-dietary-energy-source-and-energy-level-on-energy-balance-lactogenic-hormones-and-lactation-curve-characteristics-of-cows-after-a-short-or-omitted-dry-period
#5
R J van Hoeij, J Dijkstra, R M Bruckmaier, J J Gross, T J G M Lam, G J Remmelink, B Kemp, A T M van Knegsel
Omitting the dry period (DP) generally reduces milk production in the subsequent lactation. The aim of this study was to evaluate the effect of dietary energy source-glucogenic (G) or lipogenic (L)-and energy level-standard (std) or low-on milk production; energy balance (EB); lactogenic hormones insulin, insulin-like growth factor 1 (IGF-1), and growth hormone (GH); and lactation curve characteristics between wk 1 and 44 postpartum in cows after a 0-d or 30-d DP. Cows (n = 110) were assigned randomly to 3 transition treatments: a 30-d DP with a standard energy level required for expected milk yield [30-d DP(std)], a 0-d DP with the same energy level as cows with a 30-d DP [0-d DP(std)], and a 0-d DP with a low energy level [0-d DP(low)]...
August 16, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28822550/technical-note-reduced-pulsation-chamber-vacuum-at-normal-pulsation-rate-and-ratio-provides-adequate-prestimulation-to-induce-oxytocin-release-and-milk-ejection-while-simultaneous-milk-flow-is-prevented
#6
Anna-Lena Neuheuser, Claire Belo, Rupert M Bruckmaier
In the present study we investigated the milking characteristics and the oxytocin release in dairy cows milked after either manual prestimulation or a premilking period with pulsating liners at normal pulsation rate (60) and ratio (60:40) while the pulsation chamber vacuum (PCV) was reduced to 20 kPa to prevent the opening of the liners. During the milking trial with 8 cows the PCV reduction was started either before attachment (PCV-1) or immediately after attachment (PCV-2) of the teat cups. Milk yields, total milking times, average milk flows, peak flow rates, the duration of milk flow plateaus, and the duration of milk flow declines did not differ among the 3 treatments...
August 16, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28822549/effect-of-substituting-soybean-meal-and-canola-cake-with-grain-based-dried-distillers-grains-with-solubles-as-a-protein-source-on-feed-intake-milk-production-and-milk-quality-in-dairy-cows
#7
C Gaillard, M T Sørensen, M Vestergaard, M R Weisbjerg, A Basar, M K Larsen, H Martinussen, U Kidmose, J Sehested
The growth of the bioethanol industry is leading to an increase in the production of coproducts such as dried distillers grains with solubles (DDGS). Both corn-based DDGS and grain-based DDGS (gDDGS; defined as originating from grain sources such as barley, wheat, triticale, or a mix, excluding corn) appear to be relevant sources of feed and protein for dairy cows. To date, most of the studies investigating DDGS have been performed with corn-based DDGS. The objectives of this study were to determine the effects of the proportion of gDDGS in the diet on feed intake, milk production, and milk quality...
August 16, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28822546/genetic-evaluation-of-claw-health-traits-accounting-for-potential-preselection-of-cows-to-be-trimmed
#8
Iola Croué, Freddy Fikse, Kjell Johansson, Emma Carlén, Gilles Thomas, Hélène Leclerc, Vincent Ducrocq
Claw lesions are one of the most important health issues in dairy cattle. Although the frequency of claw lesions depends greatly on herd management, the frequency can be lowered through genetic selection. A genetic evaluation could be developed based on trimming records collected by claw trimmers; however, not all cows present in a herd are usually selected by the breeder to be trimmed. The objectives of this study were to investigate the importance of the preselection of cows for trimming, to account for this preselection, and to estimate genetic parameters of claw health traits...
August 16, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28822545/effects-of-the-dose-and-viability-of-saccharomyces-cerevisiae-2-ruminal-fermentation-performance-of-lactating-dairy-cows-and-correlations-between-ruminal-bacteria-abundance-and-performance-measures
#9
Y Jiang, I M Ogunade, K G Arriola, M Qi, D Vyas, C R Staples, A T Adesogan
This study examined effects of the dose and viability of supplemented Saccharomyces cerevisiae yeast strain YE1496 on ruminal fermentation and performance of lactating dairy cows. A second objective was to examine correlations between ruminal bacteria abundance and performance measures. Four ruminally cannulated lactating cows (284 ± 18 days in milk) were assigned randomly to 1 of 4 treatment sequences in a 4 × 4 Latin square experimental design using four 21-d experimental periods. Cows were fed a nonacidotic total mixed ration comprising 22...
August 16, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28822543/dairy-calf-management-a-comparison-of-practices-and-producer-attitudes-among-conventional-and-organic-herds
#10
J A Pempek, G M Schuenemann, E Holder, G G Habing
Dairy calves are at high risk for morbidity and mortality early in life. Understanding producer attitudes is important for implementation of best management practices to improve calf health. The objectives of this study were to evaluate usage frequency and producer attitudes on key calf management practices between conventional and organic dairy operations. A cross-sectional survey was mailed to conventional and organic dairy producers in Ohio and Michigan that included questions on cow-calf separation, colostrum management, and vaccination use...
August 16, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28822242/mucosal-immunity-of-the-postpartum-bovine-genital-tract
#11
REVIEW
Dinesh Dadarwal, Colin Palmer, Philip Griebel
In this review, mucosal immune defense mechanisms used to control infections in the bovine genital tract (vestibule, vagina, cervix, uterus and oviduct) during the postpartum period are reviewed. Knowledge gaps are highlighted to emphasize the need for further investigations. Physical barriers to the entry of microbes include vulvar sealing, vestibule-vaginal constriction, a narrow cervical opening and the mucosal epithelium along with the overlying mucus layer. Genital tract mucosal epithelial cells recognize damage-associated molecular patterns and pathogen-associated molecular patterns and respond by secreting antimicrobial peptides and cytokines to recruit and activate immune cells...
August 10, 2017: Theriogenology
https://www.readbyqxmd.com/read/28822157/-the-analysis-of-multivariate-image-and-chemometrics-in-tlc-fingerprinting-of-artificial-cow-bezoar
#12
Ling-Wen Yao, Yan Shi, Dong-Mei Sun, Xian-Long Cheng, Feng Wei, Shuang-Cheng Ma
A method of thin-layer fingerprinting chromatogram of artificial cow-bezoar was established with the developing solvent consisting of cyclohexane, ethyl acetate, acetic acid and methanol (2∶7∶1∶2), and 10% sulfuric acid ethanol solution sprayed as colour-developing agent. After heated at 105 ℃, TLC was recorded as an image in ultraviolet light at 366 nm which was converted into grayscale. By the gray value extracted from the grayscale, the multivariate data obtained from TLC of samples could be analyzed by chemometric method...
June 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/28821223/maternal-nutrient-restriction-in-mid-to-late-gestation-influences-fetal-mrna-expression-in-muscle-tissues-in-beef-cattle
#13
Francois Paradis, Katie M Wood, Kendall C Swanson, Stephen P Miller, Brian W McBride, Carolyn Fitzsimmons
BACKGROUND: Manipulating maternal nutrition during specific periods of gestation can result in re-programming of fetal and post-natal development. In this experiment we investigated how a feed restriction of 85% compared with 140% of total metabolizable energy requirements, fed to cows during mid-to-late gestation, influences phenotypic development of fetuses and mRNA expression of growth (Insulin-Like Growth Factor family and Insulin Receptor (INSR)), myogenic (Myogenic Differentiation 1 (MYOD1), Myogenin (MYOG), Myocyte Enhancer Factor 2A (MEF2A), Serum Response Factor (SRF)) and adipogenic (Peroxisome Proliferator Activated Receptor Gamma (PPARG)) genes in fetal longissimus dorsi (LD) and semitendinosus (ST) muscle...
August 18, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28819221/functional-validation-of-gpihbp1-and-identification-of-a-functional-mutation-in-gpihbp1-for-milk-fat-traits-in-dairy-cattle
#14
Jie Yang, Xuan Liu, Dan Wang, Chao Ning, Haifei Wang, Qin Zhang, Li Jiang
In a previous genome-wide association study (GWAS) on milk production traits in a Chinese Holstein population, we revealed that GPIHBP1 is a novel promising candidate gene for milk fat content traits. In this study, we performed over-expression and RNAi experiments on GPIHBP1 in bovine primary mammary epithelial cells. The results showed that the expression of several important milk fat-related genes (LPL, CD36, VLDLR, ACACA and FASN) increased or decreased when the expression of GPIHBP1 was up- or down-regulated...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28818893/complete-genome-sequence-of-a-hobi-like-virus-isolated-from-a-nelore-cow-with-gastroenteric-disease-in-the-state-of-s%C3%A3-o-paulo-brazil
#15
Adriana Cortez, João Pessoa Araújo, Eduardo Furtado Flores, Márcio Garcia Ribeiro, Jane Megid, Antonio Carlos Paes, José Paes de Oliveira Filho, Leila Sabrina Ullmann, Camila Dantas Malossi, Marcos Bryan Heinemann
The Hobi-like virus presents antigenic and molecular differences in relation to bovine virus diarrhea virus 1 and 2. The description of the complete genome of the Hobi-like virus SV757/15, isolated from a Nelore cow with gastroenteric disease in Brazil, will help in understanding the evolution and diversity of pestiviruses.
August 17, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28818752/risk-factors-for-on-farm-mortality-in-beef-suckler-cows-under-extensive-keeping-management
#16
Kerli Mõtus, Ulf Emanuelson
The on-farm mortality of cows in cow-calf herds has a significant influence on the economic efficiency of the farm. It is also an indicator of suboptimal animal health and welfare. The present study analysed the registry data of beef cows in Estonia from the years 2013 to 2015. The datasets incorporated 8084 parturitions of primiparous cows and 21,283 parturitions of 9234 multiparous cows. A Weibull proportional hazard random effect model was used for risk factor analysis, in which the on-farm mortality, including death and euthanasia, was the event of interest...
August 10, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/28817629/maldi-tof-ms-identification-of-anopheles-gambiae-giles-blood-meal-crushed-on-whatman-filter-papers
#17
Sirama Niare, Lionel Almeras, Fatalmoudou Tandina, Amina Yssouf, Affane Bacar, Ali Toilibou, Ogobara Doumbo, Didier Raoult, Philippe Parola
BACKGROUND: Identification of the source of mosquito blood meals is an important component for disease control and surveillance. Recently, matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) profiling has emerged as an effective tool for mosquito blood meal identification, using the abdomens of freshly engorged mosquitoes. In the field, mosquito abdomens are crushed on Whatman filter papers to determine the host feeding patterns by identifying the origin of their blood meals...
2017: PloS One
https://www.readbyqxmd.com/read/28815847/mastitis-treatment-reduction-in-antibiotic-usage-in-dairy-cows
#18
REVIEW
V Krömker, S Leimbach
Animal-friendly, economical, resource-saving milk production provides the basis for sustained consumer acceptance. Bovine mastitis plays a decisive role in the dairy industry-disturbing animal health and welfare and causing considerable economic losses on the other hand. Currently, antimicrobial treatment is indispensable to keep bovine udder health, animal welfare and economic aspects in balance. On the contrary, emergence and spread of antimicrobial resistance (AMR) is an urgent matter of particular public interest, and as a consequence, antimicrobial usage (AMU) in production livestock is a critically discussed subject...
August 2017: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/28815782/influence-of-conjugated-linoleic-acids-and-vitamin-e-on-milk-fatty-acid-composition-and-concentrations-of-vitamin-a-and-%C3%AE-tocopherol-in-blood-and-milk-of-dairy-cows
#19
S Schäfers, U Meyer, D von Soosten, L Hüther, C Drong, K Eder, E Most, A Tröscher, W Pelletier, A Zeyner, S Dänicke
The objective of this trial was to investigate the influences of conjugated linoleic acid (CLA) and vitamin E (Vit. E) and their interactions on fatty acid composition and vitamins in milk (α-tocopherol, retinol and β-carotene) as well as on α-tocopherol in blood of pluriparous cows from week 6 ante partum until week 10 post-partum (p.p.). We assigned 59 pluriparous German Holstein cows to four treatment groups with the treatment factors CLA and Vit. E at two levels in a 2 × 2 factorial design. Milk fatty acid composition and milk vitamins were analysed on lactation days 7 and 28...
August 16, 2017: Journal of Animal Physiology and Animal Nutrition
https://www.readbyqxmd.com/read/28815747/what-is-your-diagnosis-erythrocyte-morphology-in-a-cow
#20
Déborah Culang, Carolyn Gara-Boivin
No abstract text is available yet for this article.
August 16, 2017: Veterinary Clinical Pathology
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