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Research ArticleOpen accessPhrase in the titlePrevalence and Distribution of Mastitis Pathogens and their Resistance against Antimicrobial Agents in Dairy Cows in JordanAzmi D. Hawari, Fawzi Al-DabbasThe primary objective of this study was to determine the aetiology of bovine mastitis in ten herds of Holstein Friesian cow in Jordan, the prevalence of mastitis pathogens in dairy cows and their resistance to selected antimicrobial agents. Milk samples were collected from 220 lactating cows to determine the clinical and subclinical mastitis by white side test and confirmed by … …American Journal of Animal and Veterinary Sciences, Vol. 3, Issue 1 · 31 Mar 2008 · 7,675 accessesView PDFCite
Research ArticleOpen accessPhrase in the titleThe Association between Total Mixed Ration Particle Size and Fecal Scores in Holstein Lactating Dairy Cows from Florida, USAPedro Melendez, Elizabeth RoyThe objective of this study was to determine the association between the proportion of particles greater than 19 mm in a total mixed ration fed to dairy cattle and their fecal score. Over a 22 day period, random feed samples were collected twice a day from a one-side barn and assessed for particle size using the Pennsylvania State Particle Separator. … …American Journal of Animal and Veterinary Sciences, Vol. 11, Issue 1 · 6 Jan 2016 · 8,084 accessesView PDFCite
Research ArticleOpen accessPhrase in the titleChanges in the Rumen Papillae During the Periparturient Transition in Holstein Dairy Cows are Accompanied by Changes in Abundance of Proteins Involved in Intracellular pH Regulation, But not SCFA TransportAnne Hermen Laarman, Adam Kleinberg, Michael Alexander Steele et al.The objective of this study was to examine changes in SCFA transport capacity in the rumen epithelium during the parturition transition period. Twelve pregnant, cannulated primiparous and multiparous cows were fed a standard Total Mixed Ration (TMR) for the duration of the dry period; after calving, all cows were switched to an early lactation TMR. Rumen pH, fluid and biopsies … …American Journal of Animal and Veterinary Sciences, Vol. 10, Issue 1 · 31 Mar 2015 · 7,546 accessesView PDFCite
Research ArticleOpen accessPhrase in the titleButyrate Supplementation Affects Mrna Abundance of Genes Involved in Glycolysis, Oxidative Phosphorylation and Lipogenesis in the Rumen Epithelium of Holstein Dairy CowsAnne Hermen Laarman, Louis Dionissopoulos, Ousama AlZahal et al.Energy availability in epithelial cells is a crucial link for maintaining epithelial barrier integrity; energy depletion is linked to impaired barrier function in several epithelia. This study aimed to elucidate the effects of exogenous butyrate on mRNA abundance of genes indirectly involved in rumen epithelial barrier integrity. Sixteen mid-lactation Holstein cows fed a total mixed ration received a concentrate mix … …American Journal of Animal and Veterinary Sciences, Vol. 8, Issue 4 · 27 Nov 2013 · 7,519 accessesView PDFCite
Research ArticleOpen accessPhrase in the titleButyrate and Subacute Ruminal Acidosis Affect Abundance of Membrane Proteins Involved with Proton and Short Chain Fatty Acid Transport in the Rumen Epithelium of Dairy CowsAnne Hermen Laarman, Louis Dionissopoulos, Ousama AlZahal et al.The objective of this study was to elucidate the effects of butyrate on the Short Chain Fatty Acids (SCFA) membrane transport proteins and proton membrane transport proteins in the rumen epithelium. Sixteen mid-lactation cows were fed a 44% Non-Fibre Carbohydrate (NFC) diet and divided into a control treatment and a butyrate treatment. For 7 days, the cows on the control … …American Journal of Animal and Veterinary Sciences, Vol. 8, Issue 4 · 27 Nov 2013 · 7,475 accessesView PDFCite
Research ArticleOpen accessPhrase in the titleAdaptation to High Grain Diets Proceeds Through Minimal Immune System Stimulation and Differences in Extracellular Matrix Protein Expression in A Model of Subacute Ruminal Acidosis in Non-lactating Dairy CowsB. W. McBride, O. AlZahal, M. A. Steele, L. DionissopoulosProblem statement: Subacute Ruminal Acidosis (SARA) is a metabolic disorder affecting approximately 20% of all dairy cattle in North America. Although the presence of SARA has been described for some time, the etiology of the disorder remains uncertain. For example, many animals diagnosed with SARA seem to remodel and adapt their epithelium to accommodate the stresses imposed by SARA, but … …American Journal of Animal and Veterinary Sciences, Vol. 7, Issue 2 · 25 Jul 2012 · 8,118 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleExterior and Body Types of Cows with Different Levels of Dairy ProductivityDastanbek Asylbekovich Baimukanov, Anuarbek Temirbekovich Bissembayev, Stepan Dmitrievich Batanov et al.The research aimed to study the dynamics of changes in the selection and genetic parameters of the body, to determine the relationship between the productive qualities and the exterior of cows in the population of Holsteinized black-and-white and Kholmogory cattle of the Udmurt Republic. Cows with a productivity level of more than 8000 kg of milk for 305 days of … …American Journal of Animal and Veterinary Sciences, Vol. 17, Issue 2 · 8 Jun 2022 · 6,013 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleStudy of Mastitis Incidence in Cows of Dairy Farms in East Kazakhstan: Impacts of Nutrition, Endometritis and Mycotoxin ContaminationNurzhamal Mukhamadieva, Dinara Zainettinova, Mardan Julanov et al.This research aimed to investigate the prevalence, etiological factors, and diagnosis of mastitis in dairy farms located in East Kazakhstan. The study was conducted on two dairy farms, “Balke” and “Madi-R,” and examined a total of 490 cows. The findings indicate that the incidence of clinical and subclinical mastitis varied among the years studied. In 2016, the average incidence was … …American Journal of Animal and Veterinary Sciences, Vol. 18, Issue 4 · 7 Nov 2023 · 5,427 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleEffects of Rumen-Protected Methionine on Dairy Performance and Amino Acid Metabolism in Lactating CowsW.R. Yang, H. Sun, Q.Y. Wang et al.Problem statement: Free Met as one of the most limiting AA in dairy cows would be mostly degraded in the rumen. This study was to determine the effect of different levels of Rumen-Protected Met (RPMet) on dairy performance and serum amino acid metabolism. Approach: Thirty-six Holstein cows in similar condition were randomly assigned to six experimental treatments with six replicates … …American Journal of Animal and Veterinary Sciences, Vol. 5, Issue 1 · 31 Jan 2010 · 8,262 accessesView PDFCite
Research ArticleOpen accessIn the keywordsEffects of Age and Season on in vivo Embryo Production of Friesian Holstein CowsNurul Isnaini, Syafira Aldina Febrianty, Faizal Andri et al.Embryo transfer is one of the leading technologies that is now being applied in an effort to increase the population and productivity of dairy cattle in Indonesia. Several factors may affect embryo production including age and season. In this study, the effects of age and season on in vivo embryo production were evaluated on Friesian Holstein (FH) cows. A total … …American Journal of Animal and Veterinary Sciences, Vol. 19, Issue 1 · 2 Mar 2024 · 5,457 accessesView PDFCite