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https://www.readbyqxmd.com/read/28092619/concentration-of-lactoferrin-and-immunoglobulin-g-in-cows-milk-in-relation-to-health-status-of-the-udder-lactation-and-season
#1
K Musayeva, A Sederevičius, R Želvytė, I Monkevičienė, D Beliavska-Aleksiejūnė, S Kerzienė
The aim of this study was to analyze an effect of udder health status, somatic cell count (SCC), stage and number of lactations, and different seasons on the concentration of lactoferrin (LF) and immunoglobulin G (IgG) in quarter milk samples (n=120) from crossbreed (Lithuanian Black-and-White & Holstein) dairy cows. Quarter health status was based on SCC and microbiological analysis. The highest mean value of LF and IgG were observed in quarters with subclinical mastitis 0.1 ± 0.02 mg/ml and 0.41 ± 0.06 mg/ml, respectively...
December 1, 2016: Polish Journal of Veterinary Sciences
https://www.readbyqxmd.com/read/28092611/prevalence-of-bovine-herpesvirus-type-4-in-aborting-dairy-cows
#2
Đ Cvetojević, B Savić, V Milićević, B Kureljušić, N Jezdimirović, D Jakić-Dimić, M Pavlović, Lj Spalević
Bovine herpesvirus type 4 (BHV-4) is related to many different conditions: infertility, postpartal metritis, vulvovaginitis, mastitis, encephalitis, calf pneumonia, keratoconjunctivitis, cutaneous lesions, digital dermatitis and abortion. In this study a retrospective PCR examination of 100 extracted DNA samples from aborting cows was performed in order to determine: prevalence of BHV-4 in abortive cattle, whether coinfections BHV-4 with other abortifacient pathogens are present in the same sample and to determine the month of gestation when BHV-4 associated abortions were detected...
December 1, 2016: Polish Journal of Veterinary Sciences
https://www.readbyqxmd.com/read/28089290/assessing-circumstances-and-causes-of-dairy-cow-death-in-italian-dairy-farms-through-a-veterinary-practice-survey-2013-2014
#3
Francesca Fusi, Alessandra Angelucci, Valentina Lorenzi, Luca Bolzoni, Luigi Bertocchi
A questionnaire survey about on farm dairy cow mortality was carried out among veterinary practitioners in Italy between January 2013 and May 2014. The study aimed at investigating the main circumstances of death in dairy cows (euthanasia, emergency slaughter or unassisted death), the primary causes and the risk factors of death. Out of 251 dead cows involved (across 137 farms), 54.6% died assisted and 45.4% were found dead. The main causes of death were metabolic/digestive disorders (22.3%) and mastitis/udder problems (17...
January 6, 2017: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/28087612/biofilm-formation-and-antimicrobial-resistance-genes-of-coagulase-negative-staphylococci-isolated-from-cows-with-mastitis-in-argentina
#4
Mariela E Srednik, Yannick D N Tremblay, Josée Labrie, Marie Archambault, Mario Jacques, Fernández Cirelli Alicia, Elida R Gentilini
Mastitis affects the health and welfare of dairy cows worldwide. Coagulase-negative staphylococci (CNS) are known to form biofilms and are increasingly recognized as a cause of persistent bovine intramammary infections. A total of 90 CNS isolated from cows with clinical and subclinical mastitis in Argentina from 2008-2014 were identified by PCR-RFLP using the gap gene. Standard microtiter plate assays were used to assess CNS biofilm formation and Staphylococcus haemolyticus species formed the strongest biofilms...
January 12, 2017: FEMS Microbiology Letters
https://www.readbyqxmd.com/read/28012631/estimating-us-dairy-clinical-disease-costs-with-a-stochastic-simulation-model
#5
D Liang, L M Arnold, C J Stowe, R J Harmon, J M Bewley
A farm-level stochastic model was used to estimate costs of 7 common clinical diseases in the United States: mastitis, lameness, metritis, retained placenta, left-displaced abomasum, ketosis, and hypocalcemia. The total disease costs were divided into 7 categories: veterinary and treatment, producer labor, milk loss, discarded milk, culling cost, extended days open, and on-farm death. A Monte Carlo simulation with 5,000 iterations was applied to the model to account for inherent system variation. Four types of market prices (milk, feed, slaughter, and replacement cow) and 3 herd-performance factors (rolling herd average, product of heat detection rate and conception rate, and age at first calving) were modeled stochastically...
December 21, 2016: Journal of Dairy Science
https://www.readbyqxmd.com/read/28007038/semi-quantitative-method-for-staphylococci-magnetic-detection-in-raw-milk
#6
Carla Margarida Duarte, Carla Carneiro, Susana Cardoso, Paulo Peixeiro Freitas, Ricardo Bexiga
Bovine mastitis is the most costly disease for dairy farmers, hence, control measures to prevent it are crucial for dairy farm sustainability. Staphylococcus aureus is considered a major mastitis pathogen because of its impact on milk quality and low cure rates. Prevention of S. aureus mastitis includes segregation of infected animals, whilst treatment of such animals should be performed for a longer time to improve cure rates. This makes identification of S. aureus infected quarters and animals of significant importance...
December 23, 2016: Journal of Dairy Research
https://www.readbyqxmd.com/read/27979776/safety-assessment-of-genetically-modified-milk-containing-human-beta-defensin-3-on-rats-by-a-90-day-feeding-study
#7
Xin Chen, Ming-Qing Gao, Dong Liang, Songna Yin, Kezhen Yao, Yong Zhang
In recent years, transgenic technology has been widely applied in many fields. There is concern about the safety of genetically modified (GM) products with the increased prevalence of GM products. In order to prevent mastitis in dairy cows, our group produced transgenic cattle expressing human beta-defensin-3 (HBD3) in their mammary glands, which confers resistance to the bacteria that cause mastitis. The milk derived from these transgenic cattle thus contained HBD3. The objective of the present study was to analyze the nutritional composition of HBD3 milk and conduct a 90-day feeding study on rats...
December 12, 2016: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/27965653/esbl-producing-escherichia-coli-from-cows-suffering-mastitis-in-china-contain-clinical-class-1-integrons-with-ctx-m-linked-to-iscr1
#8
Tariq Ali, Sadeeq Ur Rahman, Limei Zhang, Muhammad Shahid, Shiyao Zhang, Gang Liu, Jian Gao, Bo Han
The prevalence of pathogenic multi-drug resistant (MDR) extended-spectrum β-lactamase (ESBL)-producing Escherichia coli is rapidly increasing, becoming a global concern. In a veterinary context, ESBL-producing E. coli are mostly reported in poultry and pigs. Here, we report on the prevalence and characterize ESBL-producing E. coli isolated from diverse dairy farms in China. Overall, 36 (23.53%) out of 153 E. coli isolates from mastitic milk samples (n = 1252) were confirmed as ESBL-producers by double-disc synergy testing and PCR...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27956769/acute-phase-response-in-lame-crossbred-dairy-cattle
#9
A Bagga, Swaran Singh Randhawa, S Sharma, B K Bansal
AIM: The study was undertaken to study acute phase response based on acute phase proteins (APPs) such as C-reactive protein (CRP), haptoglobin (Hp), serum amyloid A (SAA), and fibrinogen in lame crossbred dairy cattle. MATERIALS AND METHODS: Lame animals (n=30) were selected within 3-7 days of being noticed as lame by the farm veterinarian, from a local dairy farm in southeast Ludhiana over a period of 6 months, stratified proportionately with respect to stage of lactation with non-lame healthy cows (n=10)...
November 2016: Veterinary World
https://www.readbyqxmd.com/read/27939551/antimicrobial-treatment-of-clinical-mastitis-in-the-eastern-united-states-the-influence-of-dairy-farmers-mastitis-management-and-treatment-behavior-and-attitudes
#10
J Kayitsinga, R L Schewe, G A Contreras, R J Erskine
To assess both the behaviors and social variables related to antimicrobial therapy for clinical mastitis, we sent a survey to 1,700 dairy farms in Michigan, Pennsylvania, and Florida in January and February 2013. The survey included questions related to 7 major areas: sociodemographic and farm characteristics, milking proficiency, milking systems, cow environment, infected cow monitoring and treatment, farm labor, and attitudes toward mastitis and related antimicrobial use. The overall response rate was 41% (21% in Florida, 39% in Michigan, and 45% in Pennsylvania)...
December 8, 2016: Journal of Dairy Science
https://www.readbyqxmd.com/read/27939148/detection-of-the-biofilm-component-polysaccharide-intercellular-adhesin-in-staphylococcus-aureus-infected-cow-udders
#11
Sarah Schönborn, Volker Krömker
Biofilms are communities of microorganisms embedded in a self-produced extracellular matrix made up of polymeric substances. They reduce the effects of antibiotics and allow the microorganisms to evade the innate immune system. This can lead to persistent or recurrent infections. In dairy cow herds, mastitis is a serious problem. The present study aimed to investigate the occurrence of biofilms in the udders of dairy cows infected with Staphylococcus (S.) aureus, because biofilms may affect the response to treatment of bovine mastitis...
November 30, 2016: Veterinary Microbiology
https://www.readbyqxmd.com/read/27915437/selective-reliable-blood-and-milk-bio-markers-for-diagnosing-clinical-and-subclinical-bovine-mastitis
#12
Kadry Sadek, Ebeed Saleh, Mousa Ayoub
Mastitis is positioned as the most vital ailment in dairy cows in light of conventional cost examinations. The aim of the present study was to evaluate the diagnostic value of different acute phase proteins (APPs), pro-inflammatory cytokines, and oxidative stress biomarkers in healthy cows and in those with clinical or subclinical mastitis and to localize APP gene expression in the milk of mastitic cows. Therefore, 20 subclinical mastitic cows with positive California Mastitis Test (CMT) results and no clinical signs of mastitis, 15 clinically mastitic cows, and 15 healthy cows with negative CMT results and somatic cell count (SCC) of <600,000 cells/mL were selected...
December 3, 2016: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/27912754/bovine-mastitis-prevalence-risk-factors-and-isolation-of-staphylococcus-aureus-in-dairy-herds-at-hawassa-milk-shed-south-ethiopia
#13
Rahmeto Abebe, Hagere Hatiya, Mesele Abera, Bekele Megersa, Kassahun Asmare
BACKGROUND: Mastitis is a disease of major economic importance in dairy industry worldwide. It is of particular concern in developing countries like Ethiopia, where milk and milk products are scarce. The objectives of the study were to estimate the prevalence of mastitis, identify the cow-and herd-level potential risk factors and isolate Staphylococcus aureus, one of etiological agents for contagious mastitis, from cows positive for mastitis. A total of 529 lactating cows selected randomly from 95 herds were screened by California mastitis test (CMT) for sub-clinical mastitis...
December 3, 2016: BMC Veterinary Research
https://www.readbyqxmd.com/read/27892648/milking-performance-evaluation-and-factors-affecting-milking-claw-vacuum-levels-with-flow-simulator
#14
Masafumi Enokidani, Kazuhiro Kawai, Yasunori Shinozuka, Aiko Watanabe
Milking performance of milking machines that matches the production capability of dairy cows is important in reducing the risk of mastitis, particularly in high-producing cows. This study used a simulated milking device to examine the milking performance of the milking system of 73 dairy farms and to analyze the factors affecting claw vacuum. Mean claw vacuum and range of fluctuation of claw vacuum (claw vacuum range) were measured at three different flow rates: 5.7, 7.6 and 8.7 kg/min. At the highest flow rate, only 16 farms (21...
November 28, 2016: Animal Science Journal, Nihon Chikusan Gakkaihō
https://www.readbyqxmd.com/read/27890338/a-longitudinal-study-on-transmission-of-staphylococcus-aureus-genotype-b-in-swiss-communal-dairy-herds
#15
Bart H P van den Borne, Hans U Graber, Verena Voelk, Carlotta Sartori, Adrian Steiner, M Christina Haerdi-Landerer, Michèle Bodmer
Staphylococcus aureus is a common mastitis causing pathogen of dairy cattle. Several S. aureus genotypes exist, of which genotype B (GTB) is highly prevalent in Swiss dairy herds. Dairy farming in mountainous regions of Switzerland is characterised by the movement of dairy cattle to communal pasture-based operations at higher altitudes. Cows from different herds of origin share pastures and milking equipment for a period of 2 to 3 months during summer. The aim of this longitudinal observational study was to quantify transmission of S...
January 1, 2017: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/27874095/longitudinal-metagenomic-profiling-of-bovine-milk-to-assess-the-impact-of-intramammary-treatment-using-a-third-generation-cephalosporin
#16
Erika K Ganda, Rafael S Bisinotto, Svetlana F Lima, Kristina Kronauer, Dean H Decter, Georgios Oikonomou, Ynte H Schukken, Rodrigo C Bicalho
Antimicrobial usage in food animals has a direct impact on human health, and approximately 80% of the antibiotics prescribed in the dairy industry are used to treat bovine mastitis. Here we provide a longitudinal description of the changes in the microbiome of milk that are associated with mastitis and antimicrobial therapy. Next-generation sequencing, 16 S rRNA gene quantitative real-time PCR, and aerobic culturing were applied to assess the effect of disease and antibiotic therapy on the milk microbiome...
November 22, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27871373/design-and-production-of-antibodies-for-the-detection-of-streptococcus-uberis
#17
K Mihklepp, K Kivirand, M Nikopensius, D Peedel, M Utt, T Rinken
Streptococcus uberis (S. uberis) is an important environmental pathogen causing mastitis in dairy cattle. Mastitis or mammary gland infection is the most common disease in milking cows and cause significant economic burden to farmers due to the reduction of the amount of milk and its quality. The development of rapid analytical methods for the determination of mastitis-causing pathogens in milk is of utmost importance for the early identification of the causes of mastitis and the beginning of timely treatment of cows...
January 2017: Enzyme and Microbial Technology
https://www.readbyqxmd.com/read/27865409/high-somatic-cell-counts-and-changes-in-milk-fat-and-protein-contents-around-insemination-are-negatively-associated-with-conception-in-dairy-cows
#18
Ahmad Albaaj, Gilles Foucras, Didier Raboisson
The fertility of dairy cows has decreased dramatically worldwide over the last few decades, and several causes of this trend have been reported. Several studies have associated compromised udder health with deteriorating reproduction performance. Subclinical ketosis (SCK) has also been reported to be a risk factor for decreased conception. The objective of the present study was to describe how SCK might interact with the reported association between udder health and conception in dairy cows. Data from the French Milk Control Program and data on 8,549,667 instances of artificial insemination (AI) and their corresponding preceding and subsequent test-days from 5,979,701 Holstein cows were examined over a 5-year period (2008-2012)...
January 15, 2017: Theriogenology
https://www.readbyqxmd.com/read/27863557/in-vitro-assessment-of-the-effects-of-temperature-on-phagocytosis-reactive-oxygen-species-production-and-apoptosis-in-bovine-polymorphonuclear-cells
#19
Cristina Lecchi, Nicola Rota, Andrea Vitali, Fabrizio Ceciliani, Nicola Lacetera
Heat stress exerts a direct negative effect on farm animal health, triggering physiological responses. Environmental high temperature induces immunosuppression in dairy cows, increasing the risk of mastitis and milk somatic cell counts. The influence of heat stress on leukocytes activities has not been fully elucidated. The present in vitro study was aimed at assessing whether the exposure to temperature simulating conditions of severe whole body hyperthermia affects defensive functions of bovine blood polymorphonuclear cells...
December 2016: Veterinary Immunology and Immunopathology
https://www.readbyqxmd.com/read/27853717/amiata-donkey-milk-chain-animal-health-evaluation-and-milk-quality
#20
Giuseppe Ragona, Franco Corrias, Martina Benedetti, Maria Paladini, Federica Salari, Lolanda Altomonte, Mina Martini
This study presents an investigation of Amiata donkey health and quality of milk for human consumption. Thirty-one lactating dairy jennies were examined. The following samples were collected: faecal samples from the rectum of animals for parasitological examination; cervical swabs for the detection of bacteria causing reproductive disorders; and blood samples for serological diagnosis of main zoonotic (Brucella spp., Leptospira spp.) and donkey abortion agents (Brucella spp., Leptospira spp., Salmonella abortus equi, Equine viral arterithis virus, Equine herpesvirus type 1)...
June 3, 2016: Italian Journal of Food Safety
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