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https://www.readbyqxmd.com/read/27892648/milking-performance-evaluation-and-factors-affecting-milking-claw-vacuum-levels-with-flow-simulator
#1
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
#2
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...
November 18, 2016: 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
#3
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
#4
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
#5
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
#6
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
#7
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
https://www.readbyqxmd.com/read/27847416/infrared-thermography-a-potential-noninvasive-tool-to-monitor-udder-health-status-in-dairy-cows
#8
REVIEW
M Sathiyabarathi, S Jeyakumar, A Manimaran, G Jayaprakash, Heartwin A Pushpadass, M Sivaram, K P Ramesha, D N Das, Mukund A Kataktalware, M Arul Prakash, R Dhinesh Kumar
The animal husbandry and livestock sectors play a major role in the rural economy, especially for the small and marginal farmers. India has the largest livestock population in the world and ranks first in the milk production. Mastitis is the most common and expensive infectious disease in dairy cattle. The global economic losses per year due to mastitis amounts to USD 35 billion and for Indian dairy industry ₹6000 crores per year. Early detection of mastitis is very important to reduce the economic loss to the dairy farmers and dairy industry...
October 2016: Veterinary World
https://www.readbyqxmd.com/read/27845022/selection-of-cows-for-treatment-at-dry-off-on-organic-dairy-farms
#9
Klemens Kiesner, Nicole Wente, Otto Volling, Volker Krömker
Restrictions regarding the use of antibiotics make selective antibiotic dry cow therapy (DCT) mandatory on organic farms in Germany. This requires methods for identifying cows with an intramammary infection (IMI) at dry-off. The aim of this field study was to create a decision scheme for the use of DCT based on cow level factors associated with IMI at dry-off and the probability of both cure and new infection (NI) during the dry period. Data from 250 cows from five organic farms were collected including somatic cell counts (SCC) from Dairy Herd Improvement (DHI) records, California mastitis test (CMT) results at dry-off, clinical mastitis (CM) history, parity and dry-off treatment...
November 2016: Journal of Dairy Research
https://www.readbyqxmd.com/read/27845018/is-lack-of-antibiotic-usage-affecting-udder-health-status-of-organic-dairy-cattle
#10
Inmaculada Orjales, Marta López-Alonso, Ruth Rodríguez-Bermúdez, Francisco Rey-Crespo, Ana Villar, Marta Miranda
This research communication aimed to compare somatic cell count (SCC), the main marker of udder health status, in organic farms not using antibiotics (O, n = 6), organic farms using antibiotics (OA, n = 7) and conventional farms (CA, n = 5) using antibiotic treatments, all of them at pasture. SCC was statistically significantly higher in O (173780) compared to CA (93325) and OA (107152). Milk yield had a significant diluting effect on SCC and differences between groups increased with parities. Stratified analysis of SCC depending on lactation number and % of monthly SCC test with different linear scores (LS) indicated that there is no difference in udder health in the primiparous heifers from the three groups of farms, but it deteriorates in older cows because of chronic infections in O (possibly due to lack of antibiotic use)...
November 2016: Journal of Dairy Research
https://www.readbyqxmd.com/read/27818092/the-matrix-assisted-laser-desorption-ionization-time-of-flight-mass-spectrometry-maldi-tof-ms-identification-versus-biochemical-tests-a-study-with-enterobacteria-from-a-dairy-cattle-environment
#11
Naiara Miranda Bento Rodrigues, Greiciane França Bronzato, Gabrielli Stefaninni Santiago, Larissa Alvarenga Batista Botelho, Beatriz Meurer Moreira, Irene da Silva Coelho, Miliane Moreira Soares de Souza, Shana de Mattos de Oliveira Coelho
Mastitis adversely affects milk production and in general cows do not regain their full production levels post recovery, leading to considerable economic losses. Moreover the percentage decrease in milk production depends on the specific pathogen that caused the infection and enterobacteria are responsible for this greater reduction. Phenotypic tests are among the currently available methods used worldwide to identify enterobacteria; however they tend to misdiagnose the species despite the multiple tests carried out...
September 21, 2016: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/27816244/association-of-anatomical-characteristics-of-teats-with-quarter-level-somatic-cell-count
#12
J F Guarín, M G Paixão, P L Ruegg
Mastitis occurs after bacteria successfully traverse the teat orifice and cause an intramammary infection. Anatomical characteristics of the teat are potential risk factors for infection. The objective of this study was to identify potential associations between anatomical characteristics of teats and quarter-level somatic cell count (QSCC) from cows on larger dairy farms in Wisconsin. Teat dimensions (length and diameter at the teat barrel and apex) were measured, and hyperkeratosis scores were assessed for 3,713 quarters of 959 cows on 9 dairy farms...
November 2, 2016: Journal of Dairy Science
https://www.readbyqxmd.com/read/27810218/occurrence-genotyping-shiga-toxin-genes-and-associated-risk-factors-of-e-coli-isolated-from-dairy-farms-handlers-and-milk-consumers
#13
M A Awadallah, H A Ahmed, A M Merwad, M A Selim
The objectives of the current study were to determine the occurrence and genotypes of E. coli in dairy farms, workers and milk consumers and to evaluate risk factors associated with contamination of milk in dairy farms. Molecular characterization of shiga toxin associated genes and enterobacterial repetitive intergenic consensus-PCR (ERIC-PCR) finger printing of E. coli from different sources were also studied. Paired milk samples and rectal swabs from 125 dairy cows, rectal swabs from 82 calves and hand swabs from 45 dairy workers from five dairy farms were collected...
November 2016: Veterinary Journal
https://www.readbyqxmd.com/read/27790200/staphylococcus-aureus-entrance-into-the-dairy-chain-tracking-s-aureus-from-dairy-cow-to-cheese
#14
Judith Kümmel, Beatrix Stessl, Monika Gonano, Georg Walcher, Othmar Bereuter, Martina Fricker, Tom Grunert, Martin Wagner, Monika Ehling-Schulz
Staphylococcus aureus is one of the most important contagious mastitis pathogens in dairy cattle. Due to its zoonotic potential, control of S. aureus is not only of great economic importance in the dairy industry but also a significant public health concern. The aim of this study was to decipher the potential of bovine udder associated S. aureus as reservoir for S. aureus contamination in dairy production and processing. From 18 farms, delivering their milk to an alpine dairy plant for the production of smeared semi-hard and hard cheese...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27760518/fine-mapping-of-a-qtl-on-bovine-chromosome-6-using-imputed-full-sequence-data-suggests-a-key-role-for-the-group-specific-component-gc-gene-in-clinical-mastitis-and-milk-production
#15
Hanne Gro Olsen, Tim Martin Knutsen, Anna M Lewandowska-Sabat, Harald Grove, Torfinn Nome, Morten Svendsen, Mariann Arnyasi, Marte Sodeland, Kristil K Sundsaasen, Sandra Rinne Dahl, Bjørg Heringstad, Hanne H Hansen, Ingrid Olsaker, Matthew Peter Kent, Sigbjørn Lien
BACKGROUND: Clinical mastitis is an inflammation of the mammary gland and causes significant costs to dairy production. It is unfavourably genetically correlated to milk production, and, thus, knowledge of the mechanisms that underlie these traits would be valuable to improve both of them simultaneously through breeding. A quantitative trait locus (QTL) that affects both clinical mastitis and milk production has recently been fine-mapped to around 89 Mb on bovine chromosome 6 (BTA6), but identification of the gene that underlies this QTL was not possible due to the strong linkage disequilibrium between single nucleotide polymorphisms (SNPs) within this region...
October 19, 2016: Genetics, Selection, Evolution: GSE
https://www.readbyqxmd.com/read/27760017/phenotypical-and-genotypical-antimicrobial-resistance-of-coagulase-negative-staphylococci-isolated-from-cow-mastitis
#16
I Klimiene, M Virgailis, A Pavilonis, R Siugzdiniene, R Mockeliunas, M Ruzauskas
The objectives of this study were to determine the prevalence and antimicrobial resistance of coagulase-negative staphylococci (CNS) isolated from dairy cows with subclinical mastitis. Antimicrobial resistance in staphylococci were evaluated by breakpoint values specific to the species (EU-CAST). The presence of resistance-encoding genes was detected by multiplex PCR. A total of 191 CNS isolates were obtained. The CNS isolates were typically resistant to penicillin (67.4%), tetracyc-line (18.9%), and erythromycin (13...
September 1, 2016: Polish Journal of Veterinary Sciences
https://www.readbyqxmd.com/read/27743665/the-lactococcus-genus-as-a-potential-emerging-mastitis-pathogen-group-a-report-on-an-outbreak-investigation
#17
M X Rodrigues, S F Lima, C H Higgins, S G Canniatti-Brazaca, R C Bicalho
The bacterium Lactococcus lactis is widely used in food production and in medical applications, and is considered safe for human and animal use. However, studies have also linked Lactococcus bacteria to infection. For example, certain variants of Lactococcus species have been associated with bovine mastitis (e.g., Lactococcus lactis and Lactococcus garvieae). In this study, we investigated an outbreak of bovine mastitis thought to be associated with Lactococcus bacteria by using microbiological and molecular techniques...
October 13, 2016: Journal of Dairy Science
https://www.readbyqxmd.com/read/27733790/impacts-of-self-and-cross-sucking-on-cattle-health-and-performance
#18
Motamed Elsayed Mahmoud, Fatma Ali Mahmoud, Adel Elsayed Ahmed
BACKGROUND: Improvement of dairy farms economics requires intensification, automatic milking, and artificial rearing methods. The ability to express normal behavior is one of the five freedoms to achieve animal welfare, whereas the display of abnormal behaviors is considered as an indicator of poor welfare. Cross-sucking is defined as sucking any body parts of pen-mate calves, whereas inter-sucking in cows is defined as sucking the udder or udder area. Previous studies showed that self- and cross-sucking during the calf-hood period could be a causal factor of milk sucking in adulthood...
September 2016: Veterinary World
https://www.readbyqxmd.com/read/27720028/a-bayesian-micro-simulation-to-evaluate-the-cost-effectiveness-of-interventions-for-mastitis-control-during-the-dry-period-in-uk-dairy-herds
#19
P M Down, A J Bradley, J E Breen, W J Browne, T Kypraios, M J Green
Importance of the dry period with respect to mastitis control is now well established although the precise interventions that reduce the risk of acquiring intramammary infections during this time are not clearly understood. There are very few intervention studies that have measured the clinical efficacy of specific mastitis interventions within a cost-effectiveness framework so there remains a large degree of uncertainty about the impact of a specific intervention and its costeffectiveness. The aim of this study was to use a Bayesian framework to investigate the cost-effectiveness of mastitis controls during the dry period...
October 1, 2016: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/27706731/association-of-cd4-snps-with-fat-percentage-of-holstein-cattle
#20
T Usman, Y Yu, L Zhai, C Liu, X Wang, Y Wang
Cluster of differentiation 4 gene (CD4) is well known for its role in immunity, but its effects on production traits remain to be elucidated. The present study was designed to explore single nucleotide polymorphisms (SNPs) in the exons, flanking introns, and promoter of CD4, as well as to analyze their effects on milk production traits (percentage of protein, fat, and lactose; mastitis indicator traits somatic cell count; and somatic cell score). A total of 10 SNPs, including eight in the exon and two in the intron regions, were identified using pooled DNA sequencing...
September 16, 2016: Genetics and Molecular Research: GMR
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