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https://www.readbyqxmd.com/read/28299517/characterization-and-complete-genome-sequence-analysis-of-a-novel-virulent-siphoviridae-phage-against-staphylococcus-aureus-isolated-from-bovine-mastitis-in-xinjiang-china
#1
Qian Zhang, Shaozhen Xing, Qiang Sun, Guangqian Pei, Shi Cheng, Yannan Liu, Xiaoping An, Xianglilan Zhang, Yonggang Qu, Yigang Tong
Bovine mastitis is one of the most costly diseases in dairy cows worldwide. It can be caused by over 150 different microorganisms, where Staphylococcus aureus is the most frequently isolated and a major pathogen responsible for heavy economic losses in dairy industry. Although antibiotic therapy is most widely used, alternative treatments are necessary due to the increasing antibiotic resistance. Using phage for pathogen control is a promising tool in the fight against antibiotic resistance. Mainly using high-throughput sequencing, bioinformatics and our proposed phage termini identification method, we have isolated and characterized a novel virulent phage, designated as vB_SauS_IMEP5, from manure collected from dairy farms in Shihezi, Xinjiang, China, for use as a biocontrol agent against Staphylococcus aureus infections...
March 15, 2017: Virus Genes
https://www.readbyqxmd.com/read/28288845/sodium-houttuyfonate-inhibits-lps-induced-inflammatory-response-via-suppressing-tlr4-nf-%C3%A4-b-signaling-pathway-in-bovine-mammary-epithelial-cells
#2
Wenqing Wang, Xiaoyu Hu, Peng Shen, Naisheng Zhang, Yunhe Fu
Mastitis is an inflammatory reaction caused by microorganisms in the mammary gland which usually leads to the decrease of the dairy production. It vastly makes bad effect on the cattle industry all over the world. Nowadays, an increasing number of scientists keep a watchful eye on natural compounds to prevent mastitis. Sodium houttuyfonate (SH) has been reported to have antibacterial and anti-inflammatory effects. This experiment aimed to investigate the anti-inflammatory properties of SH on LPS-stimulated primary bovine mammary epithelial cells (bMEC)...
March 10, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28277182/pharmacokinetic-analysis-of-thymol-carvacrol-and-diallyl-disulfide-after-intramammary-and-topical-applications-in-healthy-organic-dairy-cattle
#3
Sharon E Mason, Keena A E Mullen, Kevin L Anderson, Steven P Washburn, James L Yeatts, Ronald E Baynes
Mastitis is among the most costly concerns for dairy producers whether cattle are managed conventionally or organically. Unfortunately, there are no USFDA-approved mastitis treatments that allow dairy cows in the United States to maintain organic dairy status. We investigated the plasma pharmacokinetics of three organic mastitis products currently used by organic producers and organic dairy veterinarians. Those products include intramammary, topical and intravaginal preparations, each dosed at two levels. Additionally, tissue data were collected for kidney, liver and fat in order to estimate a withholding time for each of the products...
February 14, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/28272303/effects-of-silver-nanoparticles-on-multiple-drug-resistant-strains-of-staphylococcus-aureus-and-pseudomonas-aeruginosa-from-mastitis-infected-goats-an-alternative-approach-for-antimicrobial-therapy
#4
Yu-Guo Yuan, Qiu-Ling Peng, Sangiliyandi Gurunathan
Recently, silver nanoparticles (AgNPs) have been widely used in various applications as antimicrobial agents, anticancer, diagnostics, biomarkers, cell labels, and drug delivery systems for the treatment of various diseases. Microorganisms generally acquire resistance to antibiotics through the course of antibacterial therapy. Multi-drug resistance (MDR) has become a growing problem in the treatment of infectious diseases, and the widespread use of broad-spectrum antibiotics has resulted in the development of antibiotic resistance by numerous human and animal bacterial pathogens...
March 6, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28256391/molecular-epidemiology-of-streptococcus-agalactiae-isolated-from-mastitis-in-brazilian-dairy-herds
#5
Glei A Carvalho-Castro, Juliana R Silva, Luciano V Paiva, Dircéia A C Custódio, Rafael O Moreira, Glaucia F Mian, Ingrid A Prado, Antônio Chalfun-Junior, Geraldo M Costa
Streptococcus agalactiae is one of the most common pathogens leading to mastitis in dairy herds worldwide; consequently, the pathogen causes major economic losses for affected farmers. In this study, multilocus sequence typing (MLST), genotypic capsular typing by multiplex polymerase chain reaction (PCR), and virulence gene detection were performed to address the molecular epidemiology of 59 bovine (mastitis) S. agalactiae isolates from 36 dairy farms located in the largest milk-producing mesoregions in Brazil (Minas Gerais, São Paulo, Paraná, and Pernambuco)...
February 16, 2017: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/28255203/indirubin-treatment-of-lipopolysaccharide-induced-mastitis-in-a-mouse-model-and-activity-in-mouse-mammary-epithelial-cells
#6
Jin-Lun Lai, Yu-Hui Liu, Yong-Chong Peng, Pan Ge, Chen-Fei He, Chang Liu, Ying-Yu Chen, Ai-Zhen Guo, Chang-Min Hu
Indirubin is a Chinese medicine extracted from indigo and known to be effective for treating chronic myelogenous leukemia, neoplasia, and inflammatory disease. This study evaluated the in vivo anti-inflammatory activity of indirubin in a lipopolysaccharide- (LPS-) induced mouse mastitis model. The indirubin mechanism and targets were evaluated in vitro in mouse mammary epithelial cells. In the mouse model, indirubin significantly attenuated the severity of inflammatory lesions, edema, inflammatory hyperemia, milk stasis and local tissue necrosis, and neutrophil infiltration...
2017: Mediators of Inflammation
https://www.readbyqxmd.com/read/28240296/exogenous-melatonin-reduces-somatic-cell-count-of-milk-in-holstein-cows
#7
Minghui Yang, Jianmin Shi, Jianhua Tian, Jingli Tao, Menglong Chai, Jing Wang, Zhiyuan Xu, Yukun Song, Kuanfeng Zhu, Pengyun Ji, Guoshi Liu
High somatic cell counts in milk caused by mastitis significantly influence the quality of milk and result in substantial annual economic loss. This study evaluated the beneficial effects of melatonin (MT) on milk somatic cell count (SCC) in cows. To examine the effects of melatonin on SCC, one hundred twenty cows were divided into four groups based on milk SCC. In each group, half of the cows were treated with melatonin (S.C.). Melatonin treatment significantly reduced milk SCC. To explore the potential mechanism, 20 cows with relatively high SCC were selected to evaluate the biochemical and immunological profiles of their blood after melatonin treatment...
February 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28237594/efficacy-of-a-high-free-iodine-barrier-teat-disinfectant-for-the-prevention-of-naturally-occurring-new-intramammary-infections-and-clinical-mastitis-in-dairy-cows
#8
C M M R Martins, E S C Pinheiro, M Gentilini, M Lopez Benavides, M V Santos
Using a natural exposure trial design, the goal of our study was to evaluate the clinical efficacy of an iodine teat disinfectant with barrier properties and a high level of free iodine relative to a conventional iodine teat disinfectant with no barrier properties and low levels of free iodine. During the 18 wk of the trial, quarter milk samples were collected every 2 wk from 385 dairy cows from 2 herds. Cows on both farms were assigned in a balanced way according to milk yield, number of lactation, days in milk, somatic cell count (SCC) and microbiology culture pretrial into one of following groups: nonbarrier post milking teat disinfectant (NBAR; n = 195 cows; 747 quarters) or barrier postmilking teat disinfectant (BAR; n = 190 cows; 728 quarters)...
February 22, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28237241/stochastic-bio-economic-modeling-of-mastitis-in-ethiopian-dairy-farms
#9
Abraham Mekibeb Getaneh, Sefinew Alemu Mekonnen, Henk Hogeveen
Mastitis is an inflammation of the mammary gland that is considered to be one of the most frequent and costly diseases in the dairy industry. Also in Ethiopia, bovine mastitis is one of the most frequently encountered diseases of dairy cows. However, there was no study, so far, regarding the costs of clinical mastitis and only two studies were reported on costs of subclinical mastitis. Presenting an appropriate and complete study of the costs of mastitis will help farmers in making management decisions for mastitis control...
March 1, 2017: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/28235706/the-lytic-activity-of-recombinant-phage-lysin-lysk%C3%AE-amidase-against-staphylococcal-strains-associated-with-bovine-and-human-infections-in-the-jiangsu-province-of-china
#10
Yan Zhou, Hui Zhang, Hongduo Bao, Xiaomeng Wang, Ran Wang
We investigated the lytic activity of the bacteriophage endolysin (lysin) LysKΔamidase against live methicillin-resistant and-susceptible staphylococcal strains clinically isolated from bovine milk and humans from different origins of China. Antibiotic resistance patterns, multilocus sequence typing and SCCmec type of 137 staphylococcal strains isolated from bovine milk associated with bovine mastitis and human diseases were studied. A lytic enzyme, LysKΔamidase, was constructed by fusing the N-terminal 220 amino acids with the C-terminal 105 amino acids of staphylococcal phage lysin LysK...
February 16, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/28229929/intramammary-1-25-dihydroxyvitamin-d3-treatment-increases-expression-of-host-defense-genes-in-mammary-immune-cells-of-lactating-dairy-cattle
#11
Kathryn E Merriman, Michael B Poindexter, Mercedes F Kweh, Jose E P Santos, Corwin D Nelson
Bacterial infection of the mammary gland activates an intracrine vitamin D pathway in macrophages of dairy cows. The active hormone of the vitamin D pathway, 1,25-dihydroxyvitamin D3 (1,25D), stimulates nitric oxide and β-defensin responses in bovine monocyte cultures, but the effect of 1,25D on innate immune genes in the mammary gland remained unknown. Therefore, the objective of this study was to determine the effects intramammary 1,25D treatment on expression of vitamin D associated host-defenses of the bovine mammary gland...
February 13, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28217653/corticosteroid-and-azithromycin-in-idiopathic-granulomatous-mastitis
#12
Marzieh Salehi, Maryam Salehi, Nader Kalbasi, Atousa Hakamifard, Hassan Salehi, Mohammad Mahdi Salehi, Jalil Sharifian
BACKGROUND: Mastitis is an inflammatory disorder in breast tissues due to bacterial factors, mycobacterial infections or autoimmune diseases. Idiopathic granulomatous mastitis (IGM) is a form of mastitis which may be affected by systematic diseases such as sarcoidosis, and infectious causes such as mycobacterium and fungus. This study evaluates the efficacy of medical therapy with a combination of corticosteroid and Azithromycin in patients with IGM. MATERIALS AND METHODS: This study is a clinical trial research carried out in Alzahra Hospital (Isfahan, Iran) in 2013 on granulomatous mastitis patients...
2017: Advanced Biomedical Research
https://www.readbyqxmd.com/read/28205255/effect-of-postnatal-hiv-treatment-on-clinical-mastitis-and-breast-inflammation-in-hiv-infected-breast-feeding-women
#13
Sabrina Zadrozny, Daniel Westreich, Michael G Hudgens, Charles Chasela, Denise J Jamieson, Francis Martinson, Chifundo Zimba, Gerald Tegha, Irving Hoffman, William C Miller, Brian W Pence, Caroline C King, Athena P Kourtis, Wezi Msungama, Charles van der Horst
BACKGROUND: The relationship between mastitis and antiretroviral therapy among HIV-positive, breast-feeding women is unclear. METHODS: In the Breastfeeding, Antiretrovirals, and Nutrition (BAN) study, conducted in Lilongwe, Malawi, 2369 mother-infant pairs were randomized to a nutritional supplement group and to one of three treatment groups: maternal antiretroviral therapy (ART), infant nevirapine (NVP) or standard of care for 24 weeks of exclusive breast-feeding and 4 weeks of weaning...
March 2017: Paediatric and Perinatal Epidemiology
https://www.readbyqxmd.com/read/28184027/baicalin-promotes-the-bacteriostatic-activity-of-lysozyme-on-s-aureus-in-mammary-glands-and-neutrophilic-granulocytes-in-mice
#14
Xuejiao Gao, Mengyao Guo, Zecai Zhang, Peng Shen, Zhengtao Yang, Naisheng Zhang
Staphylococcus aureus causes mastitis as a result of community-acquired or nosocomial infections. Lysozyme (LYSO) is an enzyme that is upregulated in many organisms during the innate immune response against infection by bacterial pathogens. Baicalin is a bioactive flavonoid that can bind to enzymes, often to potentiate their effect. Here we tested the effects of baicalin on the activity of LYSO using the S. aureus mastitis mouse model and neutrophilic granulocyte model of S. aureus infection. In our experiments, S...
February 8, 2017: Oncotarget
https://www.readbyqxmd.com/read/28174145/-effect-of-herd-health-management-on-the-prevalence-of-postpartum-dysgalaktie-syndrome-ppds-and-the-treatment-incidence
#15
W Pendl, B Jenny, P R Torgerson, P Spring, D Kümmerlen, X Sidler
The Postpartum Dysgalaktie Syndrome (PPDS) also known as metritis agalactia mastitis (MMA), is considered the most common disease of the sow after farrowing. The reasons for PPDS are multifactorial and are to be found in the areas of management and hygiene, feeding, water supply and animal specific factors such as body condition and age of the sows. In this study a veterinary herd health management was carried out in 28 pig farms with PPDS, with the aim to reduce the PPDS prevalence and animal treatment incidence (TI)...
February 2017: Schweizer Archiv Für Tierheilkunde
https://www.readbyqxmd.com/read/28169551/advances-in-lactoferrin-research-concerning-bovine-mastitis
#16
Kei-Ichi Shimazaki, Kazuhiro Kawai
Lactoferrin is a multifunctional, iron-binding glycoprotein found in milk and other exocrine secretions. Lactoferrin in milk plays vital roles in the healthy development of newborn mammals, and is also an innate resistance factor involved in the prevention of mammary gland infection by microorganisms. Inflammation of the udder because of bacterial infection is referred to as mastitis. There have been many investigations into the relationships between lactoferrin and mastitis, which fall into several categories...
February 2017: Biochemistry and Cell Biology, Biochimie et Biologie Cellulaire
https://www.readbyqxmd.com/read/28161183/investigation-of-the-effect-of-pegbovigrastim-on-some-periparturient-immune-disorders-and-performance-in-mexican-dairy-herds
#17
R Ruiz, L O Tedeschi, A Sepúlveda
This study analyzed the efficacy of pegbovigrastim (Imrestor, Elanco Animal Health, Greenfield, IN) on some health and production parameters in lactating dairy cows. Primiparous and multiparous Holsteins from 17 Mexican dairy herds (n = 10,238) were included in this study, which was conducted in 2015. Treated cows (n = 5,025) received Imrestor approximately 7 d before expected calving and again within 24 h after calving; control cows (n = 5,213) did not receive a placebo. Clinical mastitis (MAS; 0 to 30 DIM), retained placenta (RP), and clinical metritis (MET; 0 to 21 DIM) occurrences were recorded, as well as the number of medication days, medical treatments needed, and the number of days that milk was discarded due to medication administered for disease...
February 1, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28161180/clinical-outcome-comparison-of-immediate-blanket-treatment-versus-a-delayed-pathogen-based-treatment-protocol-for-clinical-mastitis-in-a-new-york-dairy-herd
#18
A K Vasquez, D V Nydam, M B Capel, S Eicker, P D Virkler
The purpose was to compare immediate intramammary antimicrobial treatment of all cases of clinical mastitis with a selective treatment protocol based on 24-h culture results. The study was conducted at a 3,500-cow commercial farm in New York. Using a randomized design, mild to moderate clinical mastitis cases were assigned to either the blanket therapy or pathogen-based therapy group. Cows in the blanket therapy group received immediate on-label intramammary treatment with ceftiofur hydrochloride for 5 d. Upon receipt of 24 h culture results, cows in the pathogen-based group followed a protocol automatically assigned via Dairy Comp 305 (Valley Agricultural Software, Tulare, CA): Staphylococcus spp...
February 1, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28159785/identification-of-peptidoglycan-hydrolase-constructs-with-synergistic-staphylolytic-activity-in-cow-milk
#19
Carolin T Verbree, Steven M Dätwyler, Susanne Meile, Fritz Eichenseher, David M Donovan, Martin J Loessner, Mathias Schmelcher
Peptidoglycan hydrolases (PGH) have been suggested as novel therapeutics for the treatment of bovine mastitis. However, activity in the presence of cow milk is an important requirement for drugs administered into the bovine udder. We have screened a library of >170 recombinant PGHs, including engineered bacteriophage endolysins, for enzymes with activity against Staphylococcus aureus in milk, using a microtiter plate-based protocol. Nine suitable PGH constructs were identified by this approach and further compared in time-kill assays for their efficacy against S...
February 3, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28155803/non-antibiotic-approaches-at-drying-off-for-treating-and-preventing-intramammary-infections-a-protocol-for-a-systematic-review-and-meta-analysis
#20
David Francoz, Vincent Wellemans, Jean-Philippe Roy, Pierre Lacasse, Alfredo Ordonez-Iturriaga, François Labelle, Simon Dufour
Intramammary infection (IMI) treatment and prevention at drying-off is one of the leading causes for using antimicrobials on dairy farms. The objective of the current paper is to describe the protocol used for conducting a systematic review of the literature on non-antibiotic strategies that can be used on dairy cows at dry off to treat and prevent IMI. Relevant literature will be identified using a combination of database search strategies and iterative screening of references. To be included in the review, articles will have to: (1) be published after 1969; (2) be written in English, French, or Spanish; (3) use a study design such as a controlled trial, an observational study, or an experimental study conducted in vivo; (4) be conducted on commercial dairy cows; (5) investigate a non-antibiotic intervention used at dry off; and finally, (6) report on a relevant mastitis outcome...
December 2016: Animal Health Research Reviews
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