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Dairy microbiology

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https://www.readbyqxmd.com/read/29778482/randomized-noninferiority-field-trial-evaluating-cephapirin-sodium-for-treatment-of-nonsevere-clinical-mastitis
#1
T Tomazi, T A F Lopes, V Masson, J M Swinkels, M V Santos
The general objective of this study was to evaluate whether cephapirin sodium is noninferior compared with a positive control broad-spectrum product formulated with a combination of antimicrobials for intramammary treatment of nonsevere clinical mastitis. In addition, we compared the efficacy of treatments on the cure risks of pathogen groups (gram-positive, gram-negative, and cultures with no growth) based on culture results. A total of 346 cows distributed in 31 commercial dairy herds were selected to participate in the study, although only 236 met the criteria for evaluation of microbiological cure...
May 16, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29778477/the-effects-of-microfluidization-on-the-physical-microbial-chemical-and-coagulation-properties-of-milk
#2
A J Bucci, D L Van Hekken, M H Tunick, J A Renye, P M Tomasula
This work examines the use of mild heat treatments in conjunction with 2-pass microfluidization to generate cheese milk for potential use in soft cheeses, such as Queso Fresco. Raw, thermized, and high temperature, short time pasteurized milk samples, standardized to the 3% (wt/wt) fat content used in cheesemaking, were processed at 4 inlet temperature and pressure conditions: 42°C/75 MPa, 42°C/125 MPa, 54°C/125 MPa, and 54°C/170 MPa. Processing-induced changes in the physical, chemical, and microbial properties resulting from the intense pressure, shear, and cavitation that milk experiences as it is microfluidized were compared with nonmicrofluidized controls...
May 16, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29778470/genetic-diversity-of-thermoduric-spoilage-microorganisms-of-milk-from-brazilian-dairy-farms
#3
J C Ribeiro Júnior, R Tamanini, A L M de Oliveira, A A Alfieri, V Beloti
When correctly pasteurized, packaged, and stored, milk with low total bacterial counts (TBC) has a longer shelf life. Therefore, microorganisms that resist heat treatments are especially important in the deterioration of pasteurized milk and in its shelf life. The aim of this work was to quantify the thermoduric microorganisms after the pasteurization of refrigerated raw milk samples with low TBC and to identify the diversity of these isolates with proteolytic or lipolytic potential by RFLP analysis. Twenty samples of raw milk were collected in bulk milk tanks shortly after milking in different Brazilian dairy farms and pasteurized...
May 16, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29753489/short-communication-drying-off-practices-and-use-of-dry-cow-therapy-in-finnish-dairy-herds
#4
M J Vilar, M Hovinen, H Simojoki, P J Rajala-Schultz
The objective of this study was to survey drying-off practices and use of dry cow therapy (DCT) in Finland through an online questionnaire. The questionnaire was accessible to all dairy farmers of the Finnish dairy herd recording system in 2016 (approximately 5,400 farms). In total, 715 dairy producers across the country, representative of the Finnish dairy industry, participated in the survey. Cows were dried off gradually in most of the farms. Most farms (78%) reported using selective DCT, whereas 9% of farms did not use any DCT, and 13% of farms applied blanket DCT...
May 9, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29732324/retrospective-study-on-the-hygienic-quality-of-fresh-ricotta-cheeses-produced-in-sicily-italy
#5
Maria Luisa Scatassa, Isabella Mancuso, Sonia Sciortino, Giusi Macaluso, Marisa Palmeri, Luigi Arcuri, Massimo Todaro, Cinzia Cardamone
The present work was carried out to investigate the microbiological profile of Sicilian ewes' ricotta cheeses during fifteen years of investigations (2002-2016). The samples were collected between those conferred to the Istituto Zooprofilattico Sperimentale della Sicilia (IZSSi) Adelmo Mirri , Palermo (Italy), by the competent authority during official control, by food business operator in HACCP systems and in research projects. Enterobacteriaceae, Escherichia coli and coagulase - positive staphylococci (CPS) were found only in some samples...
March 31, 2018: Italian Journal of Food Safety
https://www.readbyqxmd.com/read/29721257/assessment-of-raw-cow-milk-quality-in-smallholder-dairy-farms-in-pemba-island-zanzibar-tanzania
#6
S H Gwandu, H E Nonga, R H Mdegela, A S Katakweba, T S Suleiman, R Ryoba
Milk quality depends on the physicochemical characteristics, hygienic standards, and nutritional quality; however, animal husbandry practices, unhygienic harvesting and processing, may affect its quality. A cross-sectional study was conducted between August 2010 and July 2011 to assess the hygiene of cow milk production environment, raw cow milk physicochemical characteristics, and microbial quality and estimate the prevalence of antimicrobial residues using standard methods in Pemba Island. A total of 98 raw cow milk samples from selected smallholder dairy farms were analyzed, and the judgement on the quality used the East African Standards...
2018: Veterinary Medicine International
https://www.readbyqxmd.com/read/29689333/microbiological-quality-assessment-of-milk-at-different-stages-of-the-dairy-value-chain-in-a-developing-country-setting
#7
Mohammad Aminul Islam, Subarna Roy, Ashikun Nabi, Sultana Solaiman, Mahdia Rahman, Mohsina Huq, Nurul Amin Siddiquee, Niyaz Ahmed
The main objective of the study was to assess the microbiological quality of milk at different stages of the dairy value chain from farm to the factory in Bangladesh. A total of 438 raw milk samples (387 from primary producers, 32 from collectors, 15 from chilling plants, 4 from local restaurants) and 95 commercially processed milk samples were collected from northern part of Bangladesh. Almost 72% (n = 280) of samples at producer level and 100% from both collectors (n = 32) and chilling plants (n = 15) were contaminated with coliforms while 57% (n = 220) of samples from producers, 91% (n = 29) of samples from collectors and 100% (n = 15) from chilling plants were contaminated with fecal coliforms...
April 17, 2018: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/29686652/application-of-bacteriocins-and-protective-cultures-in-dairy-food-preservation
#8
REVIEW
Célia C G Silva, Sofia P M Silva, Susana C Ribeiro
In the last years, consumers are becoming increasingly aware of the human health risk posed by the use of chemical preservatives in foods. In contrast, the increasing demand by the dairy industry to extend shelf-life and prevent spoilage of dairy products has appeal for new preservatives and new methods of conservation. Bacteriocins are antimicrobial peptides, which can be considered as safe since they can be easily degraded by proteolytic enzymes of the mammalian gastrointestinal tract. Also, most bacteriocin producers belong to lactic acid bacteria (LAB), a group that occurs naturally in foods and have a long history of safe use in dairy industry...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29680695/microbiological-quality-and-antimicrobial-resistance-characterization-of-salmonella-spp-in-fresh-milk-value-chains-in-ghana
#9
Angela Parry-Hanson Kunadu, Mark Holmes, Eric L Miller, Andrew J Grant
Consumer perception of poor hygiene of fresh milk products is a major barrier to promotion of milk consumption as an intervention to alleviate the burden of malnutrition in Ghana. Fresh milk is retailed raw, boiled, or processed into unfermented cheese and spontaneously fermented products in unlicensed outlets. In this study, we have determined microbiological quality of informally retailed fresh milk products and characterized the genomic diversity and antimicrobial resistance (AMR) patterns of non-typhoidal Salmonella (NTS) in implicated products...
April 14, 2018: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/29672479/protracted-outbreak-of-salmonella-newport-infections-linked-to-ground-beef-possible-role-of-dairy-cows-21-states-2016-2017
#10
Katherine E Heiman Marshall, Mackenzie Tewell, Selam Tecle, Molly Leeper, Jennifer Sinatra, Bonnie Kissler, Adrienne Fung, Kerri Brown, Darlene Wagner, Eija Trees, Kelley B Hise, Vishnu Chaturvedi, Linda K Schlater, Brenda R Morningstar-Shaw, Laura Whitlock, Kristin Holt, Karen Becker, Megin Nichols, Ian T Williams, Michael Jhung, Matthew E Wise, Laura Gieraltowski
In January 2017, CDC identified a cluster of Salmonella enterica serotype Newport infections with isolates sharing an indistinguishable pulsed-field gel electrophoresis (PFGE) pattern, JJPX01.0010 (pattern 10), through PulseNet, the national molecular subtyping network for foodborne disease surveillance. This report summarizes the investigation by CDC, state and local health and agriculture departments, and the U.S. Department of Agriculture's Food Safety and Inspection Service (USDA-FSIS) and discusses the possible role of dairy cows as a reservoir for strains of Salmonella that persistently cause human illness...
April 20, 2018: MMWR. Morbidity and Mortality Weekly Report
https://www.readbyqxmd.com/read/29671238/dairy-calf-rearing-unit-and-infectious-diseases-diarrhea-outbreak-by-bovine-coronavirus-as-a-model-for-the-dispersion-of-pathogenic-microorganisms
#11
Amauri Alcindo Alfieri, Juliane Ribeiro, Luciana de Carvalho Balbo, Elis Lorenzetti, Alice Fernandes Alfieri
Dairy calf rearing unit is a management system that is only recently being implemented by some milk producer's cooperatives in southern Brazil. However, aspects related to the health profile of the heifer calves that arrive in the rearing unit as well as about biosecurity practices and microbiological challenges have not yet been evaluated in this rearing system in a tropical country. Diarrhea is the main and most frequent consequence of enteric infections in newborn calves. This study, through some etiological and epidemiological characteristics of an outbreak of neonatal diarrhea, has the aim to alert to the possibility of pathogenic microorganism spread in a dairy heifer calf rearing unit...
April 18, 2018: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/29655563/laboratory-evaluation-of-a-novel-rapid-tube-test-system-for-differentiation-of-mastitis-causing-pathogen-groups
#12
S Leimbach, V Krömker
Because clinical mastitis, one of the most common diseases in dairy cows, is routinely treated with antimicrobial substances, it offers a high potential for future reduction of antimicrobial usage. In fact, intramammary antibiotic administration is not advisable in cases of clinical mastitis caused by coliform bacteria, yeasts, or protothecae or in cases with no detectable mastitis pathogen. To avoid unnecessary treatments with antimicrobials for the benefit of animal health and public welfare, the rapid identification of the mastitis-causing pathogens becomes necessary...
April 11, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29643295/prevalence-and-etiology-of-mastitis-in-dairy-cattle-in-el-oro-province-ecuador
#13
Said Amer, Fernando Lenin Aguilar Gálvez, Yasuhiro Fukuda, Chika Tada, Ivan Ludeña Jimenez, Wunster Favian Maza Valle, Yutaka Nakai
This study described the occurrence of clinical and subclinical forms of mastitis in 250 cattle from 5 dairy farms around the cities of Santa Rosa and Machala, El Oro Province, Ecuador. Clinical mastitis (CM) was determined based on obvious changes in milk (mild), signs of inflammation in the udder (moderate), and/or generalized clinical symptoms (severe). Subclinical mastitis (SCM) was assessed using the California mastitis test. CM and SCM were detected in 30 (12.0%) and 150 (60%) of the 250 tested cattle, respectively...
April 10, 2018: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/29605332/use-of-a-culture-independent-on-farm-algorithm-to-guide-the-use-of-selective-dry-cow-antibiotic-therapy
#14
A K Vasquez, D V Nydam, C Foditsch, M Wieland, R Lynch, S Eicker, P D Virkler
An algorithm using only computer-based records to guide selective dry-cow therapy was evaluated at a New York State dairy farm via a randomized field trial. DairyComp 305 (Valley Ag Software, Tulare, CA) and Dairy Herd Improvement Association test-day data were used to identify cows as low risk (cows that might not benefit from dry-cow antibiotics) or high risk (cows that will likely benefit). Low-risk cows were those that had all of the following: somatic cell count (SCC) ≤200,000 cells/mL at last test, an average SCC ≤200,000 cells/mL over the last 3 tests, no signs of clinical mastitis at dry-off, and no more than 1 clinical mastitis event in the current lactation...
March 28, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29566608/coxiella-burnetii-in-infertile-dairy-cattle-with-chronic-endometritis
#15
Davide De Biase, Alessandro Costagliola, Fabio Del Piero, Rossella Di Palo, Domenico Coronati, Giorgio Galiero, Barbara Degli Uberti, Maria Gabriella Lucibelli, Annalisa Fabbiano, Bernard Davoust, Didier Raoult, Orlando Paciello
Coxiella burnetii is an obligate intracellular pathogen and the cause of Q fever in many animal species and humans. Several studies have reported the association between C. burnetii and abortion, premature delivery, stillbirth, and weak offspring. However, no solid evidence indicates that C. burnetii causes endometritis, subfertility, and retained fetal membranes. For this study, histopathological and PCR evaluation were performed on 40 uterine biopsies from dairy cattle with poor fertility. Uterine swabs were concurrently tested with microbiology assays...
January 1, 2018: Veterinary Pathology
https://www.readbyqxmd.com/read/29550113/symposium-review-microbial-endocrinology-why-the-integration-of-microbes-epithelial-cells-and-neurochemical-signals-in-the-digestive-tract-matters-to-ruminant-health
#16
Mark Lyte, Daniel N Villageliú, Brian A Crooker, David R Brown
The union of microbiology and neurobiology, which has been termed microbial endocrinology, is defined as the study of the ability of microorganisms to produce and respond to neurochemicals that originate either within the microorganisms themselves or within the host they inhabit. It serves as the basis for an evolutionarily derived method of communication between a host and its microbiota. Mechanisms elucidated by microbial endocrinology give new insight into the ways the microbiota can affect host stress, metabolic efficiency, resistance to disease, and other factors that may prove relevant to the dairy industry...
March 14, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29543852/comparative-analysis-of-four-commercial-on-farm-culture-methods-to-identify-bacteria-associated-with-clinical-mastitis-in-dairy-cattle
#17
Jair C Ferreira, Marilia S Gomes, Erika C R Bonsaglia, Igor F Canisso, Edgar F Garrett, Jamie L Stewart, Ziyao Zhou, Fabio S Lima
Several multiple-media culture systems have become commercially available for on-farm identification of mastitis-associated pathogens. However, the accuracy of these systems has not been thoroughly and independently validated against microbiological evaluations performed by referral laboratories. Therefore, the purpose of the present study was to evaluate the performance of commercially available culture plates (Accumast, Minnesota Easy System, SSGN and SSGNC Quad plates) to identify pathogens associated with clinical mastitis in dairy cows...
2018: PloS One
https://www.readbyqxmd.com/read/29526214/selection-of-indigenous-lactic-acid-bacteria-presenting-anti-listerial-activity-and-their-role-in-reducing-the-maturation-period-and-assuring-the-safety-of-traditional-brazilian-cheeses
#18
Fernanda B Campagnollo, Larissa P Margalho, Bruna A Kamimura, Marcelo D Feliciano, Luisa Freire, Letícia S Lopes, Verônica O Alvarenga, Vasco A P Cadavez, Ursula Gonzales-Barron, Donald W Schaffner, Anderson S Sant'Ana
Artisanal raw milk cheeses are highly appreciated dairy products in Brazil and ensuring their microbiological safety has been a great need. This study reports the isolation and characterization of lactic acid bacteria (LAB) strains with anti-listerial activity, and their effects on Listeria monocytogenes during refrigerated shelf-life of soft Minas cheese and ripening of semi-hard Minas cheese. LAB strains (n = 891) isolated from Minas artisanal cheeses (n = 244) were assessed for anti-listerial activity by deferred antagonism assay at 37 °C and 7 °C...
August 2018: Food Microbiology
https://www.readbyqxmd.com/read/29525709/assessment-of-the-disinfection-capacity-and-eco-toxicological-impact-of-atmospheric-cold-plasma-for-treatment-of-food-industry-effluents
#19
Apurva Patange, Daniela Boehm, Michelle Giltrap, Peng Lu, P J Cullen, Paula Bourke
Generation of wastewater is one of the main environmental sustainability issues across food sector industries. The constituents of food process effluents are often complex and require high energy and processing for regulatory compliance. Wastewater streams are the subject of microbiological and chemical criteria, and can have a significant eco-toxicological impact on the aquatic life. Thus, innovative treatment approaches are required to mitigate environmental impact in an energy efficient manner. Here, dielectric barrier discharge atmospheric cold plasma (ACP) was evaluated for control of key microbial indicators encountered in food industry effluent...
August 1, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29480371/antirotaviral-potential-of-lactoferrin-from-different-origin-effect-of-thermal-and-high-pressure-treatments
#20
José Antonio Parrón, Daniel Ripollés, Sergio José Ramos, María Dolores Pérez, Zeynep Semen, Pedro Rubio, Miguel Calvo, Lourdes Sánchez
Rotaviral gastroenteritis causes a high rate of infant mortality and severe healthcare implications worldwide. Several studies have pointed out that human milk and dairy fractions, such as whey and buttermilk, possess antirotaviral activity. This activity has been mainly associated with glycoproteins, among them lactoferrin (LF). Thermal treatments are necessary to provide microbiological safety and extend the shelf life of milk products, though they may diminish their biological value. High hydrostatic pressure (HHP) treatment is a non-thermal method that causes lower degradation of food components than other treatments...
February 26, 2018: Biometals: An International Journal on the Role of Metal Ions in Biology, Biochemistry, and Medicine
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