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Dairy microbiology

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https://www.readbyqxmd.com/read/28631590/comparative-evaluation-of-veriflow-%C3%A2-salmonella-species-to-usda-and-fda-culture-based-methods-for-the-detection-of-salmonella-spp-in-food-and-environmental-samples
#1
Amrita Puri, Adam C Joelsson, Shawn P Terkhorn, Ashley S Brown, Zara E Gaudioso, Nicholas A Siciliano
Veriflow(®)Salmonella species (Veriflow SS)is a molecular-based assay for the presumptive detection of Salmonella spp. from environmental surfaces (stainless steel, sealed concrete, plastic, and ceramic tile), dairy (2% milk), raw meat (20% fat ground beef), chicken carcasses, and ready-to-eat (RTE) food (hot dogs). The assay utilizes a PCR detection method coupled with a rapid, visual, flow-based assay that develops in 3 min post-PCR amplification and requires only an 18 h enrichment for maximum sensitivity...
June 20, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/28576377/microbiological-biochemical-and-functional-aspects-of-sugary-kefir-fermentation-a-review
#2
REVIEW
Fernanda Assumpção Fiorda, Gilberto Vinicius de Melo Pereira, Vanete Thomaz-Soccol, Sudip Kumar Rakshit, Maria Giovana Binder Pagnoncelli, Luciana Porto de Souza Vandenberghe, Carlos Ricardo Soccol
Sugary kefir beverage is produce by fermenting raw sugar solution with kefir grains, the latter consisting of polysaccharide and microorganisms. This beverage, with great consumption in countries such as USA, Japan, France, and Brazil, represents a promising market to functional cultured drinks. This paper reviews the microbial diversity and interaction, kinetics, safety, and bioactivities of sugary kefir fermentation. The literature reviewed here demonstrates that sugary kefir possesses a similar microbial association relative to traditional milk kefir fermentation, especially among lactic acid bacteria and yeast species, such as Lactobacillus, Leuconostoc, Kluyveromyces, Pichia, and Saccharomyces...
September 2017: Food Microbiology
https://www.readbyqxmd.com/read/28558861/animal-board-invited-review-comparing-conventional-and-organic-livestock-production-systems-on-different-aspects-of-sustainability
#3
C P A van Wagenberg, Y de Haas, H Hogeveen, M M van Krimpen, M P M Meuwissen, C E van Middelaar, T B Rodenburg
To sustainably contribute to food security of a growing and richer world population, livestock production systems are challenged to increase production levels while reducing environmental impact, being economically viable, and socially responsible. Knowledge about the sustainability performance of current livestock production systems may help to formulate strategies for future systems. Our study provides a systematic overview of differences between conventional and organic livestock production systems on a broad range of sustainability aspects and animal species available in peer-reviewed literature...
May 31, 2017: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/28556679/molecular-characterization-and-risk-assessment-of-bacillus-cereus-sensu-lato-isolated-from-ultrahigh-temperature-and-pasteurized-milk-marketed-in-rio-de-janeiro-brazil
#4
Jeane Q Chaves, Eislaine P de Paiva, Leon Rabinovitch, Adriana M Vivoni
The presence of Bacillus cereus in milk is a major concern in the dairy industry. In this study 27 Bacillus cereus sensu lato isolates from pasteurized and ultrahigh-temperature (UHT) milk (24 whole UHT and 4 pasteurized samples) collected at supermarket chains in Rio de Janeiro, Brazil, were evaluated to assess the potential risk for food poisoning. Toxigenic and virulence profiles were defined by gene-specific PCR. Affiliation to phylogenetic groups was assigned by panC sequencing. Microbiological analysis revealed the presence of B...
May 30, 2017: Journal of Food Protection
https://www.readbyqxmd.com/read/28545485/bacteriological-etiology-and-treatment-of-mastitis-in-finnish-dairy-herds
#5
Johanna Vakkamäki, Suvi Taponen, Anna-Maija Heikkilä, Satu Pyörälä
BACKGROUND: The Finnish dairy herd recording system maintains production and health records of cows and herds. Veterinarians and farmers register veterinary treatments in the system. Milk samples for microbiological analysis are routinely taken from mastitic cows. The laboratory of the largest dairy company in Finland, Valio Ltd., analyzes most samples using real-time PCR. This study addressed pathogen-specific microbiological data and treatment and culling records, in combination with cow and herd characteristics, from the Finnish dairy herd recording system during 2010-2012...
May 25, 2017: Acta Veterinaria Scandinavica
https://www.readbyqxmd.com/read/28527800/from-pre-to-postweaning-transformation-of-the-young-calf-s-gastrointestinal-tract
#6
Sarah J Meale, Frederique Chaucheyras-Durand, Harma Berends, Le Luo Guan, Michael A Steele
The ruminant gastrointestinal tract (GIT) faces the challenge of protecting the host from luminal contents and pathogens, while supporting the absorption and metabolism of nutrients for growth and maintenance. The GIT of the calf in early life undergoes some of the most rapid microbial and structural changes documented in nature, and these adaptations in GIT function make the young calf susceptible to GIT diseases and disorders. Despite these challenges, the calf's GIT has a certain degree of plasticity and can sense nutrient supply and respond to bioactive ingredients...
July 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28492472/molecular-surveillance-of-cronobacter-spp-isolated-from-a-wide-variety-of-foods-from-44-different-countries-by-sequence-typing-of-16s-rrna-rpob-and-o-antigen-genes
#7
Nancy Miranda, Pratik Banerjee, Steven Simpson, Khalil Kerdahi, Irshad M Sulaiman
Cronobacter spp. are emerging infectious bacteria that can cause acute meningitis and necrotizing enterocolitis in neonatal and immunocompromised individuals. Although this opportunistic human-pathogenic microorganism has been isolated from a wide variety of food and environmental samples, it has been primarily linked to foodborne outbreaks associated with powdered infant formula. The U.S. Food and Drug Administration use the presence of these microbes as one of the criteria to assess food adulteration and to implement regulatory actions...
May 11, 2017: Foods (Basel, Switzerland)
https://www.readbyqxmd.com/read/28492313/size-composition-and-source-profiles-of-inhalable-bioaerosols-from-colorado-dairies
#8
Joshua W Schaeffer, Stephen Reynolds, Sheryl Magzamen, Amanda VanDyke, Neil R Gottel, Jack A Gilbert, Sarah M Owens, Jarrad T Hampton-Marcell, John Volckens
Particulate matter emissions from agricultural livestock operations contain both chemical and biological constituents that represent a potential human health hazard. The size and composition of these dusts, however, have not been well described. We evaluated the full size distribution (from 0 to 100 μm in aerodynamic diameter) and chemical/biological composition of inhalable dusts inside several Colorado dairy parlors. Four aerodynamic size fractions (<3, 3-10, 10-30, and >30 μm) were collected and analyzed using a combination of physiochemical techniques to understand the structure of bacterial communities and chemical constituents...
June 6, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28451663/the-effect-of-isabel-grape-addition-on-the-physicochemical-microbiological-and-sensory-characteristics-of-probiotic-goat-milk-yogurt
#9
Francyeli Araújo Silva, Maria Elieidy Gomes de Oliveira, Rossana Maria Feitosa de Figueirêdo, Karoliny Brito Sampaio, Evandro Leite de Souza, Carlos Eduardo Vasconcelos de Oliveira, Maria Manuela Estevez Pintado, Rita de Cássia Ramos do Egypto Queiroga
Goat milk is an attractive food because of its nutritional properties, easy digestibility and hypoallergenicity. Goat milk yogurt is an appropriate matrix for the inclusion of new ingredients such as probiotic cultures, fruit and its derivatives. Grapes are rich in polyphenols and recognized for their health benefits. The aim of this study was to improve the quality characteristics of probiotic goat milk yogurt by the addition of an Isabel grape (Vitis labrusca L.) preparation (IGP). For this, the influence of the addition of IGP on the physicochemical, microbiological and sensory characteristics of goat milk yogurt containing the probiotic Lactobacillus acidophilus LA-05 was evaluated during 28 days of refrigerated storage (5 ± 0...
April 28, 2017: Food & Function
https://www.readbyqxmd.com/read/28434737/short-communication-microbiological-quality-of-raw-cow-milk-and-its-association-with-herd-management-practices-in-northern-china
#10
X Y Lan, S G Zhao, N Zheng, S L Li, Y D Zhang, H M Liu, J McKillip, J Q Wang
Contamination of raw milk with bacterial pathogens is potentially hazardous to human health. The aim of this study was to evaluate the total bacteria count (TBC) and presence of pathogens in raw milk in Northern China along with the associated herd management practices. A total of 160 raw milk samples were collected from 80 dairy herds in Northern China. All raw milk samples were analyzed for TBC and pathogens by culturing. The results showed that the number of raw milk samples with TBC <2 × 10(6) cfu/mL and <1 × 10(5) cfu/mL was 146 (91...
April 20, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28403147/cryptosporidium-spp-and-giardia-spp-in-feces-and-water-and-the-associated-exposure-factors-on-dairy-farms
#11
Roberta Dos Santos Toledo, Felippe Danyel Cardoso Martins, Fernanda Pinto Ferreira, Jonatas Campos de Almeida, Liza Ogawa, Hannah Lia Ettiene Peruch Lemos Dos Santos, Maíra Moreira Dos Santos, Filipe Aguera Pinheiro, Italmar Teodorico Navarro, João Luis Garcia, Roberta Lemos Freire
The aims of this study were to verify the prevalence of Cryptosporidium spp. and Giardia spp. in animal feces and drinking water on dairy farms and to identify a possible relation between the exposure factors and the presence of these parasites. Fecal samples from cattle and humans and water samples were collected on dairy farms in Paraná, Brazil. Analysis of (oo)cysts in the feces was performed by the modified Ziehl-Neelsen staining and centrifugal flotation in zinc sulfate. Test-positive samples were subjected to nested PCR amplification of the 18SSU ribosomal RNA gene for identification of Cryptosporidium and Giardia and of the gp60 gene for subtyping of Cryptosporidium...
2017: PloS One
https://www.readbyqxmd.com/read/28341052/factors-associated-with-intramammary-infection-in-dairy-cows-caused-by-coagulase-negative-staphylococci-staphylococcus-aureus-streptococcus-uberis-streptococcus-dysgalactiae-corynebacterium-bovis-or-escherichia-coli
#12
S Taponen, E Liski, A-M Heikkilä, S Pyörälä
The aim of this study was to determine risk factors for bovine intramammary infection (IMI) associated with the most common bacterial species in Finland. Large databases of the Finnish milk-recording system and results of microbiological analyses of mastitic milk samples from Valio Ltd. (Helsinki, Finland) were analyzed. The study group comprised 29,969 cows with IMI from 4,173 dairy herds. A cow with a quarter milk sample in which DNA of target species was detected in the PathoProof Mastitis PCR Assay (Thermo Fisher Scientific, Waltham, MA) was determined to have IMI...
January 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28321788/characteristics-of-aerococcus-viridans-isolated-from-bovine-subclinical-mastitis-and-its-effect-on-milk-scc-yield-and-composition
#13
Meng Sun, Jian Gao, Tariq Ali, Dan Yu, Shiyao Zhang, Saeed U Khan, Séamus Fanning, Bo Han
Aerococcus viridians (A. viridans), an environmental Gram-positive bacterium, has been documented to be associated with bovine mastitis. However, its exact role in bovine mastitis and the changes it brings about in milk characteristics are not yet known. The objectives of the current study were to describe the antibiotic resistance of A. viridans from bovine mastitis as well as the correlation between existence of this pathogen in udders and the somatic cell counts (SCC), daily milk yield, and composition of individual cow...
March 20, 2017: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/28295334/artisanal-sonoran-cheese-cocido-cheese-an-exploration-of-its-production-process-chemical-composition-and-microbiological-quality
#14
Paúl F Cuevas-González, Priscilia Y Heredia-Castro, José I Méndez-Romero, Adrián Hernández-Mendoza, Ricardo Reyes-Díaz, Belinda Vallejo-Cordoba, Aarón F González-Córdova
BACKGROUND: The objective of this study was to explore and document the production process of artisanal Cocido cheese and to determine its chemical composition and microbiological quality, considering samples from six dairies and four retailers. RESULTS: Cocido cheese is a semi-hard (506-555 g kg(-1) of moisture), medium fat (178.3-219.1 g kg(-1) ), pasta filata-type cheese made from raw whole cow's milk. The production process is not standardized and therefore the chemical and microbiological components of the sampled cheeses varied...
March 10, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28280791/microbiological-and-biochemical-aspects-of-inland-pecorino-abruzzese-cheese
#15
Valeria Centi, Federica Matteucci, Aldo Lepidi, Maddalena Del Gallo, Claudia Ercole
Little is known on physicochemical and biochemical characteristics of "Pecorino" Abruzzese cheese in L'Aquila province, an artisanal cheese produced from ewe raw full-cream milk. Three batches of inland "Pecorino" Abruzzese cheese were examined for microbiological, compositional, biochemical and sensory characteristics at the aim of isolating and storing in a bacterial collection, indigenous strain to preserve the microbial biodiversity present in this cheese, to a possible definition of a PDO. Cheese samples from three dairies, at different stages of production were collected and 148 colonies were characterized...
February 2017: Heliyon
https://www.readbyqxmd.com/read/28271855/prevalence-of-foodborne-pathogens-in-food-from-selected-african-countries-a-meta-analysis
#16
REVIEW
Narayan Paudyal, Victor Anihouvi, Joseph Hounhouigan, Maitshwarelo Ignatius Matsheka, Bonno Sekwati-Monang, Wisdom Amoa-Awua, Amy Atter, Nina Bernice Ackah, Samuel Mbugua, Agnes Asagbra, Warda Abdelgadir, Jesca Nakavuma, Mogens Jakobsen, Weihuan Fang
Food safety information in the African region is insufficient and fragmented due to lack of surveillance, documentation and reporting, thereby resulting in inefficient utilization of resources, duplication of activities, and lack of synergy among the countries of the region. This paper reviews the prevalence of foodborne pathogens in seven African countries (Benin, Botswana, Ghana, Kenya, Nigeria, Sudan and Uganda) from papers in regional or international journals published between January 2000 and December 2015...
March 6, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28252354/microbiological-quality-of-raw-milk-attributable-to-prolonged-refrigeration-conditions
#17
Nuwan R Vithanage, Muditha Dissanayake, Greg Bolge, Enzo A Palombo, Thomas R Yeager, Nivedita Datta
Refrigerated storage of raw milk is a prerequisite in dairy industry. However, temperature abused conditions in the farming and processing environments can significantly affect the microbiological quality of raw milk. Thus, the present study investigated the effect of different refrigeration conditions such as 2, 4, 6, 8, 10 and 12 °C on microbiological quality of raw milk from three different dairy farms with significantly different initial microbial counts. The bacterial counts (BC), protease activity (PA), proteolysis (PL) and microbial diversity in raw milk were determined during storage...
February 2017: Journal of Dairy Research
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
#18
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)...
May 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28197144/detection-and-enumeration-of-spore-forming-bacteria-in-powdered-dairy-products
#19
REVIEW
Aoife J McHugh, Conor Feehily, Colin Hill, Paul D Cotter
With the abolition of milk quotas in the European Union in 2015, several member states including Ireland, Luxembourg, and Belgium have seen year on year bi-monthly milk deliveries to dairies increase by up to 35%. Milk production has also increased outside of Europe in the past number of years. Unsurprisingly, there has been a corresponding increased focus on the production of dried milk products for improved shelf life. These powders are used in a wide variety of products, including confectionery, infant formula, sports dietary supplements and supplements for health recovery...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28155071/sequential-application-of-waste-whey-as-a-medium-component-for-kluyveromyces-lactis-cultivation-and-a-co-feeder-for-lipase-immobilization-by-clea-method
#20
Aušra Veteikytė, Rimantas Šiekštelė, Bronius Tvaska, Inga Matijošytė
Currently, much attention is paid to technologies which can be drivers of the circular economy across different sectors, in particular, to develop technologies for utilization or reusability of biocompatible materials from industrial waste. One of such is the milk whey, which is a cheap biobased raw material, the disposal of which is a major problem for the dairy industry. Our proposed and investigated technology is based on a continuous exploitation of the whey combining microbiology and biotechnology. Primarily, whey was used as a nutrition source for the cultivation of Kluyveromyces lactis with the aim to produce the targeted biocatalyst-lipase...
May 2017: Applied Microbiology and Biotechnology
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