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Dairy microbiology

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https://www.readbyqxmd.com/read/28321788/characteristics-of-aerococcus-viridans-isolated-from-bovine-subclinical-mastitis-and-its-effect-on-milk-scc-yield-and-composition
#1
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
#2
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
#3
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
#4
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
#5
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
#6
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/28197144/detection-and-enumeration-of-spore-forming-bacteria-in-powdered-dairy-products
#7
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
#8
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...
February 2, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28139955/cattle-derived-salmonella-enterica-serovar-dublin-infections-in-red-foxes-vulpes-vulpes-in-tyrol-austria
#9
Walter Glawischnig, Judit Lazar, Alice Wallner, Christian Kornschober
Salmonella enterica serovar Dublin is endemic in the cattle population in some areas of the Austrian province Tyrol, and each year single dairy farms have experienced clinical infections. To ascertain if Tyrolean red foxes ( Vulpes vulpes ) act as a reservoir for Salmonella spp., we tested hepatic tissue and intestinal content from foxes hunted in the years 2015-2016 by using microbiological methods. In addition, we included several fox fecal samples collected on a mountain pasture near chamois carcasses in the investigation...
January 31, 2017: Journal of Wildlife Diseases
https://www.readbyqxmd.com/read/28131570/relationship-between-milk-cathelicidin-abundance-and-microbiologic-culture-in-clinical-mastitis
#10
M F Addis, V Bronzo, G M G Puggioni, C Cacciotto, V Tedde, D Pagnozzi, C Locatelli, A Casula, G Curone, S Uzzau, P Moroni
The availability of reliable tools to enable the sensitive and specific detection of mastitis in dairy cows can assist in developing control strategies and promote the more rational use of antibiotics. We have developed a milk cathelicidin ELISA that shows high sensitivity and specificity for dairy cow mastitis, based on latent class analysis. In this study, we investigated the effect of microbial agents on cathelicidin abundance in the milk of cows with clinical mastitis. We subjected 535 quarter milk samples (435 from quarters showing signs of clinical mastitis and 100 from healthy quarters as a control) to milk cathelicidin ELISA, somatic cell count (SCC), and microbiologic culture...
January 25, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28094204/microbial-contamination-of-drinking-water-from-risky-tubewells-situated-in-different-hydrological-regions-of-bangladesh
#11
Nepal C Dey, Mahmood Parvez, Digbijoy Dey, Ratnajit Saha, Lucky Ghose, Milan K Barua, Akramul Islam, Mushtaque R Chowdhury
This study, conducted in 40 selected upazilas covering four hydrological regions of Bangladesh, aimed at determining the risk of selected shallow tubewells (depth<30m) used for drinking purpose (n=26,229). This was based on WHO's sanitary inspection guidelines and identifying the association of sanitary inspection indicators and risk scores with microbiological contamination of shallow tubewells. The main objective of the study was to observe the seasonal and regional differences of microbial contamination and finally reaching a conclusion about safe distance between tubewells and latrines by comparing the contamination of two tubewell categories (category-1: distance ≤10m from nearest latrine; n=80 and category 2: distances 11-20m from nearest latrine; n=80) in different geographical contexts...
December 29, 2016: International Journal of Hygiene and Environmental Health
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
#12
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/27956766/enterohemorrhagic-escherichia-coli-o157-in-milk-and-dairy-products-from-libya-isolation-and-molecular-identification-by-partial-sequencing-of-16s-rdna
#13
Aboubaker M Garbaj, Enas M Awad, Salah M Azwai, Said K Abolghait, Hesham T Naas, Ashraf A Moawad, Fatim T Gammoudi, Ilaria Barbieri, Ibrahim M Eldaghayes
AIM: The aim of this work was to isolate and molecularly identify enterohemorrhagic Escherichia coli (EHEC) O157 in milk and dairy products in Libya, in addition; to clear the accuracy of cultural and biochemical identification as compared with molecular identification by partial sequencing of 16S rDNA for the existing isolates. MATERIALS AND METHODS: A total of 108 samples of raw milk (cow, she-camel, and goat) and locally made dairy products (fermented cow's milk, Maasora, Ricotta and ice cream) were collected from some regions (Janzour, Tripoli, Kremiya, Tajoura and Tobruk) in Libya...
November 2016: Veterinary World
https://www.readbyqxmd.com/read/27899431/monitoring-process-water-quality-using-near-infrared-spectroscopy-and-partial-least-squares-regression-with-prediction-uncertainty-estimation
#14
Peter B Skou, Thilo A Berg, Stina D Aunsbjerg, Dorrit Thaysen, Morten A Rasmussen, Frans van den Berg
Reuse of process water in dairy ingredient production-and food processing in general-opens the possibility for sustainable water regimes. Membrane filtration processes are an attractive source of process water recovery since the technology is already utilized in the dairy industry and its use is expected to grow considerably. At Arla Foods Ingredients (AFI), permeate from a reverse osmosis polisher filtration unit is sought to be reused as process water, replacing the intake of potable water. However, as for all dairy and food producers, the process water quality must be monitored continuously to ensure food safety...
March 2017: Applied Spectroscopy
https://www.readbyqxmd.com/read/27898868/relationships-among-ensiling-nutritional-fermentative-microbiological-traits-and-contamination-in-corn-silages-addressed-with-partial-least-squares-regression
#15
A Gallo, D Bassi, R Esposito, M Moschini, P S Cocconcelli, F Masoero
The objective of this work was to reduce the predictor dimensionality and to develop a model able to forecast contamination in corn silages. A survey on 33 dairy farms was performed, and samples from core, lateral, and apical parts of the feed-out face of corn silage bunkers were analyzed for chemical, biological (digestible and indigestible NDF), fermentative (pH, ammonia nitrogen, lactic acid, VFA, and ethanol), and microbiological (yeasts and molds) traits. Corn silage samples were analyzed for cell and spore counts by adoption of a molecular DNA-based method...
October 2016: Journal of Animal Science
https://www.readbyqxmd.com/read/27892875/the-zoonotic-potential-of-lactococcus-garvieae-an-overview-on-microbiology-epidemiology-virulence-factors-and-relationship-with-its-presence-in-foods
#16
REVIEW
Alicia Gibello, Fátima Galán-Sánchez, M Mar Blanco, Manuel Rodríguez-Iglesias, Lucas Domínguez, José F Fernández-Garayzábal
Lactococcus garvieae is a relevant worldwide fish pathogen affecting various farmed and wild marine and freshwater species. It has also been isolated from other animals, such as ruminants with subclinical mastitis and pigs with pneumonia. From the early 90s, L. garvieae has been associated with different human infections, mainly endocarditis. During the last five years, human infections by this bacterium appear to be increasing, likely due to the improvement in microbiological methods for bacterial identification and the alertness of this bacterium by physicians...
December 2016: Research in Veterinary Science
https://www.readbyqxmd.com/read/27889140/genotyping-of-methicillin-resistant-staphylococcus-aureus-mrsa-isolated-from-milk-and-dairy-products-in-south-italy
#17
M G Basanisi, G La Bella, G Nobili, I Franconieri, G La Salandra
Methicillin-resistant Staphylococcus aureus (MRSA) is a pathogen emerging in hospitals as well as community and livestock. MRSA is a significant and costly public health concern because it may enter the human food chain and contaminate milk and dairy products causing foodborne illness. This study aimed to determine the occurrence and the characteristics of MRSA isolated from 3760 samples of milk and dairy products in a previous survey conducted in southern Italy during 2008-2014. Overall out of 484 S. aureus strains isolated, 40 (8...
April 2017: Food Microbiology
https://www.readbyqxmd.com/read/27866041/study-of-the-bacterial-diversity-of-foods-pcr-dgge-versus-lh-pcr
#18
Cristiana Garofalo, Elena Bancalari, Vesna Milanović, Federica Cardinali, Andrea Osimani, Maria Luisa Savo Sardaro, Benedetta Bottari, Valentina Bernini, Lucia Aquilanti, Francesca Clementi, Erasmo Neviani, Monica Gatti
The present study compared two culture-independent methods, polymerase chain reaction denaturing gradient gel electrophoresis (PCR-DGGE) and length-heterogeneity polymerase chain reaction (LH-PCR), for their ability to reveal food bacterial microbiota. Total microbial DNA and RNA were extracted directly from fourteen fermented and unfermented foods, and domain A of the variable regions V1 and V2 of the 16S rRNA gene was analyzed through LH-PCR and PCR-DGGE. Finally, the outline of these analyses was compared with bacterial viable counts obtained after bacterial growth on suitable selective media...
February 2, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/27828758/gentamicin-and-ciprofloxacin-resistant-enterobacteriaceae-in-cattle-farms-in-israel-risk-factors-for-carriage-and-the-effect-of-microbiological-methodology-on-the-measured-prevalence
#19
Amos Adler, Na'ama Sturlesi, Noga Fallach, Deniz Zilberman-Barzilai, Omar Hussein, Shlomo E Blum, Eyal Klement, Mitchell J Schwaber, Yehuda Carmeli
Our objectives were to establish a methodology for surveillance of ciprofloxacin-resistant Enterobacteriaceae and gentamicin-resistant Enterobacteriaceae (CPRE and GNRE, respectively) in cattle and to study the prevalence and risk factors for carriage of these bacteria in a national survey. This was a point prevalence study conducted from July to October 2013 in Israel. Stool samples were collected from 1,226 cows in 123 sections of 40 farms of all production types. The number of CPRE- and GNRE-positive cows was highest in quarantine stations and fattening farms and was lowest in pasture farms (p < 0...
November 9, 2016: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/27822529/thermus-and-the-pink-discoloration-defect-in-cheese
#20
Lisa Quigley, Daniel J O'Sullivan, David Daly, Orla O'Sullivan, Zuzana Burdikova, Rostislav Vana, Tom P Beresford, R Paul Ross, Gerald F Fitzgerald, Paul L H McSweeney, Linda Giblin, Jeremiah J Sheehan, Paul D Cotter
A DNA sequencing-based strategy was applied to study the microbiology of Continental-type cheeses with a pink discoloration defect. The basis for this phenomenon has remained elusive, despite decades of research. The bacterial composition of cheese containing the defect was compared to that of control cheese using 16S rRNA gene and shotgun metagenomic sequencing as well as quantitative PCR (qPCR). Throughout, it was apparent that Thermus, a carotenoid-producing genus, was present at higher levels in defect-associated cheeses than in control cheeses...
May 2016: MSystems
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