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Dairy microbiology

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https://www.readbyqxmd.com/read/27899431/monitoring-process-water-quality-using-near-infrared-spectroscopy-and-partial-least-squares-regression-with-prediction-uncertainty-estimation
#1
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...
November 29, 2016: 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
#2
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
#3
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...
September 17, 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
#4
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
#5
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...
November 10, 2016: 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
#6
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
#7
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
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
#8
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/27816242/short-communication-investigation-into-mycobacterium-avium-ssp-paratuberculosis-in-pasteurized-milk-in-italy
#9
A Serraino, P Bonilauri, F Giacometti, M Ricchi, G Cammi, S Piva, V Zambrini, A Canever, N Arrigoni
This study investigated the presence of viable Mycobacterium avium ssp. paratuberculosis (MAP) in pasteurized milk produced by Italian industrial dairy plants to verify the prediction of a previously performed risk assessment. The study analyzed 160 one-liter bottles of pasteurized milk from 2 dairy plants located in 2 different regions. Traditional cultural protocols were applied to 500 mL of pasteurized milk for each sample. The investigation focused also on the pasteurization parameters and data on the microbiological characteristics of raw milk (total bacterial count) and pasteurized milk (Enterobacteriaceae and Listeria monocytogenes)...
November 2, 2016: Journal of Dairy Science
https://www.readbyqxmd.com/read/27800167/evaluation-of-calcium-cyanamide-addition-during-co-composting-of-manure-and-maize-straw-in-a-forced-aeration-static-pile-system
#10
Huasai Simujide, Chen Aorigele, Chun-Jie Wang, Tian-Hua Zhang, Bai Manda
BACKGROUND: Composting is one of the most environmentally friendly treatments to inactivate pathogenic organisms or reduce them to acceptable levels. However, even under thermal conditions, some pathogenic organisms such as E. coli could exist for a long time in composting. Such great persistence may increase the possibility of outbreaks of these organisms and further increase the environmental load. Calcium cyanamide (CaCN2) has recently been recognized to have the fungicidal effect on the pathogens of the soilborne diseases...
2016: Journal of Environmental Health Science & Engineering
https://www.readbyqxmd.com/read/27766441/cryptosporidiosis-risk-in-new-zealand-children-under-5-years-old-is-greatest-in-areas-with-high-dairy-cattle-densities
#11
Aparna Lal, Timothy Dobbins, Nasser Bagheri, Michael G Baker, Nigel P French, Simon Hales
The public health risks associated with dairy farming intensification are an emerging concern. We examine the association between dairy cattle density and cryptosporidiosis risk in children <5 years old in New Zealand from 1997 to 2008, a period of rapid intensification of the dairy industry. Multi-level Poisson regression was used to model reported cryptosporidiosis (N = 3869 cases) incidence in relation to dairy cattle densities across urban and rural areas separately, after controlling for microbiological quality of public drinking water supplies and neighbourhood socio-economic factors using the Census Area Unit of residence...
October 20, 2016: EcoHealth
https://www.readbyqxmd.com/read/27765254/dairy-products-and-the-maillard-reaction-a-promising-future-for-extensive-food-characterization-by-integrated-proteomics-studies
#12
Simona Arena, Giovanni Renzone, Chiara D'Ambrosio, Anna Maria Salzano, Andrea Scaloni
Heating of milk and dairy products is done using various technological processes with the aim of preserving microbiological safety and extending shelf-life. These treatments result in chemical modifications in milk proteins, mainly generated as a result of the Maillard reaction. Recently, different bottom-up proteomic methods have been applied to characterize the nature of these structural changes and the modified amino acids in model protein systems and/or isolated components from thermally-treated milk samples...
March 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/27743665/the-lactococcus-genus-as-a-potential-emerging-mastitis-pathogen-group-a-report-on-an-outbreak-investigation
#13
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/27726757/preharvest-food-safety-challenges-in-beef-and-dairy-production
#14
David R Smith
Foods of animal origin, including beef and dairy products, are nutritious and important to global food security. However, there are important risks to human health from hazards that are introduced to beef and dairy products on the farm. Food safety hazards may be chemical, biological, or physical in nature. Considerations about protecting the safety of beef and dairy products must begin prior to harvest because some potential food safety hazards introduced at the farm (e.g., chemical residues) cannot be mitigated by subsequent postharvest food processing steps...
August 2016: Microbiology Spectrum
https://www.readbyqxmd.com/read/27716472/efficiency-of-a-cleaning-protocol-for-the-removal-of-enterotoxigenic-staphylococcus-aureus-strains-in-dairy-plants
#15
José Guilherme Prado Martin, Gabriela de Oliveira E Silva, Carolina Rodrigues da Fonseca, Caio Baptista Morales, Caroline Souza Pamplona Silva, Daniel Lima Miquelluti, Ernani Porto
Staphylococci are considered a major concern in dairy plants mainly due to the intensive production flow, automation of processing plants and increased demand in the microbiological quality of dairy products. This study aimed to identify S. aureus strains isolated from three Brazilian dairy plants, evaluate the influence of time, temperature and contact surface on the bacterial adhesion process, as well as the efficiency of simulated hygiene and sanitation protocol in removing adhered cells. For genotypic analyses, the presence of icaA and icaD in strains was evaluated...
December 5, 2016: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/27684204/community-wide-outbreak-of-haemolytic-uraemic-syndrome-associated-with-shiga-toxin-2-producing-escherichia-coli-o26-h11-in-southern-italy-summer-2013
#16
Cinzia Germinario, Alfredo Caprioli, Mario Giordano, Maria Chironna, Maria Serena Gallone, Silvio Tafuri, Fabio Minelli, Antonella Maugliani, Valeria Michelacci, Luisa Santangelo, Onofrio Mongelli, Cosimo Montagna, Gaia Scavia
In summer 2013, an excess of paediatric cases of haemolytic uraemic syndrome (HUS) in a southern region of Italy prompted the investigation of a community-wide outbreak of Shiga toxin 2-producing Escherichia coli (STEC) O26:H11 infections. Case finding was based on testing patients with HUS or bloody diarrhoea for STEC infection by microbiological and serological methods. A case-control study was conducted to identify the source of the outbreak. STEC O26 infection was identified in 20 children (median age 17 months) with HUS, two of whom reported severe neurological sequelae...
September 22, 2016: Euro Surveillance: Bulletin Européen sur les Maladies Transmissibles, European Communicable Disease Bulletin
https://www.readbyqxmd.com/read/27608503/a-pathogen-specific-approach-towards-udder-health-management-in-dairy-herds-using-culture-and-somatic-cell-counts-from-routine-herd-investigations
#17
Inge-Marié Petzer, Joanne Karzis, Edward F Donkin, Edward C Webb
A dedicated udder health diagnostic programme was developed and used over a 15-year period in South Africa to analyse milk samples based on microbiological and cytological patterns within various groups and for individual cows and udder quarters in dairy herds. These pathogen-specific analyses are utilised for pro-active improvement and management of udder health in South African commercial dairy herds. The programme acts as a monitoring tool and identifies management areas at risk and individual cows with udder disease and uses both quarter and composite milk samples...
2016: Onderstepoort Journal of Veterinary Research
https://www.readbyqxmd.com/read/27580103/concentrations-of-tilmicosin-in-mammary-gland-secretions-of-dairy-cows-following-subcutaneous-administration-of-one-or-two-doses-of-an-experimental-preparation-of-tilmicosin-and-its-efficacy-against-intramammary-infections-caused-by-staphylococcus-aureus
#18
Jesus Mendoza, Ismael Martínez-Cortés, Reyes López-Ordaz, Lilia Gutiérrez, Hector Sumano
OBJECTIVE To determine the concentration of tilmicosin in mammary gland secretions of dairy cows following administration of an experimental preparation once or twice during the dry period (45-day period immediately prior to calving during which cows are not milked) and to evaluate its efficacy for the treatment of cows with intramammary infections (IMIs) caused by Staphylococcus aureus at dry off (cessation of milking; first day of dry period), compared with that of an intramammary infusion of ceftiofur. ANIMALS 172 cows...
September 2016: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/27557702/impact-of-udder-and-teat-morphometry-on-udder-health-in-tharparkar-cows-under-climatic-condition-of-hot-arid-region-of-thar-desert
#19
Amit Sharma, Sanjita Sharma, Navav Singh, Vishnu Sharma, Rahul Singh Pal
Prevention of subclinical mastitis (SCM) is an important tool for sustainable dairying and implementing higher production level in animals. The present investigation involved a total of 397 quarters of milk examination of 105 indigenous Tharparkar cows at Livestock Research Centre, Chandan located in the Jaisalmer district of Rajasthan in Thar Desert to study the impact of udder and teat morphometry on udder health. Udder health was examined by somatic cell count to check the status of subclinical mastitis while udder and teat morphometry of 90 udder and 386 quarters, i...
December 2016: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/27539304/russian-kefir-grains-microbial-composition-and-its-changes-during-production-process
#20
I B Kotova, T A Cherdyntseva, A I Netrusov
By combining DGGE-PCR method, classical microbiological analysis and light- and electron microscopic observations, it was found that the composition of microbial communities of central Russia regions kefir grains, starter and kefir drink include bacteria of the genera Lactobacillus, Leuconostoc and Lactococcus, and yeast anamorphs of the genera Saccharomyces, Kazachstania and Gibellulopsis. Fifteen prokaryotic and four eukaryotic pure cultures of microorganisms were isolated and identified from kefir grains...
August 19, 2016: Advances in Experimental Medicine and Biology
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