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Dairy microbiology

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https://www.readbyqxmd.com/read/29287761/brucellosis-in-west-and-central-africa-a-review-of-the-current-situation-in-a-changing-landscape-of-dairy-cattle-systems
#1
REVIEW
L Craighead, A Meyer, B Chengat, I Musallam, J Akakpo, P Kone, J Guitian, B Häsler
Brucellosis is a neglected endemic zoonosis in West and Central Africa. In this narrative review, evidence of livestock and human infection is presented along with details of past and current control strategies in 14 selected countries. Data from available literature is combined with expert opinion elicited during a regional workshop on brucellosis diagnostics. Demographic changes that affect both the epidemiology of brucellosis and the success of control or surveillance are also considered. The evidence suggests that brucellosis prevalence in emerging peri-urban dairy cattle systems may be higher than that found in traditional transhumant extensive systems...
December 26, 2017: Acta Tropica
https://www.readbyqxmd.com/read/29274959/short-communication-snapshot-of-industry-milk-hauling-practices-in-the-western-united-states
#2
Eva Kuhn, Lisbeth Meunier-Goddik, Joy G Waite-Cusic
The Pasteurized Milk Ordinance (PMO) mandates milk hauling sanitation and operational practices; however, the use of vague language (i.e., "as needed") and gaps in processes lead to variability in industry practices. Our aim was to characterize industry milk hauling practices and identify areas that may be an unexplained source of contamination in the dairy processing continuum, and communicate this information with industry to cultivate best practices. The objectives of this study were to (1) survey industry hauling sanitation and operation practices in the Pacific Northwest region of the United States, and (2) quantify microbial populations [aerobic plate count (APC), lactic acid bacteria, coliforms] on the internal surfaces of transfer hoses (tanker and receiving bay) to determine their potential contribution to the microbiological quality of raw milk...
December 20, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/29248213/effect-of-leaving-milk-trucks-empty-and-idle-for-6-h-between-raw-milk-loads
#3
Eva Kuhn, Lisbeth Meunier-Goddik, Joy G Waite-Cusic
The US Pasteurized Milk Ordinance (PMO) allows milk tanker trucks to be used repeatedly for 24 h before mandatory clean-in-place cleaning, but no specifications are given for the length of time a tanker can be empty between loads. We defined a worst-case hauling scenario as a hauling vessel left empty and dirty (idle) for extended periods between loads, especially in warm weather. Initial studies were conducted using 5-gallon milk cans (pilot-scale) as a proof-of-concept and to demonstrate that extended idle time intervals could contribute to compromised raw milk quality...
December 13, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/29241025/antimicrobial-usage-and-risk-of-retreatment-for-mild-to-moderate-clinical-mastitis-cases-on-dairy-farms-following-on-farm-bacterial-culture-and-selective-therapy
#4
S McDougall, J Niethammer, L E Graham
AIMS: To assess antimicrobial usage for treatment of mild to moderate clinical mastitis, and risk of retreatment, following implementation of an on-farm bacterial culture system and selective therapy based on culture results, and to assess compliance with treatment decision tree protocols and the level of agreement between results from on-farm culture and laboratory-based microbiology methods. MATERIALS AND METHODS: Herdowners from seven dairy herds were asked to collect milk samples from cases of mild to moderate clinical mastitis between July 2015 and May 2016...
December 14, 2017: New Zealand Veterinary Journal
https://www.readbyqxmd.com/read/29224881/early-lactation-extended-pirlimycin-therapy-against-naturally-acquired-staphylococcus-aureus-intramammary-infections-in-heifers-a-randomized-controlled-trial
#5
S Skoulikas, S Dufour, D Haine, J-Y Perreault, J-P Roy
The primary objective of the current study was to evaluate cure rate following an early-lactation extended intramammary pirlimycin treatment on heifers naturally infected by Staphylococcus aureus. The secondary objective was to assess Petrifilm Staph Express (3M Microbiology, St. Paul, MN) count plate characteristics when used in a protocol for early-lactation detection of infected quarters in heifers. Milk samples were collected from heifers (n = 946) in the first few days following calving (mean = 5 d). Heifers with laboratory-confirmed S...
December 7, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/29218304/from-invention-to-innovation-risk-analysis-to-integrate-one-health-technology-in-the-dairy-farm
#6
Andrea Lombardo, Carlo Boselli, Simonetta Amatiste, Simone Ninci, Chiara Frazzoli, Roberto Dragone, Alberto De Rossi, Gerardo Grasso, Alberto Mantovani, Giovanni Brajon
Current Hazard Analysis Critical Control Points (HACCP) approaches mainly fit for food industry, while their application in primary food production is still rudimentary. The European food safety framework calls for science-based support to the primary producers' mandate for legal, scientific, and ethical responsibility in food supply. The multidisciplinary and interdisciplinary project ALERT pivots on the development of the technological invention (BEST platform) and application of its measurable (bio)markers-as well as scientific advances in risk analysis-at strategic points of the milk chain for time and cost-effective early identification of unwanted and/or unexpected events of both microbiological and toxicological nature...
2017: Frontiers in Public Health
https://www.readbyqxmd.com/read/29207709/isolation-of-the-rare-opportunistic-yeast-saprochaete-capitata-from-clinical-samples-experience-from-a-tertiary-care-hospital-in-southern-india-and-a-brief-review-of-the-literature
#7
Umabala Pamidimukkala, Anuradha Kancharla, Sukanya Sudhaharan, Sadashivudu Gundeti, Surendra Mandarapu, Vamsi Krishna Nagalla, Sree Bhushan Raju, Sandhya Devi Karanam
Introduction: Saprochaete capitata (Teleomorph: Magnusiomyces capitatus) is a ubiquitous yeast found in environmental sources such as soil, water, air, plants and dairy products. It is also a part of the normal microbial flora in humans. The yeast is being increasingly reported as an opportunistic pathogen, especially in patients in the haemato-oncology setting, the infection being often mistakenly diagnosed as invasive candidiasis. Aim: To review the epidemiological, clinical and microbiological features of six patients admitted in our hospital over a period of 10 years (from January 2007 to December 2016), from whom Saprochaete capitata was isolated...
September 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/29180375/formation-and-characterization-of-early-bacterial-biofilms-on-different-wood-typologies-applied-in-dairy-production
#8
Margherita Cruciata, Raimondo Gaglio, Maria Luisa Scatassa, Giovanna Sala, Cinzia Cardamone, Marisa Palmeri, Giancarlo Moschetti, Tommaso La Mantia, Luca Settanni
Main hypothesis: Sicilian forestry resources are suitable for the production of equipment to be used in cheese making and indigenous milk lactic acid bacteria (LAB) are able to develop stable biofilms providing starter and non starter cultures necessary for curd fermentation and cheese ripening, respectively. Hence, the present work was carried out to evaluate LAB biofilm formation on different woods derived from trees species grown in Sicily with deproteinized whey. Microbiological and scanning electron microscopy analyses showed minimal differences in microbial levels and composition for the neoformed biofilms...
November 27, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29166174/low-prevalence-of-salmonella-and-shiga-toxin-producing-escherichia-coli-in-lymph-nodes-of-australian-beef-cattle
#9
Gavin Bailey, Long Huynh, Lachlan Govenlock, David Jordan, Ian Jenson
Salmonella contamination of ground beef has been viewed as originating from the surface of carcasses. Recent studies have identified lymph nodes as a potential source of Salmonella contamination because these tissues play an active role in containment of pathogens in the live animal and because some lymph nodes are unavoidably present in manufacturing beef trimmings or primal cuts that may be incorporated into ground beef. A survey was conducted of the microbiological status of lymph nodes from Australian cattle at the time of slaughter to determine the prevalence of microbiological contamination...
November 22, 2017: Journal of Food Protection
https://www.readbyqxmd.com/read/29157376/epidemiological-and-partial-budget-analysis-for-treatment-of-subclinical-staphylococcus-aureus-intramammary-infections-considering-microbiological-and-cytological-scenarios
#10
Inge-Marié Petzer, Eric M C Etter, Edward F Donkin, Edward C Webb, Joanne Karzis
An innovative method was investigated to aid in the elimination of Staphylococcus aureus (S. aureus) intramammary infections (IMI) from dairy herds. A stochastic model explore the economic benefit of three-day or eight-day treatment of subclinical IMI in all S. aureus infected cows or in only those with a somatic cell count (SCC) exceeding 200,000 cells/ml. An epidemiological model was developed to run parallel to the economic model that would predict the S. aureus IMI likely to persist, develop new infections and clinical mastitis...
December 1, 2017: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/29153181/a-100-year-review-microbiology-and-safety-of-milk-handling
#11
Kathryn J Boor, Martin Wiedmann, Sarah Murphy, Sam Alcaine
Microbes that may be present in milk can include pathogens, spoilage organisms, organisms that may be conditionally beneficial (e.g., lactic acid bacteria), and those that have not been linked to either beneficial or detrimental effects on product quality or human health. Although milk can contain a full range of organisms classified as microbes (i.e., bacteria, viruses, fungi, and protozoans), with few exceptions (e.g., phages that affect fermentations, fungal spoilage organisms, and, to a lesser extent, the protozoan pathogens Cryptosporidium and Giardia) dairy microbiology to date has focused predominantly on bacteria...
December 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/29153179/a-100-year-review-a-century-of-dairy-processing-advancements-pasteurization-cleaning-and-sanitation-and-sanitary-equipment-design
#12
S A Rankin, R L Bradley, G Miller, K B Mildenhall
Over the past century, advancements within the mainstream dairy foods processing industry have acted in complement with other dairy-affiliated industries to produce a human food that has few rivals with regard to safety, nutrition, and sustainability. These advancements, such as milk pasteurization, may appear commonplace in the context of a modern dairy processing plant, but some consideration of how these advancements came into being serve as a basis for considering what advancements will come to bear on the next century of processing advancements...
December 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/29152416/microbial-agents-in-macroscopically-healthy-mammary-gland-tissues-of-small-ruminants
#13
Liliana Spuria, Elena Biasibetti, Donal Bisanzio, Ilaria Biasato, Daniele De Meneghi, Patrizia Nebbia, Patrizia Robino, Paolo Bianco, Michele Lamberti, Claudio Caruso, Alessia Di Blasio, Simone Peletto, Loretta Masoero, Alessandro Dondo, Maria Teresa Capucchio
Background: Health of mammary glands is fundamental for milk and dairy products hygiene and quality, with huge impacts on consumers welfare. Methods: This study aims to investigate the microbial agents (bacteria, fungi and lentiviruses) isolated from 89 macroscopically healthy udders of regularly slaughtered small ruminants (41 sheep, 48 goats), also correlating their presence with the histological findings. Multinomial logistic regression was applied to evaluate the association between lesions and positivity for different microbial isolates, animal age and bacteria...
2017: PeerJ
https://www.readbyqxmd.com/read/29131683/persistence-of-non-o157-shiga-toxin-producing-escherichia-coli-in-dairy-compost-during-storage
#14
Hongye Wang, Muthu Dharmasena, Zhao Chen, Xiuping Jiang
Dairy compost with 20, 30, or 40% moisture content (MC) was inoculated with a mixture of six non-O157 Shiga toxin-producing Escherichia coli (STEC) serovars at a final concentration of 5.1 log CFU/g and then stored at 22 and 4°C for 125 days. Six storage conditions-4°C and 20% MC, 4°C and 30% MC, 4°C and 40% MC, 22°C and 20% MC, 22°C and 30% MC, and 22°C and 40% MC-were investigated for the persistence of non-O157 STEC in the dairy compost. During the entire storage, fluctuations in indigenous mesophilic bacterial levels were observed within the first 28 days of storage...
November 14, 2017: Journal of Food Protection
https://www.readbyqxmd.com/read/29119089/evaluation-of-some-microbiological-and-chemical-parameters-of-campania-buffalo-ricotta-cheese
#15
Angela M I Montone, Alessandra De Felice, Roberta Brunetti, Domenico Mollica, Salvatore Capo, Federico Capuano, Achille Guarino, Donatella Nava
Fresh ricotta (whey cheese), owing to its technological characteristics and intrinsic parameters (pH and a(w)), is an excellent substrate for the growth of spoilage and pathogenic microorganisms. On 19 July 2010, Campania buffalo ricotta cheese was assigned to the register of Protected Designations of Origin (PDO) by the European Commission, with EC Reg. 634/2010. It is mainly produced in the provinces of Caserta and Salerno around the rivers Garigliano and Volturno, the plain of the river Sele and the area of Cilento...
August 16, 2017: Italian Journal of Food Safety
https://www.readbyqxmd.com/read/29054139/mc-media-pad-acplus%C3%A2-for-enumeration-of-aerobic-counts-in-a-variety-of-foods
#16
Hajime Teramura, Gail Betts
The MC-Media Pad ACplus™ is a dry, rehydratable film medium for the enumeration of aerobic bacterial colonies.The performance of the method in a variety of foods was compared to that of U.S. reference methods: U.S. Department of Agriculture (USDA) Food Safety and Inspection Service (FSIS) Microbiology Laboratory Guidebook (MLG) Chapter 3.02 "Quantitative Analysis of Bacteria in Foods as Sanitary Indicators" (USDA/FSIS MLG 3.02); Standard Methods for the Examination of Dairy Products (SMEDP) Chapter 6 "Microbiological Count Methods, Standard Plate Count Method" (SMEDP 6); AOAC Official Method(SM)966...
October 20, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/29032653/bacterial-hormone-sensitive-lipases-bhsls-emerging-enzymes-for-biotechnological-applications
#17
REVIEW
T Doohun Kim
Lipases are important enzymes with biotechnological applications in dairy, detergent, food, fine chemicals, and pharmaceutical industries. Specifically, hormone-sensitive lipase (HSL) is an intracellular lipase that can be stimulated by several hormones, such as catecholamine, glucagon, and adrenocorticotropic hormone. Bacterial hormone-sensitive lipases (bHSLs), which are homologous to the C-terminal domain of HSL, have α/β-hydrolase fold with a catalytic triad composed of His, Asp, and Ser. These bHSLs could be used for a wide variety of industrial applications because of their high activity, broad substrate specificity, and remarkable stability...
November 28, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28987590/viable-mycobacterium-avium-ssp-paratuberculosis-isolated-from-calf-milk-replacer
#18
Irene R Grant, Antonio C G Foddai, James C Tarrant, Brenna Kunkel, Faye A Hartmann, Sheila McGuirk, Chungyi Hansen, Adel M Talaat, Michael T Collins
When advising farmers on how to control Johne's disease in an infected herd, one of the main recommendations is to avoid feeding waste milk to calves and instead feed calf milk replacer (CMR). This advice is based on the assumption that CMR is free of viable Mycobacterium avium ssp. paratuberculosis (MAP) cells, an assumption that has not previously been challenged. We tested commercial CMR products (n = 83) obtained from dairy farms around the United States by the peptide-mediated magnetic separation (PMS)-phage assay, PMS followed by liquid culture (PMS-culture), and direct IS900 quantitative PCR (qPCR)...
October 4, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28985995/aerobic-granular-sludge-technology-mechanisms-of-granulation-and-biotechnological-applications
#19
REVIEW
Y V Nancharaiah, G Kiran Kumar Reddy
Aerobic granular sludge (AGS) is a novel microbial community which allows simultaneous removal of carbon, nitrogen, phosphorus and other pollutants in a single sludge system. AGS is distinct from activated sludge in physical, chemical and microbiological properties and offers compact and cost-effective treatment for removing oxidized and reduced contaminants from wastewater. AGS sequencing batch reactors have shown their utility in the treatment of abattoir, live-stock, rubber, landfill leachate, dairy, brewery, textile and other effluents...
September 21, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28964915/novel-insights-into-the-microbiology-of-fermented-dairy-foods
#20
REVIEW
Guerrino Macori, Paul D Cotter
Fermentation is a traditional approach to food preservation that, in addition to improving food safety, also confers enhanced organoleptic, nutritional, and health-promoting attributes upon those foods. Dairy products can be fermented by a diverse microbiota. The accompanying microbes can be studied using a variety of different, including 'omics'-based, approaches that can reveal their composition and functionality. These methods have increasingly been recently applied to study fermented dairy foods from the perspective of genetic diversity, functionality and succession...
September 28, 2017: Current Opinion in Biotechnology
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