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https://www.readbyqxmd.com/read/29605335/quantitative-polymerase-chain-reaction-coupled-with-sodium-dodecyl-sulfate-and-propidium-monoazide-for-detection-of-viable-staphylococcus-aureus-in-milk
#1
Lei Dong, Huimin Liu, Lu Meng, Mengru Xing, Jiaqi Wang, Cheng Wang, He Chen, Nan Zheng
Conventional quantitative PCR (qPCR) are unable to differentiate DNA of viable Staphylococcus aureus cells from dead ones. The aim of this study was to use sodium dodecyl sulfate (SDS) and propidium monoazide (PMA) coupled with lysostaphin to detect viable Staph. aureus. The cell suspensions were treated with SDS and PMA before DNA extraction. The SDS is an anionic surfactant, which can increase the permeability of dead cells to PMA without compromising the viability of live cells. The lysostaphin was applied to improve the effectiveness of DNA extraction...
March 28, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29575393/photodynamic-inactivation-of-foodborne-bacteria-by-eosin-y
#2
E Bonin, A R Dos Santos, A Fiori da Silva, L H Ribeiro, M E Favero, P A Z Campanerut-Sá, C F de Freitas, W Caetano, N Hioka, J M G Mikcha
AIMS: The aim of this study was evaluate the effect of photodynamic inactivation mediated by eosin Y in Salmonella enterica serotype Typhimurium ATCC 14028, Escherichia coli ATCC 25922, Pseudomonas aeruginosa ATCC 27853, Staphylococcus aureus ATCC 25923 and Bacillus cereus ATCC 11778. METHODS AND RESULTS: Bacteria (107 CFU per ml) were incubated with eosin Y at concentrations ranging from 0·1 to 10 μmol l-1 , irradiated by green LED (λmax 490-570 nm) for 5, 10 and 15 min and the cellular viability was determined...
March 25, 2018: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/29553812/chemical-composition-and-in-vitro-anticancer-antimicrobial-and-antioxidant-activities-of-essential-oil-and-methanol-extract-from-rumex-nervosus
#3
Mohammed Mansour Quradha, Rasool Khan, Mujeeb-Ur- Rehman, Abdulrahman Abohajeb
Chemical composition, antioxidant, anticancer, and antimacrobial activities of essential oil obtained from leaves of Rumex nervosus has been evaluated here for the first time. GC/MS analysis reveals the presence of Palmitoleic Acid (28.35%) and Palmitic acid, (25. 37%) as their methyl ester as major components. The essential oil showed significant DPPH radical scavenging activity (94.907 ± 0.1089% and 94.003 ± 0.0749%) at concentration (100 and 80) μg/mL respectively. The oil showed promising activity against staph aureus, while showed weak activity against (Hela and 3T3) cell lines...
March 19, 2018: Natural Product Research
https://www.readbyqxmd.com/read/29550124/the-production-characteristics-of-volatile-organic-compounds-and-their-relation-to-growth-status-of-staphylococcus-aureus-in-milk-environment
#4
J Chen, J N Tang, K L Hu, Y Y Zhao, C Tang
In our previous research, 3-methyl-butanal and 3-methyl-butanoic acid were identified as representative and specific volatile organic compounds released by Staphylococcus aureus in broth. In this study, we explored the production of the 2 volatiles and their correlation to Staph. aureus growth in milk under different conditions. We found significant correlations between the production of 3-methyl-butanoic acid and cell counts of 5 Staph. aureus strains in sterile milk, and there were no obvious differences for its production among 5 tested strains...
March 14, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29548037/marine-develops-chronic-right-knee-granuloma-after-initial-injury-at-the-basic-school
#5
Amarateedha H Prak, Kristina M Dela Rosa
With skin lesions that have failed previous treatments, consideration for an atypical mycobacteria, specifically Mycobacterium marinum, infection should be suspected. Importance of the history cannot be stressed as this is a clue that the patient may have been inoculated and infected in the field environment. A marine with chronic right knee plaque for 3 yr that first appeared after a field exercise at The Basic School but worsened despite treatment with clindamycin, TMP-SMX, and incision and drainage in 2012...
March 14, 2018: Military Medicine
https://www.readbyqxmd.com/read/29518093/selection-and-characterization-of-probiotic-lactic-acid-bacteria-and-its-impact-on-growth-nutrient-digestibility-health-and-antioxidant-status-in-weaned-piglets
#6
Runjun Dowarah, Ashok Kumar Verma, Neeta Agarwal, Putan Singh, Bhoj Raj Singh
The present study was aimed to develop an effective probiotic lactic acid bacteria (LAB) from piglet feces and in vitro characterization of probiotic properties. To confirm host-species specificity of probiotics, the efficacy of isolated LAB on growth, nutrient utilization, health and antioxidant status was observed in early weaned piglets. A total of 30 LAB were isolated from feces of five healthy piglets (28d old). All isolates were Gram positive, cocco-bacilli and catalase negative. Out of thirty LAB isolates, twenty were shortlisted on the basis of their tolerance to pH (3...
2018: PloS One
https://www.readbyqxmd.com/read/29514423/identification-and-study-of-the-behavior-of-s-aureus-and-s-epidermidis-in-fresh-and-frozen-strawberries
#7
Izabela Steinka, Anita Kukułowicz
BACKGROUND: Methicillin-Resistant Staphylococcus aureus (MRSA), which is resistant to many antibiotics, creates a serious problem for human health if present in food. This study aimed to assess the quality of commercially-available fresh and frozen strawberries and to compare the behavior of staphylococci in these fruits as affected by the temperature of freezing. METHODS: The research material included different species of fresh strawberries and strawberries frozen with the fluidization method to –40°C and packaged in an industrial environment...
January 2018: Acta Scientiarum Polonorum. Technologia Alimentaria
https://www.readbyqxmd.com/read/29456942/bacterial-biofilms-in-chronic-rhinosinusitis-and-their-implications-for-clinical-management
#8
Abhilasha Karunasagar, Santosh S Garag, Suma B Appannavar, Raghavendra D Kulkarni, Ashok S Naik
To study the microbiological profile in patients with chronic rhino-sinusitis. To correlate disease severity with the presence of biofilms and host risk factors. To assess outcome of Sinus Surgery 2 weeks post operatively in terms of presence of bacteria and their ability to form biofilm. Prospective study. 50 cases of chronic rhino-sinusitis requiring Functional Endoscopic Sinus Surgery admitted in SDM Hospital, Dharwad, Karnataka were studied using intra-operative mucosal samples for microbiological analysis...
March 2018: Indian Journal of Otolaryngology and Head and Neck Surgery
https://www.readbyqxmd.com/read/29449095/relationships-between-bacteriospermia-dna-integrity-nuclear-protamine-alteration-sperm-quality-and-icsi-outcome
#9
Ali Zeyad, Mohammed Hamad, Houda Amor, Mohamad Eid Hammadeh
The Aim of this study was to evaluate the effects of bacteriospermia on human sperm parameters, nuclear protamines, DNA integrity and ICSI outcome in patients enrolled for ICSI treatment. 84 unselected couples consulting in infertility and obstetrics clinic and enrolled for ICSI treatment were included in this study. The semen specimens were screened bacteriologically; semen and sperm parameters were also evaluated according to WHO guidelines. DNA integrity, protamines concentration and protamine deficiency were estimated by TUNEL assay, AU-PAGE and Chromomycin (CMA3) respectively...
February 12, 2018: Reproductive Biology
https://www.readbyqxmd.com/read/29408029/characterization-of-a-genetically-distinct-subpopulation-of-staphylococcus-haemolyticus-isolated-from-milk-of-cows-with-intramammary-infections
#10
Anna Wanecka, Jarosław Król, Jan Twardoń, Jacek Mrowiec, Jacek Bania, Agnieszka Korzeniowska-Kowal, Anna Tobiasz
The aim of this paper is to describe a novel subpopulation of Staphylococcus haemolyticus isolated from intramammary gland infections (IMI) in cattle. In total, eight isolates originating from milk samples from two unrelated dairy farms were examined phenotypically (using the ID 32 STAPH system) and genotypically. These isolates had almost identical sequences of each of the housekeeping genes examined (dnaJ, rpoB and sodA) but these sequences displayed similarity of only ∼92.5%, 95.0% and 96.8%, respectively, with known S...
February 2018: Veterinary Microbiology
https://www.readbyqxmd.com/read/29399552/combined-activity-of-colloid-nanosilver-and-zataria-multi%C3%AF-ora-boiss-essential-oil-mechanism-of-action-and-biofilm-removal-activity
#11
Maryam Shirdel, Hossein Tajik, Mehran Moradi
Purpose: The aim of this study was to investigate antimicrobial and biofilm removal potential of Zataria multiflora essential oil (ZEO) and silver nanoparticle (SNP) alone and in combination on Staphylococcus aureus and Salmonella Typhimurium and evaluate the mechanism of action. Methods: The minimum inhibitory concentration (MIC), and optimal inhibitory combination (OIC) of ZEO and SNP were determined according to fractional inhibitory concentration (FIC) method. Biofilm removal potential and leakage pattern of 260-nm absorbing material from the bacterial cell during exposure to the compounds were also investigated...
December 2017: Advanced Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/29398026/antimicrobial-consumption-on-dairy-herds-and-its-association-with-antimicrobial-inhibition-zone-diameters-of-non-aureus-staphylococci-and-staphylococcus-aureus-isolated-from-subclinical-mastitis
#12
M Stevens, S Piepers, K Supré, S De Vliegher
The main objectives of this study were to quantify the consumption of antimicrobials on a convenience sample of dairy herds and to determine the association between herd-level antimicrobial consumption and inhibition zone diameters (IZD) of non-aureus staphylococci and Staphylococcus aureus isolates from subclinical mastitis cases. Also, the association between the IZD of non-aureus staphylococci and Staph. aureus isolates within a herd was studied. Antimicrobial consumption data on 56 Flemish dairy farms were obtained between 2013 and 2014 by so-called garbage can audits and expressed as antimicrobial treatment incidence (ATI), with the unit of ATI being the number of defined daily doses animal (DDDA) used per 1,000 cow-days...
February 2, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29397175/short-communication-characterization-of-staphylococcus-aureus-isolated-along-the-raw-milk-cheese-production-process-in-artisan-dairies-in-italy
#13
S Johler, G Macori, A Bellio, P L Acutis, S Gallina, L Decastelli
Staphylococcus aureus is a common cause of food-borne intoxications. Several staphylococcal food poisoning outbreaks have been linked to consumption of raw milk cheeses and artisanal cheese production. However, information on Staph. aureus isolated from artisanal raw milk cheeses and small-scale dairy production environments is very limited. Therefore, we aimed to characterize Staph. aureus isolated along the artisanal raw milk production chain by determining (1) the population structure, and (2) the presence/absence of enterotoxin genes, mecA/C, and pvl...
January 31, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29395146/short-communication-methicillin-resistant-staphylococcus-aureus-in-conventional-and-organic-dairy-herds-in-germany
#14
Bernd-Alois Tenhagen, Katja Alt, Beatrice Pfefferkorn, Lars Wiehle, Annemarie Käsbohrer, Alexandra Fetsch
Methicillin-resistant Staphylococcus aureus (MRSA) have been described repeatedly in dairy herds. In this study, we compared the prevalence and antimicrobial resistance of MRSA in bulk tank milk from conventional and organic dairy herds in Germany. Samples were collected from 372 conventional and 303 organic dairy herds throughout Germany. Bulk tank milk (25 mL) was tested for MRSA using an established double selective enrichment method. The MRSA isolates were typed using spa typing and tested for resistance to 19 antimicrobials using the broth microdilution method...
January 29, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29364698/prevalence-and-characterization-of-staphylococcus-aureus-strains-in-the-pork-chain-supply-in-chile
#15
Valeria Velasco, José L Vergara, Ana M Bonilla, Javier Muñoz, Alejandra Mallea, Diego Vallejos, Mario Quezada-Aguiluz, Jorge Campos, Pedro Rojas-García
The detection of methicillin-resistant Staphylococcus aureus (MRSA) and other emerging strains in meat-producing animals and retail meat has increased the risk of contamination of food. The aim of this study was to determine the prevalence and characterize S. aureus strains isolated from the pork chain supply in Chile. A total of 487 samples were collected: 332 samples from pigs at farms and slaughterhouses (nasal, n = 155; skin, n = 177); 85 samples from carcasses at slaughterhouses; and 70 meat samples at supermarkets and retail stores...
January 24, 2018: Foodborne Pathogens and Disease
https://www.readbyqxmd.com/read/29331467/canadian-national-dairy-study-herd-level-milk-quality
#16
C A Bauman, H W Barkema, J Dubuc, G P Keefe, D F Kelton
The objective of this study was to estimate Canadian national milk quality parameters and estimate the bulk tank milk (BTM) prevalence of 4 mastitis pathogens, Staphylococcus aureus, Streptococcus agalactiae, Mycoplasma bovis, and Prototheca spp., on Canadian dairy farms. A questionnaire was sent to all Canadian dairy producers. Of the 1,062 producers who completed the questionnaire, 374 producers from across the country were visited and milking hygiene was assessed. Farm-level milk quality data for all Canadian dairy producers was collected from the provincial marketing boards and combined with the questionnaire and farm visit data...
March 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29325865/emerging-discrepancies-in-conventional-and-molecular-epidemiology-of-methicillin-resistant-staphylococcus-aureus-isolated-from-bovine-milk
#17
Amjad Islam Aqib, Muhammad Ijaz, Shahid Hussain Farooqi, Rais Ahmed, Muhammad Shoaib, Muhammad Muddassir Ali, Khalid Mehmood, Hui Zhang
Methicillin resistant Staphylococcus aureus (MRSA) is an emerging public health concern from dairy milk, and its diagnosis by phenotypic methodology is experiencing higher discrepancies. The present study was planned to estimate discrepancies in phenotypic identification of MRSA and MSSA (Methicillin sensitive Staphylococcus aureus) in relation to mecA, and prevalent risk factors from various localities. In-vitro oxacilline antibiotic disks were used for phenotypic identification of MRSA, whereas mecA gene was used as MRSA marker in Staph aureus by PCR...
March 2018: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29318401/synthesis-anti-microbial-activity-cytotoxicity-of-some-novel-substituted-5-3-1h-benzo-d-imidazol-2-yl-4-hydroxybenzyl-benzofuran-2-yl-phenyl-methanone-analogs
#18
Bhookya Shankar, Pochampally Jalapathi, Balabadra Saikrishna, Shaym Perugu, Vijjulatha Manga
BACKGROUND: There is a dire need for the discovery and development of new antimicrobial agents after several experiments for a better resistance of microorganisms towards antimicrobial agents become a serious health problem for a few years in the past. As benzimidazole possess various types of biological activities, it has been synthesized, in the present study, a new series of (5-(3-(1H-benzo[d]imidazol-2-yl)-4-hydroxybenzyl)benzofuran-2-yl)(phenyl)methanone analogs by using the condensation and screened for its in vitro antimicrobial activity and cytotoxicity...
January 9, 2018: Chemistry Central 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
#19
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...
February 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29187146/determination-of-antimicrobial-susceptibility-patterns-in-staphylococcus-aureus-strains-recovered-from-patients-at-two-main-health-facilities-in-kabul-afghanistan
#20
Haji Mohammad Naimi, Hamidullah Rasekh, Ahmad Zia Noori, Mohammad Aman Bahaduri
BACKGROUND: Staphylococcus aureus (S. aureus) is a major pathogen implicated in skin and soft tissue infections, abscess in deep organs, toxin mediated diseases, respiratory tract infections, urinary tract infections, post-surgical wound infections, meningitis and many other diseases. Irresponsible and over use of antibiotics has led to an increased presence of multidrug resistant organisms and especially methicillin resistant Staphylococcus aureus (MRSA) as a major public health concern in Afghanistan...
November 29, 2017: BMC Infectious Diseases
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