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Cultured beef

Sidharath D Thakur, Jo-Anne R Dillon
Neisseria gonorrhoeae isolates were grown on chocolate agar slants comprising GC Agar Medium Base supplemented with 1% modified Kellogg's supplement and 1% beef blood hemoglobin. The bacterial growth was covered with sterilized paraffin oil. Cultures were used for transportation and storage of Neisseria gonorrhoeae for 3months at room temperature.
November 15, 2017: Journal of Microbiological Methods
Diana Ayala, Kendra Nightingale, Claudia Narvaez-Bravo, Mindy M Brashears
Nontyphoid Salmonella strains are some of the leading causes of foodborne illnesses worldwide; however, there is very limited information on the presence and characteristics of Salmonella in the food production chain in developing countries. In this study, pulsed-field gel electrophoresis (PFGE) was used for molecular subtyping and for monitoring the ecology and transmission of Salmonella isolates in a slaughter facility in Mexico in an attempt to determine specific steps that need to be improved to reduce Salmonella contamination in beef carcasses...
December 2017: Journal of Food Protection
Eugène Niyonzima, Martin Patrick Ongol, Yves Brostaux, Nicolas Korsak, Georges Daube, Anastase Kimonyo, Marianne Sindic
Meat constitutes one of the major vehicles for human foodborne infections. This study aimed to assess the retail conditions and to determine the microbiological quality and safety of meat retailed within the establishments of Kigali (Rwanda). A questionnaire survey was carried out in 150 retail outlets to characterise meat retail conditions. Additionally, 270 retail meat samples were analysed for the enumeration of hygiene indicator bacteria (total mesophilic bacteria and Escherichia coli) and for the qualitative detection of Salmonella, using conventional culture methods...
November 8, 2017: Tropical Animal Health and Production
M D Weinroth, C R Carlson, J N Martin, J L Metcalf, P S Morley, K E Belk
Liver abscesses are a major economic burden to beef producers. Although a few causative organisms have been cultured from purulent material, the full polymicrobial diversity of liver abscesses has not been reported. The objective of this study was to characterize purulent material collected from liver abscess in beef cattle produced in different production systems in 3 cattle producing states in the United States using 16S rRNA gene sequencing. Differences between purulent material microbial communities among geographic region of feeding and application of a common antimicrobial were also investigated...
October 2017: Journal of Animal Science
P Tríbulo, B H Bernal Ballesteros, A Ruiz, A Tríbulo, R J Tríbulo, H E Tríbulo, G A Bo, P J Hansen
Embryokines are molecules secreted by the mother that regulate embryonic development. Among these molecules in cattle are colony stimulating factor 2 (CSF2) and dickkopf-related protein 1 (DKK1). Here, we evaluated actions of CSF2 and DKK1 alone or in combination on characteristics of embryos produced in vitro in the presence of serum. A total of 70 beef cows from 4 farms were subjected to oocyte retrieval on 1 to 4 occasions. Within each farm, donors were randomly allocated to 1 of 4 treatment groups (vehicle, CSF2, DKK1, CSF2 + DKK1)...
October 2017: Journal of Animal Science
Mark Granick, Liel Rubinsky, Chaitra Parthiban, Mayilvahanan Shanmugam, Narayanan Ramasubbu
INTRODUCTION: Surgical instrumentation is now available to facilitate wound debridement. The 2 primary options involve different energy applications, but both have the potential to spray. The Versajet II (Smith & Nephew, London, UK) utilizes a high-powered water jet to disrupt tissue and remove debris by means of the Venturi effect. The SonicVac (Misonix, Farmingdale, NY) is a direct-contact, low-frequency ultrasound debriding device. It delivers a high-energy ultrasound to a wound surface via a fluid medium, causing bubble cavitation, a physical effect of rapid pressure waves causing bubbles to form and implode that releases mechanical energy...
October 2017: Wounds: a Compendium of Clinical Research and Practice
Yimin Zhang, Lixian Zhu, Pengcheng Dong, Rongrong Liang, Yanwei Mao, Shubing Qiu, Xin Luo
Objective: This study was to determine the bacterial diversity and monitor the community dynamic changes during storage of vacuum-packaged sliced raw beef as affected by Lactobacillus sakei and Lactobacillus curvatus. Methods: L. sakei and L. curvatus were separately incubated in vacuumed-packaged raw beef as bio-protective cultures to inhibit the naturally contaminating microbial load. Dynamic changes of the microbial diversity of inoculated or non-inoculated (control) samples were monitored at 4 °C for 0 to 38 days, using polymerase chain reaction-denaturing gradient gel electrophoresis (PCR-DGGE)...
October 20, 2017: Asian-Australasian Journal of Animal Sciences
Yutthapong Sangnoi, Sunipa Chankaew, Sompong O-Thong
BACKGROUND AND OBJECTIVE: Toxic nitrogen compounds are one cause decreasing of shrimp production and water pollution. Indigenous Halomonas spp., isolated from Pacific white shrimp farm are benefitted for saline ammonium waste water treatment. This study aimed to isolate the heterotrophic-halophilic Halomonas spp. and investigate their ammonium removal efficiency. MATERIALS AND METHODS: Halomonas spp., were isolated by culturing of samples collected from shrimp farm into modified Pep-Beef-AOM medium...
2017: Pakistan Journal of Biological Sciences: PJBS
Zachary R Stromberg, Gentry L Lewis, Liesel G Schneider, Galen E Erickson, Isha R Patel, David R Smith, Rodney A Moxley
Enterohemorrhagic Escherichia coli (EHEC) strains are foodborne pathogens carried in the intestinal tracts of ruminants and shed in the feces. High concentrations (≥10(4) colony-forming units [CFU]/g) of EHEC in cattle feces are associated with contamination of hides, and subsequently, carcasses and beef. Several studies using agar media have quantified O157 but few have quantified non-O157 EHEC in samples from cattle. Thus, the objective of this study was to determine the concentration of O157 and non-O157 EHEC in cattle, and to characterize the associated EHEC isolates for their virulence potential...
October 12, 2017: Foodborne Pathogens and Disease
C Gortázar, L M Fernández-Calle, J A Collazos-Martínez, O Mínguez-González, P Acevedo
Animal tuberculosis (TB), which is caused by infection with members of the Mycobacterium tuberculosis complex (MTC), is a typical multi-host infection that flourishes at the livestock-wildlife interface. TB epidemiology is well characterized in the Mediterranean woodland habitats and Atlantic regions of southwestern Europe. However, much less is known about huge regions that do not form part of the two abovementioned settings, which have a low abundance of wild reservoirs. We hypothesized that MTC would be maintained in multi- rather than single-host communities in which wildlife would make a relatively low contribution to the maintenance of TB...
October 1, 2017: Preventive Veterinary Medicine
D F Mollenkopf, D A Mathys, D A Dargatz, M M Erdman, G G Habing, J B Daniels, T E Wittum
In the US, nontyphoidal Salmonellae are a common foodborne zoonotic pathogen causing gastroenteritis. Invasive Salmonella infections caused by extended-spectrum cephalosporin resistant (ESCR) phenotypes are more likely to result in treatment failure and adverse health outcomes, especially in severe pediatric Salmonella infections where the extended-spectrum β-lactams are the therapy of choice. To examine the genetic and epidemiologic characteristics of ESCR Salmonellae which may enter the food chain, we characterized 44 ceftiofur-resistant Salmonella isolates from the National Animal Health Monitoring System (NAHMS) 2011 beef cattle feedlot health and management study...
October 1, 2017: Preventive Veterinary Medicine
Giuseppe Blaiotta, Nicoletta Murru, Alessandro Di Cerbo, Raffaele Romano, Maria Aponte
BACKGROUND: Five probiotic lactobacilli were tested, alone or in combination with two commercial starters, to select the most suitable strain for a probiotic bovine salami production. Lactobacillus plantarum 299v was used with both starters, to make salami according to a traditional recipe. Salami obtained by using just the starters and by spontaneous fermentation, served as control. Microbial dynamics, as well as the main physico-chemical parameters, were monitored throughout ripening...
October 9, 2017: Journal of the Science of Food and Agriculture
Chijioke O Elekwachi, Zuo Wang, Xiaofeng Wu, Alaa Rabee, Robert J Forster
Advances in high throughput, next generation sequencing technologies have allowed an in-depth examination of biological environments and phenomena, and are particularly useful for culture-independent microbial community studies. Recently the use of RNA for metatranscriptomic studies has been used to elucidate the role of active microbes in the environment. Extraction of RNA of appropriate quality is critical in these experiments and TRIzol reagent is often used for maintaining stability of RNA molecules during extraction...
2017: Frontiers in Microbiology
Nathan E N Erickson, Emily Lanigan, Taryn Waugh, Karen Gesy, Cheryl Waldner
A blinded randomized controlled trial was used to evaluate a multi-modal therapeutic regime for treatment of beef bulls infected with Campylobacter fetus subsp. venerealis (Cfv). Treatment included 2 doses of a commercially available monovalent vaccine and long-acting oxytetracycline applied twice at a 2-week interval with treatment completed 2 weeks before post-treatment observation. Fifteen confirmed Cfv infected bulls were randomly allocated to control (n = 8) or treatment groups (n = 7). Preputial scrapings were collected each week from before infection to 11 weeks following the last treatment...
October 2017: Canadian Veterinary Journal. la Revue Vétérinaire Canadienne
Lan Liu, Jian-Yu Jiao, Nimaichand Salam, En-Min Zhou, Bao-Zhu Fang, Wen-Dong Xian, Meng-Meng Li, Yi-Ping Ding, Wen-Jun Li
A novel Gram-stain-positive, obligately anaerobic and thermophilic bacterium, strain SYSU GA15001T, was isolated from a sample collected from a hot spring located in Tengchong, China. Phylogenetic analysis based on the 16S rRNA gene sequence indicated that strain SYSU GA15001T belonged to the family Eubacteriaceae, and was closely related to 'Irregularibacter muris' 2PG-426-CC4.2T (93.6 % similarity), Garciella nitratireducens DSM 15102T (93.2 %) and Alkalibacter saccharofermentans Z-78920T (89.7 %). Cells were rods and motile by means of a subpolar flagellum...
September 25, 2017: International Journal of Systematic and Evolutionary Microbiology
J Visvalingam, T C Ells, X Yang
AIMS: To examine the influence of meat plant Escherichia coli and Salmonella sp. isolates on E. coli O157 biofilm formation. METHODS AND RESULTS: Biofilm formation was quantified by crystal violet staining (A570 nm ) and viable cell numbers for up to 6 days at 15°C. All five persistent E. coli genotypes formed strong biofilms when cultured alone or co-cultured with E. coli O157, with A570 nm values reaching ≥4·8 at day 4, while only two of five nonpersistent genotypes formed such biofilms...
September 25, 2017: Journal of Applied Microbiology
C Latha, C J Anu, V J Ajaykumar, B Sunil
AIM: The objective of the study was to investigate the occurrence of Listeria monocytogenes, Yersinia enterocolitica, Staphylococcusaureus, and Salmonella enterica Typhimurium in meat and meat products using the multiplex polymerase chain reaction (PCR) method. MATERIALS AND METHODS: The assay combined an enrichment step in tryptic soy broth with yeast extract formulated for the simultaneous growth of target pathogens, DNA isolation and multiplex PCR. A total of 1134 samples including beef (n=349), chicken (n=325), pork (n=310), chevon (n=50), and meat products (n=100) were collected from different parts of Kerala, India...
August 2017: Veterinary World
Yan Zheng, Yuan Hu
Hepatitis A virus (HAV) can cause serious liver disease and even death. HAV outbreaks are associated with the consumption of raw or minimally processed produce, making it a major public health concern. Infections have occurred despite the fact that effective HAV vaccine has been available. Development of a rapid and sensitive HAV detection method is necessary for an investigation of an HAV outbreak. Detection of HAV is complicated by the lack of a reliable culture method. In addition, due to the low infectious dose of HAV, these methods must be very sensitive...
November 2017: Journal of Virological Methods
Amit Vikram, Pablo Rovira, Getahun E Agga, Terrance M Arthur, Joseph M Bosilevac, Tommy L Wheeler, Paul S Morley, Keith E Belk, John W Schmidt
The specific antimicrobial resistance (AMR) decreases that can be expected from reducing antimicrobial (AM) use in United States (US) beef production have not been defined. To address this data gap, feces were recovered from 36 lots of "raised without antibiotics" (RWA) and 36 lots of "conventional" (CONV) beef cattle. Samples (N = 719) were collected during harvest and distributed over a year. AMR was assessed by: i) culture of six AM-resistant bacteria (ARB); ii) qPCR for 10 AMR genes (ARGs); iii) an qPCR array of 84 ARGs; and iv) metagenomic sequencing...
September 8, 2017: Applied and Environmental Microbiology
K Shikha Ojha, Daniel Granato, Gaurav Rajuria, Francisco J Barba, Joseph P Kerry, Brijesh K Tiwari
The effects of ultrasound (US) frequency, addition of Lactobacillus sakei culture and drying time on key nutritional (protein, amino acids, and organic acids) and physicochemical properties (texture and colour) of cultured and uncultured beef jerky were evaluated. Cultured and uncultured jerky samples were subjected to US frequencies of 25kHz, 33kHz and 45kHz for 30min prior to marination and drying. Principal component analysis demonstrated a significant effect of beef jerky processing conditions on physicochemical properties...
January 15, 2018: Food Chemistry
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