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Urease test

Tsung-Hsing Chen, Chen-Ming Hsu, Hao-Tsai Cheng, Yin-Yi Chu, Ming-Yao Su, Jun-Te Hsu, Ta-Sen Yeh, Chang-Fu Kuo, Cheng-Tang Chiu
BACKGROUND: Esophagogastroduodenoscopy (EGD) is a standard tool for detection of mucosal and submucosal lesions. However, identification of Helicobacter pylori (H. P) infection using EGD alone is limited in accuracy. Linked color imaging (LCI) is a novel tool to capture real-time image with sufficient contrast to observe mucosal microstructure. METHODS: This study aims to evaluate the applicability of LCI in the identification of H. pylori infection. Consecutive 122 patients scheduled for EGD were included...
May 16, 2018: Journal of the Chinese Medical Association: JCMA
Gunnar Dahlén, Haidar Hassan, Susanne Blomqvist, Anette Carlén
BACKGROUND: Urease is an enzyme produced by plaque bacteria hydrolysing urea from saliva and gingival exudate into ammonia in order to regulate the pH in the dental biofilm. The aim of this study was to assess the urease activity among oral bacterial species by using the rapid urease test (RUT) in a micro-plate format and to examine whether this test could be used for measuring the urease activity in site-specific supragingival dental plaque samples ex vivo. METHODS: The RUT test is based on 2% urea in peptone broth solution and with phenol red at pH 6...
May 18, 2018: BMC Oral Health
Irigrácin Lima Diniz Basílio, Maria de Fátima Celino Catão, Janilson Dantas de Sousa Carvalho, Francisco Paulo Freire-Neto, Leonardo Capristano Ferreira, Selma Maria Bezerra Jerônimo
INTRODUCTION: Helicobacter pylori, a water contaminant, is the primary pathogenic agent associated with gastric diseases in humans. Exposure to H. pylori is more likely higher in developing countries. This study aimed to evaluate the risk factors associated with H. pylori infection in patients undergoing endoscopy to validate the cause of dyspeptic symptoms in an urban population in northeast Brazil and to compare the urease test and polymerase chain reaction assay results with the histopathological findings...
March 2018: Revista da Sociedade Brasileira de Medicina Tropical
Robert Pawłowicz, Krzysztof Wytrychowski, Bernard Panaszek
Introduction: The infectious factor like Helicobacter pylori (HP) has been thought to trigger the vicious circle of chronic idiopathic urticaria (CIU), therefore its eradication could modify the course of the disease. Aim: To reveal the influence of HP eradication on CIU clinical course. Material and methods: Sixty-four CIU patients, receiving fexofenadine, as the basic treatment, took part in the research, divided into 3 groups: HP patients treated by eradication, HP patients receiving placebo, and patients without bacteria...
April 2018: Postȩpy Dermatologii i Alergologii
Yuliet Liliana Rosero Lasso, Betsy Verónica Arévalo-Jaimes, María de Pilar Delgado, José Fernando Vera-Chamorro, Daniella García, Andrea Ramírez, Paula A Rodríguez-Urrego, Johanna Álvarez, Carlos Alberto Jaramillo
OBJECTIVES: To determine the current prevalence of Helicobacter pylori in symptomatic Colombian children and evaluate the presence of mutations associated with clarithromycin resistance. PATIENTS AND METHODS: Biopsies from 133 children were analyzed. The gastric fragment was used for urease test and reused for PCR-sequencing of the 23SrDNA gene. Mutations were detected by bioinformatic analysis. RESULTS: PCR-sequencing established that H. pylori infection was present in 47% of patients...
April 27, 2018: Journal of Pediatric Gastroenterology and Nutrition
Lijun Xi, Nenghu Qiao, Dejian Liu, Jing Li, Jingjing Zhang, Jianguo Liu
Two bacterial strains were isolated from coal mine water in China. Isolates were facultatively anaerobic, Gram-stain-negative, rod-shaped, motile by means of a single polar flagellum, and they did not produce bacteriochlorophyll α. Cells grew in tryptic soy broth with 0-5.5 % (w/v) NaCl, at 4-55 °C and pH 3.5-10.5. Isolates were positive for catalase, oxidase, urease, Voges-Proskauer test, gelatin hydrolysis and H2S production. Analysis of 16S rRNA gene sequences indicated that the closest relatives of strains Q4...
April 25, 2018: International Journal of Systematic and Evolutionary Microbiology
Kyu Ho Kang, Su Hyun Hwang, Dongwoo Kim, Dae Ha Kim, Seung Young Kim, Jong Jin Hyun, Sung Woo Jung, Ja Seol Koo, Young Kul Jung, Hyung Joon Yim, Sang Woo Lee
Background/Aims: Several previous studies suggest that eradication of Helicobacter pylori ( H. pylori ) leads to the disappearance of gastric hyperplastic polyps. However, little is known about the effect of H. pylori status and eradication on the recurrence of gastric polyps after endoscopic removal. Here, we investigated the recurrence of gastric polyps according to the final H. pylori status in patients who underwent endoscopic removal of gastric hyperplastic polyps. Methods: Between January 2011 and December 2016, patients who underwent endoscopic removal of gastric hyperplastic polyps and were followed-up for more than two months were enrolled...
April 25, 2018: Korean Journal of Gastroenterology, Taehan Sohwagi Hakhoe Chi
Myreisa Morales-Cruz, Marjorie López-Nieves, Roberto Morales-Hernández, Gian C Rivera-Crespo, Gary A Toranzos, Ileana González-González, Carlos R Cabrera
One of the most challenging problems when trying to recycle urine for different purposes is the removal of urea. In this project we studied an ureolysis system using the bacterium Proteus vulgaris for the transformation of urea to ammonia and its subsequent oxidation to nitrogen at a Pt working electrode. Our system was tested under different pH, microbial reaction times, and urea and bacteria concentrations. Our results indicate that a pH8 is optimal for the combined Proteus vulgaris urease activity and the ammonia oxidation reaction at a Pt electrode...
April 4, 2018: Bioelectrochemistry
Jing Yu, Hui Ye, Jiang Li, Ning Li, Zong-Ming Shi, Xue-Zhi Zhang
Mass Galla chinesis et camelliae Fermentata ( Chinese gall leaven , CGL) was investigated for activities against Helicobacter pylori (H. pylori) both in vitro and in vivo . The agar dilution method and time-kill curves, as in vitro assays and an in vivo study using a Kunming mice model, were performed. CGL demonstrated a strong anti- Helicobacter pylori activity in vitro with the minimal inhibitory concentrations (MICs) against multiple H. pylori strains of 0.5~8 mg/ml and the decreasing trend time-kill curves when increasing CGL concentrations...
2018: Evidence-based Complementary and Alternative Medicine: ECAM
Philippe Lehours
Helicobacter pylori colonizes the stomach of half of humanity. The prevalence of this infection is higher among people of low socioeconomic status and from developing countries. In the absence of effective antibiotic treatment, the infection persists decades or even lifetime. The diagnosis of H. pylori can be made by invasive methods when biopsies are obtained: culture, histological examination, polymerase chain reaction or rapid urease test. Non-invasive methods have been developed, including the urea breath test, a test of high reliability, particularly suitable for post treatment monitoring, but also the fecal antigen test, as well as the detection of antibodies in the serum...
April 12, 2018: Minerva Gastroenterologica e Dietologica
Vijaya Bharathi Srinivasan, Govindan Rajamohan
In this study, we present the genome sequence of Serratia marcescens SM03, recovered from a human gut in India. The final assembly consists of 26 scaffolds (4620 coding DNA sequences, 5.08 Mb, 59.6% G + C ratio) and 79 tRNA genes. Analysis identified novel genes associated with lactose utilization, virulence, P-loop GTPases involved in urease production, CFA/I fimbriae apparatus and Yersinia - type CRISPR proteins. Antibiotic susceptibility testing indicated drug tolerant phenotype and inhibition assays demonstrated involvement of extrusion in resistance...
April 5, 2018: Genomics
Emy Koestanti S, Wiwik Misaco, Sri Chusniati, Lilik Maslachah
Background: Brucellosis in pigs at East Java Indonesia has not only cause great economic losses due to a decrease in productivity of livestock but also are zoonotic. Infection on free brucelosis pigs were initially begun with the infected pigs both male and female, or the use of superior male pigs together. The elimination of the disease either on a group or population is considered as the most effective way to prevent the spread of the disease in pigs. Prevention efforts mainly addressed to vaccination, sanitary maintenace and government policy...
2018: African Journal of Infectious Diseases
Ping-I Hsu, Feng-Woei Tsay, David Y Graham, Tzung-Jiun Tsai, Kuo-Wang Tsai, John Y Kao, Nan-Jing Peng, Chao-Hung Kuo, Sung-Shuo Kao, Huay-Min Wang, Te-Fu Lin, Deng-Chyang Wu
BACKGROUND & AIMS: Bismuth quadruple therapy is recommended as a first-line treatment for Helicobacter pylori infection in the United States but hybrid therapy is an alternative option. Reverse hybrid therapy (proton pump inhibitor plus amoxicillin for 14 days, and clarithromycin plus metronidazole for the initial 7 days) is a simplified hybrid treatment. We aimed to assess the efficacies of reverse hybrid therapy vs bismuth quadruple therapy as first-line treatments for patients with H pylori infection in a randomized trial...
March 30, 2018: Clinical Gastroenterology and Hepatology
Weslley de Paiva-Santos, Viviane Santos de Sousa, Marcia Giambiagi-deMarval
Staphylococcus saprophyticus is an important pathogen responsible for community urinary tract infections (UTI). Besides composing the human microbiota, this species is widely distributed in the environment and the origins of this organism for human infection is not fully characterized. Although some virulence determinants are known, such as d-serine deaminase (DsdA), urease and cell-wall associated proteins, few studies investigated the distribution of virulence-associated genes and analyzed the pathogenic potential of S...
March 28, 2018: Microbial Pathogenesis
María R Baroni, Pamela Bucci, Rita N Giani, Antonela Giusti, Fabian A Tedeschi, Emiliano Salvatierra, Yanina Barbaglia, Félix Jimenez, Fabian E Zalazar
Helicobacter pylori is a gastric pathogen that is widely recognized as a causative agent of gastric disease. Its eradication is variable, mainly due to increased resistance to clarithromycin. Our objective was: to evaluate (i) if the biopsy specimen used for the rapid urease test is a useful sample to detect resistance to clarithromycin by PCR-RFLP and (ii) the distribution of A2142G and A2143G point mutations in the 23S rRNA gene, in relation to virulence factors in our region. Gastric specimens were collected from adult dyspeptic patients (n=141) and H...
March 27, 2018: Revista Argentina de Microbiología
Mustafa Abdullah Yilmaz, Abdulselam Ertas, Ismail Yener, Mehmet Akdeniz, Oguz Cakir, Muhammed Altun, Ibrahim Demirtas, Mehmet Boga, Hamdi Temel
The current study aims to optimize and validate a comprehensive LC-MS/MS method for the quantification of 37 phytochemicals (15 phenolic acids, 17 flavonoids, 3 non-phenolic organic acids, 1 phenolic aldehyde and 1 benzopyrene) in Achillea species. Though Achillea species were chosen as real life samples, the current method is applicable to a wide range of plant species. The developed method was fully validated in terms of linearity, accuracy (recovery), inter-day and intra-day precision (repeatability), limits of detection and quantification (LOD/LOQ) and relative standard uncertainty (U% at 95% confidence level (k = 2))...
March 10, 2018: Journal of Pharmaceutical and Biomedical Analysis
Hyunsung Park, Jae Jun Park, Yoo Mi Park, Su Jung Baik, Hyun Ju Lee, Da Hyun Jung, Jie-Hyun Kim, Young Hoon Youn, Hyojin Park
BACKGROUND: The association between Helicobacter pylori infection and advanced colorectal neoplasia (ACN) remains controversial. This study aimed to clarify the association between H. pylori infection and ACN according to age groups. METHODS: We retrospectively analyzed the association between H. pylori infection and ACN in patients aged <50 and ≥50 years receiving a health checkup that included colonoscopy. Helicobacter pylori positivity was determined by the results of serum anti-H...
March 29, 2018: Helicobacter
Bogdan Bucur, Florentina-Daniela Munteanu, Jean-Louis Marty, Alina Vasilescu
The intensive use of toxic and remanent pesticides in agriculture has prompted research into novel performant, yet cost-effective and fast analytical tools to control the pesticide residue levels in the environment and food. In this context, biosensors based on enzyme inhibition have been proposed as adequate analytical devices with the added advantage of using the toxicity of pesticides for detection purposes, being more "biologically relevant" than standard chromatographic methods. This review proposes an overview of recent advances in the development of biosensors exploiting the inhibition of cholinesterases, photosynthetic system II, alkaline phosphatase, cytochrome P450A1, peroxidase, tyrosinase, laccase, urease, and aldehyde dehydrogenase...
March 22, 2018: Biosensors
Humayun Pervez, Nazia Khan, Jamshed Iqbal, Sumera Zaib, Muhammad Yaqub, Muhammad Moazzam Naseer
A series of fifteen N4-benzyl substituted 5-chloroisatin-3-thiosemicarbazones 5a-o were synthesized and screened mainly for their antiurease and antiglycation effects. Lemna aequinocitalis growth and Artemia salina assays were carried out to determine their phytotoxicity and cytotoxicity potential. All the compounds proved to be extremely effective urease inhibitors, demonstrating enzyme inhibition much better than the reference inhibitor, thiourea (IC50 values 1.31 ± 0.06 to 3.24 ± 0.15 vs. 22.3 ± 1.12 μM)...
March 2018: Acta Chimica Slovenica
Mindy Elizabeth Hair, Adrianna I Mathis, Erica K Brunelle, Lenka Halámková, Jan Halámek
Sweat is a biological fluid present on the skin surface of every individual and is known to contain amino acids as well as other low molecular weight compounds. Each individual is inherently different from one another based on certain factors including, but not limited to, his/her genetic make-up, environment, and lifestyle. As such, the biochemical composition of each person greatly differs. The concentrations of the biochemical content within an individual's sweat are largely controlled by metabolic processes within the body that fluctuate regularly based on attributes such as age, gender, and activity levels...
March 21, 2018: Analytical Chemistry
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