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culture and sensitivity tests

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https://www.readbyqxmd.com/read/28645157/secretory-iga-response-against-pseudomonas-aeruginosa-in-the-upper-airways-and-the-link-with-chronic-lung-infection-in-cystic-fibrosis
#1
Renan Mauch, Claudio Rossi, Talita Aiello, José Ribeiro, Antonio Ribeiro, Niels Høiby, Carlos Levy
We assessed the diagnostic ability of an ELISA test for measurement of specific secretory IgA (sIgA) in saliva to identify Cystic Fibrosis (CF) patients with P. aeruginosa chronic lung infection and intermittent lung colonization. A total of 102 Brazilian CF patients and 53 healthy controls were included. Specific serum IgG response was used as a surrogate to distinguish CF patients according to their P. aeruginosa colonization/infection status. The rate of sIgA positivity was 87.1% in CF chronically infected patients (Median value = 181...
June 22, 2017: Pathogens and Disease
https://www.readbyqxmd.com/read/28645088/risk-based-screening-combined-with-a-pcr-based-test-for-group-b-streptococci-diminishes-the-use-of-antibiotics-in-laboring-women
#2
Mohammed R Khalil, Niels Uldbjerg, Poul B Thorsen, Birgitte Henriksen, Jens K Møller
OBJECTIVE: To assess the performance of a polymerase chain reaction - group B streptococci test (PCR-GBS test) - in deciding antibiotic prophylaxis in term laboring women. STUDY DESIGN: In this observational study, we enrolled 902 unselected Danish term pregnant women. During labor, midwives obtained vaginal swabs that were used for both GBS cultures (reference standard) and for the PCR-GBS test. Furthermore, we recorded the presence of risk factors for EOGBS (Early Onset Group B Streptococcal disease): (1) Bacteriuria during current pregnancy, (2) Prior infant with EOGBS (3) Temperature above 38...
June 9, 2017: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/28643434/improved-yield-of-minimal-proportional-sample-volume-platelet-bacterial-culture
#3
Hany Kamel, Mary Townsend, Marjorie Bravo, Ralph R Vassallo
BACKGROUND: Reports of septic transfusion reactions (STRs) after transfusion of culture-negative platelets (PLTs) justify more effective prevention strategies. Pathogen reduction technologies or performance of additional point-of-issue testing are proposed strategies to enhance safety through Day 5 of storage. STUDY DESIGN AND METHODS: Trima leukoreduced apheresis PLTs (APs) were collected during two study periods (45 and 31 months) using standard procedures, with target settings adjusted during the second period to maintain split rate after increased culture volume...
June 22, 2017: Transfusion
https://www.readbyqxmd.com/read/28642141/added-diagnostic-value-and-impact-on-antimicrobial-therapy-of-16s-rrna-pcr-and-amplicon-sequencing-on-resected-heart-valves-in-infective-endocarditis-a-prospective-cohort-study
#4
Bart Peeters, Paul Herijgers, Kurt Beuselinck, Jan Verhaegen, Willy E Peetermans, Marie-Christine Herregods, Stefanie Desmet, Katrien Lagrou
OBJECTIVES: For adequate management and therapy of infective endocarditis (IE), identification of the causative pathogen is crucial but currently molecular testing results are not included in diagnostic criteria. The added diagnostic value and impact on antimicrobial therapy of 16S rRNA PCR and Amplicon Sequencing (16S rRNA PCR) performed on excised heart valves from IE patients was evaluated alongside with the effect of pre-operative antibiotics on the performance of blood culture (BC), valve culture (VC) and 16S rRNA PCR...
June 19, 2017: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/28640908/evaluating-diagnostic-tests-for-bovine-tuberculosis-in-the-southern-part-of-germany-a-latent-class-analysis
#5
Valerie-Beau Pucken, Gabriela Knubben-Schweizer, Dörte Döpfer, Andreas Groll, Angela Hafner-Marx, Stefan Hörmansdorfer, Carola Sauter-Louis, Reinhard K Straubinger, Pia Zimmermann, Sonja Hartnack
Germany has been officially free of bovine tuberculosis since 1996. However, in the last years there has been an increase of bovine tuberculosis cases, particularly in the southern part of Germany, in the Allgäu region. As a consequence a one-time tuberculosis surveillance program was revisited with different premortal and postmortal tests. The aim of this paper was to estimate diagnostic sensitivities and specificities of the different tests used within this surveillance program. In the absence of a perfect test with 100% sensitivity and 100% specificity, thus in the absence of a gold standard, a Bayesian latent class approach with two different datasets was performed...
2017: PloS One
https://www.readbyqxmd.com/read/28640863/induced-pluripotent-stem-cell-derived-limbal-epithelial-cells-lipsc-as-a-cellular-alternative-for-in-vitro-ocular-toxicity-testing
#6
Edith Aberdam, Isabelle Petit, Linda Sangari, Daniel Aberdam
Induced pluripotent stem cells hold great potential to produce unlimited amount of differentiated cells as cellular source for regenerative medicine but also for in vitro drug screening and cytotoxicity tests. Ocular toxicity testing is mandatory to evaluate the risks of drugs and cosmetic products before their application to human patients by preventing eye irritation or insult. Since the global ban to use animals, many human-derived alternatives have been proposed, from ex-vivo enucleated postmortem cornea, primary corneal cell culture and immortalized corneal epithelial cell lines...
2017: PloS One
https://www.readbyqxmd.com/read/28638960/comparative-diagnostic-evaluation-of-omp31-gene-based-taqman%C3%A2-real-time-pcr-assay-with-visual-lamp-assay-and-indirect-elisa-for-caprine-brucellosis
#7
Suman Saini, V K Gupta, K Gururaj, D D Singh, R V S Pawaiya, N K Gangwar, A K Mishra, Deepak Dwivedi, Dimple Andani, Ashok Kumar, T K Goswami
Brucellosis is one of the leading causes of abortion in domestic animals that imposes costs on both economy and society. The disease is highly zoonotic and poses risk to animal handlers due to its zoonotic nature. It causes stillbirth, loss of kids and abortion in last term of pregnancy. Reproductive damage includes infertility in does and orchitis and epididymitis in breeding bucks, which result in high financial losses to farmers and the agriculture industry as a whole. It requires highly sensitive and specific assays to diagnose the disease at field level...
June 21, 2017: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/28638276/gastric-juice-based-real-time-pcr-for-tailored-helicobacter-pylori-treatment-a-practical-approach
#8
Xianhui Peng, Zhiqiang Song, Lihua He, Sanren Lin, Yanan Gong, Lu Sun, Fei Zhao, Yixin Gu, Yuanhai You, Liya Zhou, Jianzhong Zhang
A gastric juice-based real-time polymerase chain reaction (PCR) assay was established to identify Helicobacter pylori infection, clarithromycin susceptibility and human CYP2C19 genotypes and to guide the choice of proton pump inhibitor (PPI), clarithromycin and amoxicillin treatment for tailored H. pylori eradication therapy. From January 2013 to November 2014, 178 consecutive dyspeptic patients were enrolled for collection of gastric biopsy samples and gastric juice by endoscopy at the Peking University Third Hospital; 105 and 73 H...
2017: International Journal of Medical Sciences
https://www.readbyqxmd.com/read/28637908/rapid-filter-based-detection-and-culture-of-burkholderia-pseudomallei-from-small-volumes-of-urine
#9
Pierre A Michel, Christine Lascols, Jay E Gee, Linda M Weigel, David Sue
Clinical outcomes of melioidosis patients improve when the infecting agent, Burkholderia pseudomallei, is rapidly detected and identified by laboratory testing. Detection of B. pseudomallei DNA or recovery of the pathogen by culture from urine can support a diagnosis of melioidosis and guide patient care. Two new methods designated as Filter-Capture DNA Isolation (FCDI) and Filter Cellular Recovery (FCR) were developed to increase the sensitivity of detection and recovery of viable B. pseudomallei cells from small volumes (0...
June 21, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28637431/continuous-long-term-cytotoxicity-monitoring-in-3d-spheroids-of-beetle-luciferase-expressing-hepatocytes-by-nondestructive-bioluminescence-measurement
#10
Mayu Yasunaga, Yasuko Fujita, Rumiko Saito, Mitsuo Oshimura, Yoshihiro Nakajima
BACKGROUND: Three-dimensional (3D) spheroids are frequently used in toxicological study because their morphology and function closely resemble those of tissue. As these properties are maintained over a long term, repeated treatment of the spheroids with a test object is possible. Generally, in the repeated treatment test to assess cytotoxicity in the spheroids, ATP assay, colorimetric measurement using pigments or high-content imaging analysis is performed. However, continuous assessment of cytotoxicity in the same spheroids using the above assays or analysis is impossible because the spheroids must be disrupted or killed...
June 20, 2017: BMC Biotechnology
https://www.readbyqxmd.com/read/28636459/inhibition-of-fusarium-solani-infection-in-murine-keratocytes-by-lactobacillus-salivarius-ssp-salivarius-jcm1231-culture-filtrate-in-vitro
#11
Jianzhang Hu, Fang Chen, Tong Kan, Hua Zhuang, Jingjin Zhang, Xiaoli Han
PURPOSE: To explore the inhibitory activity of Lactobacillus salivarius ssp. salivarius JCM1231 (L. salivarius JCM1231) culture filtrate against Fusarium solani (F. solani) and its effects on murine keratocytes (MKs) infected with F. solani. METHODS: L. salivarius JCM1231 was cultured in an anaerobic incubator for 24 h, and the L. salivarius culture filtrate (LSCF) was prepared .The antifungal activity of L. salivarius JCM1231 against F. solani was determined with a plate overlay assay, agar diffusion assay, and conidial germination inhibition test...
June 21, 2017: Current Eye Research
https://www.readbyqxmd.com/read/28635967/social-behaviour-involving-drug-resistance-the-role-of-initial-density-initial-frequency-and-population-structure-in-shaping-the-effect-of-antibiotic-resistance-as-a-public-good
#12
I L Domingues, J A Gama, L M Carvalho, F Dionisio
Bacteria sometimes cooperate with co-inhabiting cells. Pathogenic bacteria, for example, often produce and excrete virulence factors, eventually benefitting both producer and non-producer cells. The role of social interactions involving antibiotic resistance, however, has been more elusive. Enzymes that inactivate β-lactam antibiotics such as ampicillin or penicillin (β-lactamases) are good candidates as public goods. Nonetheless, it has been claimed that bacteria harbouring plasmids of natural origin coding for β-lactamase almost do not protect sensitive bacteria...
June 21, 2017: Heredity
https://www.readbyqxmd.com/read/28634541/campylobacter-jejuni-myocarditis-a-journey-from-the-gut-to-the-heart
#13
M Toba Obafemi, Homeyra Douglas
OBJECTIVES: Campylobacter jejuni is an unusual cause of myocarditis and could easily be missed. METHODS: We describe a case of a 25 year old man, who presented with 3 day history of vomiting and diarrhoea, followed by chest pain and significant high sensitive troponin rise. RESULTS: The patient's profuse diarrhoea was accompanied by raised inflammatory markers, electrocardiogram changes and evidence of cardiomyopathy on transthoracic echocardiogram...
2017: SAGE open medical case reports
https://www.readbyqxmd.com/read/28633496/clinical-sensitivity-and-specificity-of-the-check-points-check-direct-esbl-screen-for-bd-max-a-real-time-pcr-for-direct-esbl-detection-from-rectal-swabs
#14
Dennis Souverein, Sjoerd M Euser, Wil A van der Reijden, Bjorn L Herpers, Jan Kluytmans, John W A Rossen, Jeroen W Den Boer
Objectives: To determine the diagnostic accuracy of the Check-Direct ESBL Screen for BD MAX (ESBL qPCR) and an ESBL culture method to identify ESBLs directly from rectal swabs. Methods: Rectal swabs were obtained from clinical patients by performing cross-sectional (point)prevalence measurements in three regional hospitals. Rectal swabs were analysed by direct culture (ChromID ESBL agar) and with the ESBL qPCR. Suspected ESBL-producing isolates were confirmed with the combination disc method and analysed by WGS...
June 19, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28631966/executive-functioning-of-portuguese-preschoolers-in-the-shape-school-test-a-cross-cultural-study
#15
Joana Rodrigues Rato, Filipa Ribeiro, Alexandre Castro-Caldas
The Shape School is a neuropsychological test of executive functions (EF) for preschool-aged children. The purposes of this study were: (a) to adapt the use of the Shape School for European Portuguese preschool children and (b) to examine the cultural sensitivity of this test comparing the performance of Portuguese sample and U.S. normative sample. The executive functioning of 233 typically developing children aged 3 to 5 years old (M = 57.52; SD = 10.25; in months) was analyzed and according to our results, the adapted version was appropriate to obtain the discrimination among age-groups...
February 22, 2017: Applied Neuropsychology. Child
https://www.readbyqxmd.com/read/28631644/evaluation-of-a-new-rapid-kit-bd-mgit-tbc-identification-test-for-confirmation-of-mycobacterium-tuberculosis-complex
#16
Gandhi Kandhakumari, Selvaraj Stephen
At present, three rapid kits are available globally for the confirmation of Mycobacterium tuberculosis complex (MTBC) in cultures by MPT64 antigen (MPT64 Ag) detection. These include Capilia TB, SD Bioline, and BD MGIT TBc Identification (TBcID). The third kit is yet to be validated in India. We have tested this kit and compared with SD Bioline using conventional tests as gold standard. Seventy-one MTBC (70 M. tuberculosis and one Mycobacterium bovis) and four nontuberculous mycobacteria (NTM) were isolated from 649 clinical specimens in MGIT 960 and/or Lowenstein-Jensen slants (LJ)...
April 2017: Indian Journal of Pathology & Microbiology
https://www.readbyqxmd.com/read/28631638/clinicomicrobiological-profile-of-endophthalmitis-a-10-year-experience-in-a-tertiary-care-center-in-north-india
#17
Gita Satpathy, Niranjan Nayak, Meenakshi Wadhwani, Pradeep Venkwatesh, Atul Kumar, Yograj Sharma, Vishnu Sreenivas
PURPOSE: To determine the clinicomicrobiological profile of infectious agents and their antibiotic susceptibility in different type of endophthalmitis. METHODS: A retrospective review of clinical and microbiological records from January 2001 to December 2010, was performed in 1110 patients diagnosed with different type of endophthalmitis (postoperative, posttraumatic, endogenous and post keratitis) to record the demographic details, clinical presentations; microbiological agents isolated with their antimicrobial sensitivity pattern...
April 2017: Indian Journal of Pathology & Microbiology
https://www.readbyqxmd.com/read/28631591/comparative-evaluation-of-veriflow-%C3%A2-listeria-species-to-usda-culture-based-method-for-the-detection-of-listeria-spp-in-food-and-environmental-samples
#18
Adam C Joelsson, Shawn P Terkhorn, Ashley S Brown, Amrita Puri, Benjamin J Pascal, Zara E Gaudioso, Nicholas A Siciliano
Veriflow(®)Listeria species (Veriflow LS) isa molecular-based assay for the presumptive detection of Listeria spp. from environmental surfaces (stainless steel, sealed concrete, plastic, and ceramic tile) and ready-to-eat (RTE) food matrixes (hot dogs and deli meat). The assay utilizes a PCR detection method coupled with a rapid, visual, flow-based assay that develops in 3 min post-PCR amplification and requires only a 24 h enrichment for maximum sensitivity. The Veriflow LS system eliminates the need for sample purification, gel electrophoresis, or fluorophore-based detection of target amplification and does not require complex data analysis...
June 20, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/28631590/comparative-evaluation-of-veriflow-%C3%A2-salmonella-species-to-usda-and-fda-culture-based-methods-for-the-detection-of-salmonella-spp-in-food-and-environmental-samples
#19
Amrita Puri, Adam C Joelsson, Shawn P Terkhorn, Ashley S Brown, Zara E Gaudioso, Nicholas A Siciliano
Veriflow(®)Salmonella species (Veriflow SS)is a molecular-based assay for the presumptive detection of Salmonella spp. from environmental surfaces (stainless steel, sealed concrete, plastic, and ceramic tile), dairy (2% milk), raw meat (20% fat ground beef), chicken carcasses, and ready-to-eat (RTE) food (hot dogs). The assay utilizes a PCR detection method coupled with a rapid, visual, flow-based assay that develops in 3 min post-PCR amplification and requires only an 18 h enrichment for maximum sensitivity...
June 20, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/28629614/molecular-detection-methods-of-resistance-to-antituberculosis-drugs-in-mycobacterium-tuberculosis
#20
F Brossier, W Sougakoff
OBJECTIVE: Molecular methods predict drug resistance several weeks before phenotypic methods and enable rapid implementation of appropriate therapeutic treatment. We aimed to detail the most representative molecular tools used in routine practice for the rapid detection of resistance to antituberculosis drugs among Mycobacterium tuberculosis strains. MATERIALS AND METHODS: The molecular diagnosis of resistance to antituberculosis drugs in clinical samples or from in vitro cultures is based on the detection of the most common mutations in the genes involved in the development of resistance in M...
June 16, 2017: Médecine et Maladies Infectieuses
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