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false/bactericida
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[Screening for phenylketonuria without false readings from antibacterial agents].
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Antibacterial skin preparation decreases the incidence of false-positive semen culture results.
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OBJECTIVE
Antibacterial skin preparation was used before obtaining semen cultures to assess whether true seminal pathogens could be isolated with greater specificity.
METHODS
A total of 14 paired semen cultures were obtained from men evaluated for infertility. The first set (group 1) was obtained
[The bactericidal effect of oxybuprocaine. A possible cause of false negative results in bronchoalveolar lavage].
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New approaches in the diagnosis of pneumonia, especially in intensive care units, are quantitative cultures of bronchoalveolar (BAL) fluid or the protected specimen brush. The sensitivity of these methods, however, has often been found to be as low as 50-60%. One possible explanation for the low
False-positive results of Aspergillus galactomannan antigenemia in liver transplant recipients.
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BACKGROUND
Aspergillus galactomannan (GM) antigenemia is an early marker of invasive aspergillosis (IA), but may yield false-positive results. A prospective study, testing GM periodically in serum samples of liver transplant recipients, was performed.
METHODS
An index more than or equal to 0.5 were
Bioactive bis-naphtho-γ-pyrones from rice false Smut pathogen Ustilaginoidea virens.
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Ustilaginoidins were bis-naphtho-γ-pyrones mycotoxins possessing an aR configuration of the chiral axis previously reported from the false smut balls of rice infected by the fungal pathogen Ustilaginoidea virens. To investigate the chemical diversity of these metabolites and their bioactivities, we
Nitroblue tetrazolium (NBT) test: criteria for false positivity and its use in practice.
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The criteria for false positivity of the NBT test were described including absence of classical clinical signs of bacterial infection, negative blood (and, if necessary, other) cultures, and lack of response of antibacterial treatment as the basis for appreciation of positive NBT test result as
New nitrogen-containing metabolites from cultures of rice false smut pathogen Villosiclava virens.
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Two new nitrogen-containing metabolites methyl N-acetyl-O-(4-acetylphenyl)-L-homoserinate (1), dimethyl (1H-indole-3-carbonyl)-D-glutamate (2), and two new natural products, 1,2-O-isopropylidene-D-mannitol (3),
[Detection of bacteria in urine using dip-slides (1). Possible occurrence of false-negative results when dip-slides are used for urine containing antibacterial agents].
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Dip-slides are used as semiquantitative microbial sampling devices that are simple to use in routine testing of urine to detect the presence of bacteria, and are recommended for use in "Standard evaluation of drug efficacy in UTI". Bacterial growth on currently available dip-slides, however, may
Insufficient neutralization in testing a chlorhexidine-containing ethanol-based hand rub can result in a false positive efficacy assessment.
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BACKGROUND
Effective neutralization in testing hand hygiene preparations is considered to be a crucial element to ensure validity of the test results, especially with the difficulty to neutralize chlorhexidine gluconate. Aim of the study was to measure the effect of chemical neutralization under
Detection of selective antibacterial peptides by the Polarity Profile method.
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Antimicrobial peptides occupy a prominent place in the production of pharmaceuticals, because of their effective contribution to the protection of the immune system against almost all types of pathogens. These peptides are thoroughly studied by computational methods designed to shed light on their
An evidence-based analysis of the antibacterial effectiveness of intracanal medicaments.
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The authors reviewed the literature evaluating the antibacterial effectiveness of intracanal medicaments used in the management of apical periodontitis. A PICO (problem, intervention, comparison, outcome) strategy was developed to identify studies dealing with calcium hydroxide, phenolic
Antibacterial activity of fullerene water suspensions (nC60) is not due to ROS-mediated damage.
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The cytotoxic and antibacterial properties of nC 60, a buckminsterfullerene water suspension, have been attributed to photocatalytically generated reactive oxygen species (ROS). However, in this work, neither ROS production nor ROS-mediated damage is found in nC 60-exposed bacteria. Furthermore, the
Antibacterial properties of lidocaine on bacteria isolated from dermal lesions.
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We studied the antibacterial properties of lidocaine and lidocaine with methylparaben, employing bacteria that were isolated from dermal lesions. Our study was significant because local anesthetics utilized before obtaining material for biopsy and/or culture may result in false-negative results.
Neutralization of Bactericidal Activity Related to Antimicrobial Carryover in Broiler Carcass Rinse Samples.
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Studies were conducted to examine the ability of three chemicals to neutralize residual antibacterial activity of commercial antimicrobial chemicals used in poultry processing. Chemical antimicrobial interventions used in poultry processing may have potential for carryover into whole poultry carcass
Performance accuracy of antibacterial and antifungal susceptibility test methods: report from the College of American Pathologists Microbiology Surveys Program (2001-2003).
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BACKGROUND
The College of American Pathologists Microbiology Surveys Program provides external proficiency samples that monitor the performance of nearly 3000 laboratories that perform and report antimicrobial susceptibility tests.
OBJECTIVE
To summarize results obtained with bacterial and yeast
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