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Nadine Wittkopf et al.
PloS one, 10(3), e0118401-e0118401 (2015-03-24)
Gastrointestinal infections with EHEC and EPEC are responsible for outbreaks of diarrheal diseases and represent a global health problem. Innate first-line-defense mechanisms such as production of mucus and antimicrobial peptides by intestinal epithelial cells are of utmost importance for host
Genetic elements responsible for erythromycin resistance in streptococci.
Pietro E Varaldo et al.
Antimicrobial agents and chemotherapy, 53(2), 343-353 (2008-11-13)
Masato Higashide et al.
Antimicrobial agents and chemotherapy, 52(6), 2061-2068 (2008-03-26)
Staphylococcus saprophyticus is a uropathogenic bacterium that causes acute uncomplicated urinary tract infections, particularly in female outpatients. We investigated the dissemination and antimicrobial susceptibilities of 101 S. saprophyticus isolates from the genitourinary tracts of patients in Japan. Eight of these
C Ma et al.
Mini reviews in medicinal chemistry, 10(4), 272-286 (2010-05-18)
The rapid emergence of drug resistance intensified the search for new antimicrobial agents, leading to lots of novel derivatives obtained from 14- and 15-membered macrolides by chemical modifications. Many of them exhibited enhanced antibacterial activity and expanded antibacterial spectrum. Especially
Xinzhu Yi et al.
Analytical and bioanalytical chemistry, 407(30), 9071-9083 (2015-10-10)
A solid-phase extraction/liquid chromatography/electrospray ionization/multi-stage mass spectrometry (SPE-LC-ESI-MS/MS) method was optimized in this study for sensitive and simultaneous detection of multiple antibiotics in urban surface waters and soils. Among the seven classes of tested antibiotics, extraction efficiencies of macrolides, lincosamide
Yaoquan Liu et al.
Bioorganic & medicinal chemistry letters, 20(19), 5658-5661 (2010-08-31)
A series of 9-dihydroerythromycin A and B analogues with modification of the desosamine nitrogen have been synthesized and screened for motilin agonist activity, antibiotic activity, tachyphylaxis and hERG channel current inhibition. Small alkyl groups resulted in the potency while compounds
Zuzana Svetlíková et al.
Antimicrobial agents and chemotherapy, 53(9), 4015-4018 (2009-07-08)
Nosocomial outbreaks attributable to glutaraldehyde-resistant, rapidly growing mycobacteria are increasing. Here, evidence is provided that defects in porin expression dramatically increase the resistance of Mycobacterium smegmatis and Mycobacterium chelonae to glutaraldehyde and another aldehyde disinfectant, ortho-phthalaldehyde. Since defects in porin
Yasuki Yasuda et al.
Antimicrobial agents and chemotherapy, 51(5), 1741-1752 (2007-03-14)
Sub-MIC levels of macrolides down-regulate bacterial virulence factors and suppress inflammatory processes. The ability of macrolides to reduce the production of pneumolysin has been shown to explain the discrepancy between in vitro resistance and outcomes with macrolides against macrolide-resistant Streptococcus
Corinna Kehrenberg et al.
Antimicrobial agents and chemotherapy, 53(2), 779-781 (2008-12-03)
Methicillin-resistant Staphylococcus aureus clonal lineage ST398 and methicillin-susceptible lineage ST9 strains have their main reservoir in swine but can colonize and cause infections in humans. The phenicol/lincosamide/oxazolidinone/pleuromutilin/streptogramin A multidrug resistance gene cfr was detected in isolates of both clonal lineages
Giovanni Appendino et al.
Journal of natural products, 69(2), 251-254 (2006-02-28)
An investigation of the polar glycosidic fraction from the leaves of myrtle afforded four galloylated nonprenylated phloroglucinol glucosides (3a-d) related to the endoperoxide hormone G3 (4) in terms of structure and biogenesis. Despite their close similarity, significant antibacterial activity was
Sarbani Mohan et al.
Molecular immunology, 62(1), 249-264 (2014-07-22)
Streptococcus pneumoniae is a Gram-positive bacterium, causing acute sinusitis, otitis media, and severe diseases such as pneumonia, bacteraemia, meningitis and sepsis. Here we identify elongation factor Tu (Tuf) as a new Factor H binding protein of S. pneumoniae. The surface
Tom D Heightman et al.
Bioorganic & medicinal chemistry letters, 18(24), 6423-6428 (2008-11-05)
High-throughput screening resulted in the identification of a series of novel motilin receptor agonists with relatively low molecular weights. The series originated from an array of biphenyl derivatives designed to target 7-transmembrane (7-TM) receptors. Further investigation of the structure-activity relationship
Site-directed mutagenesis reveals amino acid residues in the Escherichia coli RND efflux pump AcrB that confer macrolide resistance.
Caroline Wehmeier et al.
Antimicrobial agents and chemotherapy, 53(1), 329-330 (2008-10-22)
C R Bourne et al.
Antimicrobial agents and chemotherapy, 54(9), 3825-3833 (2010-07-08)
The bacterial burden on human health is quickly outweighing available therapeutics. Our long-term goal is the development of antimicrobials with the potential for broad-spectrum activity. We previously reported phthalazine-based inhibitors of dihydrofolate reductase (DHFR) with potent activity against Bacillus anthracis
Giovanni Appendino et al.
Journal of natural products, 71(8), 1427-1430 (2008-08-07)
Marijuana (Cannabis sativa) has long been known to contain antibacterial cannabinoids, whose potential to address antibiotic resistance has not yet been investigated. All five major cannabinoids (cannabidiol (1b), cannabichromene (2), cannabigerol (3b), Delta (9)-tetrahydrocannabinol (4b), and cannabinol (5)) showed potent
Sean Ekins et al.
Drug metabolism and disposition: the biological fate of chemicals, 38(12), 2302-2308 (2010-09-17)
Drug-induced liver injury (DILI) is one of the most important reasons for drug development failure at both preapproval and postapproval stages. There has been increased interest in developing predictive in vivo, in vitro, and in silico models to identify compounds
Stephen J Baker et al.
Bioorganic & medicinal chemistry letters, 16(23), 5963-5967 (2006-09-26)
A series of borinic acid picolinate esters were synthesized and screened for their minimum inhibitory concentration (MIC) against Gram-positive and -negative bacteria. Our lead compounds were then screened for anti-inflammatory activity. From these studies, we identified 3-hydroxypyridine-2-carbonyloxy-bis(3-chloro-4-methylphenyl)borane (2g, AN0128) as
James J Leyden
Journal of drugs in dermatology : JDD, 11(12), 1434-1438 (2013-02-05)
To quantify the antimicrobial effect of clindamycin phosphate 1.2% and tretinoin 0.025% gel and 1% clindamycin phosphate gel in patients with Propionibacterium acnes of varying sensitivity to clindamycin. Study 1 was an initial range-finding study that was neither blinded nor
Yaya Rukayadi et al.
Antimicrobial agents and chemotherapy, 53(10), 4529-4532 (2009-08-05)
In vitro antistaphylococcal activities of panduratin A, a natural chalcone compound isolated from Kaempferia pandurata Roxb, were compared to those of commonly used antimicrobials against clinical staphylococcal isolates. Panduratin A had a MIC at which 90% of bacteria were inhibited
Y Li et al.
Molecular oral microbiology, 30(5), 376-383 (2015-04-22)
Streptococcus mutans is a primary pathogen responsible for dental caries. It has an outstanding ability to form biofilm, which is vital for virulence. Previous studies have shown that knockout of Wall-associated protein A (WapA) affects cell chain and biofilm formation
Qian Wang et al.
Antimicrobial agents and chemotherapy, 54(6), 2707-2711 (2010-03-17)
Biofilm formation in Staphylococcus epidermidis is mediated by icaADBC-dependent and -independent pathways. Subinhibitory concentrations of erythromycin, azithromycin, and clarithromycin enhanced, in a dose-dependent manner, the level of biofilm formation by 20% (21/105 isolates) by macrolide-resistant ica-positive and -negative isolates tested
Qiang Xue et al.
Environmental science and pollution research international, 22(21), 16857-16867 (2015-06-25)
An optimized solid-phase extraction (SPE) and ultra-high performance liquid chromatography-electrospray tandem mass spectrometry (UPLC-MS/MS) method was developed for the effective analysis of 35 antibiotics including sulfonamides (SAs), quinolones (QLs), tetracyclines (TCs), macrolides (MALs), lincomycin (LIN), and chloramphenicol (CAP). The addition
Margot E Grinwis et al.
Antimicrobial agents and chemotherapy, 54(7), 2823-2829 (2010-04-21)
Organisms belonging to the Streptococcus milleri group (SMG) are known for their role in pyogenic infections but have recently been implicated as etiological agents of pulmonary exacerbation in adult patients with cystic fibrosis (CF). The prolonged exposure of CF patients
Haroon Mohammad et al.
PloS one, 10(11), e0142321-e0142321 (2015-11-05)
The emergence of community-associated methicillin-resistant Staphylococcus aureus (MRSA), including strains resistant to current antibiotics, has contributed to an increase in the number of skin infections reported in humans in recent years. New therapeutic options are needed to counter this public
Shankumar Mooyottu et al.
International journal of food microbiology, 192, 111-116 (2014-12-03)
Clostridium difficile is a pathogen of significant public health concern causing a life-threatening, toxin-mediated enteric disease in humans. The incidence and severity of the disease associated with C. difficile have increased in the US with the emergence of hypervirulent strains
Emanuela Marini et al.
Veterinary microbiology, 178(1-2), 99-104 (2015-05-04)
Integrative conjugative elements (ICEs) are mobile genetic elements that reside in the chromosome but retain the ability to undergo excision and to transfer by conjugation. Genes involved in drug resistance, virulence, or niche adaptation are often found among backbone genes
Pei-Feng Liu et al.
The Journal of investigative dermatology, 135(11), 2714-2722 (2015-07-03)
Methicillin-resistant Staphylococcus aureus (MRSA) has emerged as a major nosocomial pathogen that is widespread in both health-care facilities and in the community at large, as a result of direct host-to-host transmission. Several virulence factors are associated with pathogen transmission to
Yudong Liu et al.
Antimicrobial agents and chemotherapy, 53(2), 512-518 (2008-11-26)
Methicillin (meticillin)-resistant Staphylococcus aureus (MRSA) is a serious problem worldwide. To investigate the molecular epidemiology of MRSA isolates in China, a total of 702 MRSA isolates collected from 18 teaching hospitals in 14 cities between 2005 and 2006 were characterized
Roberta Colicchio et al.
Infection and immunity, 77(9), 3578-3587 (2009-06-17)
Experimental animal models of bacterial meningitis are useful to study the host-pathogen interactions occurring at the cerebral level and to analyze the pathogenetic mechanisms behind this life-threatening disease. In this study, we have developed a mouse model of meningococcal meningitis
Dhafer Alsalah et al.
International journal of environmental research and public health, 12(10), 12391-12411 (2015-10-09)
This study examines the groundwater quality in wells situated near agricultural fields in Saudi Arabia. Fruits (e.g., tomato and green pepper) irrigated with groundwater were also assessed for the occurrence of opportunistic pathogens to determine if food safety was compromised
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