Scanning Electronmicroscopy of Staphylococcus Aureus and Enterococcus Faecalis Exposed to Daptomycin
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چکیده
منابع مشابه
Molecular epidemiology of Staphylococcus aureus and Enterococcus faecalis in endophthalmitis.
Genomic DNA fingerprint analysis was performed on 39 Staphylococcus aureus and 28 Enterococcus faecalis endophthalmitis isolates collected from multiple clinical centers. Among 21 S. aureus genomic DNA fingerprint patterns identified, five clonotypes were recovered from multiple unrelated patients and accounted for 58.9% (23 of 39) of the isolates analyzed. Compared with strains having unique g...
متن کاملبررسی اثر فتوتوکسیک عصارۀ گیاه هوفاریقون بر Enterococcus Faecalis، Staphylococcus Aureus و Escherichia Coli
مقدمه: عصارۀ گیاه هوفاریقون با نام علمی Hypericum Perforatum L. به‌عنوان یک حساس‌گر نوری جدید برای درمان فتودینامیکی در چندین مطالعۀ آزمایشگاهی مورد بررسی قرار گرفته است. اما، چنین به‌نظر می‌رسد که فعالیت فتوتوکسیک این عصاره تاکنون به‌شکل مستقل بر‌روی باکتری‌ها مطالعه نشده است. لذا، هدف از این پژوهش بررسی اثر فتوتوکسیک عصارۀ گیاه Hypericum Perforatum (به‌شکل قطرۀ خوراکی هایپیران) بر سویه‌های اس...
متن کاملThe Electron Transport Chain Sensitizes Staphylococcus aureus and Enterococcus faecalis to the Oxidative Burst.
Small-colony variants (SCVs) of Staphylococcus aureus typically lack a functional electron transport chain and cannot produce virulence factors such as leukocidins, hemolysins, or the antioxidant staphyloxanthin. Despite this, SCVs are associated with persistent infections of the bloodstream, bones, and prosthetic devices. The survival of SCVs in the host has been ascribed to intracellular resi...
متن کاملEnterococcus faecalis and pathogenic streptococci inactivate daptomycin by releasing phospholipids
Daptomycin is a lipopeptide antibiotic with activity against Gram-positive bacteria. We showed previously that Staphylococcus aureus can survive daptomycin exposure by releasing membrane phospholipids that inactivate the antibiotic. To determine whether other pathogens possess this defence mechanism, phospholipid release and daptomycin activity were measured after incubation of Staphylococcus e...
متن کاملDiminished macrophage inflammatory response to Staphylococcus aureus isolates exposed to daptomycin versus vancomycin or oxacillin.
Exposure of any of six clinical isolates of Staphylococcus aureus to daptomycin alone or in combination with vancomycin or oxacillin (compared with vancomycin or oxacillin alone) led to a dampened macrophage inflammatory response with diminished tumor necrosis factor secretion and reduced accumulation of inducible nitric oxide synthase protein.
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ژورنال
عنوان ژورنال: Journal of Medical Microbiology
سال: 1989
ISSN: 0022-2615,1473-5644
DOI: 10.1099/00222615-30-1-45