activated sludge or extended aeration treatment involves a continous system where aerobic biological growths are mixed with waste water and then separated in a gravity clarifier. therefore, waste treatment system such as the activated sludge system depend on the activities of communities of living organism. in this study, an attempt was made on the indentification of the bacterial population in...

objective: adhesion of lactobacillus acidophilus (l. acidophilus) to dental porcelain surface may lead to gingival inflammation and secondary caries. surface roughness is among the factors affecting this adhesion. the purpose of this study was to evaluate the effects of four different surface treatment methods on adhesion of l. acidophilus to dental porcelain.   methods: sixty specimens (3x10mm...

background: previous studies have demonstrated the value of serum procalcitonin (pct) as a marker of bacterial infection, as well as the rapid decrease in its concentration with appropriate antibiotic treatment. the aim of this study was to determine the variation in serum pct levels over time during the treatment of acute bacterial meningitis (abm) in adults. methods: in this prospective analy...

a 4 days study was conducted to determine the effects of different concentration of bioaugmentor bacterial strain bacillus licheniformisi, b. subtilis, b. polymyxa, b. laterosporus and b. circulans (protexin aquatech, uk) on adjustment of parameters of water quality as tan, no2-n, no3-n and turbidity from the effluent of common carp ponds. effects of time and concentration were studied as a com...

BACKGROUND AND OBJECTIVES Compared with conventional treatment, early surgery significantly reduced the composite end point of all-cause death and embolic events during hospitalization, but long-term data in this area are lacking. This study sought to compare long-term outcomes of early surgery with a conventional treatment strategy in patients with infective endocarditis (IE) and large vegetat...

WHAT DID THE AUTHORS STUDY? In their study, “Dexamethasone and long-term survival in bacterial meningitis,” Dr. Fritz and his colleagues carefully evaluated 2 ways to treat bacterial meningitis. They compared steroids (dexamethasone) with placebo. The doctors gave medication (or placebo) in addition to antibiotics, the usual treatment for bacteria. In other words, Dr. Fritz et al. compared anti...