ABSTRACT
We report a case of a carotid artery bifurcation aneurysm which ruptured into a silvian fissure arachnoid cyst. In the review of the literature, only three cases were before reported. We discuss about uncommon clinical findings, the surgical aspects and the associations among the lesions.
Subject(s)
Aneurysm, Ruptured/complications , Arachnoid Cysts/complications , Intracranial Aneurysm/complications , Subarachnoid Hemorrhage/etiology , Adult , Aneurysm, Ruptured/diagnostic imaging , Aneurysm, Ruptured/surgery , Arachnoid Cysts/diagnostic imaging , Arachnoid Cysts/surgery , Cerebral Angiography , Humans , Intracranial Aneurysm/diagnostic imaging , Intracranial Aneurysm/surgery , Male , Tomography, X-Ray ComputedABSTRACT
The minimal antibiotic concentration (MAC) is the lowest concentration of an antibacterial agent that produces a decrease of 1 log in the number of organisms/ml as compared with a control culture in drug-free medium. Various gram-negative bacilli and gram-positive cocci were grown in the presence of amikacin, gentamicin, tobramycin, ampicillin, amoxicillin, oxacillin, carbenicillin, ticarcillin, and cefamandole at concentrations varying from eight times the minimal inhibitory concentration (MIC) to 1/128 of the MIC. Colony forming units (cfu) were counted, the MIC was determined, and the MIC:MAC ratio, which indicates the magnitude of the effective range, was calculated. The MIC:MAC ratio appears to be characteristic for a given species and antibiotic. There is no relation between the MICs and the MIC:MAC ratios. The highest ratios were given by Proteus mirabilis with aminoglycosides (MIC:MAC mean, 29.2 with tobramycin), and the lowest ratios were given with beta-lactam antibiotics by Pseudomonas aeruginosa and Streptococcus faecalis (MIC:MAC means, 2.1 with carbenicillin and cefamandole, respectively).
