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    Going Beyond Counting First Authors in Author Co-citation Analysis

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    The present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed

    Neurobrucellosis: diagnostic and clinical management of an atypical case

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    Brucellosis is the most common zoonosis in the world and it is caused by ingestion of foods contaminated by Brucella spp. that is able to avoid the immune system and can involve every organ system. The bacteria may affect the Central Nervous System (CNS) directly or using phagocytic cells with the way of the "Trojan Horse Model". Meningitis is the most common form of neuro-brucellosis (NB) but other neurological manifestation, with variable onset, such as severe encephalic involvement, neuropathy, vascular damage, radiculitis and hydrocephalus might happened. NB may manifest itself with an acute or chronic onset and could be the only manifestation of the infection or appearance during the systemic disease. Frequently the diagnosis might be very difficult and the clinical characteristics and the microbiological demonstration in the blood and in the CSF are necessary. The prognosis of brucella meningitis is generally better than other forms of chronic meningitis except for encephalitis or spinal cord involvement. The treatment is based on the combination of two or three antibiotics to achieve normalization of the cerebrospinal fluid parameters otherwise relapse are relatively frequent. We describe an atypical case of brucellar meningitis with many stroke-like signs, think as recurrent cerebrovascular events and treated with antithrombotic therapy, but without meningeal syndrome
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