[Seroprevalence of pandemic influenza A (H1N1)pdm09 in two regions in Morocco following the 2010-2011 influenza season].

Purposes: To study and to compare the prevalence of infection with the virus A(H1N1)pdm 2009 in the population of two regions of Morocco compared to preexisting antibody levels.

Patients And Methods: A total of 300 and 200 serum samples were collected in the region of Rabat and Meknes respectively. Samples were collected during March to April 2011.

[Mixed cryoglobulinemia with monoclonal IgA and biclonal IgM during hepatitis C virus infection].

Cryoglobulins are immunoglobulins that precipitate at low temperature and dissolve when warmed. According to Brouet, their classification relies upon the immunochemical study: type I comprises monoclonal immunoglobulins (IGG), when types II and III include both monoclonal and polyclonal components. During C hepatitis, the presence of a cryoglobulin, essentially made of mixed G-IGG and M-IGG, is a common feature with a prevalence of 40 to 80%.

[Predictive factors of atrial fibrillation in mitral stenosis. Clinical and echocardiographic study].

The objective of this study was to define the predictive factors of atrial fibrillation in pure or very predominant mitral stenosis in a series of 472 consecutive patients divided into 2 groups according to the presence (group I: n = 113) or absence (group II: n = 359) of permanent atrial fibrillation. Univariate analysis showed that predictive factors for atrial fibrillation in mitral stenosis are age (40.3 +/- 9 years vs 31.