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Osman M.,University of Lille Nord de France | Osman M.,Lebanese University | El Safadi D.,University of Lille Nord de France | El Safadi D.,Lebanese University | And 11 more authors.
PLoS ONE | Year: 2015

Cryptosporidium spp. represent a major public health problem worldwide and infect the gastrointestinal tract of both immunocompetent and immunocompromised persons. The prevalence of these parasites varies by geographic region, and no data are currently available in Lebanon. To promote an understanding of the epidemiology of cryptosporidiosisin this country, the main aim of this study was to determine the prevalence Cryptosporidium in symptomatic hospitalized patients, and to analyze the genetic diversity of the corresponding isolates. Fecal specimens were collected in four hospitals in North Lebanon from 163 patients (77 males and 86 females, ranging in age from 1 to 88 years, with a mean age of 22 years) presenting gastrointestinal disorders during the period July to December 2013. The overall prevalence of Cryptosporidium spp. infection obtained bymodified Ziehl-Neelsen staining and/or nested PCR was 11%, and children <5 years old showed a higher rate of Cryptosporidium spp. The PCR products of the 15 positive samples were successfully sequenced. Among them, 10 isolates (66.7%) were identified as C. hominis, while the remaining 5 (33.3%) were identified as C. parvum. After analysis of the gp60 locus, C. hominis IdA19, a rare subtype, was found to be predominant. Two C. parvum subtypes were found: IIaA15G1R1 and IIaA15G2R1. The molecular characterization of Cryptosporidium isolates is an important step in improving our understanding of the epidemiology and transmission of the infection. © 2015 Osman et al.

Creusy C.,Groupe Hospitalier Of Luniversite Catholique Of Lille | Certad G.,Ifr 142 Institute Pasteur Of Lille | Certad G.,Central University of Venezuela | Guyot K.,Ifr 142 Institute Pasteur Of Lille | Dei-Cas E.,Ifr 142 Institute Pasteur Of Lille
NATO Science for Peace and Security Series A: Chemistry and Biology | Year: 2010

In the last years a large number of infectious agents including virus, bacteria and parasites have been identified as direct causes or as risk factors to specific cancers around the world. Among the parasites linked to oncogenesis in humans there are strong associations. Particularly, Schistosoma haematobium is usually recognized as a cause of urinary bladder carcinoma. Some hepatic and colorectal cancers have been linked to infection by S. japonicum or S. mansoni. Moreover, a high proportion of cholangiocarcinoma in Far-East countries was imputable to Opisthorchiidae liver flukes. Among the parasitic Protists, the Apicomplexan Theileria annulata and T. parva, which are the agents of theileriosis in cows, induce often lethal lymphoproliferative process in these animals. The association between Cryptosporidium and digestive carcinomas has also been reported in a clinic study in Poland. More recently, the ability of C. parvum to induce neoplastic changes was established experimentally. This model revealed that C. parvum strains are able to induce gastrointestinal intraepithelial neoplasia in dexamethasone-treated SCID mice. Neoplastic lesions spread often to more than one digestive organ, and severity correlated with the inoculum size and the duration of the infection. Further studies are needed in order to characterize this process in mice, and to explore its occurrence in human cryptosporidiosis. © Springer Science+Business Media B.V. 2010.

Certad G.,University of Lille Nord de France | Certad G.,Jose Maria Vargas University | Creusy C.,Groupe Hospitalier Of Luniversite Catholique Of Lille | Guyot K.,University of Lille Nord de France | And 10 more authors.
International Journal for Parasitology | Year: 2010

We recently demonstrated that Cryptosporidium parvum IOWA strain induces in situ ileo-caecal adenocarcinoma in an animal model. Herein, the ability of another C. parvum strain to induce digestive neoplasia in dexamethasone-treated SCID mice was explored. SCID mice infected with C. parvum TUM1 strain developed a fulminant cryptosporidiosis associated with intramucosal adenocarcinoma, which is considered an early histological sign of invasive cancer. Both evidence of a role of C. parvum in adenocarcinoma induction and the extended prevalence of cryptosporidiosis worldwide, suggest that the risk of C. parvum-induced gastro-intestinal cancer in humans should be assessed. © 2010 Australian Society for Parasitology Inc.

Jimenez J.C.,University of Lille Nord de France | Jimenez J.C.,Central University of Venezuela | Fontaine J.,French Institute of Health and Medical Research | Creusy C.,Groupe Hospitalier Of Luniversite Catholique Of Lille | And 5 more authors.
Parasitology Research | Year: 2014

The humoral and cellular responses against excretory/secretory proteins and soluble extracts of Giardia intestinalis were evaluated in the course of experimental G. intestinalis infection in BALB/c mice. Production of IgG1, IgG2a, IgA, and IgE antibodies against excreted/secreted proteins and soluble extract was detected after infection by G. intestinalis. Specific IgA antibody against E/S proteins and soluble extract form intestinal fluids in infected mice was detected by ELISA. The Western blotting identified proteins of 30, 58, 63, and 83 kDa for IgA and IgG, respectively. High proliferation rate in vitro of spleen cell and secretion of interleukin-4 (IL-4) at 21 days p.i. after stimulation with excreted/secreted proteins and low proliferative response in the presence of soluble extract in infected BALB/c mice was observed. High production of interferon gamma (IFN-γ) and interleukin-5 (IL-5) at the time of decreasing cyst output (14-21 days p.i.) in infected mice was recorded, suggesting the important role of these cytokines in the control of the infection. Interestingly, progressive and gradual increase of the interleukin-10 after stimulation with both preparations was recorded from 7 days until 28 days after infection, indicating the possible regulatory effect of these antigens on the immune response during Giardia infection. Therefore, the infection by Giardia duodenalis stimulates a mixed response Th1 and Th2, mainly stimulated by excretory/secretory antigens. The immunogenicity of these antigens may be a suitable for identification of the proteins related with the effective immune response in the course of infection by G. duodenalsis. © 2014 Springer-Verlag.

Zanati J.,Groupe Hospitalier Of Luniversite Catholique Of Lille | Resch B.,Service de maternite | Roman H.,Service de maternite | Brabant G.,Groupe Hospitalier Of Luniversite Catholique Of Lille | And 7 more authors.
Journal de Gynecologie Obstetrique et Biologie de la Reproduction | Year: 2010

Post-partum haemorrhage remains a major cause of maternal mortality. Surgical management may be needed in patients with hemodynamic instability. Arterial embolization may be needed in case of persisting haemorrhage despite initial surgical management. We report a case of buttock necrosis occurring after pelvic embolization to control refractory post-partum haemorrhage and failed subtotal hysterectomy with bilateral internal iliac arteries ligation. To the best of our knowledge, this is the first case of buttock necrosis complicating a severe post-partum haemorrhage reported in the literature. © 2009 Elsevier Masson SAS. All rights reserved.

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