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Identification of adenoviruses serotypes implicated in haemorrhagic conjunctivitis in Tunisia

Abstract : Human adenoviruses (ADV) are distributed worldwide; they are associated with a variety of diseases. Some ADV can be implicated in large epidemics of conjunctivitis, gastroenteritis and respiratory infections. Classical diagnosis of ADV infections is based on virus isolation on cell culture and identification of the serotype by neutralization test or hemagglutination inhibition assay. However, these methods have a lack of rapidity that makes them impractical in clinical situations. With the advent of PCR, the diagnosis of ADV was improved. In this work, we have used molecular techniques for the identification of ADV serotypes implicated in conjunctivitis in Tunisia. A total of 199 conjunctival swabs received between October 2000 and May 2005 were investigated. Serotype identification was performed using a PCR followed by restriction enzyme analysis in the hexon gene. Typing by sequencing of the PCR product was used to confirm the serotype identification. Among the 199 tested clinical specimens, 24% were positive for ADV. Two different profiles were observed: one predominant corresponding to the majority of the detected ADV; this profile is in favour of two distinct serotypes, ADV37 or ADV8; the second profile was specific of ADV4 and was found in one case observed in 2005. Sequencing confirmed two serotypes: ADV8 with an endemoepidemically circulation in our country and ADV4 that appeared sporadic. The present work showed the importance of molecular techniques not only for ADV detection but also for identification of the circulating serotypes. These techniques are practical and interesting mainly for the rapid virological investigation during epidemics. (c) 2006 Elsevier Masson SAS. Toes droits reserves.
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Submitted on : Monday, December 19, 2016 - 2:38:50 PM
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D. Rezig, O. Bahri, N. Ben Ayed, A. Ben Yahia, A. Sadraoui, et al.. Identification of adenoviruses serotypes implicated in haemorrhagic conjunctivitis in Tunisia. Pathologie Biologie, 2006, 54 (10), pp.561-565. ⟨10.1016/j.patbio.2006.07.029⟩. ⟨pasteur-01375262⟩



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