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ISSN: 2155-9864

Journal of Blood Disorders & Transfusion
Open Access

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Research Article

Dengue Virus: From Basics to New Technology in Testing & Transfusion Safety

Raúl H Morales Borges*

American Red Cross, Puerto Rico Region, USA

*Corresponding Author:
Raúl H Morales Borges
Medical Director, American Red Cross, PR Region
PO Box 366046 San Juan, PR 00936, USA
Tel: (787)759-8100 ext. 3873
Fax: (787) 250-1513
E-mail: [email protected]

Received date: August 29, 2013; Accepted date: October 03, 2013; Published date: October 06, 2013

Citation: Morales Borges RH (2013) Dengue Virus: From Basics to New Technology in Testing & Transfusion Safety. J Blood Disord Transfus 4:161. doi: 10.4172/2155-9864.1000161

Copyright: © 2013 Morales Borges RH. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

In Puerto Rico, dengue was first recognized in 1915 and the most common recent outbreak occurred in 2010. More than 2.5 billion people (1/3 world’s population) live in areas of risk such as Mexico, Central and South America, the Caribbean, and part of Africa and Asia continents. The Dengue exists in United States in the southern areas as well as in the Mexico border. An estimated 50 million cases occur annually and DENV was the leading cause of febrile illness among 17,353 ill travelers returning from the Caribbean, South America, South Central Asia, and Southern Asia. Dengue fever is caused by the transmission of four dengue virus types to humans primarily via a mosquito vector. Most people infected with the virus have no symptoms or a mild fever and transfusion-transmitted dengue infections have been described in three clusters (Hong Kong, Singapore and Puerto Rico). Based on the data generated during the nonstructural protein 1 (NSI) antigen (Ag) Investigational New Drug (IND) by a research transcription-mediated amplifications (TMA) assay, the sensitivity of the Dengue TMA test is at least 2 to 3 fold higher than NS1 Ag assay. Dengue RNA detected by TMA is detected prior to NS1 Ag in infected individuals and persists for longer periods of time during the ramp up phase of antibody production when donors may still be infectious. Donations during the window period between TMA and NS1 Ag detection may be infectious. Transfusion transmission has been demonstrated. Only 17.5% of 140 People from PR studied by a questionnaire know that mode of transmission. We need to educate more health professionals. We still need more studies in testing and prevention.

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