14th ICID - Poster Abstracts - International Society for Infectious ...

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When citing these abstracts please use the following reference: Author(s) of abstract. Title of abstract [abstract]. Int J Infect Dis 2010;14S1: Abstract number. Please note that the official publication of the International Journal of Infectious Diseases 2010, Volume 14, Supplement 1 is available electronically on http://www.sciencedirect.com Final Abstract Number: 84.033 Session: Virology and Viral Infections (Non-HIV) Date: Friday, March 12, 2010 Time: 12:30-13:30 Room: Poster & Exhibition Area/Ground Level Type: Poster Presentation Para influenza type 3 epidemic in intermediate care nursery K. AlTawil 1 , S. al saif 2 , I. Ali 2 , H. Tawakol 2 , A. Shafei 3 1 king Abdul aziz Medical City, riyadh, Saudi Arabia, 2 King Abdel Aziz Medical City, Riyadh, Saudi Arabia, 3 King Abdel Aziz Medical City, Riyadh, Saudi Arabia Background: Para influenza virus (PIV) causes more than 30% of all acute respiratory infections in infants and children. PIV type 3 accounts for the majority of infections in newborn infants. The objective was to describe an epidemic of PIV infection in the intermediate care neonatal unit (IMCNU) of king Fahad National Guard Hospital, Riyadh-KSA Methods: Prospective descriptive report of viral epidemic occurred in the IMCNU Results: During the period April 26 to May 6,2008; a total of 7 infants proved to be infected with PIV type 3,The attack rate was 12.7%(7 infants affected out of 55 infants exposed),median birth weight of 1850 gms (range :735-2750gms ), and median gestational age of 30 weeks( range : 26- 39 weeks) and median postnatal age of 37 days ( range: 17-123 days ). Five infants presented with apneas and desaturaration, 4 infants were observed coughing and 4 infants showed excessive nasopharyngeal secretion. Four infants were having chronic lung disease as a predisposing factor. Infants positive for PIV were cohorted together in 2 isolation rooms, other contacts infants were also nursed together in a different zone of the unit and the unit continued to receive new admission. One infant needed nasal intermittent ventilation and 4 babies responded to oxygen therapy by nasal cannula. Al infants survived and discharged in good conditions Conclusion: PIV infection of little infants in IMCNU may cause destabilization of their clinical conditions and can precipitate serious episodes of cardiorespiratory instabilities. Conservative management of affected infants usually adequate. PIV epidemic can be controlled by utilizing basic infectious barriers precautions and cohorting infected inants together
When citing these abstracts please use the following reference: Author(s) of abstract. Title of abstract [abstract]. Int J Infect Dis 2010;14S1: Abstract number. Please note that the official publication of the International Journal of Infectious Diseases 2010, Volume 14, Supplement 1 is available electronically on http://www.sciencedirect.com Final Abstract Number: 84.034 Session: Virology and Viral Infections (Non-HIV) Date: Friday, March 12, 2010 Time: 12:30-13:30 Room: Poster & Exhibition Area/Ground Level Type: Poster Presentation Introduction of a new lineage VP7 of rotavirus G1 in the Venezuelan population E. Vizzi 1 , O. Piñeros 1 , A. C. Alcala 1 , L. Naranjo 2 , J. A. Suarez 2 , F. Liprandi 1 1 Instituto Venezolano de Investigaciones Cientificas, Caracas, Miranda, Venezuela, 2 Instituto de Medicina Tropical , Caracas, Venezuela Background: G1 is the most widespread rotavirus type associated to acute gastroenteritis in children from many countries. Genetic and antigenic heterogeneity seem to be the reason for this consistent predominance of G1 serotype rotaviruses throughout the world over the years. Although studies previously conducted in Venezuela indicated a broad diversity in circulating rotavirus types, more recent data show that G1P[8] rotaviruses is the most widely circulating type since November 2007 in Caracas. In an attempt to investigate the impact of currently available vaccines, human rotavirus isolates obtained from clinical samples in Venezuelan cities over time and identified as G1P[8], were studied to acquire information about the pattern of genetic evolution of this type, and to understand the mechanisms of distribution and selection of rotavirus strains and lineages. Methods: Sequences of amplicons of 850 bp from VP7 rotavirus genes of one G1 strain isolated in Valencia during year 2003, and 3 strains obtained during the 2008 in Caracas were compared with the homologous regions of 43 reference G1 strains obtained from GenBank. Phylogenetic analysis was made using the neighbor-joining method. Results: VP7 gene analysis demonstrated that Venezuelan G1 rotavirus strains segregated in two different genetic lineages, with the three most recent isolates of 2008 clustering into lineage I and the strain of the 2003 into lineage II, the latter closely related to the recently introduced monovalent G1 Rotarix® vaccine. Analysis of deduced amino acid VP7 sequences of the three G1 rotavirus strains isolated during the 2008 revealed amino acid changes located on B (94SN) and E (217TM) regions. Conclusion: The increase in circulation of G1 rotaviruses observed in Caracas since November 2007 may be associated with the introduction of novel G1 strains that exhibited amino acid changes in antigenic regions involved in rotavirus neutralization. It is important to continue the surveillance to understand how these changes might affect the effectiveness of the vaccine.
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