tetano
Editor, Senior Moderator
Influenza Other Respi Viruses. 2011 Mar;5(2):123-134. doi: 10.1111/j.1750-2659.2010.00182.x. Epub 2010 Nov 3.
Influenza and other respiratory viruses in three Central American countries.
Laguna-Torres VA, S?nchez-Largaespada JF, Lorenzana I, Forshey B, Aguilar P, Jimenez M, Parrales E, Rodriguez F, Garc?a J, Jimenez I, Rivera M, Perez J, Sovero M, Rios J, Gamero ME, Halsey ES, Kochel TJ.
US Naval Medical Research Center Detachment, Lima, Per?. Hospital Infantil Manuel de Jes?s Rivera "La Mascota", Managua. Ministerio de Salud de Nicaragua. Universidad Nacional ut?noma de Honduras, Tegucigalpa, Honduras. Hospital de Santa Ana, Metap?n. Ministerio de Salud de El Salvador, El Salvador. Centro de Salud Villa Libertad/Villa Venezuela, Managua. Ministerio de Salud de Nicaragua. Hospital Humberto Alvarado V?squez, Masaya. Ministerio de Salud de Nicaragua. Instituto Hondure?o de Seguridad Social, Tegucigalpa, Honduras.
Abstract
Please cite this paper as: Laguna-Torres et al. (2011) Influenza and other respiratory viruses in three Central American countries. Influenza and Other Respiratory Viruses 5(2), 123-134. Background Despite the disease burden imposed by respiratory diseases on children in Central America, there is a paucity of data describing the etiologic agents of the disease. Aims To analyze viral etiologic agents associated with influenza-like illness (ILI) in participants reporting to one outpatient health center, one pediatric hospital, and three general hospitals in El Salvador, Honduras, and Nicaragua Material & Methods Between August 2006 and April 2009, pharyngeal swabs were collected from outpatients and inpatients. Patient specimens were inoculated onto cultured cell monolayers, and viral antigens were detected by indirect and direct immunofluorescence staining. Results A total of 1,756 patients were enrolled, of whom 1,195 (68.3%) were under the age of 5; and 183 (10.4%) required hospitalization. One or more viral agents were identified in 434 (24.7%) cases, of which 17 (3.9%) were dual infections. The most common viruses isolated were influenza A virus (130; 7.4% of cases), respiratory syncytial virus (122; 6.9%), adenoviruses (63; 3.6%), parainfluenza viruses (57; 3.2%), influenza B virus (47; 2.7% of cases), and herpes simplex virus 1 (22; 1.3%). In addition, human metapneumovirus and enteroviruses (coxsackie and echovirus) were isolated from patient specimens. Discussion When compared to the rest of the population, viruses were isolated from a significantly higher percentage of patients age 5 or younger. The prevalence of influenza A virus or influenza B virus infections was similar between the younger and older age groups. RSV was the most commonly detected pathogen in infants age 5 and younger and was significantly associated with pneumonia (p < 0.0001) and hospitalization (p < 0.0001). Conclusion Genetic analysis of influenza isolates identified A (H3N2), A (H1N1), and B viruses. It also showed that the mutation H274Y conferring resistance to oseltamivir was first detected in Honduran influenza A/H1N1 strains at the beginning of 2008. These data demonstrate that a diverse range of respiratory pathogens are associated with ILI in Honduras, El Salvador, and Nicaragua. RSV infection in particular appears to be associated with severe disease in infants in the region.
? 2010 Blackwell Publishing Ltd.
PMID: 21306576 [PubMed - as supplied by publisher]
http://www.ncbi.nlm.nih.gov/pubmed/21306576
Influenza and other respiratory viruses in three Central American countries.
Laguna-Torres VA, S?nchez-Largaespada JF, Lorenzana I, Forshey B, Aguilar P, Jimenez M, Parrales E, Rodriguez F, Garc?a J, Jimenez I, Rivera M, Perez J, Sovero M, Rios J, Gamero ME, Halsey ES, Kochel TJ.
US Naval Medical Research Center Detachment, Lima, Per?. Hospital Infantil Manuel de Jes?s Rivera "La Mascota", Managua. Ministerio de Salud de Nicaragua. Universidad Nacional ut?noma de Honduras, Tegucigalpa, Honduras. Hospital de Santa Ana, Metap?n. Ministerio de Salud de El Salvador, El Salvador. Centro de Salud Villa Libertad/Villa Venezuela, Managua. Ministerio de Salud de Nicaragua. Hospital Humberto Alvarado V?squez, Masaya. Ministerio de Salud de Nicaragua. Instituto Hondure?o de Seguridad Social, Tegucigalpa, Honduras.
Abstract
Please cite this paper as: Laguna-Torres et al. (2011) Influenza and other respiratory viruses in three Central American countries. Influenza and Other Respiratory Viruses 5(2), 123-134. Background Despite the disease burden imposed by respiratory diseases on children in Central America, there is a paucity of data describing the etiologic agents of the disease. Aims To analyze viral etiologic agents associated with influenza-like illness (ILI) in participants reporting to one outpatient health center, one pediatric hospital, and three general hospitals in El Salvador, Honduras, and Nicaragua Material & Methods Between August 2006 and April 2009, pharyngeal swabs were collected from outpatients and inpatients. Patient specimens were inoculated onto cultured cell monolayers, and viral antigens were detected by indirect and direct immunofluorescence staining. Results A total of 1,756 patients were enrolled, of whom 1,195 (68.3%) were under the age of 5; and 183 (10.4%) required hospitalization. One or more viral agents were identified in 434 (24.7%) cases, of which 17 (3.9%) were dual infections. The most common viruses isolated were influenza A virus (130; 7.4% of cases), respiratory syncytial virus (122; 6.9%), adenoviruses (63; 3.6%), parainfluenza viruses (57; 3.2%), influenza B virus (47; 2.7% of cases), and herpes simplex virus 1 (22; 1.3%). In addition, human metapneumovirus and enteroviruses (coxsackie and echovirus) were isolated from patient specimens. Discussion When compared to the rest of the population, viruses were isolated from a significantly higher percentage of patients age 5 or younger. The prevalence of influenza A virus or influenza B virus infections was similar between the younger and older age groups. RSV was the most commonly detected pathogen in infants age 5 and younger and was significantly associated with pneumonia (p < 0.0001) and hospitalization (p < 0.0001). Conclusion Genetic analysis of influenza isolates identified A (H3N2), A (H1N1), and B viruses. It also showed that the mutation H274Y conferring resistance to oseltamivir was first detected in Honduran influenza A/H1N1 strains at the beginning of 2008. These data demonstrate that a diverse range of respiratory pathogens are associated with ILI in Honduras, El Salvador, and Nicaragua. RSV infection in particular appears to be associated with severe disease in infants in the region.
? 2010 Blackwell Publishing Ltd.
PMID: 21306576 [PubMed - as supplied by publisher]
http://www.ncbi.nlm.nih.gov/pubmed/21306576