1. Detection of the Influenza A(H1N1)pdm09 Virus Carrying the K-15E, P83S and Q293H Mutations in Patients Who Have Undergone Bone Marrow Transplant
- Author
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Juliana L. Abrantes, Carolina Q. Sacramento, Milene Mesquita, Thiago Moreno L. Souza, Marcelo Schirmer, Rita de Cássia Barbosa Tavares, Paola Cristina Resende, Viviane Machado, Marilda M. Siqueira, Natalia Fintelman-Rodrigues, and Andressa Marttorelli
- Subjects
Male ,Viral Diseases ,viruses ,DNA Mutational Analysis ,Cancer Treatment ,lcsh:Medicine ,Pathology and Laboratory Medicine ,medicine.disease_cause ,Severity of Illness Index ,Madin Darby Canine Kidney Cells ,Influenza A Virus, H1N1 Subtype ,Medicine and Health Sciences ,Blood and Lymphatic System Procedures ,Young adult ,lcsh:Science ,Child ,Phylogeny ,Bone Marrow Transplantation ,Mutation ,Multidisciplinary ,Hematology ,General Medicine ,Infectious Diseases ,Oncology ,Host-Pathogen Interactions ,Female ,Pathogens ,General Agricultural and Biological Sciences ,Research Article ,Adult ,Adolescent ,Virulence Factors ,Molecular Sequence Data ,Hemagglutinins, Viral ,Virulence ,Surgical and Invasive Medical Procedures ,Context (language use) ,Biology ,Microbiology ,Virus ,General Biochemistry, Genetics and Molecular Biology ,Immunocompromised Host ,Young Adult ,Dogs ,Virology ,Influenza, Human ,Severity of illness ,Genetics ,medicine ,Animals ,Humans ,Evolutionary Biology ,Polymorphism, Genetic ,lcsh:R ,Case-control study ,Biology and Life Sciences ,Cancer ,medicine.disease ,Influenza ,Case-Control Studies ,Immunology ,Genetic Polymorphism ,lcsh:Q ,Population Genetics ,Stem Cell Transplantation - Abstract
The 2009 pandemic influenza A(H1N1)pdm09 virus emerged and caused considerable morbidity and mortality in the third world, especially in Brazil. Although circulating strains of A(H1N1)pdm09 are A/California/04/2009-like (CA-04-like) viruses, various studies have suggested that some mutations in the viral hemagglutinin (HA) may be associated with enhanced severity and fatality. This phenomenon is particularly challenging for immunocompromised individuals, such as those who have undergone bone marrow transplant (BMT), because they are more likely to display worse clinical outcomes to influenza infection than non-immunocompromised individuals. We studied the clinical and viral aspects of post-BMT patients with confirmed A(H1N1)pdm09 diagnosis in the largest cancer hospital in Brazil. We found a viral strain with K-15E, P83S and Q293H polymorphisms in the HA, which is presumably more virulent, in these individuals. Despite that, these patients showed only mild symptoms of infection. Our findings complement the discovery of mild cases of infection with the A(H1N1)pdm09 virus with the K-15E, P83S and Q293H mutations in Brazil and oppose other studies that have linked these changes with increased disease severity. These results could be important for a better comprehension of the impact of the pandemic influenza in the context of BMT.
- Published
- 2014
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