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Emerg Infect Dis. 2016 Apr;22(4):598-607. doi: 10.3201/eid2204.151561.
Nosocomial Co-Transmission of Avian Influenza A(H7N9) and A(H1N1)pdm09 Viruses between 2 Patients with Hematologic Disorders.
Chen H, Liu S, Liu J, Chai C, Mao H, Yu Z, Tang Y, Zhu G, Chen HX, Zhu C, Shao H, Tan S, Wang Q, Bi Y, Zou Z, Liu G, Jin T, Jiang C, Gao GF, Peiris M, Yu H, Chen E.
Abstract
A nosocomial cluster induced by co-infections with avian influenza A(H7N9) and A(H1N1)pdm09 (pH1N1) viruses occurred in 2 patients at a hospital in Zhejiang Province, China, in January 2014. The index case-patient was a 57-year-old man with chronic lymphocytic leukemia who had been occupationally exposed to poultry. He had co-infection with H7N9 and pH1N1 viruses. A 71-year-old man with polycythemia vera who was in the same ward as the index case-patient for 6 days acquired infection with H7N9 and pH1N1 viruses. The incubation period for the second case-patient was estimated to be <4 days. Both case-patients died of multiple organ failure. Virus genetic sequences from the 2 case-patients were identical. Of 103 close contacts, none had acute respiratory symptoms; all were negative for H7N9 virus. Serum samples from both case-patients demonstrated strong proinflammatory cytokine secretion but incompetent protective immune responses. These findings strongly suggest limited nosocomial co-transmission of H7N9 and pH1N1 viruses from 1 immunocompromised patient to another.
KEYWORDS:
A(H1N1)pdm09; A(H1N1)pdm2009; H1N1; H7N9; chronic lymphocytic leukemia; cluster; co-infection; hematologic disorders; human-to-human transmission; immunocompromised; influenza; nosocomial transmission; pH1N1; pandemic; polycythemia vera; viruses; zoonoses
PMID: 26982379 [PubMed - in process] Free full text
Nosocomial Co-Transmission of Avian Influenza A(H7N9) and A(H1N1)pdm09 Viruses between 2 Patients with Hematologic Disorders.
Chen H, Liu S, Liu J, Chai C, Mao H, Yu Z, Tang Y, Zhu G, Chen HX, Zhu C, Shao H, Tan S, Wang Q, Bi Y, Zou Z, Liu G, Jin T, Jiang C, Gao GF, Peiris M, Yu H, Chen E.
Abstract
A nosocomial cluster induced by co-infections with avian influenza A(H7N9) and A(H1N1)pdm09 (pH1N1) viruses occurred in 2 patients at a hospital in Zhejiang Province, China, in January 2014. The index case-patient was a 57-year-old man with chronic lymphocytic leukemia who had been occupationally exposed to poultry. He had co-infection with H7N9 and pH1N1 viruses. A 71-year-old man with polycythemia vera who was in the same ward as the index case-patient for 6 days acquired infection with H7N9 and pH1N1 viruses. The incubation period for the second case-patient was estimated to be <4 days. Both case-patients died of multiple organ failure. Virus genetic sequences from the 2 case-patients were identical. Of 103 close contacts, none had acute respiratory symptoms; all were negative for H7N9 virus. Serum samples from both case-patients demonstrated strong proinflammatory cytokine secretion but incompetent protective immune responses. These findings strongly suggest limited nosocomial co-transmission of H7N9 and pH1N1 viruses from 1 immunocompromised patient to another.
KEYWORDS:
A(H1N1)pdm09; A(H1N1)pdm2009; H1N1; H7N9; chronic lymphocytic leukemia; cluster; co-infection; hematologic disorders; human-to-human transmission; immunocompromised; influenza; nosocomial transmission; pH1N1; pandemic; polycythemia vera; viruses; zoonoses
PMID: 26982379 [PubMed - in process] Free full text