Case Report
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H1N1 Encephalitis ‘Sans’ Flu – A Case Report

Year 2021, , 166 - 169, 15.09.2021
https://doi.org/10.5799/jmid.993996

Abstract

Influenza H1N1 infection is a viral infection with a seasonal preponderance, usually presents with flu-like symptoms, and rarely has extra-respiratory manifestations. It has taken a pandemic form on few occasions in the past. Involvement of the Central Nervous System (CNS), though rare, is described.
We describe a 42-year immunocompromised woman who presented with an acute febrile rapidly progressive encephalopathic illness without the usual flu-like symptoms. Instead, she had widespread Magnetic Resonance Imaging (MRI) brain changes resulting in a fatal outcome. Such an encephalitic presentation of H1N1 infection without respiratory involvement has never been reported. J Microbiol Infect Dis 2021; 11(3):166-169.

References

  • 1. Rothberg MB, Haessler SD. Complications of seasonal and pandemic influenza. Crit Care Med 2010; 38(4 Suppl): e91–97.
  • 2. Prerna A, Lim, JY, Tan NW, et al. Neurology of the H1N1 pandemic in Singapore: a nationwide case series of children and adults. J Neurovirol 2015; 21(5):491-499.
  • 3. Togashi T, Matsuzono Y, Narita M, et al. Influenza-associated acute encephalopathy in Japanese children in 1994-2002. Virus Res 2004; 103:75–78.
  • 4. Studahl M. Influenza virus and CNS manifestations. J Clin Virol 2003; 28:225–232.
  • 5. Toovey S. Influenza-associated central nervous system dysfunction: a literature review. Travel Med Infect Dis 2008; 6:114–124.
  • 6. Bengualid V and Berger J. Neurologic complications of acute influenza in adults: Case report and review of the literature. J Neurosci Clin Res 2017; 2:1.
  • 7. Devinder M, Arun K, Pratibha V, et al. Indian J Crit Care Med 2018; 22(5): 384–387. 8. Kimura S, Ohtuki N, Nezu A, Tanaka M, Takeshita S. Clinical and radiological variability of influenza-related encephalopathy or encephalitis. Acta Paediatr Jpn 1998; 40:264–270.
  • 9. Takanashi J, Barkovich AJ, Yamaguchi K, et al. Influenza-associated encephalitis/encephalopathy with a reversible lesion in the splenium of the corpus callosum: a case report and literature review. Am J Neuroradiol 2004; 25:798–802.
  • 10. Lyon JB, Remigio C, Milligan T, et al. Acute necrotizing encephalopathy in a child with H1N1 influenza infection. Pediatr Radiol 2010; 40:200–205.
Year 2021, , 166 - 169, 15.09.2021
https://doi.org/10.5799/jmid.993996

Abstract

References

  • 1. Rothberg MB, Haessler SD. Complications of seasonal and pandemic influenza. Crit Care Med 2010; 38(4 Suppl): e91–97.
  • 2. Prerna A, Lim, JY, Tan NW, et al. Neurology of the H1N1 pandemic in Singapore: a nationwide case series of children and adults. J Neurovirol 2015; 21(5):491-499.
  • 3. Togashi T, Matsuzono Y, Narita M, et al. Influenza-associated acute encephalopathy in Japanese children in 1994-2002. Virus Res 2004; 103:75–78.
  • 4. Studahl M. Influenza virus and CNS manifestations. J Clin Virol 2003; 28:225–232.
  • 5. Toovey S. Influenza-associated central nervous system dysfunction: a literature review. Travel Med Infect Dis 2008; 6:114–124.
  • 6. Bengualid V and Berger J. Neurologic complications of acute influenza in adults: Case report and review of the literature. J Neurosci Clin Res 2017; 2:1.
  • 7. Devinder M, Arun K, Pratibha V, et al. Indian J Crit Care Med 2018; 22(5): 384–387. 8. Kimura S, Ohtuki N, Nezu A, Tanaka M, Takeshita S. Clinical and radiological variability of influenza-related encephalopathy or encephalitis. Acta Paediatr Jpn 1998; 40:264–270.
  • 9. Takanashi J, Barkovich AJ, Yamaguchi K, et al. Influenza-associated encephalitis/encephalopathy with a reversible lesion in the splenium of the corpus callosum: a case report and literature review. Am J Neuroradiol 2004; 25:798–802.
  • 10. Lyon JB, Remigio C, Milligan T, et al. Acute necrotizing encephalopathy in a child with H1N1 influenza infection. Pediatr Radiol 2010; 40:200–205.
There are 9 citations in total.

Details

Primary Language English
Subjects Health Care Administration
Journal Section Case Report
Authors

Anup Halappanavar This is me

Subrat Kumar Nanda This is me

Faiz Mh Ahmad This is me

R Srınath This is me

Publication Date September 15, 2021
Published in Issue Year 2021

Cite

APA Halappanavar, A., Nanda, S. K., Ahmad, F. M., Srınath, R. (2021). H1N1 Encephalitis ‘Sans’ Flu – A Case Report. Journal of Microbiology and Infectious Diseases, 11(03), 166-169. https://doi.org/10.5799/jmid.993996
AMA Halappanavar A, Nanda SK, Ahmad FM, Srınath R. H1N1 Encephalitis ‘Sans’ Flu – A Case Report. J Microbil Infect Dis. September 2021;11(03):166-169. doi:10.5799/jmid.993996
Chicago Halappanavar, Anup, Subrat Kumar Nanda, Faiz Mh Ahmad, and R Srınath. “H1N1 Encephalitis ‘Sans’ Flu – A Case Report”. Journal of Microbiology and Infectious Diseases 11, no. 03 (September 2021): 166-69. https://doi.org/10.5799/jmid.993996.
EndNote Halappanavar A, Nanda SK, Ahmad FM, Srınath R (September 1, 2021) H1N1 Encephalitis ‘Sans’ Flu – A Case Report. Journal of Microbiology and Infectious Diseases 11 03 166–169.
IEEE A. Halappanavar, S. K. Nanda, F. M. Ahmad, and R. Srınath, “H1N1 Encephalitis ‘Sans’ Flu – A Case Report”, J Microbil Infect Dis, vol. 11, no. 03, pp. 166–169, 2021, doi: 10.5799/jmid.993996.
ISNAD Halappanavar, Anup et al. “H1N1 Encephalitis ‘Sans’ Flu – A Case Report”. Journal of Microbiology and Infectious Diseases 11/03 (September 2021), 166-169. https://doi.org/10.5799/jmid.993996.
JAMA Halappanavar A, Nanda SK, Ahmad FM, Srınath R. H1N1 Encephalitis ‘Sans’ Flu – A Case Report. J Microbil Infect Dis. 2021;11:166–169.
MLA Halappanavar, Anup et al. “H1N1 Encephalitis ‘Sans’ Flu – A Case Report”. Journal of Microbiology and Infectious Diseases, vol. 11, no. 03, 2021, pp. 166-9, doi:10.5799/jmid.993996.
Vancouver Halappanavar A, Nanda SK, Ahmad FM, Srınath R. H1N1 Encephalitis ‘Sans’ Flu – A Case Report. J Microbil Infect Dis. 2021;11(03):166-9.