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LETTERS TO THE EDITOR
Year : 2022  |  Volume : 25  |  Issue : 3  |  Page : 540-541
 

Apply the brighton criteria for diagnosing SARS-CoV-2 associated GBS despite pandemia-imminent restrictions


Neurology and Neurophysiology Center, Vienna, Austria

Date of Submission28-Aug-2021
Date of Acceptance27-Oct-2021
Date of Web Publication05-May-2022

Correspondence Address:
Josef Finsterer
Postfach 20, Vienna - 1180
Austria
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/aian.aian_775_21

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How to cite this article:
Finsterer J. Apply the brighton criteria for diagnosing SARS-CoV-2 associated GBS despite pandemia-imminent restrictions. Ann Indian Acad Neurol 2022;25:540-1

How to cite this URL:
Finsterer J. Apply the brighton criteria for diagnosing SARS-CoV-2 associated GBS despite pandemia-imminent restrictions. Ann Indian Acad Neurol [serial online] 2022 [cited 2022 Aug 9];25:540-1. Available from: https://www.annalsofian.org/text.asp?2022/25/3/540/344850




With interest we read the article by Dhamne et al.[1] about a multicentre, observational study of the clinical profile and outcome of SARS-CoV-2 associated Guillain--Barre syndrome (GBS) in 42 patients from the Indian state of Maharashtra collected between March 2020 and November 2020 by contacting all neurologists of the state. It was concluded that COVID-19 may be complicated by both para-infectious and post-infectious GBS, that para-infectious GBS needs more rigorous monitoring than post-infectious GBS, that para-infectious GBS profits from COVID-19 specific treatment, and that routine testing for SARS-CoV-2 should be implemented in the work-up of GBS cases.[1] The study is appealing but has several limitations which raise the following comments and concerns.

The first limitation of the study is that GBS was not diagnosed according to the Brighton criteria.[2] The Brighton criteria are currently accepted as the most appropriate criteria to diagnose GBS. They rely not only on the clinical assessment but also on cerebrospinal fluid (CSF) investigations and on nerve conduction studies (NCSs).

The Brighton criteria also request that alternative diagnoses explaining muscle weakness need to be excluded. However, it remains unclear how critical ill neuropathy or myopathy and other neuromuscular disorders were excluded if not all patients underwent NCS because of investigatory restrictions, as mentioned in the method section.[1]

A criterion to exclude patients from the study was a negative test for SARS-CoV-2. However, according to [Table 1], one patient of the para-infectious group tested negative for SARS-CoV-2 and he was also SARS-CoV-2 antibody negative. Thus, this patient should be excluded from the study according to the exclusion criteria. Likewise, one patient from the post-infectious subgroup tested negative for SARS-CoV-2 RNA and SARS-CoV-2 antibodies. Thus, also this patient should be excluded from the study.

SARS-CoV-2 infections are frequently complicated by involvement of the central nervous system (CNS).[3] We should be informed how weakness due to CNS involvement was excluded in the 42 included patients.

According to [Table 1], 21 patients of the para-infectious group received intravenous immunoglobulins (IVIG), one patient steroids, and three patients no therapy.[1] We should be told which treatment was applied to patient 26. According to [Table 1], 9 patients did not receive any treatment for GBS at all. We should know why 9 patients did not receive any treatment for GBS. Was this due to mild symptoms, spontaneous regression, refusal of therapy, or due to unavailability of treatment?

We do not agree with the notion that patients with para-infectious GBS also profit from specific COVID-19 therapy.[1] There is currently no evidence that remdesivir, favipiravir, tocilizumab, or reconvalescent plasma, are beneficial for GBS.[1] A beneficial effect of this specific COVID-19 treatment on GBS suggests that symptoms and signs that improved are rather attributable to COVID-19 than to GBS.

The delineation between para-infectious GBS and post-infectious GBS is artificial. Negative naso-pharyngeal swab PCR tests do not exclude that there is viremia, or that the virus can be confirmed in other body fluids or compartments. The pathophysiological mechanisms underlying either type of GBS are most likely the same.

Overall, the elegant study has several limitations which challenge the results and their interpretation. GBS should be diagnosed according to the Brighton criteria, delineation between post-infectious and para-infectious GBS should be avoided, and anti-COVID-19 drugs should not be used to treat SARS-CoV-2 associated GBS.

Ethics approval

The study was approved by the institutional review board.

Financial support and sponsorship

Nil.

Conflicts of interest

There are no conflicts of interest.



 
   References Top

1.
Dhamne MC, Benny R, Singh R, Pande A, Agarwal P, Wagh S, et al. Guillian--Barre' syndrome in patients with SARS-CoV-2: A multicentric study from Maharashtra, India. Ann Indian Acad Neurol 2021;24:339-46.  Back to cited text no. 1
  [Full text]  
2.
Choe YJ, Cho H, Bae GR, Lee JK. Guillain-Barré syndrome following receipt of influenza A (H1N1) 2009 monovalent vaccine in Korea with an emphasis on Brighton collaboration case definition. Vaccine 2011;29:2066-70.  Back to cited text no. 2
    
3.
Merino JJ, Macho-González A, Benedi J, González MP. Neurological manifestations of COVID-19 in patients: From path physiology to therapy. Neurol Sci 2021;1-13. doi: 10.1007/s10072-021-05505-7. Online ahead of print.  Back to cited text no. 3
    




 

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