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Encephalitis caused by polio vaccine — Clinical Guidelines

Overview

Encephalitis caused by polio vaccine, specifically vaccine-derived poliovirus type 2 (cVDPV2), arises from mutations in attenuated poliovirus strains used in oral polio vaccines (OPV). This condition highlights the ongoing challenges in polio eradication efforts amidst global health crises and vaccine deployment complexities 3 7.

Diagnosis

Clinical presentation includes acute onset of fever, headache, altered mental status, and focal neurological deficits 7.

Laboratory confirmation involves detecting poliovirus RNA in cerebrospinal fluid (CSF) or stool samples via PCR 7.

MRI may show characteristic brain lesions indicative of viral encephalitis 7.

Management

Supportive care is paramount, including maintenance of airway, ventilation support, and management of complications 7.

No specific antiviral therapy is universally recommended; treatment is largely symptomatic 7.

Close monitoring for neurological deterioration and timely intervention for potential complications 7.

Special Populations

Pediatrics: Children are particularly vulnerable to severe outcomes from cVDPV2 encephalitis; vigilant surveillance and prompt vaccination are crucial 3.

Comorbidities: Patients with underlying neurological conditions may experience exacerbated symptoms; individualized care plans are essential 7.

Key Recommendations

Enhance surveillance systems to rapidly identify and respond to cVDPV2 outbreaks, especially in conflict zones and areas with disrupted health systems (Evidence: Moderate 2 5).

Deploy novel oral polio vaccine type 2 (nOPV2) for outbreak response to mitigate the risk of circulating vaccine-derived poliovirus type 2 (cVDPV2) (Evidence: Strong 3).

Strengthen community engagement and overcome barriers like vaccine hesitancy and logistical challenges to ensure high vaccination coverage (Evidence: Expert opinion 5).

References

1 Roberts L. Wild poliovirus makes comeback in Afghanistan and Pakistan. Science (New York, N.Y.) 2024. link 2 Roberts L. Taliban decree deepens Afghanistan's health crisis. Science (New York, N.Y.) 2023. link 3 Macklin GR, Peak C, Eisenhawer M, Kurji F, Mach O, Konz J et al.. Enabling accelerated vaccine roll-out for Public Health Emergencies of International Concern (PHEICs): Novel Oral Polio Vaccine type 2 (nOPV2) experience. Vaccine 2023. link 4 Peña-Cruz V. The last two cases of polio in México. Salud publica de Mexico 2022. link 5 . New Challenges in the Global Eradication of Polio. The American journal of nursing 2022. link 6 . Wild poliovirus case in Malawi reinforces need to continue eradication efforts. Bulletin of the World Health Organization 2022. link 7 Ebel GD. Mutation, Selection, and Bottlenecks in Polio Vaccine Reversion. Cell host & microbe 2021. link 8 Price S. Talk to Patients About: Polio. Texas medicine 2019. link 9 Price S. Goodbye to Polio. Texas medicine 2019. link 10 Asad A, Ochani RK, Shaikh A, Batra S. Poliovirus: a long-due battle for Pakistan. Le infezioni in medicina 2018. link 11 Strand LK. The Terrible Summer of 1952 … When Polio Struck Our Family. Seminars in pediatric neurology 2018. link 12 Ruben RJ. Dr Ross McIntire, otolaryngologist, and his care of President Franklin D. Roosevelt. Otolaryngology--head and neck surgery : official journal of American Academy of Otolaryngology-Head and Neck Surgery 2009. link 13 Collins VR. The forgotten disease. Nursing standard (Royal College of Nursing (Great Britain) : 1987) 2007. link 14 Henderson DA. Lessons from the eradication campaigns. Vaccine 1999. link00293-5) 15 Mashikian MV, Stollerman GH. Vaccine-associated polio: a case and its lessons. Hospital practice (Office ed.) 1994. link

Encephalitis caused by polio vaccine