Paralysis Case and Contact Spread of Vaccine-derived Poliovirus in Spain
Author Information
Author(s): Avellón Ana, Cabrerizo Maria, de Miguel Teresa, Pérez-Breña Pilar, Tenorio Antonio, Pérez Jose Luis, Martínez de Aragón Maria Victoria, Trallero Gloria
Primary Institution: Instituto de Salud Carlos III National Centre of Microbiology, Madrid, Spain
Hypothesis
Can vaccine-derived polioviruses spread and cause paralysis in immunocompetent individuals?
Conclusion
The study highlights the risk of vaccine-derived polioviruses causing paralysis in immunocompromised individuals and spreading to contacts.
Supporting Evidence
- Vaccine-derived polioviruses can replicate in immunocompromised individuals and cause paralysis.
- The patient had a high viral load, which decreased after immunoglobulin therapy.
- Three family contacts were found to shed the virus, indicating potential spread.
Takeaway
A boy in Spain got sick from a virus that came from a vaccine, and it spread to some of his family members.
Methodology
The study involved monitoring a patient with paralysis, analyzing stool samples, and conducting environmental surveillance.
Limitations
Technical problems delayed sewage sampling, which may have affected the detection of viruses.
Participant Demographics
The main participant was a 14-month-old boy with immunodeficiency, and family contacts included two brothers aged 11 and 13.
Digital Object Identifier (DOI)
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