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. 2016 Oct;22(10):1712-9.
doi: 10.3201/eid2210.151071.

Vaccine-Derived Polioviruses and Children with Primary Immunodeficiency, Iran, 1995-2014

Mohammadreza Shaghaghi, Shohreh Shahmahmoodi, Hassan Abolhassani, Saeed Soleyman-Jahi, Leila Parvaneh, Sussan Mahmoudi, Zahra Chavoshzadeh, Reza Yazdani, Seyed Mohsen Zahraei, Mohsen Ebrahimi, Mohammad H Eslamian, Hamideh Tabatabaie, Maryam Yousefi, Yaghoob M Kandelousi, Aliasghar Oujaghlou, Nima Rezaei, Asghar Aghamohammadi

Vaccine-Derived Polioviruses and Children with Primary Immunodeficiency, Iran, 1995-2014

Mohammadreza Shaghaghi et al. Emerg Infect Dis. 2016 Oct.

Abstract

Widespread use of oral poliovirus vaccine has led to an ≈99.9% decrease in global incidence of poliomyelitis (from ≈350,000 cases in 1988 to 74 cases in 2015) and eradication of wild-type poliovirus serotypes 2 and 3. However, patients with primary immunodeficiency might shed vaccine-derived polioviruses (VDPVs) for an extended period, which could pose a major threat to polio eradication programs. Since 1995, sixteen VDPV populations have been isolated from 14 patients with immunodeficiency in Iran. For these patients, vaccine-associated paralysis, mostly in >1 extremity, was the first manifestation of primary immunodeficiency. Seven patients with humoral immunodeficiency cleared VDPV infection more frequently than did 6 patients with combined immunodeficiencies. Our results raise questions about manifestations of VDPVs in immunodeficient patients and the role of cellular immunity against enterovirus infections. On the basis of an association between VDPVs and immunodeficiency, we advocate screening of patients with primary immunodeficiency for shedding of polioviruses.

Keywords: Iran; children; polio; poliomyelitis; poliovirus; primary immunodeficiency; vaccination; vaccine-derived poliovirus; viruses.

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Figure
Figure
Poliomyelitis cases in Iran, 1995–2014. WPV, wild-type polioviruses; VDPV, vaccine-derived polioviruses.
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