Identification of Co-Circulating Dengue and South America–Origin Zika Viruses, Pakistan, 2021–2022

Najeeha T. Iqbal; Kaitlin Sawatzki; Kumail Ahmed; Jennifer Tisoncik-Go; Elise Smith; Kathleen Voss; John Corneliu; Lu Wang; Alicen B. Spaulding; Leonid Serebryannyy; Daniel C. Douek; Muhammad Asif Syed; Syed Faisal Mahmood; Erum Khan; Wesley C. Van Voorhis; Michael Gale

doi:10.3201/eid3108.250342

Identification of Co-Circulating Dengue and South America–Origin Zika Viruses, Pakistan, 2021–2022

Najeeha T. Iqbal, Kaitlin Sawatzki, Kumail Ahmed, Jennifer Tisoncik-Go, Elise Smith, Kathleen Voss, John Corneliu, Lu Wang, Alicen B. Spaulding, Leonid Serebryannyy, Daniel C. Douek, Muhammad Asif Syed, Syed Faisal Mahmood, Erum Khan, Wesley C. Van Voorhis, Michael Gale

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Abstract

We collected samples from febrile patients in Karachi, Pakistan, in 2021–2022. Sequencing, molecular, and serologic screens revealed dengue serotype 2 and Zika virus. The Zika lineage was inferred to be from Brazil in 2016, indicating unobserved circulation. We conclude that Zika virus contributes to perceived dengue outbreak burden in Pakistan.

Original language	English (US)
Pages (from-to)	1648-1651
Number of pages	4
Journal	Emerging Infectious Diseases
Volume	31
Issue number	8
DOIs	https://doi.org/10.3201/eid3108.250342
Publication status	Published - Aug 2025

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Iqbal, N. T., Sawatzki, K., Ahmed, K., Tisoncik-Go, J., Smith, E., Voss, K., Corneliu, J., Wang, L., Spaulding, A. B., Serebryannyy, L., Douek, D. C., Syed, M. A., Mahmood, S. F., Khan, E., Van Voorhis, W. C., & Gale, M. (2025). Identification of Co-Circulating Dengue and South America–Origin Zika Viruses, Pakistan, 2021–2022. Emerging Infectious Diseases, 31(8), 1648-1651. https://doi.org/10.3201/eid3108.250342

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title = "Identification of Co-Circulating Dengue and South America–Origin Zika Viruses, Pakistan, 2021–2022",

abstract = "We collected samples from febrile patients in Karachi, Pakistan, in 2021–2022. Sequencing, molecular, and serologic screens revealed dengue serotype 2 and Zika virus. The Zika lineage was inferred to be from Brazil in 2016, indicating unobserved circulation. We conclude that Zika virus contributes to perceived dengue outbreak burden in Pakistan.",

author = "Iqbal, \{Najeeha T.\} and Kaitlin Sawatzki and Kumail Ahmed and Jennifer Tisoncik-Go and Elise Smith and Kathleen Voss and John Corneliu and Lu Wang and Spaulding, \{Alicen B.\} and Leonid Serebryannyy and Douek, \{Daniel C.\} and Syed, \{Muhammad Asif\} and Mahmood, \{Syed Faisal\} and Erum Khan and \{Van Voorhis\}, \{Wesley C.\} and Michael Gale",

year = "2025",

month = aug,

doi = "10.3201/eid3108.250342",

language = "English (US)",

volume = "31",

pages = "1648--1651",

journal = "Emerging Infectious Diseases",

issn = "1080-6040",

publisher = "Centers for Disease Control and Prevention (CDC)",

number = "8",

}

Iqbal, NT, Sawatzki, K, Ahmed, K, Tisoncik-Go, J, Smith, E, Voss, K, Corneliu, J, Wang, L, Spaulding, AB, Serebryannyy, L, Douek, DC, Syed, MA, Mahmood, SF , Khan, E, Van Voorhis, WC & Gale, M 2025, 'Identification of Co-Circulating Dengue and South America–Origin Zika Viruses, Pakistan, 2021–2022', Emerging Infectious Diseases, vol. 31, no. 8, pp. 1648-1651. https://doi.org/10.3201/eid3108.250342

TY - JOUR

T1 - Identification of Co-Circulating Dengue and South America–Origin Zika Viruses, Pakistan, 2021–2022

AU - Iqbal, Najeeha T.

AU - Sawatzki, Kaitlin

AU - Ahmed, Kumail

AU - Tisoncik-Go, Jennifer

AU - Smith, Elise

AU - Voss, Kathleen

AU - Corneliu, John

AU - Wang, Lu

AU - Spaulding, Alicen B.

AU - Serebryannyy, Leonid

AU - Douek, Daniel C.

AU - Syed, Muhammad Asif

AU - Mahmood, Syed Faisal

AU - Khan, Erum

AU - Van Voorhis, Wesley C.

AU - Gale, Michael

PY - 2025/8

Y1 - 2025/8

N2 - We collected samples from febrile patients in Karachi, Pakistan, in 2021–2022. Sequencing, molecular, and serologic screens revealed dengue serotype 2 and Zika virus. The Zika lineage was inferred to be from Brazil in 2016, indicating unobserved circulation. We conclude that Zika virus contributes to perceived dengue outbreak burden in Pakistan.

AB - We collected samples from febrile patients in Karachi, Pakistan, in 2021–2022. Sequencing, molecular, and serologic screens revealed dengue serotype 2 and Zika virus. The Zika lineage was inferred to be from Brazil in 2016, indicating unobserved circulation. We conclude that Zika virus contributes to perceived dengue outbreak burden in Pakistan.

UR - https://www.scopus.com/pages/publications/105012317620

U2 - 10.3201/eid3108.250342

DO - 10.3201/eid3108.250342

M3 - Article

C2 - 40705419

AN - SCOPUS:105012317620

SN - 1080-6040

VL - 31

SP - 1648

EP - 1651

JO - Emerging Infectious Diseases

JF - Emerging Infectious Diseases

IS - 8

ER -

Identification of Co-Circulating Dengue and South America–Origin Zika Viruses, Pakistan, 2021–2022

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