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Volume 23, Number 5—May 2017
Research Letter

Vertical Transmission of Zika Virus by Aedes aegypti and Ae. albopictus Mosquitoes

Alexander T. CiotaComments to Author , Sean M. Bialosuknia, Dylan J. Ehrbar, and Laura D. Kramer
Author affiliations: Wadsworth Center, New York State Department of Health, Slingerlands, New York, USA (A.T. Ciota, S.M. Bialosuknia, D.J. Ehrbar, L.D. Kramer); State University of New York, School of Public Health, Albany, New York, USA (A.T. Ciota, L.D. Kramer)

Main Article

Table

Vertical transmission of Zika virus in Aedes spp. mosquitoes*

Species/ population Zika virus strain Cycle Blood meal titer, log10 PFU/mL % Infected (diss)† Mean body titer, log10 PFU/mL Total no. pools No. individual mosquitoes dpi Zika virus positive FIR‡
(95% CI)
Ae. aegypti
Mexico ZIKV HND All§ 8.9 90.9 (95.0) 7.6 26 130 11–18 1 7.7
(0.5–36.9)
Argentina ZIKV HND All§ 9.3 100 (100) 6.6 28 136 11–38 2 14.9
(2.7–8.3)
Combined¶ ZIKV HND OV2 29 141 11–22 1 7.1
(0.4–4.0)
OV3 23 115 18–38 2 17.7
(3.2–57.2)
OV4 2 10 38 0 <94.6
(6.6–495.8)
Combined¶ ZIKV HND All§ 9.1# 95.5 (97.5) 7.4 54 266 11–38 3 11.5
(3.0–30.8)
Argentina ZIKV PR OV1 24 120 36–38 2 17.0
(3.1–54.8)
OV2 15 75 43–52 0 <13.3
(0.8–63.6)
OV3 4 18 60–62 0 <55.8
(3.4–262.5)
OV4 7 35 63 1 28.5
(1.7–34.8)
ZIKV PR All§ 9.1 100 (100) 7.7 50 248 36–63 3 12.3
(3.3–33)
Combined
 Combined**
 All§
 9.1#
 96.9 (98.3)
 7.5
 104
 514
 11–63
 6
 11.9
(4.9–4.6)
Ae. albopictus
New York ZIKV HND All§ 8.9 100 (93.3) 7.1 17 85 11–63 1 11.8
(0.7–56.2)

*Diss, disseminated; dpi, days post infection; FIR, filial infection rate; ZIKV HND, Zika virus Honduras 2016; OV, oviposition; ZIKV PR, Zika virus Puerto Rico.
†Percentage of infected with Zika virus–positive legs.
‡No. Zika virus positive/1,000 larvae.
§Combines data from all hatched eggs.
¶Data for both mosquito populations are combined.
#Mean titer.
**Data for both virus strains are combined.

Main Article

Page created: April 17, 2017
Page updated: April 17, 2017
Page reviewed: April 17, 2017
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.
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