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Volume 26, Number 10—October 2020
Dispatch

Silent Circulation of Rift Valley Fever in Humans, Botswana, 2013–2014

Claire E. Sanderson, Ferran Jori, Naazneen Moolla, Janusz T. Paweska, Nesredin Oumer, and Kathleen A. AlexanderComments to Author 
Author affiliations: Virginia Tech, Blacksburg, Virginia, USA, and Chobe Research Institute, Center for African Resources:; Communities, Animals, and Land Use, Kasane, Botswana (C.E. Sanderson, K.A. Alexander); Animals, Health, Territories, Risks, Ecosystems Unit, Université de Montpellier, Montpellier, France, and Botswana College of Agriculture, Gaborone, Botswana (F. Jori); National Institute of Communicable Diseases, Sandringham-Johannesburg, South Africa (N. Moolla, J.T. Paweska); University of the Witswatersrand, Johannesburg (J.T. Paweska); Botswana Ministry of Health, Gaborone (N. Oumer).

Main Article

Table 1

Percent of Rift Valley fever virus IgG-positive human serum samples by sex and age group, Botswana*

Age group Age, y Women
Men
Unknown
No. patients No. IgG positive 
(%, 95% CI) No. patients No. IgG positive
(%, 95% CI) No. patients No. IgG positive 
(%, 95% CI)
Child <12 15 0 (0, 0–20) 17 0 (0, 0–18) 2 0 (0, 0–66)
Adolescent 13–19 57 1 (2, 0–9) 9 0 (0, 0–30) 1 0 (0, 0–79)
Young adult 20–24 152 2 (1, 0–5) 26 1 (4, 1–19) 2 0 (0, 0–66)
Adult 25–44 538 24 (4, 3–7) 150 7 (5, 2–9) 25 0 (0, 0–13)
Middle-aged 45–64 78 7 (9, 4–17) 45 4 (9, 4–21) 4 1 (25, 5–70)
Aged 65–79 5 1 (20, 4–62) 10 5 (50, 24–76) 1 0 (0, 0–79)
Elderly >80 5 2 (40, 12–77) 3 2 (67, 21–94) 0 NA
Unknown
NA
11
1 (9, 2–38)

6
2 (33, 10–70)

114
5 (4, 2–10)
Total
861
38 (4, 3–6)

266
21 (9, 6–14)

149
6 (4, 2–9)
*NA, not applicable

Main Article

Page created: June 30, 2020
Page updated: September 17, 2020
Page reviewed: September 17, 2020
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