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Volume 17, Number 8—August 2011

Letter

Saffold Virus Infection in Children, Malaysia, 2009

Kaw Bing Chua, Kenny Voon, Meng Yu, Wan Nor Azlina Wan Ali, Abdul Rasid Kasri, and Lin-Fa WangComments to Author 
Author affiliations: Author affiliations: National Public Health Laboratory, Sungai Buloh, Selangor, Malaysia (K.B. Chua, W.N.A.W. Ali, A.R. Kasri); International Medical University, Bukit Jalil, Kuala Lumpur, Malaysia (K.B. Chua, K. Voon); Australian Animal Health Laboratory, Geelong, Victoria, Australia (M. Yu, L.-F. Wang)

Main Article

Table

Prevalence of SAFV-specific IgG in serum from children 10–12 years of age, by sex, Malaysia, 2009*

State of residence No. children No. positive serum samples†
+ ++ +++ Total no. (%)
Penang
M 40 21 7 0 28 (70.0)
F 40 19 5 2 26 (65.0)
Total
80
40
12
2
54 (67.5)
Kelantan
M 40 16 8 5 29 (72.5)
F 40 18 11 2 31 (77.5)
Total
80
34
19
7
60 (75.0)
Selangor
M 40 16 11 5 32 (80.0)
F 40 22 5 0 27 (67.5)
Total
80
38
16
5
59 (73.8)
Sabah
M 40 16 9 4 29 (72.5)
F 40 24 6 1 31 (77.5)
Total
80
40
15
5
60 (75.0)
Sarawak
M 40 22 6 3 31 (77.5)
F 40 19 5 4 28 (70.0)
Total 80 41 11 7 59 (73.8)

*SAFV, Saffold virus; Ig, immunoglobulin
†The degree of positive reactivity was classified into 3 groups: weak (titer <0–40), medium (titer 80–160), and strong (titer 320–1,280) according to the staining intensity on SAFV-infected Vero cells (data not shown). The classification was further confirmed by correlation with virus neutralizing titer from 20 samples in each group, with + samples having a titer of 0–40, ++ samples 80–160, and +++ samples 320–1,280, respectively.

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