The online version of this article (doi:10.1186/1475-2875-11-257) contains supplementary material, which is available to authorized users.
Jung-Yeon Kim, Hyung-Hwan Kim contributed equally to this work.
The authors declare that they have no competing interests.
TSK, JYK, and HWL conceived and designed the study as well as contributed to the execution of the research. HWL wrote the manuscript. HHK, SY, and HK contributed statistical analysis. TSK, BKN, JYK, and HWL collected the blood samples in the field. HWL and YJK performed IFAT. All authors have read and approved the final manuscript.
Plasmodium vivax re-emerged in 1993 and has now become a major public health problem during the summer season in South Korea. The aim of this study was to interpret and understand the meaning of seroepidemiological studies for developing the best malaria control programme in South Korea.
Blood samples were collected in Gimpo city, Paju city, Yeoncheon County, Cheorwon County and Goseong County of high risk area in South Korea. Microscopy was performed to identify patients infected with P. vivax. Antibody detection for P. vivax was performed using indirect fluorescent antibody test (IFAT).
A total of 1,574 blood samples was collected from participants in the study areas and evaluated against three parameters: IFAT positive rate, annual antibody positive index (AAPI), and annual parasite index (API). The IFAT positive rate was 7.24% (n = 114). Of the five study areas, Gimpo had the highest IFAT positive rate (13.68%) and AAPI (4.63). Yeongcheon had the highest API in 2005 (2.06) while Gimpo had the highest API in 2006 (5.00). No correlation was observed between any of the three parameters and study sites' distance from the demilitarized zone (DMZ).
These results showed that P. vivax antibody levels could provide useful information about the prevalence of malaria in endemic areas. Furthermore, AAPI results for each year showed a closer relationship to API the following year than the API of the same year and thus could be helpful in predicting malaria transmission risks.
Additional file 1: Positive rate and distribution of fluorescent antibody responses of sera by surveyed area.(PPT 240 KB)12936_2012_2219_MOESM1_ESM.ppt
Additional file 2: Positive rate of fluorescent antibody responses of sera in Gimpo surveyed area.(PPT 138 KB)12936_2012_2219_MOESM2_ESM.ppt
Additional file 3: Positive rate of fluorescent antibody responses of sera in Paju surveyed area.(PPT 140 KB)12936_2012_2219_MOESM3_ESM.ppt
Additional file 4: Positive rate of fluorescent antibody responses of sera in Yeoncheon surveyed area.(PPT 126 KB)12936_2012_2219_MOESM4_ESM.ppt
Additional file 5: Positive rate of fluorescent antibody responses of sera in Cheorwon surveyed area.(PPT 171 KB)12936_2012_2219_MOESM5_ESM.ppt
Additional file 6: Positive rate of fluorescent antibody responses of sera in Goseong surveyed area.(PPT 90 KB)12936_2012_2219_MOESM6_ESM.ppt
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- Estimating the malaria transmission of Plasmodium vivax based on serodiagnosis
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