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Volume 6(6); December 2015
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Editorial
To Be Imported or to Be Endemic? That is the Question
Hae-Wol Cho, Chaeshin Chu
Osong Public Health Res Perspect. 2015;6(6):327-328.   Published online December 31, 2015
DOI: https://doi.org/10.1016/j.phrp.2015.11.006
  • 1,533 View
  • 17 Download
PDF
Original Articles
Assessment of Antisecretory, Gastroprotective, and In-vitro Antacid Potential of Daucus carota in Experimental Rats
Phool Chandra, Kamal Kishore, Ashoke Kumar Ghosh
Osong Public Health Res Perspect. 2015;6(6):329-335.   Published online December 31, 2015
DOI: https://doi.org/10.1016/j.phrp.2015.10.006
  • 1,622 View
  • 17 Download
  • 10 Citations
AbstractAbstract PDF
Objectives
In Indo China, carrots have been reported to regulate the functions of the stomach and intestines. The objective of the present investigation was to unravel the therapeutic potential of 50% ethanol extract from Daucus carota roots (EDC) on antisecretory, gastroprotective, and in vitro antacid capacity using experimental rats.
Methods
Assessment of EDC antisecretory and in vivo antacid capacities was carried out using a pyloric ligation induced ulcer model. The gastroprotective effect was assessed with an absolute ethanol induced ulcer model. The integrity of gastric mucosa was evaluated using the estimation of glutathione and gastric mucus level and with histopathological examination of gastric mucosal cells. The in-vitro antacid capacity was evaluated using a titration method. The effect of the extract on the liver was assessed by measuring serum biochemical parameters.
Results
The EDC significantly (p < 0.01–0.001) reduced gastric lesions in both models. Furthermore, the EDC also significantly (p < 0.05–0.001) reduced the volume of gastric content whereas the total acidity was significantly (p < 0.05–0.001) reduced with the doses of 100 mg/kg and 200 mg/kg EDC. Moreover, the mucus content and glutathione level increased significantly (p < 0.05) in the absolute alcohol-induced ulcer. The EDC also showed in-vitro antacid capacity. Histopathological studies further confirmed the potential of EDC by inhibiting congestion, edema, hemorrhage, and necrosis in gastric mucosa.
Conclusion
The EDC exerted antisecretory, gastroprotective, and in vitro antacid potential. These activities could be attributed due to the presence of glycosides, phenolics, tannins, alkaloids, and flavonoids.
Cloning, Expression, and Purification of Hyperthermophile α-Amylase from Pyrococcus woesei
Amir Ghasemi, Sobhan Ghafourian, Sedighe Vafaei, Reza Mohebi, Maryam Farzi, Morovat Taherikalani, Nourkhoda Sadeghifard
Osong Public Health Res Perspect. 2015;6(6):336-340.   Published online December 31, 2015
DOI: https://doi.org/10.1016/j.phrp.2015.10.003
  • 1,666 View
  • 20 Download
  • 3 Citations
AbstractAbstract PDF
Objectives
In an attempt α-amylase gene from Pyrococcus woesei was amplified and cloned into a pTYB2 vector to generate the recombinant plasmid pTY- α-amylase.
Methods
Escherichia coli BL21 used as a host and protein expression was applied using IPTG. SDS-PAGE assay demonstrated the 100 kDa protein. Amylolytic activity of proteins produced by transformed E. coli cells was detected by zymography, and the rate of active α-amylase with and without the intein tag in both soluble conditions and as inclusion bodies solubilized by 4M urea were measured.
Results
Amylolytic activity of ∼185,000 U/L of bacterial culture was observed from the soluble form of the protein using this system.
Conclusion
These results indicate that this expression system was appropriate for the production of thermostable α-amylase.
Epidemiological Characterization of Skin Fungal Infections Between the Years 2006 and 2010 in Korea
Sang-Ha Kim, Seung-Hak Cho, Seung-Ki Youn, Je-Seop Park, Jong Tae Choi, Young-Seok Bak, Young-Bin Yu, Young Kwon Kim
Osong Public Health Res Perspect. 2015;6(6):341-345.   Published online December 31, 2015
DOI: https://doi.org/10.1016/j.phrp.2015.10.012
  • 2,454 View
  • 22 Download
  • 9 Citations
AbstractAbstract PDF
Objectives
The purpose of this study was to build and provide a basic database of skin fungal infections for the effective management of skin fungal infections in the future.
Methods
We collected health insurance data between the years 2006 and 2010 from the Health Insurance Corporation (Seoul, Korea) and analyzed the data to determine the prevalence and treatment management of skin fungal infections.
Results
Skin fungal infections were divided into two groups: namely dermatophytosis and other superficial mycoses. Dermatophytosis showed a higher prevalence (16,035,399 cases) than the other superficial mycoses (794,847 cases) within the study period. The prevalence rate decreased consecutively by 0.01% to 0.19% every year. The prevalence according to region showed that Jeolla-do had a high prevalence distribution. The prevalences in men and women were similar (7.01% vs. 6.26%). It is interesting to note that adults from the 50–79-year age group showed a higher prevalence than children and young adults. The average convalescence time (days) of dermatophytosis was longer than that of other superficial mycoses. The total medical expenses were also much higher in dermatophytosis than in the other superficial mycoses.
Conclusion
This study provides useful data for study trends of skin fungal infections.
Prevalence of Head Lice Infestation and Its Associated Factors among Primary School Students in Iran: A Systematic Review and Meta-analysis
Mahmood Moosazadeh, Mahdi Afshari, Hormoz Keianian, Asghar Nezammahalleh, Ahmad Ali Enayati
Osong Public Health Res Perspect. 2015;6(6):346-356.   Published online December 31, 2015
DOI: https://doi.org/10.1016/j.phrp.2015.10.011
  • 2,062 View
  • 20 Download
  • 28 Citations
AbstractAbstract PDF
Objectives
Head lice infestation is one of the most important health problems, generally involving children aged 5–13 years. This study aims to estimate the prevalence of head lice infestation and its associated factors among primary school children using systematic review and meta-analysis methods.
Methods
Different national and international databases were searched for selecting the relevant studies using appropriate keywords, Medical Subject Heading terms, and references. Relevant studies with acceptable quality for meta-analysis were selected having excluded duplicate and irrelevant articles, quality assessment, and application of inclusion/exclusion criteria. With calculating standard errors according to binomial distribution and also considering the Cochrane's Q test as well as I-squared index for heterogeneity, pediculosis prevalence rate was estimated using Stata SE V.11 software.
Results
Forty studies met the inclusion criteria of this review and entered into the meta-analysis including 200,306 individuals. Using a random effect model, the prevalence (95% confidence interval) of head lice infestation among primary school children was estimated as 1.6% (1.2–2.05), 8.8% (7.6–9.9), and 7.4% (6.6–8.2) for boys, girls, and all the students, respectively. The infestation rate was found to be associated with low educational level of parents, long hair, family size, mother's job (housewife), father's job (worker/unemployed), using a common comb, lack of bathrooms in the house, and a low frequency of bathing.
Conclusion
This meta-analysis revealed that the prevalence of head lice infestation among Iranian primary school children is relatively high with more prevalence among girls. We also found that economic, social, cultural, behavioral, and hygienic factors are associated with this infestation.
Effect of Repeated Freezing and Thawing on Biomarker Stability in Plasma and Serum Samples
Jae-Eun Lee, Shine Young Kim, So-Youn Shin
Osong Public Health Res Perspect. 2015;6(6):357-362.   Published online December 31, 2015
DOI: https://doi.org/10.1016/j.phrp.2015.11.005
  • 1,798 View
  • 16 Download
  • 37 Citations
AbstractAbstract PDF
Objectives
The stability of circulating proteins can be affected by repeated freezing and thawing. The aim of our study was to identify the effect of repeated freezing and thawing on the plasma and serum concentrations of eight proteins [interferon-γ, interleukin (IL)-8, IL-15, IL-17A, matrix metalloproteinase (MMP)-7, tumor necrosis factor-α, vascular endothelial growth factor (VEGF), and VEGF receptor 2 (VEGF-R2)].
Methods
We assessed the concentration changes of these proteins in 30 plasma and serum samples subjected to three, four, or five freeze–thaw cycles, and compared these with the concentration changes in the samples that were subjected to two freeze–thaw cycles before analysis.
Results
Repeated freezing and thawing by up to five cycles did not modify the plasma and serum concentrations of interferon-γ, IL-8, and VEGF-R2, while levels of MMP-7, tumor necrosis factor-α, and VEGF were significantly changed in both plasma and serum samples. Moreover, MMP-7 and VEGF concentrations tended to increase with freeze–thaw cycles. They were more elevated in plasma samples (up to about 15%) than in serum samples (up to about 7%), suggesting that serum is the preferred sample type for the analysis of circulating proteins.
Conclusion
This is the first report on the effect of repeated freezing and thawing on plasma concentrations of MMP-7 and VEGF-R2. Our findings propose that researchers should consider the number of freeze–thaw cycles to select plasma or serum samples, depending on the type of analyte.
Brief Report
Imported Melioidosis in South Korea: A Case Series with a Literature Review
Seung Woo Kim, Geun-Yong Kwon, Bongyoung Kim, Donghyok Kwon, Jaeseung Shin, Geun-Ryang Bae
Osong Public Health Res Perspect. 2015;6(6):363-368.   Published online December 31, 2015
DOI: https://doi.org/10.1016/j.phrp.2015.10.014
  • 1,671 View
  • 17 Download
  • 10 Citations
AbstractAbstract PDF
Objectives
Melioidosis is a potentially fatal infectious disease caused by the environmental anaerobic Gram-negative bacillus Burkholderia pseudomallei. Melioidosis is endemic to areas of northern Australia and Southeast Asia. With increasing international travel and migration, imported cases of melioidosis are being reported regularly. Here, we summarize the 11 cases of melioidosis reported in South Korea from 2003 to 2014.
Methods
Tracing epidemiological investigations were performed on every patient reported to the National Surveillance System since 2011. A systematic literature search was performed to identify melioidosis cases that occurred prior to 2011.
Results
The overall fatality rate was 36.4%. All the patients had visited Southeast Asia where melioidosis is endemic. The stay in the endemic region ranged from 4 days to 20 years. Of the seven patients who developed initial symptoms after returning to South Korea, the time interval between returning to South Korea and symptom onset ranged from 1 day to 3 years. The remaining four patients developed symptoms during their stay in the endemic region and were diagnosed with melioidosis in South Korea. Seven (63.6%) patients possessed at least one risk factor, all of whom were diabetic. Pneumonia was the most frequent clinical manifestation, but the patients showed a wide spectrum of clinical features, including internal organ abscesses, a mycotic aneurysm of the aorta, and coinfection with tuberculosis.
Conclusion
An early diagnosis and initiation of the appropriate antibiotics can reduce the mortality of melioidosis. Consequently, increased awareness of the risk factors and clinical features of melioidosis is required.

PHRP : Osong Public Health and Research Perspectives