1.Risk factors for lesions of the knee menisci among workers in South Korea’s national parks.
Donghee SHIN ; Kanwoo YOUN ; Eunja LEE ; Myeongjun LEE ; Hweemin CHUNG ; Deokweon KIM
Annals of Occupational and Environmental Medicine 2016;28(1):56-
BACKGROUND: This study was designed to investigate the prevalence of the menisci lesions in national park workers and work factors affecting this prevalence. METHODS: The study subjects were 698 workers who worked in 20 Korean national parks in 2014. An orthopedist visited each national park and performed physical examinations. Knee MRI was performed if the McMurray test or Apley test was positive and there was a complaint of pain in knee area. An orthopedist and a radiologist respectively read these images of the menisci using a grading system based on the MRI signals. To calculate the cumulative intensity of trekking of the workers, the mean trail distance, the difficulty of the trail, the tenure at each national parks, and the number of treks per month for each worker from the start of work until the present were investigated. Chi-square tests was performed to see if there were differences in the menisci lesions grade according to the variables. The variables used in the Chi-square test were evaluated using simple logistic regression analysis to get crude odds ratios, and adjusted odds ratios and 95 % confidence intervals were calculated using multivariate logistic regression analysis after establishing three different models according to the adjusted variables. RESULTS: According to the MRI signal grades of menisci, 29 % were grade 0, 11.3 % were grade 1, 46.0 % were grade 2, and 13.7 % were grade 3. The differences in the MRI signal grades of menisci according to age and the intensity of trekking as calculated by the three different methods were statistically significant. Multiple logistic regression analysis was performed for three models. In model 1, there was no statistically significant factor affecting the menisci lesions. In model 2, among the factors affecting the menisci lesions, the OR of a high cumulative intensity of trekking was 4.08 (95 % CI 1.00–16.61), and in model 3, the OR of a high cumulative intensity of trekking was 5.84 (95 % CI 1.09–31.26). CONCLUSION: The factor that most affected the menisci lesions among the workers in Korean national park was a high cumulative intensity of trekking.
Knee*
;
Logistic Models
;
Magnetic Resonance Imaging
;
Odds Ratio
;
Parks, Recreational*
;
Physical Examination
;
Prevalence
;
Risk Factors*
2.Molecular and Morphologic Identification of Spirometra ranarum Found in the Stool of African Lion, Panthera leo in the Serengeti Plain of Tanzania
Keeseon S EOM ; Hansol PARK ; Dongmin LEE ; Seongjun CHOE ; Yeseul KANG ; Mohammed Mebarek BIA ; Sang Hwa LEE ; Julius KEYYU ; Robert FYUMAGWA ; Hyeong Kyu JEON
The Korean Journal of Parasitology 2018;56(4):379-383
The present study was performed with morphological and molecular analysis (cox1 and nad1 mitochondrial genes) to identify the proglottids of spirometrid tapeworm found in the stool of an African lion, Panthera leo, in the Serengeti plain of Tanzania. A strand of tapeworm strobila, about 75 cm in length, was obtained in the stool of a male African lion in the Serengeti National Park (34° 50′ E, 02° 30′ S), Tanzania, in February 2012. The morphological features of the adult worm examined exhibited 3 uterine coils with a bow tie appearance and adopted a diagonal direction in the second turn. The posterior uterine coils are larger than terminal uterine ball and the feature of uteri are swirling rather than spirally coiling. The sequence difference between the Spirometra species (Tanzania origin) and S. erinaceieuropaei (GenBank no. KJ599680) was 9.4% while those of S. decipiens (GenBank no. KJ599679) differed by 2.1% in the cox1 and nad1 genes. Phylogenetic tree topologies generated using the 2 analytic methods were identical and presented high level of confidence values for the 3 major branches of the 3 Spirometra species in the cox1 gene. The morphological and molecular findings obtained in this study were nearly coincided with those of S. ranarum. Therefore, we can know for the first time that the African lion, Panthera leo, is to the definitive host of this tapeworm.
Adult
;
Cestoda
;
Humans
;
Lions
;
Male
;
Panthera
;
Parks, Recreational
;
Spirometra
;
Tanzania
;
Trees
;
Uterus
3.Diversity of Wood-Inhabiting Polyporoid and Corticioid Fungi in Odaesan National Park, Korea.
Yeongseon JANG ; Seokyoon JANG ; Jaejung LEE ; Hanbyul LEE ; Young Woon LIM ; Changmu KIM ; Jae Jin KIM
Mycobiology 2016;44(4):217-236
Polyporoid and corticioid fungi are among the most important wood-decay fungi. Not only do they contribute to nutrient cycling by decomposing wood debris, but they are also valuable sources for natural products. Polyporoid and corticioid wood-inhabiting fungi were investigated in Odaesan National Park. Fruit bodies were collected and identified based on morphological and molecular analyses using 28S and internal transcribed spacer regions of DNA sequences. As a result, a total of 149 species, 69 genera, 22 families, and 11 orders were recognized. Half (74 species) of the species were polypores, and the other half (75 species) were corticioid fungi. Most of the species belonged to Polyporales (92 species) followed by Hymenochaetales (33 species) and Russulales (11 species). At the genus level, a high number of species was observed from Steccherinum, Hyphodontia, Phanerochaete, Postia, and Trametes. Concerning distribution, almost all the species could be found below 1,000 m, and only 20% of the species were observed from above 1,000 m. Stereum subtomentosum, Trametes versicolor, T. hirsuta, T. pubescens, Bjerkandera adusta, and Ganoderma applanatum had wide distribution areas. Deciduous wood was the preferred substrate for the collected species. Sixty-three species were new to this region, and 21 species were new to Korea, of which 17 species were described and illustrated.
Base Sequence
;
Biological Products
;
Classification
;
Coriolaceae
;
Fruit
;
Fungi*
;
Ganoderma
;
Humans
;
Korea*
;
Parks, Recreational*
;
Phanerochaete
;
Polyporales
;
Trametes
;
Wood
5.Association of Residential Greenness with the Prevalence of Metabolic Syndrome in a Rural Chinese Population: the Henan Rural Cohort Study.
Ya Ling HE ; Xiao Tian LIU ; Run Qi TU ; Ming Ming PAN ; Miao Miao NIU ; Gong Bo CHEN ; Jian HOU ; Zhen Xing MAO ; Wen Qian HUO ; Shan Shan LI ; Yu Ming GUO ; Chong Jian WANG
Biomedical and Environmental Sciences 2022;35(1):89-94