1.The 2013-2015 Ebola outbreak in West Africa.
Ji Hoon KANG ; Weon Young CHANG ; Sungwook CHOI ; Joseph RHO ; Keun Hwa LEE
Journal of Bacteriology and Virology 2015;45(4):304-313
Zaire Ebola virus (EBOV) is a fatal human pathogen, with a high case fatality rate (CFR) averaging up to 78%. In March 2014, the World Health Organization (WHO) was made aware of a ZEBOV outbreak in rural Guinea, West Africa. Epidemiologic investigation linked the clinical and laboratory confirmed cases with the presumed first fatality of the outbreak in December 2013. EBOV from Guinea is a separate clade from other ZEBOV strains reported from the Democratic Republic of Congo (DRC) and Gabon. Since the outbreak in March, ZEBOV was also reported in Conakry, Guinea's capital and spread to other neighboring countries. In its largest outbreak, ZEBOV disease expanded through Guinea, Liberia, Sierra Leone, and Nigeria and to Spain, the USA, and the UK. The WHO declared the 2013-2015 West African Ebola epidemic a public health emergency of international concern considering its presumable capacity for further international spread. Early manifestations of EVD (Ebola virus disease) include a high fever, body aches, malaise, and fatigue. Severe diarrhea and other gastrointestinal manifestations such as vomiting were common, while bleeding was a more sporadic finding. The fatality rate was 43% and highest in patients aged > or = 45 years and the overall fitted mean incubation period was 10.3 days (95% CI 9.9~10.7). We present a review of the literature on the emergence of Ebola, and the epidemiologic, clinical, and laboratory records of patients in whom EVD was diagnosed in Sierra Leone, Guinea, Liberia, Mali, the USA, and Spain, its zoonotic origin, and the transmission of ZEBOV, as well as presenting original literature on the current Ebola outbreak.
Africa, Western*
;
Congo
;
Diarrhea
;
Ebolavirus
;
Emergencies
;
Epidemiology
;
Fatigue
;
Fever
;
Gabon
;
Guinea
;
Hemorrhage
;
Humans
;
Liberia
;
Mali
;
Mortality
;
Nigeria
;
Public Health
;
Sierra Leone
;
Spain
;
Vomiting
;
World Health Organization
2.High Genetic Variability of Schistosoma haematobium in Mali and Nigeria.
Charles EZEH ; Mingbo YIN ; Hongyan LI ; Ting ZHANG ; Bin XU ; Moussa SACKO ; Zheng FENG ; Wei HU
The Korean Journal of Parasitology 2015;53(1):129-134
Schistosoma haematobium is one of the most prevalent parasitic flatworms, infecting over 112 million people in Africa. However, little is known about the genetic diversity of natural S. haematobium populations from the human host because of the inaccessible location of adult worms in the host. We used 4 microsatellite loci to genotype individually pooled S. haematobium eggs directly from each patient sampled at 4 endemic locations in Africa. We found that the average allele number of individuals from Mali was significantly higher than that from Nigeria. In addition, no significant difference in allelic composition was detected among the populations within Nigeria; however, the allelic composition was significantly different between Mali and Nigeria populations. This study demonstrated a high level of genetic variability of S. haematobium in the populations from Mali and Nigeria, the 2 major African endemic countries, suggesting that geographical population differentiation may occur in the regions.
Adolescent
;
Animals
;
Child
;
Female
;
*Genetic Variation
;
Genotype
;
Humans
;
Male
;
Mali
;
Microsatellite Repeats
;
Nigeria
;
Schistosoma haematobium/*classification/*genetics/isolation & purification
;
Schistosomiasis haematobia/*parasitology
3.High Genetic Variability of Schistosoma haematobium in Mali and Nigeria.
Charles EZEH ; Mingbo YIN ; Hongyan LI ; Ting ZHANG ; Bin XU ; Moussa SACKO ; Zheng FENG ; Wei HU
The Korean Journal of Parasitology 2015;53(1):129-134
Schistosoma haematobium is one of the most prevalent parasitic flatworms, infecting over 112 million people in Africa. However, little is known about the genetic diversity of natural S. haematobium populations from the human host because of the inaccessible location of adult worms in the host. We used 4 microsatellite loci to genotype individually pooled S. haematobium eggs directly from each patient sampled at 4 endemic locations in Africa. We found that the average allele number of individuals from Mali was significantly higher than that from Nigeria. In addition, no significant difference in allelic composition was detected among the populations within Nigeria; however, the allelic composition was significantly different between Mali and Nigeria populations. This study demonstrated a high level of genetic variability of S. haematobium in the populations from Mali and Nigeria, the 2 major African endemic countries, suggesting that geographical population differentiation may occur in the regions.
Adolescent
;
Animals
;
Child
;
Female
;
*Genetic Variation
;
Genotype
;
Humans
;
Male
;
Mali
;
Microsatellite Repeats
;
Nigeria
;
Schistosoma haematobium/*classification/*genetics/isolation & purification
;
Schistosomiasis haematobia/*parasitology
4.Furfural from Pine Needle Extract Inhibits the Growth of a Plant Pathogenic Fungus, Alternaria mali.
Kyung Hwan JUNG ; Sun Kyun YOO ; Sung Kwon MOON ; Ung Soo LEE
Mycobiology 2007;35(1):39-43
The antifungal effect of pine needle extract prepared by a distinguishable extraction method and the dry distillation method, was examined. The effect of this extract itself was insignificant. The chemical components of pine needle extract were then investigated by gas chromatographic analysis, and four chemical components, acetol, furfural, 5-methyl furfural, and terpine-4-ol, were identified. The antifungal effects of those four chemical components against Alternaria mali (A. mali), an agent of Alternaria blotch of apple, were then examined. It was observed that the minimum inhibitory concentrations (MICs) were 6.25, 0.78, 0.78, and 12.5 (mg/ml) of acetol, furfural, 5-methyl furfural, and terpine-4-ol, respectively. MICs of furfural and 5-methyl furfural had the same order of magnitude as that of an antifungal agrochemical, chlorothalonil. Although furfural itself can not be completely substituted for an antifungal agrochemical, a partial mixture of furfural and antifungal agrochemical may be used as a substitute. The use of agrochemicals for the prevention of plant disease caused by pathogenic fungus such as A. mali could be partially reduced by the application of this mixture.
Agrochemicals
;
Alternaria*
;
Distillation
;
Fungi*
;
Furaldehyde*
;
Mali*
;
Microbial Sensitivity Tests
;
Needles*
;
Plant Diseases
;
Plants*
5.Clinical Features of Small Intestinal Atresia.
Won Hyung CHO ; Jun Sik KIM ; Ju Sub PARK
Journal of the Korean Surgical Society 2000;59(4):532-538
PURPOSE: Intestinal atresia is a well-recognized cause of bowel obstruction in the newborn. The management of neonates with intestinal atresia has improved in recent decades due to refinements in neonatal intensive care, operative techniques, use of total parenteral nutrition (TPN), and neonatal anesthesia. More recently, the survival rate has risen rapidly up to 90%. METHODS: Twenty-five (25) cases of intestinal atresia were encountered at Kwangju-Christian Hospital between January 1985 and December 1998. We reviewed sex, gestational age, body weight, clinical manifestations, associated ano malies, causes, interval to operation, preoperative complications, operative methods, and postoperative complications. RESULTS: Sites involved were the duodenum (n=10; 40%), the jejunum (n=5; 20%), and the ileum (n=10; 40%). The sex distribution was male predominant (1.8:1). The overall survival rate in our hospital was 76%. CONCLUSION: Refinements in neonatal intensive care and perioperative management were important in decreasing postoperative mortality.
Anesthesia
;
Body Weight
;
Duodenum
;
Gestational Age
;
Humans
;
Ileum
;
Infant, Newborn
;
Intensive Care, Neonatal
;
Intestinal Atresia*
;
Jejunum
;
Male
;
Mali
;
Mortality
;
Parenteral Nutrition, Total
;
Postoperative Complications
;
Sex Distribution
;
Survival Rate
6.A Case of Pseudo-Kaposi's Sarcoma; Mali's variant.
Jong Gap PARK ; Dong Won LEE ; Jun Young LEE ; Baik Kee CHO
Korean Journal of Dermatology 2000;38(3):427-429
We report herein a 82-year-old male patient having pruritic purple or violaceous grouped papules and nodules based on the dark bluish plaques of a 5-year duration on both dorsa of the feet and toes. Also he complained of moderate-degree pitting edema and varicose veins for 30 years on both lower legs. We diagnosed his skin lesion as Mali variant of pseudo-Kaposi's sarcoma probably caused by chronic lymphedema and venous insufficiency.
Aged, 80 and over
;
Edema
;
Foot
;
Humans
;
Leg
;
Lymphedema
;
Male
;
Mali
;
Sarcoma*
;
Skin
;
Toes
;
Varicose Veins
;
Venous Insufficiency
7.Pseudo-Kaposi Sarcoma:Differential Diagnosis from Kaposi Sarcoma.
Kyoung Ae JANG ; Yeon Soon LIM ; Jee Ho CHOI ; Kyung Jeh SUNG ; Kee Chan MOON ; Jai Kyoung KOH
Annals of Dermatology 2000;12(2):83-89
BACKGROUND: Pseudo-Kaposi sarcoma mimicks Kaposi sarcoma, both clinically and histopathologically. These conditions are due to congenital (Stewart-Bluefarb syndrome) or acquired (Mali) vascular malformations. OBJECTIVES: The purposes of this study were aimed at evaluating the clinical and histopathological characteristics of pseudo-Kaposi sarcoma and finding differential diagnostic tools from Kaposi sarcoma. METHODS: Clinical information of 7 patients with pseudo-Kaposi sarcoma diagnosed in Asan Medical Center from 1989 to 1999 was obtained from the medical records and clinical follow-ups. We re-evaluated 10 biopsy specimens obtained from them and immunohistochemical studies for cutaneous lymphocyte antigen (CLA), CD34, vimentin, and factor VIII were performed with the standard streptavidin-biotin method using paraffin-embedded tissue specimens of 7 pseudo-Kaposi sarcomas and 3 Kaposi sarcomas. In addition, we examined whether human herpesvirus 8 (HHV8) was detected in 3 patients by polymerase chain reaction (PCR). RESULTS: Six male and one female patients were included. Mean age was 36.3 years. Three patients were classified into Mali type and the other four patients were into Stewart-Bludfarb type. Histopathological examinations revealed capillary proliferation in the upper dermis, perivascular infiltrate of inflammatory cells, extravasated red blood cells, and fibrosis of dermis. Anti-factor VIII and CD34 stained endothelial cells only. CLA was expressed in lymphocytic infiltrate in the epidermis and dermis of pseudo-Kaposi sarcoma, whereas it was negative in Kaposi sarcoma. PCR for HHV 8 showed negative results. CONCLUSIONS: Pseudo-Kaposi sarcoma is an uncommon entity with characteristic clinical and histopathological features. Differential diagnosis between Pseudo-Kaopsi sarcoma and Kaposi sarcoma is important. We suggest that detection of HHV 8 by PCR and imunohistochemical study for CLA may be effective tools in the differential diagnosis between them.
Biopsy
;
Capillaries
;
Chungcheongnam-do
;
Dermis
;
Diagnosis*
;
Diagnosis, Differential
;
Endothelial Cells
;
Epidermis
;
Erythrocytes
;
Factor VIII
;
Female
;
Fibrosis
;
Follow-Up Studies
;
Herpesvirus 8, Human
;
Humans
;
Lymphocytes
;
Male
;
Mali
;
Medical Records
;
Polymerase Chain Reaction
;
Sarcoma
;
Sarcoma, Kaposi*
;
Vascular Malformations
;
Vimentin
8.Screening for In Vitro Antifungal Activity of Soil Bacteria Against Plant Pathogens.
Sung Hwan CHANG ; Jung Yeop LEE ; Ki Deok KIM ; Byung Kook HWANG
Mycobiology 2000;28(4):190-192
Antifungal bacteria for biological control of plant diseases or production of novel antibiotics to plant pathogens were isolated in 1997 from various soils of Ansung, Chunan, Koyang, and Paju in Korea. Sixty-four bacterial strains pre-screened from approximately 1,400 strains were tested on V-8 juice agar against eight plant pathogenic fungi using in vitro bioassay technique for inhibition of mycelial growth. Test pathogens were Alternaria mali, Colletotrichum gloeosporioides, C. orbiculare, Fusarium oxysporum f. sp. cucumerinum, F. oxysporum f. sp. lycopersici, Magnaporthe grisea, Phytophthora capsici, and Rhizoctonia solani. A wide range of antifungal activity of bacterial strains was found against the pathogenic fungi, and strain RC-B77 showed the best antifungal activity. Correlation analysis between inhibition of each fungus and mean inhibition of all eight fungi by 64 bacterial strains revealed that C. gloeosporioides would be best appropriate for detecting bacterial strains producing antibiotics with potential as biocontrol agents for plant pathogens.
Agar
;
Alternaria
;
Anti-Bacterial Agents
;
Bacteria*
;
Biological Assay
;
Chungcheongnam-do
;
Colletotrichum
;
Fungi
;
Fusarium
;
Gyeonggi-do
;
Korea
;
Magnaporthe
;
Mali
;
Mass Screening*
;
Phytophthora
;
Plant Diseases
;
Plants*
;
Rhizoctonia
;
Soil*
10.Carrier Dectection and Prenatal Diagnosis of Hemophilia Ain Korean Populations Using PCR Analysis of DNA Polymorphismin St14 VNTR Locus.
Young Min CHOI ; Do Yeong HWANG ; Jin CHOE ; Jong Kwan JUN ; Chang Suk SUH ; Seok Hyun KIM ; Jung Gu KIM ; Shin Yong MOON ; Jin Yong LEE ; Eun Joo KIM
Korean Journal of Obstetrics and Gynecology 1997;40(3):572-580
At present, because of enormous variety of mutations in hemophilia A, carrier detection and prenatal diagnosis by DNA analysis has been relied almost always on indirect detection using linkage analysis of DNA polymorphisms withim or near to the factor VIII gene. However, there is marked ethnic variation in the incidence of heterozygosity for a given DNA polymorphism. So it is very important to find out which DNA polymorphism pattern is useful in Korean families with hemophilia A for carrier detection and prenatal diagnosis. To identify the usefulness of DNA polymorphism in St14 VNTR locus for carrier detection and prenatal diagnosis of hemophilia A in Korean populations, we have analysed the DNA polymorphism in St14 VNTR locus in 80 Korean families with hemophilia A using polymerase chain reaction. We could identify 14 alleles in subjects studied, which ranges from 620 bp to 2830 bp. Expected heterozygosity rate, calculated from the allele frequencies, was 78.7%, and observed heterozygosity rate was 71.3% (57/80). Carrier detection was performed in 43 women from families informative with St14 VNTR : Seventeen women were diagnosed as non-carriers, 11 women as carriers. And 15 women were suspected to be carriers since they were from families of sporadic cases of hemophilia A. And prenatal diagnosis was done in 4 pregnant carrier women : noe fetus proved to be normal males, two fetuses to be normal females, and one to be a carrier. And five pregnant women, suspected to be carrier since they were from families of sporadic cases of hemophilia A, underwent prenatal diagnosis : One fetus was diagnosed as a normal mali, one as a normal female, two as possible carriers, and one as a possible affeted mali, whom the analysis of factor VIII level in fetal blood by cordocentesis revealed to be affected by hemophilia A. These data indicate that PCR-based analysis of St14 VNTR is very useful for the carrier detection and prenatal diagnosis of hemophilia A in Korea.
Alleles
;
Cordocentesis
;
DNA*
;
Factor VIII
;
Female
;
Fetal Blood
;
Fetus
;
Gene Frequency
;
Hemophilia A*
;
Humans
;
Incidence
;
Korea
;
Male
;
Mali
;
Minisatellite Repeats*
;
Polymerase Chain Reaction*
;
Pregnant Women
;
Prenatal Diagnosis*

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