To characterize rotavirus G and P genotypes circulating among infants and young children hospitalized with severe diarrhea in a university hospital in Gyeonggi province, Korea, and to examine any association of the genotypes and nosocomial infections, we genotyped 103 isolates of rotavirus by multiplex RT-PCR. In July 2001-June 2002, we found that globally common strains constituted 64.2% (G2P[4] 28.3%, G3P[8] 28.3%, G4P[8] 5.7%, and G1P[8] 1.9%), and the uncommon strain, G4P[6], constituted 26.4%. During July 2002-June 2003, the percentage of common strains decreased to 44.0% (G3P[8] 18.0%, G2P[4] 16.8%, and G1P[8] 10.0%), but G4P[6] increased to 36.0%. G9P[8] was identified in 10.0% of cases, and thus can be considered an emerging strain in Korea. Eight-eight percent of G4P[6] was isolated from newborn babies. Among the 103 patients, there was an evidence of nosocomial rotavirus infection in 23 children (22.3%). Of these, 19 (82.6%) were newborns infected with G4P[6] strains of rotavirus. Most of the children who acquired rotavirus infection nosocomially showed symptoms of diarrhea, vomiting, fever, poor sucking, or dehydration, regardless of the genotype. This study revealed that G4P[6] has been the major genotype causing nosocomial rotavirus infection in our hospital.
Rotavirus Infections/classification/*microbiology ; Rotavirus/*classification/*genetics ; Male ; Infant ; Humans ; Genotype ; Feces/microbiology ; Diarrhea/*microbiology ; Cross Infection/classification/*microbiology ; Child, Preschool

To characterize rotavirus G and P genotypes circulating among infants and young children hospitalized with severe diarrhea in a university hospital in Gyeonggi province, Korea, and to examine any association of the genotypes and nosocomial infections, we genotyped 103 isolates of rotavirus by multiplex RT-PCR. In July 2001-June 2002, we found that globally common strains constituted 64.2% (G2P[4] 28.3%, G3P[8] 28.3%, G4P[8] 5.7%, and G1P[8] 1.9%), and the uncommon strain, G4P[6], constituted 26.4%. During July 2002-June 2003, the percentage of common strains decreased to 44.0% (G3P[8] 18.0%, G2P[4] 16.8%, and G1P[8] 10.0%), but G4P[6] increased to 36.0%. G9P[8] was identified in 10.0% of cases, and thus can be considered an emerging strain in Korea. Eight-eight percent of G4P[6] was isolated from newborn babies. Among the 103 patients, there was an evidence of nosocomial rotavirus infection in 23 children (22.3%). Of these, 19 (82.6%) were newborns infected with G4P[6] strains of rotavirus. Most of the children who acquired rotavirus infection nosocomially showed symptoms of diarrhea, vomiting, fever, poor sucking, or dehydration, regardless of the genotype. This study revealed that G4P[6] has been the major genotype causing nosocomial rotavirus infection in our hospital.
Rotavirus Infections/classification/*microbiology ; Rotavirus/*classification/*genetics ; Male ; Infant ; Humans ; Genotype ; Feces/microbiology ; Diarrhea/*microbiology ; Cross Infection/classification/*microbiology ; Child, Preschool

Acquired hemophilia is a rare disorder caused by autoantibodies to factor VIII (FVIII) (also referred to as factor VIII inhibitors or anti-FVIII) and may be associated with pregnancy, underlying malignancy, or autoimmune disorders. A 33-month-old girl who presented with hematochezia and ecchymotic skin lesions was diagnosed with Mycoplasma pneumoniae pneumonia by serology and polymerase chain reaction. Hematologic studies showed a prolonged activated partial thromboplastin time (aPTT), partially corrected mixing test for aPTT, reduced levels of FVIII, and the presence of antibodies against FVIII. She was treated conservatively with prednisone and intravenous immunoglobulin (IVIG) without FVIII transfusion and recovered without sequelae. This report provides the first description of acquired hemophilia due to anti-FVIII in association with M. pneumoniae in Korea. We discuss this case in the context of the current literature on acquired hemophilia in children.
Autoantibodies/blood ; Child, Preschool ; Factor VIII/immunology ; Female ; Hemophilia A/*etiology ; Humans ; Partial Thromboplastin Time ; Pneumonia, Mycoplasma/*complications/immunology ; Time Factors

BACKGROUND: Rotavirus is the most common cause of childhood diarrhea worldwide. Although rotavirus is also the leading cause of infant and childhood diarrhea in Korea, much remains unknown about the trends of rotavirus infection by month and geographic region in Korea. To monitor epidemiologic trends of rotavirus infection, a laboratory-based rotavirus surveillance network was established in 2002. This is the first nationwide, multicenter evaluation of rotavirus epidemiology in Korea. METHODS: The rotavirus test results were collected retrospectively from eight network laboratories, from July 1999 to June 2002. Four laboratories used latex agglutination, three used immunochromatography, and one used enzyme-linked fluorescent assay for the detection of rotavirus antigen. RESULTS: Of 10, 441 stool specimens, 2, 496 (23.9%) were positive for rotavirus. During the 3-year period, the rotavirus season began in December-January, and ended in April-May. The rotaviruspositive percentage of summer, autumn, winter, and spring was 11.5%, 10.0%, 32.8%, and 30.0%, respectively. A few hospitals revealed summer epidemics. The rotavirus positive rate in each hospital varied from 15.3% to 44.2%. A common feature of the three hospitals showing the lowest rotavirus-positive percentage (i.e. <20%) was their large size (>800 beds). The secondary care hospitals showed a higher positive proportion (27.5%) compared with tertiary care hospitals (21.1%). CONCLUSIONS: Overall, the rotavirus-positive percentage among all diarrheal specimens was similar to that of other developed countries. The results of this study showed that the autumn epidemic of the rotavirus has declined or disappeared and the peak season for rotavirus has shifted to late winter/early spring in Korea.
Agglutination ; Developed Countries ; Diarrhea ; Epidemiology ; Humans ; Immunochromatography ; Infant ; Korea ; Latex ; Republic of Korea* ; Retrospective Studies ; Rotavirus ; Rotavirus Infections* ; Seasons ; Secondary Care ; Tertiary Healthcare

Basidiomycetous macrofungi play important roles in maintaining forest ecosystems via carbon cycling and the mobilization of nitrogen and phosphorus. To understand the impact of human activity on macrofungi, an ongoing project at the Korea National Arboretum is focused on surveying the macrofungi in unexploited areas. Mt. Oseo was targeted in this survey because the number of visitors to this destination has been steadily increasing, and management and conservation plans for this destination are urgently required. Through 5 field surveys of Mt. Oseo from April to October 2012, 116 specimens of basidiomycetous macrofungi were collected and classified. The specimens were identified to the species level by analyzing their morphological characteristics and their DNA sequence data. A total of 80 species belonging to 57 genera and 25 families were identified. To the best of our knowledge, this is the first study to identify five of these species-Artomyces microsporus, Hymenopellis raphanipes, Pholiota abietis, Phylloporus brunneiceps, and Sirobasidium magnum-in Korea.
Base Sequence ; Carbon ; Checklist* ; Ecosystem ; Human Activities ; Humans ; Korea ; Nitrogen ; Pholiota ; Phosphorus