To investigate the infection status of pigs with Cryptosporidium parvum, 589 fecal samples were collected from pigs raised at farm in Chungcheongbuk-do and Chungcheongnam-do. Of the 589 pig fecal samples, 62 (10.5%) were positive for C. parvum. The area showing the highest positive rate was Dangjin-gun, Chungcheongnam-do (14.0%), and the lowest (0%) Salmi-myon, Chungcheongbuk-do. The positive rate of C. parvum in Judok-eup increased from 12.7% in the winter to 22.1% in the summer. The results of this study suggest that the pigs may be a source of human C. parvum infection.
Animal Husbandry ; Animals ; Cryptosporidiosis/epidemiology/parasitology/*veterinary ; Cryptosporidium parvum/*isolation & purification ; Feces/parasitology ; Korea/epidemiology ; Parasite Egg Count ; Swine ; Swine Diseases/*epidemiology/*parasitology

The reservoir hosts of Thelazia callipaeda were examined. The eyes of the 76 dogs raised at farm, 78 military dogs (shepherds), 96 cattle, and 105 pigs were investigated for the presence of eyeworm. Among them, six worms of T. callipaeda were collected from two dogs raised at farm (2.7%), and 188 worms from 26 shepherds (33.5%). No worms were recovered from the cattle or pigs. These results suggest that the dogs, especially the military dogs are serving as a reservoir host of T. callipaeda. in Korea.
Animals ; Cattle ; Disease Reservoirs/*veterinary ; Dog Diseases/epidemiology/*parasitology ; Dogs ; Eye/parasitology ; Female ; *Host-Parasite Interactions ; Korea/epidemiology ; Male ; Prevalence ; Spirurida Infections/epidemiology/parasitology/*veterinary ; Swine ; Thelazioidea/*isolation & purification

Pneumocystis carinii causes serious pulmonary infection in immunosuppressed patients. This study was undertaken to observe the cytoskeletal proteins of P. carinii by immuno-electron microscopy. P. carinii infection was experimentally induced by immunosuppression of Sprague-Dawley rats for seven weeks, and their lungs were used for the observations of this study. The gold particles localized actin, tropomyosin, and tubulin. The actin was irregularly scattered in the cytoplasm of the trophic forms but was much more concentrated in the inner space of the cell wall of the cystic forms called the inner electron-lucent layer. No significant amount of tropomyosin was observed in either trophic forms or cystic forms. The tubulin was distributed along the peripheral cytoplasm and filopodia of both the trophic and cystic forms rather than in the inner side of the cytoplasm. Particularly, in the cystic forms, the amount of tubulin was increased and located mainly in the inner electron-lucent layer of the cell wall where the actin was concentrated as well. The results of this study showed that the cell wall of P. carinii cystic forms is a structure whose inner side is rich in actin and tubulin. The location of the actin and tubulin in P. carinii suggests that the main role of these proteins is an involvement in the protection of cystic forms from the outside environment by maintaining rigidity of the cystic forms.
Actins/analysis ; Animals ; Cytoskeletal Proteins/*analysis ; Fungal Proteins/*analysis ; Histocytochemistry ; Microscopy, Immunoelectron ; Pneumocystis/*chemistry/cytology ; Rats ; Rats, Wistar ; Support, Non-U.S. Gov't ; Tropomyosin/analysis ; Tubulin/analysis

Acute intermittent porphyria (AIP) is a rare disorder characterized biochemically by the increased excretion of porphyrins and porphyrin precursors, including delta-aminolevulinic acid (ALA) and porphobilinogen (PBG). AIP has variable clinical manifestations, such as acute abdominal pain, vomiting, nausea, constipation, peripheral neuropathy, seizures, tachycardia, and hypertension. A 16-year-old girl presented with recurrent abdominal pain, vomiting, hypertension, seizures, hypercholesterolemia, and red urine. AIP was confirmed by clinical features and increased 24-hour urine ALA and PBG. AIP should be considered in the differential diagnosis of patients who have abdominal pain, hypertension, and seizures when the results of all other tests are normal.
Abdominal Pain ; Adolescent ; Aminolevulinic Acid ; Constipation ; Diagnosis, Differential ; Humans ; Hypercholesterolemia ; Hypertension ; Nausea ; Peripheral Nervous System Diseases ; Porphobilinogen ; Porphyria, Acute Intermittent ; Porphyrins ; Seizures ; Tachycardia ; Vomiting

PURPOSE: The resistance of H. pylori to clarithromycin is one of the major causes of eradication failure. In H. pylori, clarithromycin resistance is due to point mutation in 23S rRNA. The aims of this study were to investigate the mutation of 23S rRNA and to examine the association of cagA, vacA genotype and clarithromycin resistant genes. METHODS: H. pylori DNA was extracted from antral biopsy specimens from 27 children with H. pylori infection. Specific polymerase chain reaction (PCR) assays were used for cagA and vacA. Mutations associated with clarithromycin resistance were detected by using PCR restriction fragment length polymorphism (RFLP) analysis of 23S rRNA gene. RESULTS: A2143G mutation was detected in one case and A2144G in 4, indicating 18.5% were clarithromycin resistant. Among the total of 27, cagA was present in 25 (93%), vacA s1a/m1 in 6 (22%), s1a/m2 in 3 (11%), s1c/m1 in 16 (59%), and s1c/m2 in 1 (4%). All of the 5 clarithromycin resistant strains were cagA (+), among which 2 were s1a/m1 and 2 were s1c/m1. There was no relation between genotypes and clarithromycin resistant genes. CONCLUSION: Detection of H. pylori resistance to clarithromycin using PCR RFLP from biopsy specimens might be useful for the selection of antibiotics. Clarithromycin resistant genes are not associated with genotypes of cagA and vacA.
Anti-Bacterial Agents ; Biopsy ; Child* ; Clarithromycin* ; DNA ; Genes, rRNA ; Genotype ; Helicobacter pylori* ; Helicobacter* ; Humans ; Point Mutation ; Polymerase Chain Reaction ; Polymorphism, Restriction Fragment Length

This study was performed to analyze 6 day-term variations in bacterial communities contaminating the floor of two dry saunas that were operated at 64degrees C (low temp) and 76degrees C (high temp). Bacteria were sampled daily from the saunas for 6 days from Monday to Saturday. Genomic DNA was isolated directly from bacteria-collected cotton swabs. The diversity of the bacterial communities collected from the saunas was analyzed using thermal gradient gel electrophoresis (TGGE). The total numbers of DNA bands separated by TGGE for bacteria collected from the low temp and high temp sauna were 20 and 18, respectively, during the 6 days. Seven of 20 bacteria in the low temp sauna and eight of 18 bacteria in the high temp sauna were detected more than three times over the 6 experimental days. Twelve of the 26 bacterial genera contaminating the saunas were cross detected. Bacteria belonging to the genera Moraxella and Acinetobacter were selectively detected in the low temp sauna, whereas those belonging to Aquaspirillum, Chromobacterium, Aquabacterium, Gulbenkiania, Pelomonas, and Aquitalea were selectively detected in the high temp sauna. Three species of bacteria contaminating both the low and high temp saunas were thermophile or thermoduric. The results indicate that the sauna-contaminating bacteria may have been transferred from outside the saunas by user traffic but did not inhabit the saunas.
Acinetobacter ; Bacteria ; Chromobacterium ; DNA ; Electrophoresis ; Floors and Floorcoverings ; Moraxella ; Steam Bath

PURPOSE: This study was conducted to evaluate the role of adiponectin, leptin, and tumor necrosis factor-alpha (TNF-alpha) in the pathogenesis of non-alcoholic fatty liver disease (NAFLD) in obese children, and to elucidatethe relationship between these adipokines and insulin resistance. METHODS: A total of 61 obese children (M : F=42 : 19, mean age 11.2+/-1.3 years) admitted to our facility between March 2004 and June 2005 were included in this study. Patients were divided into three groups based on their NAFLD status obese children without fatty liver (N=23); obese children with simple steatosis (N=20); and obese children with non-alcoholic steatohepatitis (NASH) (N=18). The serum levels of adiponectin, leptin, and TNF-alpha were measured, and insulin resistance determined by homeostasis model assessment (HOMA-IR) was calculated to estimate insulin resistance. In addition, the VSR (visceral-subcutaneous fat ratio) was estimated using abdominal computed tomography. RESULTS: There was no difference in serum TNF-alpha and leptin levels observed between the 3 groups (22.13+/-6.37 vs. 21.35+/-6.95 vs. 25.17+/-9.30; p=0.342 & 20.29+/-8.57 vs. 16.42+/-6.85 vs. 20.10+/-7.86; p=0.330). However, the serum adiponectin level was significantly lower in children with non-alcoholic steatohepatitis (NASH) than in the other two groups (6.08+/-1.38 in children without steatosis vs. 5.69+/-0.79 in simple steatosis vs. 4.93+/-1.75 in NASH; p=0.026). In addition, the VSR was significantly increased in the NASH group (0.31+/-0.08 vs. 0.32+/-0.11 vs. 0.47+/-0.14; p=0.001), and HOMA-IR revealed a significant difference among the three groups (4.77+/-3.67 vs. 6.89+/-7.05 vs. 10.42+/-6.73; p=0.000). However, there was no significant correlation observed between the adiponectin levels and the HOMA-IR or the VSR (r=-0.117; p=0.450 & r=-0.106; p=0.499). CONCLUSION: Insulin resistance may affect the development of hepatic steatosis and steatohepatitis in children, and the results of this study suggest that, of several adipokines evaluated, adiponectin is important in the progression of steatosis to steatohepatitis in obese children.
Adipokines* ; Adiponectin ; Adipose Tissue* ; Body Fat Distribution* ; Child* ; Fatty Liver* ; Homeostasis ; Humans ; Insulin Resistance* ; Insulin* ; Leptin ; Obesity ; Tumor Necrosis Factor-alpha

PURPOSE: This study was conducted to evaluate the role of adiponectin, leptin, and tumor necrosis factor-alpha (TNF-alpha) in the pathogenesis of non-alcoholic fatty liver disease (NAFLD) in obese children, and to elucidatethe relationship between these adipokines and insulin resistance. METHODS: A total of 61 obese children (M : F=42 : 19, mean age 11.2+/-1.3 years) admitted to our facility between March 2004 and June 2005 were included in this study. Patients were divided into three groups based on their NAFLD status obese children without fatty liver (N=23); obese children with simple steatosis (N=20); and obese children with non-alcoholic steatohepatitis (NASH) (N=18). The serum levels of adiponectin, leptin, and TNF-alpha were measured, and insulin resistance determined by homeostasis model assessment (HOMA-IR) was calculated to estimate insulin resistance. In addition, the VSR (visceral-subcutaneous fat ratio) was estimated using abdominal computed tomography. RESULTS: There was no difference in serum TNF-alpha and leptin levels observed between the 3 groups (22.13+/-6.37 vs. 21.35+/-6.95 vs. 25.17+/-9.30; p=0.342 & 20.29+/-8.57 vs. 16.42+/-6.85 vs. 20.10+/-7.86; p=0.330). However, the serum adiponectin level was significantly lower in children with non-alcoholic steatohepatitis (NASH) than in the other two groups (6.08+/-1.38 in children without steatosis vs. 5.69+/-0.79 in simple steatosis vs. 4.93+/-1.75 in NASH; p=0.026). In addition, the VSR was significantly increased in the NASH group (0.31+/-0.08 vs. 0.32+/-0.11 vs. 0.47+/-0.14; p=0.001), and HOMA-IR revealed a significant difference among the three groups (4.77+/-3.67 vs. 6.89+/-7.05 vs. 10.42+/-6.73; p=0.000). However, there was no significant correlation observed between the adiponectin levels and the HOMA-IR or the VSR (r=-0.117; p=0.450 & r=-0.106; p=0.499). CONCLUSION: Insulin resistance may affect the development of hepatic steatosis and steatohepatitis in children, and the results of this study suggest that, of several adipokines evaluated, adiponectin is important in the progression of steatosis to steatohepatitis in obese children.
Adipokines* ; Adiponectin ; Adipose Tissue* ; Body Fat Distribution* ; Child* ; Fatty Liver* ; Homeostasis ; Humans ; Insulin Resistance* ; Insulin* ; Leptin ; Obesity ; Tumor Necrosis Factor-alpha

PURPOSE: To describe clinical features of cyclic vomiting syndrome(CVS), managements during episodes, prophylactic drugs as long term therapy and to investigate the disease course and prognostic factors of CVS. METHODS: Thirty two children who fulfilled the diagnostic criteria of CVS and who presented to Seoul National University Children's Hospital from March 1989 to December 2000, were included. Data were obtained from chart review and telephone interview. RESULTS: All had recurrent, self-limited episodes and were free of symptoms between episodes. During the acute phase of episodes, lorazepam and ondansetron were effective in some patients. Various prophylactic drugs were tried and some patients recovered after the use of clobazam, clonazepam, erythromycin and imipramine. Among 32 patients, 18 had recovered from CVS. The age at recovery was 9.4 +/- 4.0 years. It took 3.4 +/- 2.2 years from the onset to the recovery. The age at onset was later in the recovery group than in the non-recovery group(6.1 +/- 3.2 vs 1.7 +/- 1.8 years; P=0.015) and the duration of episodes was longer in the recovery group(5.2 +/- 1.6 vs 2.3 +/- 1.2 days; P=0.003). CONCLUSION: Many patients recovered from CVS spontaneously. The prognosis in patients with later onset of the disease and the longer duration of episodes seemed to be better. Prophylactic drugs such as clobazam, clonazepam, erythromycin and imipramine may be beneficial. A total approach including trials of prophylactic drugs, removal of the triggering factor and psychiatric support is needed in the management of CVS.
Child ; Clonazepam ; Erythromycin ; Humans ; Imipramine ; Interviews as Topic ; Lorazepam ; Ondansetron ; Prognosis* ; Seoul ; Vomiting*

The present study was undertaken to know the infection status of Cryptosporidium parvum among the residents of Chorwon-gun, Kangwon-do in 1993. Total 461 fecal samples were collected from the inhabitants residing in Chorwon-gun during the period of August 12 to September 14, 1993. Fecal smears were prepared by formalin-ether sedimentation, and examined after modified acid fast staining. Of the 461 fecal samples, 9 (1.9%) were positive for C. parvum oocysts. The positive cases were limited to thirties (4) patients, forties (3), and sixties (2), and no oocyst was detected in other age groups. The oocyst positive rate for male was 1.4% and that of female was 2.6%.
Adolescent ; Adult ; Age Factors ; Aged ; Animals ; Child ; Cryptosporidiosis/*epidemiology/parasitology ; Cryptosporidium parvum/isolation & purification ; Feces/parasitology ; Female ; Human ; Korea/epidemiology ; Male ; Middle Aged ; Parasite Egg Count ; Sex Factors