BACKGROUND: Aseptic meningitis is a common illness of children. It seems that viruses are the usual etiologic agents. The distribution of these agents mainly depends on the isolated time and region area. This study was performed to isolate the causative viruses from patients with aseptic meningitis in Gwangju area during recent one year. METHODS:A total of 130 patients with aseptic meningitis were evaluated. Stool and/or cerebrospinal fluid specimens from patients were inoculated into rhabdomyosarcoma (RD), HEp2 and Vero cell lines. The virus propagation was examined by the presence of cytopathic effects. Neutralizing tests using enterovirus serum pool were done on each viral isolates. RESULTS: The isolation rate of enterovirus was 24.6% (32/130). The enterovirus isolates were obtained mostly from stool specimens (29/32). Twenty-two isolates were identified by neutralizing test. Ten isolates disclosed 'untyping' by neutralizing test. The distribution of isolates was coxsackievirus group B2 (11 stains, 34.4%), echovirus 30 (4 strains, 12.5%), echovirus 6 (3 strains, 9.4%), echovirus 9, 11, 25 and coxsackievirus group A16 (1 strain, respectively). These strains were predominantly isolated during summer season (June to July). CONCLUSIONS: The causative viruses from patients with aseptic meningitis in Gwangju area during recent 1 year were coxsackievirus group B2, echovirus 30, 6, 9, 11, 25 and coxsackievirus group A16 which were mostly isolated from stool specimens in summer season.
Cerebrospinal Fluid ; Child ; Coloring Agents ; Echovirus 6, Human ; Echovirus 9 ; Enterovirus ; Enterovirus B, Human ; Gwangju* ; Humans ; Meningitis, Aseptic* ; Rhabdomyosarcoma ; Seasons ; Vero Cells

PURPOSE: There was an outbreak of aseptic meningitis in Busan and Kyoungsangnamdo area from April to July, 2002. In this study, we reported the clinical manifestations, laboratory data and causative viruses. METHODS: 184 children with aseptic meningitis who had been admitted to Department of Pediatrics, Inje Paik Hospital in Kaegum and Dongrae between April and July 2002 were assessed. Virus isolation and serotype identification were performed by cell culture and reverse transcription-polymerase chain reaction(RT-PCR) of cerebrospinal fluid. RESULTS: The peak incidence was noted in May. Male-to-female ratio was 2:1. The age ranged from 2 years to 16 years. Mean age was 8.7+/-7.1 years. Clinical manifestations were fever(95.1%), headache(91.8%) and vomiting(89.7%). Mean duration of fever was 2.6 days. The numbers of peripheral blood leukocytes were 1,400-20,000/mm3 and mean value was 9,829/mm3. On cerebrospinal fluid examinations, leukocyte count was in range of 10-2,000(mean 301)/mm3, protein level in range of 10-196(mean 36.7)mg/dL and glucose level from 17 to 155(mean 58.3)mg/dL. Viruses were isolated 13(8.4%) out of 154 patients and serotypes were 6 cases of echovirus 6, 3 cases of echovirus 9, 1 case of echovirus 13, 2 cases of echovirus 25 and 1 case of echovirus 30. CONCLUSION: Aseptic meningitis was prevalent in Busan and Kyoungsangnamdo area from April to July, 2002. We thought that causative viruses were echovirus 6, 9, 13, 25, 30.
Busan* ; Cell Culture Techniques ; Cerebrospinal Fluid ; Child ; Echovirus 6, Human ; Echovirus 9 ; Enterovirus B, Human ; Fever ; Glucose ; Gyeongsangnam-do* ; Humans ; Incidence ; Leukocyte Count ; Leukocytes ; Meningitis, Aseptic* ; Pediatrics

PURPOSE: There occurred an explosive outbreak of aseptic meningitis in Ulsan, in the year of 2002. In this study, we report clinical manifestations, laboratory data and causative viruses of the outbreak. METHODS: Were assessed 371 children with aseptic meningitis who were admitted to the Department of Pediatrics, Ulsan University Hospital in Ulsan between May and July, 2002. We reviewed the sex, age, clinical manifestations, peripheral blood examinations and CSF examinations of the patients. Virus isolation and serotype identification were performed by cell cultures of cerebrospinal fluid and stool. RESULTS: The ratio of males to females was 1.9:1. The majority of aseptic meningitis occurred in children between 1 and 5 years of age with a mean age of 6.8+/-5.1 years. The clinical manifestations was fever, headache, vomiting, and abdominal pain and 16.2% of the patients developed neck stiffness. The mean duration of fever was 3.2 days. The mean value of peripheral blood leukocytes was 10,355+/-4,800/mm3 and the mean value of CRP was 0.96+/-1.67 mg/dL. Initial CSF findings revealed leukocytes 212+/-385/mm3, protein 37.0+/-18.9 mg/dL and glucose 68.3+/-17.6 mg/dL. Viruses were isolated 67(18.1%) out of 371 patients and the serotypes were echovirus 6 in 10 cases, echovirus 9 in 15 cases, echovirus 11 in 4 cases, echovirus 13 in 18 cases, and unclassified enterovirus in 20 cases. CONCLUSION: Aseptic meningitis was prevalent in Ulsan, in the year of 2002. The clinical manifestations and the laboratory findings of the patients were compatible with those of previous reports. The causative viruses were echovirus 6, echovirus 9, echovirus 11, echovirus 13 and unclassified enterovirus.
Abdominal Pain ; Cell Culture Techniques ; Cerebrospinal Fluid ; Child ; Echovirus 6, Human ; Echovirus 9 ; Enterovirus ; Enterovirus B, Human ; Female ; Fever ; Glucose ; Headache ; Humans ; Leukocytes ; Male ; Meningitis, Aseptic* ; Neck ; Pediatrics ; Ulsan* ; Vomiting

PURPOSE: There was a outbreak of aseptic meningitis in Busan, 2002. We report the clinical features and causative viruses. METHODS: Two hundred seventy six children with aseptic meningitis who were admitted to the Department of Pediatrics, Maryknoll Hospital between January and December, 2002 were included. CSF, stool and throat swab viral cultures were done in 244 of these children. RESULTS: The male to female ratio was 1.4 : 1. Age of patients varied from five months to fourteen years old. Average age was 5.7+/-6.2 years old and mostly between one and four years.(41.3%) Monthly distribution revealed that the number of patients increased from May to July. The main symptoms were fever, headache and vomiting in this order. Respiratory tract infection symptom was associated from June to July and headache and nausea without fever were characteristically observed in children more than 10 years old from November to December. In peripheral blood examination, leukocytosis(WBC>10,000/mm3) showed in 34.8%, ESR was increased in 56.1%, and CRP was positive value in 61%. Therefore differential diagnosis was difficult through peripheral blood examination. CSF findings revealed mean leukocyte count 86.5+/-180.2/mm3, protein 41.7+/-32.9 mg/dL, glucose 56.4+/-9.9 mg/dL. Median hospitalized period was 4.7+/-7.2 days and compared with non-tapping group, hospitalized period was shorter and subsidance of symptoms was faster, therefore antibiotics injection period was shorter in the spinal tapping group. Virus was isolated in 31 cases of 244. The causative agents were echovirus 6, echovirus 9, echovirus 25, coxsakie virus B3, B4. CONCLUSION: There was an epidemics of aseptic meningitis in Busan, 2002; the causative agent was echovirus 6, 9, 25, coxsakie virus B3, B4.
Anti-Bacterial Agents ; Busan* ; Child ; Diagnosis, Differential ; Echovirus 6, Human ; Echovirus 9 ; Enterovirus B, Human ; Female ; Fever ; Glucose ; Headache ; Humans ; Leukocyte Count ; Male ; Meningitis, Aseptic* ; Nausea ; Pediatrics ; Pharynx ; Respiratory Tract Infections ; Spinal Puncture ; Vomiting

The environmental water samples assayed by total culturable virus assay (TCVA) were evaluated by reverse transcription-polymerase chain reaction (RT-PCR) and integrated cell culture-PCR (ICC-PCR) method for enteroviruses and reovirus since they are the usually detected virus groups by culture assays. The detection sensitivities of the TCVA, RT-PCR, and ICC-PCR were compared and the overall reliability of the detection was analyzed to confirm environmental samples for enteric viruses. A total of eight samples from different areas was analyzed by performing TCVA, RT-PCR, and ICC-PCR. Virus concentrations in surface water samples ranged from 1.03 to 47.3 most probable numbers of infectious units (MPN) per 100 liters. When primers specific for both enteroviruses and reoviruses were used in both RT-PCR and ICC-PCR, all the samples (100%) were positive for the viruses. Reoviruses were the most frequently detected ones among the samples. According to the sequence results of enteroviruses, five of the samples were contaminated by coxsackievirus type B3, and the rest by coxsackievirus type B6, echovirus type 30, or vaccine strain poliovirus type 3. It was observed that both enteroviruses and reoviruses were detected concurrently in all CPE-positive environmental water samples.
Enterovirus B, Human ; Enterovirus* ; Poliovirus ; Water*

The environmental water samples assayed by total culturable virus assay (TCVA) were evaluated by reverse transcription-polymerase chain reaction (RT-PCR) and integrated cell culture-PCR (ICC-PCR) method for enteroviruses and reovirus since they are the usually detected virus groups by culture assays. The detection sensitivities of the TCVA, RT-PCR, and ICC-PCR were compared and the overall reliability of the detection was analyzed to confirm environmental samples for enteric viruses. A total of eight samples from different areas was analyzed by performing TCVA, RT-PCR, and ICC-PCR. Virus concentrations in surface water samples ranged from 1.03 to 47.3 most probable numbers of infectious units (MPN) per 100 liters. When primers specific for both enteroviruses and reoviruses were used in both RT-PCR and ICC-PCR, all the samples (100%) were positive for the viruses. Reoviruses were the most frequently detected ones among the samples. According to the sequence results of enteroviruses, five of the samples were contaminated by coxsackievirus type B3, and the rest by coxsackievirus type B6, echovirus type 30, or vaccine strain poliovirus type 3. It was observed that both enteroviruses and reoviruses were detected concurrently in all CPE-positive environmental water samples.
Enterovirus B, Human ; Enterovirus* ; Poliovirus ; Water*

BACKGROUND: Aseptic meningitis is an acute viral infection of the central nervous system that occurs commonly in childhood. Although the etiologic agent is not always identified, the human enteroviruses are responsible for most cases of aseptic meningitis in which a cause can be identified. Enterovirus causes approximately 80% of all cases of aseptic meningitis. In 1993, there was a nationwide epidemic of aseptic meningitis by echovirus 9 and 30. We reported that the cause of aseptic meningitis in 1994 was echovirus 3 and coxsackievirus B3 and echovirus 7 in 1995. This study was done to detect the causative agent of aseptic meningitis in spring, 1996. METHODS: To isolate the causative viruses, stool and cerebrospinal fluid specimens from the patients with aseptic meningitis, who were admitted to Severance Hospital in 1996, were collected. Cultured RD cells and HEp-2 cells were inoculated with specimens to see the cytopathic effects. Neutralizing antibody tests using enterovirus serum pool were done on the specimens with the cytopathic effects. RNA was isolated from the cultured supernatants of the infected cells. Oligonucleotide was synthesized by PCR, which was run on polyacrylamide gel after purification with HPLC. After running the DNA produced by using Geneamp RNA PCR kit, electrophoresis was done. RESULTS: Enteroviruses were isolated from 14 out of 17 patients. Among these fourteen, Coxsackievirus B1 was isolated in 13 patients and poliovirus in one patient. PCR product from these viruses showed a 152bp band on electrophoresis. CONCLUSION: The causative virus of aseptic meningitis in patients who were admitted to Severance Hospital during the spring season of 1996 was Coxsackievirus B1.
Antibodies, Neutralizing ; Central Nervous System ; Cerebrospinal Fluid ; Chromatography, High Pressure Liquid ; DNA ; Echovirus 9 ; Electrophoresis ; Enterovirus B, Human ; Enterovirus* ; Humans ; Meningitis, Aseptic* ; Poliovirus ; Polymerase Chain Reaction ; RNA ; Running ; Seasons

This article describes the nomenclature, history and genetic evolution of duck hepatitis A virus, and updates the epidemiology, clinical symptom and surveillances of duck virus hepatitis A. It also summarizes the present status and progress of duck virus hepatitis A and illustrated the necessity and urgency of its research, which provides rationale for the control of duck hepatitis A virus disease in China.
Animals ; Ducks ; virology ; Hepatitis Virus, Duck ; classification ; genetics ; isolation & purification ; Hepatitis, Viral, Animal ; virology ; Picornaviridae Infections ; veterinary ; virology

Objective: To develop RT-nPCR assays for amplifying partial and complete VP1 genes of human enteroviruses (HEVs) from clinical samples and to contribute to etiological surveillance of HEV-related diseases. Methods: A panel of RT-nPCR assays, consisting of published combined primer pairs for VP1 genes of HEV A-C and in-house designed primers for HEV-D, was established in this study. The sensitivity of each RT-nPCR assay was evaluated with serially diluted virus stocks of five serotypes expressed as CCID Results: The sensitivity of RT-nPCR assays for amplifying partial VP1 gene of HEVs was 0.1 CCID Conclusion This RT-nPCR system is capable of amplifying the partial and complete VP1 gene of HEV A-D, providing rapid, sensitive, and reliable options for molecular typing and molecular epidemiology of HEVs in clinical specimens.
Capsid Proteins/genetics* ; Enterovirus A, Human/genetics* ; Enterovirus B, Human/genetics* ; Enterovirus C, Human/genetics* ; Enterovirus D, Human/genetics* ; Humans ; Molecular Epidemiology/methods* ; Molecular Typing/methods* ; Reverse Transcriptase Polymerase Chain Reaction/methods*

PURPOSE: This study was performed to investigate the epidemiology of enterovirus (EV) infections in children at a secondary hospital during recent 5 years. METHODS: We collected the cerebrospinal fluid, stool and throat swab samples from the pediatric patients with suspected EV infections in KEPCO Medical Center, Seoul, Korea from July 2006 to September 2010. EV detection and genotype identification were performed by RT-PCR at Korea Centers for Disease Control and Prevention. RESULTS: A total of 386 samples were collected from 277 patients during study period. Ninety-eight patients (35.4%) were diagnosed with EV infections. The RT-PCR positive rate was the highest in throat swab samples (48.3%). The median age of patient was 4.7 years (range, 0.1-12.5 years). Aseptic meningitis (50, 51.0%) was the most common clinical manifestation; herpangina (22, 22.4%) and hand-foot-mouth disease (18, 18.4%). One hundred EVs were isolated from 98 patients and 20 genotypes of EV were identified; Echovirus 30 (28 cases, 28%), Enterovirus 71 (12 cases, 12%), Echovirus 25 (10 cases, 10%), Echovirus 9 (9 cases, 9%) and Coxsackievirus A6 (8 cases, 8%). Aseptic meningitis caused by Echovirus 30 was the most common manifestation in 2008. There was no complicated case caused by Enterovirus 71. CONCLUSION: This study showed the epidemiology of confirmed EV infection in children from 2006 to 2010. There is a need for continuous surveillance of EV infections and its clinical manifestations.
Centers for Disease Control and Prevention (U.S.) ; Child ; Echovirus 9 ; Enterovirus ; Enterovirus B, Human ; Enterovirus Infections ; Genotype ; Herpangina ; Humans ; Korea ; Meningitis, Aseptic ; Pharynx