Purpose : We evaluated and compared clinical and laboratory characteristics of patients with measles in three epidemics(1989~90, 1993~94, and 2000~01) in Daejeon, Korea. Methods : Retrospective analyses were performed using medical records of 520 patients with measles at the Catholic University of Korea, Daejeon St. Mary's Hospital during three epidemics. We divided the subjects into three groups, i.e., those who admitted during 1989~1990(group I, 116 patients), those during 1993~1994(group II, 127 patients), and those during 2000~2001(group III, 277 patients). We compared clinical, demographic and laboratory characteristics among these 3 groups. Results : In age distribution, ratios of under 2 years of age in three groups were 61%, 58% and 57%, respectively with no statistical differences. However there are differences in age distribution above 2 years of age, as 21% in 2~5 years of group I, 28% in 6~9 years of group II, and 21% above 10 years of group III. No statistical differences were present between 3 groups in the male to female ratio, MMR vaccination rate in above 2 years of age, duration of fever, incidence of hepatitis. Hospitalization days(P=0.019) and rate of complications(P=0.012) were longer and higher in group I than in group III. Conclusion : In three epidemics, the second peak age group(except 0~1 year) of children above 2 years of age who had mostly received MMR vaccination showed a trend for increased age with increasing time(statistical difference). This result suggest that secondary vaccine failure may have a role in each epidemics. So, if measles outbreaks is happened in the future, we will have consideration in this aspect.
Choung, Ju Mi;Kim, Jung Chul;Eun, So Hee;Hwang, Pyoung Han;Nyhambat, B.;Kilgore, P.;Kim, Jung Soo
Clinical and Experimental Pediatrics
/
v.45
no.10
/
pp.1234-1240
/
2002
Purpose : This study was carried out to obtain the vaccination rate and age appropriateness of vaccination in children under five years of age in Jeonbuk province. Methods : Eight hundred and fifty infants and children were enrolled in this study. Vaccination rate(Number of vaccinees/Number of subjects), places of vaccination, age appropriateness of vacination were examined by either vaccine record review or interview with parents or guardians. Results : The salient features of the findings were as follows : All subjects were aged under five and mostly under two years of age(68.8%). Places of vaccination were health centers or subcenters( 50.4%), private clinics(44.3%), and general hospitals(5.3%). Routine vaccinations such as BCG, hepatitis B vaccine(HBV), diphtheria, tetanus, acellular pertussis(DTaP) and Trivalent Oral Polio Vaccine(TOPV), measles, mumps, rubella(MMR), and Japaneses B encephalitis(JBE) were vaccinated mostly in health centers or subcenters, while chickenpox(CHP) and haemophilus influenzae vaccines(Hib), which are not routine in Korea, were vaccinated in private clinics. The vaccination rates of BCG(99.2%), HBV(93.5%) and DTaP(96.1%) were very high. But those of MMR(83.7%), CHP(72.5%), JBE(50.2%), and Hib(15.8%) were lower than expected. Considering the age appropriateness of vaccination, some infants and children were not appropriately vaccinated(vaccination rate/age appropriateness of vaccine; HBV, 93.5%/88.4% : DTaP, 94.6%/73.1% : JBE, 50.2%/ 18.5%). Conclusion : The vaccination rate of BCG, HBV, DTaP and TOPV was very high, but MMR, CHP, JBE, and Hib vaccination rate was not high enough to be able to protect against epidemic. We should pay more attention to vaccinating children, and there is a need for a program that will enhance coverage for vaccines.
Kim, Min-Kyung;Kim, In-Ah;Jung, Min-Hee;Han, Myung-Ki;Park, Kie-Young;Kim, Bong-Seong;Jin, Hyun-Seong
Neonatal Medicine
/
v.18
no.2
/
pp.353-358
/
2011
Purpose: The goal of this study was to compare the efficacy of oral 25% dextrose treatment or/and pacifier for analgesia in healthy newborns during intramuscular injection of a hepatitis B vaccine. Methods: A prospective, randomized, partially blinded, clinical trial was performed in 132 healthy newborns. They were assigned randomly to 4 treatment groups: control group (2 mL distilled water), dextrose group (2 mL 25% dextrose), pacifier group, dextrose+pacifier group (pacifier coating with 25% dextrose) during intramuscular injection of hepatitis B vaccine. For all groups, Neonatal Infant Pain Scale (NIPS), Neonatal Facial Coding System (NFCS), Premature Infant Pain Profile (PIPP) scores were evaluated before the injection, during the injection, and at 2 minutes after the injection. Pain scores were compared among the 4 groups. Results: Maternal and neonatal characteristics were similar among the 4 groups. 25% dextrose treatment led to lower NIPS pain scores during injection (6.4${\pm}$0.9 vs. 5.5${\pm}$1.7, P=0.01) and after injection (1.6${\pm}$2.0 vs. 0.6${\pm}$0.9, P=0.01) and NFCS pain scores after injection (1.5${\pm}$2.3 vs. 0.7${\pm}$0.8, P=0.04) than control group. The number of neonates who feel the pain (indication of scores: NIPS${\geq}$4, NFCS${\geq}$3) decreased (9 (23.1%) vs. 0 (0%), P=0.04 via NIPS, 7 (17.9%) vs. 0 (0%), P=0.02 via NFCS). However, all treatment groups did not decreased PIPP scores, compared with the control group. Conclusion: Oral 25% dextrose is effective than distilled water or using pacifier with or without 25% dextrose in reducing pain during intramuscular injection of hepatitis B vaccinations. Further study based on this preliminary study need about nonpharmacologic management of pain in newborns.
Ahn, Jong Gyun;Choi, Seong Yeol;Kim, Dong Soo;Kim, Ki Hwan
Pediatric Infection and Vaccine
/
v.19
no.1
/
pp.19-27
/
2012
Purpose : As the number of children who attend child care centers has increased, concerns has increased about the effect of child day care on childhood illness. This study was conducted to examine the relationship between experience in child care and common infectious diseases in children under 5 years of age. Methods : Data were collected by surveying 1,000 respondents with children under age 5 through online interviews using a structured questionnaire. The contents of the survey were composed of demographic characteristics, child care facilities usage, experience in infectious diseases, and immunization status Results : Among the 1,000 children <5 years of age, 78.5% attended a child care facility. Rates of common communicable illnesses were higher in children in child care than for children reared exclusively at home. The predominant communicable diseases which the respondents' children experienced, in order of decreasing frequency, were gastroenteritis (47.1%), otitis media (41.8%) and pneumonia (19.1%). The immunization rate of vaccines that are not included the national immunization program (NIP) (Haemophilus influenzae type b vaccine - 76.6%, hepatitis A vaccine - 63.3%, pneumococcal vaccine - 59.4%, rotavirus vaccine - 43.1%) was lower than that of the NIP vaccines (90.4%) Conclusion : Children in child care experience more bouts of common infectious disease, so nationwide policies to prevent or to control the spread of infectious agents in a child-care should be available and appropriate immunization should be emphasized as the most effective method for the control of infectious disease for children.
Cho, Ja Young;Yi, Yi Kyaw;Seong, Mi So;Cheong, JaeHun
Journal of Life Science
/
v.32
no.2
/
pp.94-100
/
2022
Chronic infection by hepatitis B virus (HBV) greatly increases the risk for liver cirrhosis and hepatocellular carcinoma (HCC). The outcome of HBV infection is shaped by the complex interplay of the mode of transmission, host genetic factors, viral genotype, adaptive mutations, and environmental factors. The pregenomic RNA transcription of HBV for their replication is regulated by the core promoter activation. Core promoter mutations have been the reason for acute liver failure and are associated with HCC development. We obtained HBV genes from a patient in Myanmar who was infected with HBV and identified gene variations in the core promoter region. For measuring the relative transactivation activity of the core promoter, we prepared the core-promoter reporter construct. Among the gene variations of the core promoter, the mutations of C1731T and G1806A were associated with increase in the transactivation of the HBV core promoter. Through computer analysis for searching for a tentative transcription factor binding site, we showed that the mutations of C1713T and G1806A newly created C/EBPβ and XBP1-responsive elements of the core promoter, respectively. The ectopic expression of C/EBPβ largely increased the HBV core promoter containing the C1713T mutation and that of XBP1 activated the M95 promoter containing the G1806A mutation. Our efforts to treat and prevent HBV infections are hampered by the emergence of drug-resistant mutations and vaccine-escape mutations. Our results provide the biological properties and clinical significance of specific HBV core promoter mutations.
Many investigators have been pursuing various attempts so far to produce hepatitis B surface antigen(HBsAg) vaccines using the techniques such as isolation from plasma of chronic HBsAg carrier, recombinant DNA technique or preparation of synthetic peptides specific for immunogenic determinants. Hepatitis B virus can not grow on any cell lines by the tissue culture technique at the present time. The plasma of chronic HBsAg carrier is expensive and its source is limited. The HBsAg from the recombinant DNA technique gave still very low yield. Another approach, therefore, has been initiated to develop a synthetic hepatitis B virus vaccine. The possible use of several distinct synthetic vaccines in prophylaxis can be facilitated by availability of full synthetic immunogens. Peptides synthesized for potential application as antiviral vaccines have been mostly tested in the form of conjugates with carrier proteins, although the free synthetic peptide can be immunogenic. To understand basic knowledges on the antigenicity and immunogenicity of a synthetic peptide specific for major immunogenic determinant of HBsAg, a nonapeptide, $H_2N^{139}Cys-Thr-Lys-Pro-Thr-Asp-Gly-^{146}Asn-Aba$ COOH, which corresponds to HBsAg amino acid residues 139 to 147, was synthesized by the Merrifield's solid-phase method with a slight modification. The antigenicity and immunogenicity of this specific synthetic peptide were examined comparing with purified plasma-derived natural HBsAg. The results obtained are as follows; 1. The peptide synthesized showed the identical amino acid composition to the theoretical value. The degree of purification and molecular weight were acertained by methods of high performance liquid chromatography and mass spectrometry. 2. Using m-maleimidobenzoyl-N-hydroxysuccinimide ester as a conjugating agent, the synthetic peptide was conjugated to rabbit albumin and ${\gamma}$-globulin, tetanus and diphtheria toxoids, and keyhole limpet hemocyanin. Their conjugation yields were 8.3, 9.5, 15.8, 13.5, and 11.2%, respectively. 3. The natural HBsAg was purified from plasma of chronic HBsAg carrier. By the electron microscopic observation of the purified natural HBsAg preparation, no Dane particles were observed and the preparation showed negative DNA polymerase activity. 4. Antigenicity of the synthetic peptide and the plasma-derived natural HBsAg was determined by competition radioimmunoassay using $^{125}I$-natural HBsAg. Their 50% inhibitions appeared as $90{\mu}g/ml$ and $0.12{\mu}g/ml$ for the synthetic peptide and the natural HBsAg, respectively. This indicates that the former was about 750-fold less antigenic than the latter. 5. Immunogenicity of the synthetic peptide was determined by administering the peptide-carrier conjugates into rabbits with and without Freund's complete adjuvant. Regardless the carrier proteins and adjuvant, positive immune responses to the synthetic peptide were observed. The higher antibody titers, however, were shown in the groups administered with Freund's complete adjuvant. 6. Immunizing dose 50% in mice of the various peptide-carrier conjugates was 5.47, 6.00, 65.16, 31.25 and $13.03{\mu}g/dose$ for rabbit albumin and ${\gamma}$-globulin, tetanus and diphtheria toxoids, and keyhole limpet hemocyanin, respectively, while the natural HBsAg showed $0.65{\mu}g/dose$. 7. It was postulated that homologous proteins prefer to heterologous ones as the carriers.
Journal of agricultural medicine and community health
/
v.23
no.2
/
pp.205-213
/
1998
In order to find out the status of routine-immunization in a rural area, this study was performed, through analyzing the data which was obtained from the immunization register of infants who was born at Su-Dong myun in 1996 and 1997, managed by Su-dong Myun health subcenter. The results are as follows. 1. B.C.G immunization rate was the highest such as 52.2% within 1 month and next order such 34.8% at 2 month in 1996. In 1997, the highest such as 73.8%, almost all, within 1 month. 2. D.P.T immunization rate in 1996 showed, almost all, the highest at 3 month(79.4%) for 1st dose and at 5 month(78.4%) for 2nd dose. However, the rate for 3rd dose showed the highest at 7 month(51.4%), and next order at 8 month(35.1%) and at 6 month(13.5%). D.P.T immunization rate in 1997, similarly showed the highest at 3 month(81.8%) for 1st dose, at 5 month(71.2%) for 2nd dose and at 7 month(71.4%) for 3rd dose. 3. Hepatitis B immunization rate showed the highest at birth at once or within one week(87.0%) for 1st dose in 1996 and (94.7%) in 1997. The rate for 2nd dose showed the highest at 2 month(51.7%) in 1996 and (50.0%) in 1997, and next order at 1 month(44.8%) in 1996 and (34.4%) in 1997. The rate for 3rd dose showed the highest at 3 month(54.8%) in 1996 and 5 month(54.8%) in 1997, and next order at 5 month(25.8%) in 1996 and at 3 month(26.0%) in 1997. 4. Measles immunization rate was 76.1% in 1996. The rate(76.1%) by the kind of vaccine was the highest with measles-MMR(34.8%), and with MMR(32.6%) and next order with measles(8.7%). The rate by measles immunization time(month) was the highest such as 35.0% at 9 month and 10 month respectively and the rate by MMR was the highest at 16 month(35.5%), and 15 month(22.5%), 13 month (12.9%) and 14 month(12.9%) in next order.
Kwon, Young Se;Hong, Young Jin;Choe, Yon Ho;Kim, Soon Ki;Son, Byong Kwan;Kang, Moon Su;Pai, Soo Hwan;Hong, Kwang Sun
Pediatric Infection and Vaccine
/
v.5
no.2
/
pp.239-244
/
1998
Purpose : The incidence of hepatitis A virus infection in Korea has decreased recently. However, the prevalence in children and young adults is on an increasing trend in Inchon-Kyunggi prefecture. Economic development that leads to better living conditions and improves hygiene facilities has reduced the rate of HAV infection. This study was designed to evaluate the recent seroprevalence rate of hepatitis A in children and adolescents. Methods : Study population consisted of 612 children and adolescents aged 1 to 17 years in Inchon-Kyunggi prefecture. Serum samples were collected between 1996 and 1997 and tested for anti HAV by Microparticle Enzyme Immunoassay(MEIA). Results : According to age, the seropositive rates were 10.5%(male 13%, female 6.7%) in 1 year-old group, 0% in 3, 5, 11 and 13 year-old group, 6%(male 8%, female 4%) in 15 year-old group, and 11%(male 14%, female 8%) in 17 year-old group. Conclusion : This study showed that seropositive rate of HAV infection increased with age. While it revealed extremely low incidence of HAV infection in children less than 13 years old, they are also likely 10 be exposed 10 the infection. Our findings suggest that the effective administration of vaccination is needed in selected and high risk groups.
Lee, E. K.;Ahn, S. J.;Yoo, C. H.;Ryu, K.;Jeon, J. Y.;Lee, H. I.;Choi, S. C.;Lee, Y. S.
KSBB Journal
/
v.17
no.1
/
pp.20-25
/
2002
We performed a basic experiment for rapid, on-line, real-time measurement of HBsAg by using a surface plasmon resonance biosensor to quantify the recognition and interaction of biomolecules. We immobilized the anti-HBsAg polyclonal antibody to the dextran layer on a CM5 chip surface which was pre-activated by N-hydroxysuccinimide for amine coupling. The binding of the HBsAg to the immobilized antibody was measured by the mass increase detected by the change in the SPR signal. The binding characteristics between HBsAg and its antibody followed typical monolayer adsorption isotherm. When the entire immobilized antibody was interacted, there was no additional, non-specific binding observed, which suggested the biointeraction was very specific as expected and independent of the ligand density. No significant steric hindrance was observed at 17.6 nm/$mm^2$ immobilization density. The relationship between the HBsAg concentration in the sample solution and the antigen bound to the chip surface was linear up to ca. $40\mu\textrm{g}$/mL, which is much wider than that of the ELISA method. It appeared the antigen-antibody binding was increased as the immobilized ligand density increased, but verification is warranted. This study showed the potential of this biosensor-based method as a rapid, simple, multi-sample, on-line assay. Once properly validated, it can serve as a more powerful method for HBsAg quantification replacing the current ELISA method.
Purpose : Ttransfusion transmitted virus(TTV) is a circular DNA and consists of diverse genotypes and variants. The pathogenecity of TTV is still unclear. Recently another circular single stranded DNA virus, distantly related to TTV was isolated from the sera of blood donors, designated as Transfusion transmitted virus like minivirus(TLMV). TTV and TLMV show greater sequence divergence from each other than between genotypes of TTV. We planned to know the prevalence of TLMV in children. Methods : TLMV DNA was detected by PCR primers from noncoding region of the genome in 88 children without hepatitis, aged 0~15 years. PCR products derived from 10 children were directly sequenced and phylogenetic analysis was undertaken. Results : TLMV DNA was detected in 49% of 88 children without hepatitis. The prevalence of TLMV varied with age : <1 y, 16%(4/25); 1~3 y, 62%(18/29); 4~6 y, 43%(7/16); 7~9 y. 16%(1/6); 10~15 y, 66%(8/12). Mixed infection with TTV was confirmed in 22% of 88 children. Pyhlogenetic analysis of 10 TLMV sequences showed much heterogeneity compared to sequences of GenBank. Conclusion : TLMV prevalence in children was 49% in Korean children. Our TLMV sequence did not cluster in any sequence of TLMV in the GenBank.
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