• 제목/요약/키워드: serum antibody titers

검색결과 168건 처리시간 0.031초

House dust mite-specific immunoglobulin E and longitudinal exhaled nitric oxide measurements in children with atopic asthma

  • Lee, Youn Kyung;Yang, Sohyoung;Park, Joohyun;Kim, Heon;Hahn, Youn-Soo
    • Clinical and Experimental Pediatrics
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    • 제58권3호
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    • pp.89-95
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    • 2015
  • Purpose: House dust mite (HDM) has been suggested to be the most important aeroallergen responsible for atopic asthma in Korea. We aimed to investigate that specific IgE antibodies to HDM and other common indoor aeroallergens contribute differently to total serum IgE and show different relationships with longitudinal fractional exhaled nitric oxide (FeNO) measurements in Korean atopic asthmatic patients. Methods: A total of 193 children aged 8 to 16 years with intermittent or mild persistent atopic asthma were recruited. Sera were assayed for total IgE and specific IgE antibodies to HDM and other common indoor allergens. FeNO was serially measured 10 times or more over 2 years when subjects were not receiving controller medications. Results: In 152 children who completed the study, IgE antibodies to specific HDM were more prevalent than those to other common indoor aeroallergens. In addition, IgE antibody titers to HDM were the strongest contributor to total IgE increases. Furthermore, only HDM-specific IgE antibody titer significantly correlated with maximum FeNO (r=0.21, P=0.029) and the rate of FeNO higher than 21 parts per billion (ppb) (r=0.30, P=0.002). Eight patients (5%) were found to have maximum FeNO of 21 ppb or less, suggesting the presence of a low FeNO phenotype among atopic asthmatic patients. Conclusion: The quantity of HDM-specific IgE antibody provides a possible explanation for increases of total IgE and significantly correlates with the amount and frequency of FeNO increases in Korean atopic asthmatic patients.

Serological Survey of Major Avian Viral Diseases Related with Egg Production in Commercial Chicken Flocks in Korea

  • Jang, Hae-Sun;Lee, Hae-Rim;Koo, Bon-Sang;Jeon, Eun-Ok;Han, Moo-Sung;Min, Kyung-Cheol;Lee, Seung-Baek;Bae, Yeonji;Cho, Sun-Hyung;Mo, Jong-Suk;Kim, Jong-Nyeo;Mo, In-Pil
    • 한국가금학회지
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    • 제41권3호
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    • pp.173-179
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    • 2014
  • While use of mass rearing systems improved poultry production, chances of exposing to contagious diseases have been increased, making flocks more vulnerable to diseases. Diseases of interest which affects egg production adversely include Low pathogenic avian influenza (LPAI), Infectious bronchitis (IB), Avian meta-pneumoviral infection (aMPV) and Egg drop syndrome'76 (EDS'76). This report collected and analyzed 5,385 serum samples, which were collected from 1,330 different chicken flock, provided by Chungbuk National University, Avian Disease Laboratory at 2009. Serums were analyzed based on rearing stages; 0~1.3weeks (wks) (maternal antibody period), >1.3~3 wks (starting period), >3~10 wks (growing period), >10~22 wks (developing period), >22~40 wks (peak laying period), >40~60 wks (late laying period) and over 60 wks (post-molting period). Results showed the 99.7% of the tested flocks were immunized against ND and73.8%, 97.1%, 78,2% and 78% of the flocks were immunized against other 4 agents (LPAI, IB, EDS'76, aMPV). Maternal antibody was transferred to enough quantity for NDV. Generally, antibody titers which were developed at 22 weeks were stabilized permanently for life. In case of IB and aMPV, infection titer emerged as early as 10 weeks and the titer was increased from 99.4% to 100% for life. EDS76 showed increase in titers, reflecting decreased frequency of vaccination programs. Overall, this study displayed general trends of major viral disease in layers, but considering the trend of development of preventive measures and evolution of pathogens, conducting serological surveys on a regular basis is important.

Efficacy of Brucella abortus strain RB51 vaccine in Korean mongrel dogs against virulent strains of B. abortus biotype 1 and B. canis

  • Hur, Jin;Baek, Byeong-Kirl
    • 한국동물위생학회지
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    • 제33권1호
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    • pp.29-35
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    • 2010
  • This study was performed to test the hypothesis that Brucella abortus strain RB51 (SRB51) might protect Korean indigenous mongrel dog against challenge with either virulent B. abortus biotype 1 or B. canis. A total of 12 Korean mongrel dogs were divided into four groups (Group A, B, C and D). Dogs belonging to Group A and C were inoculated subcutaneously with $1{\times}10^9$ CFU of SRB51 in 1ml of sterile phosphate buffered saline (PBS). Dogs of Group B and D were inoculated subcutaneously with 1ml of sterile PBS as control. At 12 weeks post vaccination, dogs of Group A and B were challenged by oral inoculation of virulent strain of B. canis ($5.0{\times}10^9$ CFU) and dogs of Group C and D were challenged by oral inoculation of virulent strain of B. abortus biotype 1 ($4.4{\times}10^{10}$ CFU). The serum antibodies titers in all dogs were monitored at regular interval for eight weeks after challenge (AC) by standard tube agglutination test, plate agglutination test, rose bengal test, 2-mercaptoethanol rapid slide agglutination test and 2-mercaptoethanol tube agglutination test. No antibody titers in Group A and C was detected. Also, the challenge strains were not found from blood of all dogs of Group A and C from 1 week AC till the end of the experiment by culture and modified AMOS-PCR, whereas B. canis and B. abortus challenge strains were detected from blood of Group B and D, respectively. In addition, neither of two challenge bacteria was recovered from liver, spleen, kidneys, lymph nodes and reproductive tracts of Group A and C dogs after postmortem. However, B. canis and B. abortus challenge strains were isolated from these tissues of Group B and D, respectively. These data suggest that SRB51 could be a promising vaccine candidate for immunizing dogs to control canine brucellosis caused by B. canis or B. abortus.

Comparison of Immune Responses to the PCV2 Replicase-Capsid and Capsid Virus-Like Particle Vaccines in Mice

  • Jung, Bo-Kyoung;Kim, Hye-Ran;Lee, Young-Hyeon;Jang, Hyun;Chang, Kyung-Soo
    • Journal of Microbiology and Biotechnology
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    • 제29권3호
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    • pp.482-488
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    • 2019
  • Porcine circovirus type 2 (PCV2) is the causative agent of postweaning multisystemic wasting syndrome (PMWS) in pigs. Replicase (Rep) proteins are considered essential for viral replication. Capsid (Cap) protein is the primary immunogenic protein that induces protective immunity. Little is known about comparison on the immunogenicity of PCV2 Rep and Cap fusion protein and Cap protein. In the present study, recombinant baculoviruses expressing the Rep-Cap fusion protein (Bac-Rep-Cap) and the Cap protein (Bac-Cap) of PCV2 were constructed and confirmed with western blot and indirect fluorescence assay. Immunogenicities of the two recombinant proteins were tested in mice. The titers of antibodies were determined with a PCV2-specific enzyme-linked immunosorbent assay (ELISA) and a serum neutralization assay. The $IFN-{\gamma}$ response of immunized mice was measured by ELISA. The mice immunized with the Bac-Rep-Cap and Bac-Cap successfully produced Cap-specific immunoreaction. The mice immunized with the Bac-Cap developed higher PCV2-specific neutralizing antibody titers than mice injected with the Bac-Rep-Cap. $IFN-{\gamma}$ in the Bac-Rep-Cap group was increased compared to those in the Bac-Cap group. Vaccination of mice with the Bac-Rep-Cap showed significantly decreased protective efficacy compared to the Bac-Cap. Our findings will indubitably not only lead to a better understanding of the immunogenicity of PCV2, but also improved vaccines.

일개 대학 기숙사 거주 학생에 있어서 Chlamydophila pneumoniae의 혈청학적 감염률 조사 (Serological Investigation of the Infection Rate of Chlamydophila pneumonia among Residents of a Single University Dormitory)

  • 류재기;김현경;김동찬;이석준
    • 생명과학회지
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    • 제24권3호
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    • pp.318-322
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    • 2014
  • Chlamydophila pneumonia는 전 세계적으로 지역사회 폐렴을 유발하는 중요한 원인체이며 청소년과 젊은 성인에서는 경미한 폐렴 및 기관지염을 유발하나 면역력인 약한 소아나 기저 질환이 있는 노인층에서는 치명적인 질환을 일으킬 수 있다. 현재까지 국내에서 집단생활과 연관된 감염률에 대한 연구가 없는 실정이다. 본 연구에서는 미세면역형광법을 이용하여 대학 기숙사 거주자의 거주 기간에 따른 감염률을 조사하였다. C. pneumonia 과거 감염은 IgG 항체 역가 1:32 이상으로 하였다. 현재 감염은 IgG 항체 역가가 1:512 이상이거나, IgM 항체 역가가 1:16 이상이면서 류마토이드 인자 음성인 경우를 현재 감염으로 하였다. C. pneumonia 과거 감염률은 71.1%였으며, IgG와 IgM 항체를 이용한 현재 감염률은 각각 28.3%와 23.3%를 나타냈다. C. pneumoniae IgG 항체에 의한 과거 감염률은 집단생활이 1개월, 7개월, 13개월, 35개월 군에서 각각 50%, 71.4%, 66.7%, 89.5%로 나타났다. IgG 항체에 의한 현재 감염률은 1개월, 7개월, 13개월, 35개월 군에서 각각 50%, 28.6%, 33.3%, 10.5%를 보였으며 IgM 항체를 이용한 조사에서는 각각 41.7%, 28.6%, 26.7%, 5.3%를 나타냈다. 이상의 결과로 볼 때 집단생활자의 경우 C. pneumoniae 과거감염은 집단생활 경험의 개월 수가 많을수록 증가하였으며, 현재 감염율은 집단생활 초기에 증가하였다가 개월 수가 증가할수록 감소하였다. 본 연구는 C. pneumoniae의 집단시설 내의 혈청역학적 조사 및 예방법 연구에 있어 중요한 자료가 될 것으로 사료된다.

Seroprevalence of toxoplasmosis in the residents of Cheju island, Korea

  • Hyun-Jong YANG;Kwang-Nam JIN;Yong-Keun PARK;Seong-Chul HONG;Jong-Myon BAE
    • Parasites, Hosts and Diseases
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    • 제38권2호
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    • pp.91-93
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    • 2000
  • This study was performed to evaluate the epidemiological status of toxoplasmosis among the residents of Cheju island. The sera of local students from 18 high schools (boys 2110, girls 2460) and those of adults (474 admitted to Cheju Chungang General Hospital) were collected and checked for the IgG antibody titers against Toxoplasma gondii. Serum samples collected from both the students and adults showed sero-positive rate of 5.5% and 12.9%, respectively Although the rates were not significantly different between the sexes (5.4% for the boys and 5.5% for the girls attending school), the geographical difference showed a significant difference between the urban (4.6~6.9%) and rural areas (5.6-8.8%) (p<0.05) Based on the high positive rates, it should be necessary to control toxoplasmosis in Cheju island.

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B형 간염백신 접종시행 이후 혈청 Anti-HBs 양성율에 관한 조사 (The Positive Rate for Serum Anti-HBs in Korean since the Universal Carrying Out of HB Vaccination)

  • 이헌주;정문관;김종설
    • Journal of Yeungnam Medical Science
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    • 제4권1호
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    • pp.75-80
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    • 1987
  • 저자들은 국내에서 B형 간염백신이 사용된 이래 일반주민의 혈청 anti-HBs양성율과 접종이후 장시간이 경과된 후의 접종자들의 혈청 anti-HBs 양성율을 조사하기 위하여 1986년 1월 부터 1987년 3월까지 영남의료원 건강진단센터를 방문한 2,459명을 대상으로 한 문진과 검사결과를 토대로 하여 다음의 결과를 얻었다. 1. B형 간염백신 접종군과 비접종군에서의 혈청 HBsAg 양성율은 각각 0.7%와 9.6%였으며 전체검사자중에서는 8.0%로 나타났다. 2. B형 간염백신 접종군과 비접종군에서의 혈청 anti-HBs 양성율은 각각 66.3%와 47.9%였으며 전체검사자중 51.0%였다. 3. 1회나 2회의 기본접종만 받은 군에서의 혈청 anti-HBs 양성율은 각각 51.4%와 68.6%였고 3회의 기본접종을 받은 군에서는 67.6%의 양성율을 나타냈다. 따라서 현재 일반주민의 혈청 anti-HBs 양성율은 과거보다 높아져 있으나 특히 백신접종으로 항체를 획득한 후는 시간이 경과됨에 따라 역가가 저하되는 것으로 생각되며 접종후는 혈청 anti-HBs의 출현을 확인한 후에 필요시는 더욱 정밀한 방법으로의 검사와 각자의 상황에 따른 적절한 시기의 추가 접종이 요구될 것으로 생각된다.

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Association between periodontal bacteria and degenerative aortic stenosis: a pilot study

  • Kataoka, Akihisa;Katagiri, Sayaka;Kawashima, Hideyuki;Nagura, Fukuko;Nara, Yugo;Hioki, Hirofumi;Nakashima, Makoto;Sasaki, Naoki;Hatasa, Masahiro;Maekawa, Shogo;Ohsugi, Yujin;Shiba, Takahiko;Watanabe, Yusuke;Shimokawa, Tomoki;Iwata, Takanori;Kozuma, Ken
    • Journal of Periodontal and Implant Science
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    • 제51권4호
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    • pp.226-238
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    • 2021
  • Purpose: Although several reports have described the relationship between periodontal disease and cardiovascular disease, information about the association between periodontal disease and the progression of degenerative aortic stenosis (AS) is lacking. Therefore, we performed a retrospective, single-center, pilot study to provide insight into this potential association. Methods: Data from 45 consecutive patients (19 men; median age, 83 years) with mild or moderate degenerative aortic stenosis were analyzed for a mean observation period of 3.3±1.9 years. The total amount of Aggregatibacter actinomycetemcomitans and Porphyromonas gingivalis and titers of serum immunoglobulin G (IgG) against periodontal bacteria and high-sensitivity C-reactive protein (hs-CRP) were evaluated. Aortic valve area (AVA), maximal velocity (Vmax), mean pressure gradient (mean PG), and the Doppler velocity index (DVI) were evaluated. The change in each parameter per year ([ParameterLATEST-ParameterBASELINE]/Follow-up Years) was calculated from the retrospective follow-up echocardiographic data (baseline vs. the most recently collected data [latest]). Results: No correlation was found between the concentration of periodontopathic bacteria in the saliva and AS status/progression. The anti-P. gingivalis antibody titer in the serum showed a significant positive correlation with AVA and DVI. Additionally, there was a negative correlation between the anti-P. gingivalis IgG antibody titer and mean PG. The hs-CRP concentration showed positive correlations with Vmax and mean PG. Meanwhile, a negative correlation was observed between the anti-P. gingivalis IgG antibody titer and ΔAVA/year and Δmean PG/year. The hs-CRP concentration showed positive correlations with Vmax and mean PG, and it was significantly higher in patients with rapid aortic stenosis progression (ΔAVA/year <-0.1) than in their counterparts. Conclusions: Our results suggest that periodontopathic bacteria such as A. actinomycetemcomitans and P. gingivalis are not directly related to the status/progression of degenerative AS. However, inflammation and a lower immune response may be associated with disease progression.

Pathogenesis of Hantaan Virus Infection in Suckling Mice -Clinical, Virologic and Serologic Observations-

  • Kim, Gum-Ryong;Mckee, Jr, Kelly T.;Lee, Ho-Wang
    • 대한미생물학회지
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    • 제20권1호
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    • pp.115-125
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    • 1985
  • Hemorrhagic fever with renal syndrome (HFRS) is a debilitating disease of humans caused by Hantaan virus (HV), the prototype member of a newly proposed genus of Bunyaviridae. Studies of HV pathogenesis have been limited by the absence of a well defined model for a virus-induced disease state. In an attempt to devise a model for HV pathogenesis in laboratory rodents, newborn outbred suckling ICR mice were shown to be uniformly susceptible to lethal infection with non- mouse adapted HV by intracerebral (IC), intraperitoneal (IP), intramuscular (IM), and subcutaneous (SC) inoculation routes. Clinical coures, mean time to death, and fatal outcome were age-dependent. With an inoculum of 10 $LD_{50}$, mortality was 100% in mice infected within 72h of birth, but declined to 50% by 7 days. By 2-2.5 weeks, animals developed complete resistance to clinical disease. Virus was consistently detected in serum by day 6 post-infection in IC- and IP- inoculated animals, and reached peak levels of $10^5\;PFU/ml$ by day 8 Mice infected IM and SC showed delays in onset of viremia, but achieved similar titers. Immunofluorescent antibody appeared by 17-18 days, and neutralizing antibody by 15 days, in all experimental groups. Two of 8 inbred mouse strains were identified as resistant to clinical disease : SJL/J and A/J. Manipulation of this model will allow investigation of natural rodent pathogenesis with HV, as well as offer insight into disease mechanisms and therapy of HFRS.

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돼지생식기호흡기증후군 바이러스가 흉막폐렴에 미치는 영향 - 혈청학적 및 백혈구아군 분포율에 관한 연구 - (Effect of porcine reproductive and respiratory syndrome virus on pigs with pleuropneumonia - Studies on serology and proportion of porcine subpopulation of peripheral blood -)

  • 정현규;박용호;한정희
    • 한국동물위생학회지
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    • 제30권1호
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    • pp.51-66
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    • 2007
  • The purpose of this study was to evaluate the effect of a subsequent infection of porcine reproductive and respiratory syndrome(PRRS) virus to pigs with A pleuropneumonia. Twenty three 7-week-old commercial pigs were infected intratracheally with PRRS virus and/or A pleuropneumoniae serotype 5. Serum antibody titers were examined by an enzyme-linked immunosorbent assay(ELISA) and proportion of porcine leukocyte subpopulations in peripheral blood was examined by flow cytometry. In this experiment, antibodies against PRRS virus and A pleuropneumoniae were detected at 2 weeks and 1 week postinfection and the number of antibody positive pigs were gradually increased. And in proportion to leukocyte subpopulations in peripheral blood of pigs infected with A pleuropneumoniae compared with pigs administrated with saline, the proportion of PoCD4 and N cells were increased(P<0.1). Furthermore, in proportion to leukocyte subpopulations in peripheral blood of pigs infected with PRRS virus followed by A pleuropneumoniae compared with pigs administrated with saline, the proportion of MHC class II, PoCD4 and B cells were significantly increased(P<0.1). The results indicated that dual infection with PRRS virus and A pleuropneumoniae induced the stronger immune responses associated with macrophages and Th cells in pigs than single infection with PRRS virus or A pleuropneumoniae.