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Abstract
Objective: Rubella is a very diffusive but relatively benign infectious disease unless contracted during pregnancy, when it causes congenital rubella syndrome. The aim of this research was to determine the prevalence and titer of antirubella antibodies in a population of future healthcare workers (students at the school of medicine). Methods: The cohort consisted of 11,022 students who underwent antibody analysis after the presentation of a vaccine certificate. Results: Vaccination compliance was very high, particularly in younger students (born after 1995), reaching almost 100% (at least one dose). Unvaccinated students born before 1990 had high seropositivity (>95%), but this percentage dropped to zero among the youngest students. Variables affecting antibody titer included year of birth and sex. Considering only vaccinated students, a greater antibody response was observed if the vaccine was administered between 8 and 10 years of age. Female sex was associated with more significant (p < 0.0001) positivity and higher antibody titer after one and two doses. However, this difference appeared less consistent in relation to year of birth. Conclusions: The studied population exhibited excellent vaccination compliance, high seropositivity, and high antibody titer. Vaccine and immune coverage were higher than what is deemed necessary to achieve herd immunity.
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Affiliation(s)
- Andrea Trevisan
- Department of Cardiac Thoracic Vascular Sciences and Public Health, University of Padova (Italy), Padova, Italy
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Patić A, Štrbac M, Petrović V, Milošević V, Ristić M, Hrnjaković Cvjetković I, Medić S. Seroepidemiological study of rubella in Vojvodina, Serbia: 24 years after the introduction of the MMR vaccine in the national immunization programme. PLoS One 2020; 15:e0227413. [PMID: 31929584 PMCID: PMC6957133 DOI: 10.1371/journal.pone.0227413] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Accepted: 12/18/2019] [Indexed: 11/18/2022] Open
Abstract
Although rubella is usually a mild childhood disease, this infection in early pregnancy poses a serious problem due to its teratogenic effect. The goal of interrupted circulation and elimination of rubella virus was achieved in many countries in the world. The aim of this study was to determine the status of rubella immunity in Vojvodina and evaluate Serbia's progress toward this goal. A total of 3404 residual serum samples from patients of all ages (1 to 84 years) were included in the study. Samples were collected between May 2015 and December 2017 in Vojvodina. Rubella IgG antibodies were determined using an indirect chemiluminescent immunoassay. Percentage of participants seropositive for rubella antibodies was 92.9% in the entire sample. The highest number of seronegatives was in the youngest (1 year) age group (44.7%), followed by the group aged 24-49 (6.4%) and 2-11 years (6.2%). The absence of a higher percentage of children with protective anti-rubella antibodies in the group aged 2-11 can be explained by a lower immunization coverage during certain years. Participants in the group aged 24-49 were born during the pre-vaccination period with lower rubella incidence, leading to the conclusion that not all individuals of that age came into a contact with the virus. Comparing levels of anti-rubella IgG antibodies of seropositive males and females of different ages reveals that the immunity after a contact with the virus and a previously acquired infection is stronger than the immunity after the vaccination. Although the incidence rate of rubella in Vojvodina has been low for the last ten years, there is still a risk of an outbreak due to a decrease in immunization coverage. This study shows that the percentage of susceptible individuals is high, especially considering women aged 24-49, and that additional ("catch-up") immunization is required.
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Affiliation(s)
- Aleksandra Patić
- Faculty of Medicine, University of Novi Sad, Novi Sad, Serbia
- Centre for Virology, Institute of Public Health of Vojvodina, Novi Sad, Serbia
- * E-mail:
| | - Mirjana Štrbac
- Centre for Disease Control and Prevention, Institute of Public Health of Vojvodina, Novi Sad, Serbia
| | - Vladimir Petrović
- Faculty of Medicine, University of Novi Sad, Novi Sad, Serbia
- Centre for Disease Control and Prevention, Institute of Public Health of Vojvodina, Novi Sad, Serbia
| | - Vesna Milošević
- Faculty of Medicine, University of Novi Sad, Novi Sad, Serbia
- Centre for Virology, Institute of Public Health of Vojvodina, Novi Sad, Serbia
| | - Mioljub Ristić
- Faculty of Medicine, University of Novi Sad, Novi Sad, Serbia
- Centre for Disease Control and Prevention, Institute of Public Health of Vojvodina, Novi Sad, Serbia
| | - Ivana Hrnjaković Cvjetković
- Faculty of Medicine, University of Novi Sad, Novi Sad, Serbia
- Centre for Virology, Institute of Public Health of Vojvodina, Novi Sad, Serbia
| | - Snežana Medić
- Faculty of Medicine, University of Novi Sad, Novi Sad, Serbia
- Centre for Disease Control and Prevention, Institute of Public Health of Vojvodina, Novi Sad, Serbia
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Abstract
OBJECTIVES The aim of this study was to investigate the immunity against rubella using the serological status of rubella-specific IgG antibodies (antirubella IgG) in Korean women of childbearing age (15-49 years). DESIGN Retrospective cross-sectional study. SETTING Population-based cross-sectional study in South Korea. PARTICIPANTS Between January 2010 and December 2017, test results from Korean women aged 15-49 years who had visited an obstetric private clinic (nationwide institutions) and had requested rubella-specific IgG antibody tests from Green Cross Laboratories were obtained from the laboratory information system. RESULTS Between 2010 and 2017, antirubella IgG test results from 328 426 Korean women aged 15-49 years who had visited private obstetric clinics (1438 institutions nationwide) were retrospectively analysed by tested year, age, cohort and geographic regions. Over the 8-year study period, the rate of unimmunised women ranged from 7.8% to 9.7%. Multivariable-adjusted logistic regression models showed that the odds of being immune to rubella (positive and equivocal results of antirubella IgG test) were lower in 2017 compared with 2010, in women in their 40s, in a pre-catch-up cohort and in women living in Incheon, Busan, South Gyeongsang, North and South Jeolla and Jeju provinces (p<0.0001). CONCLUSIONS In consideration of the factors associated with prevalence of women unimmunised to rubella, future public health efforts should be focused on catch-up activities. The results of this study could be used to strengthen disease control and prevent rubella, including a nationwide immunisation programme.
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Affiliation(s)
- Rihwa Choi
- Laboratory Medicine, Green Cross Laboratories, Yongin, Gyeonggi-do, Republic of Korea
- Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Gangnam-gu, Seoul, Republic of Korea
| | - Yejin Oh
- Laboratory Medicine, Green Cross Laboratories, Yongin, Gyeonggi-do, Republic of Korea
| | - Youngju Oh
- Laboratory Medicine, Green Cross Laboratories, Yongin, Gyeonggi-do, Republic of Korea
| | - Sung Ho Kim
- Laboratory Medicine, Green Cross Laboratories, Yongin, Gyeonggi-do, Republic of Korea
| | - Sang Gon Lee
- Laboratory Medicine, Green Cross Laboratories, Yongin, Gyeonggi-do, Republic of Korea
| | - Eun Hee Lee
- Green Cross Laboratories, Yongin, Gyeonggi-do, Republic of Korea
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Marchi S, Viviani S, Montomoli E, Trombetta CM. Elimination of congenital rubella: a seroprevalence study of pregnant women and women of childbearing age in Italy. Hum Vaccin Immunother 2019; 16:895-898. [PMID: 31674859 PMCID: PMC7227624 DOI: 10.1080/21645515.2019.1688041] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Prevention of congenital rubella is achieved by vaccination of susceptible women of childbearing age. In Italy, the National Plan for Measles and Congenital Rubella Elimination 2010–2015 implemented catch-up vaccination activities targeting susceptible adolescents and young adults, including women of childbearing age. The aim of this study was to assess the immunity against rubella in women of childbearing age in Tuscany (Central Italy) and Apulia (Southern Italy) and pregnant women in Apulia after the implementation of the National Plan for Measles and Congenital Rubella Elimination. Overall, anti-rubella IgG prevalence in women of childbearing age samples was 88.6% in Tuscany and 84.3% in Apulia. The lowest prevalence was observed in samples of 26–35 years old women of childbearing age in Apulia with 77.8%. Only 62.7% of samples from 26–35 years old pregnant women had IgG against rubella, and one sample out of 95 was positive to IgM. The findings of this study highlight the need for increasing awareness on the risk of contracting rubella infection during pregnancy and implement vaccination strategies to create opportunities for administration of rubella containing vaccines in young girls and women of childbearing age.
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Affiliation(s)
- Serena Marchi
- Department of Molecular and Developmental Medicine, University of Siena, Siena, Italy
| | - Simonetta Viviani
- Department of Molecular and Developmental Medicine, University of Siena, Siena, Italy
| | - Emanuele Montomoli
- Department of Molecular and Developmental Medicine, University of Siena, Siena, Italy.,VisMederi srl, Siena, Italy
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Karade S, Sen S, Sashindran VK, Sharma P, Kanitkar M. Measles, mumps, and rubella: A cross-sectional study of susceptibility to vaccine-preventable diseases among young people in India. Med J Armed Forces India 2019; 75:70-73. [PMID: 30705481 DOI: 10.1016/j.mjafi.2018.12.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Accepted: 12/21/2018] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Global elimination of vaccine preventable diseases, such as measles, mumps and rubella is a priority. Many countries have reported diminishing of antibody titres against these diseases among young population as immunization coverage of adolescents and adults in not monitored. The objective of this study was to determine the susceptibility against measles, mumps and rubella among young adults. METHODS In this cross-sectional study serological evidence of susceptibility to measles, mumps and rubella was determined by qualitative detection of IgG antibody titres by commercially available enzyme linked florescence assay (VIDAS, bioMerieux) in serum samples young adults. RESULTS A total of 335 young individuals (mean age: 20.54 ± 1.37 years) participated voluntarily between May 2017 to September 2018, of which 183 (54.63%) were males. Seroprotection against measles, mumps and rubella were 87.16%, 82.69% and 79.10% respectively. CONCLUSION Serological surveillance is important to monitor immune status in population. Susceptibility of young adults to measles, mumps, and rubella indicates need for booster vaccination. With the recent launch of measles-rubella vaccination campaign in India, country specific data will be required to plan periodicity of such campaign, which in turn would be based on accumulation of susceptible individuals in a community. Lastly, inclusion of mumps vaccine in the national universal immunization program needs consideration.
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Affiliation(s)
- Santosh Karade
- Assistant Professor, Department of Microbiology, Armed Forces Medical College, Pune 411040, India
| | - Sourav Sen
- Professor & Head, Department of Microbiology, Armed Forces Medical College, Pune 411040, India
| | | | - Punita Sharma
- Principal, College of Nursing, Armed Forces Medical College, Pune 411040, India
| | - Madhuri Kanitkar
- Dean and Deputy Commandant, Armed Forces Medical College, Pune 411040, India
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Siira L, Nøkleby H, Barlinn R, Riise ØR, Aaberge IS, Dudman SG. Response to third rubella vaccine dose. Hum Vaccin Immunother 2018; 14:2472-2477. [PMID: 29771601 PMCID: PMC6284511 DOI: 10.1080/21645515.2018.1475814] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Accepted: 05/05/2018] [Indexed: 02/07/2023] Open
Abstract
Limited data exist on the immunogenicity of a third dose of the measles, mumps, and rubella vaccine (MMR). In this study, our aim was to evaluate the long-term rubella immunogenicity afforded by two childhood MMR doses of the Norwegian vaccination program in a cohort of conscripts and to determine the effect of an additional dose of MMR vaccine, in order to inform vaccination policy. Blood samples from Norwegian conscripts (n = 495) taken both before and eight months after administration of a dose of MMR vaccine were tested using an enzyme immunoassay to measure anti-rubella IgG. Concentrations <5 IU/mL were regarded as negative, 5.0-9.9 IU/mL as equivocal, and ≥10 IU/mL as positive. Overall, the seropositivity before vaccination was 84.6%, and 99.0% of the conscripts had anti-rubella IgG concentrations ≥5 IU/mL. The seropositivity after vaccination was 94.5%, and 99.8% of the conscripts had antibody concentrations ≥5 IU/mL. The geometrical mean IgG concentrations increased from 21.4 IU/mL before vaccination to 28.9 IU/mL after. Four out of five conscripts, with seronegative concentrations before administrations of an additional MMR dose, had equivocal or seropositive results following vaccination. The cohort of young adults in Norway, which was eligible for two childhood MMR doses, was protected against rubella, and efforts should be made to maintain high vaccine coverage to ensure immunity in the future. A third dose of MMR administered in early adulthood led to an increase in the antibody concentration in our cohort and seroconversion for the majority of seronegative persons.
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Affiliation(s)
- Lotta Siira
- Division for Infection Control and Environmental Health, Norwegian Institute of Public Health (NIPH), Oslo, Norway
- European Program for Public Health Microbiology Training (EUPHEM), European Centre for Disease Prevention and Control, (ECDC), Stockholm, Sweden
| | - Hanne Nøkleby
- Division for Infection Control and Environmental Health, Norwegian Institute of Public Health (NIPH), Oslo, Norway
| | - Regine Barlinn
- Division for Infection Control and Environmental Health, Norwegian Institute of Public Health (NIPH), Oslo, Norway
| | - Øystein R. Riise
- Division for Infection Control and Environmental Health, Norwegian Institute of Public Health (NIPH), Oslo, Norway
| | - Ingeborg S. Aaberge
- Division for Infection Control and Environmental Health, Norwegian Institute of Public Health (NIPH), Oslo, Norway
| | - Susanne G. Dudman
- Division for Infection Control and Environmental Health, Norwegian Institute of Public Health (NIPH), Oslo, Norway
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Gallone MS, Gallone MF, Larocca AMV, Germinario C, Tafuri S. Erratum to: lack of immunity against rubella among Italian young adults. BMC Infect Dis 2017; 17:630. [PMID: 28927377 DOI: 10.1186/s12879-017-2724-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Accepted: 09/11/2017] [Indexed: 11/24/2022] Open
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