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Mercogliano M, Valdecantos RL, Fevola G, Sorrentino M, Buonocore G, Triassi M, Palladino R. An ecological analysis of socio-economic determinants associated with paediatric vaccination coverage in the Campania Region: A population-based study, years 2003-2017. Vaccine X 2024; 18:100482. [PMID: 38585381 PMCID: PMC10997839 DOI: 10.1016/j.jvacx.2024.100482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2024] [Revised: 03/26/2024] [Accepted: 03/27/2024] [Indexed: 04/09/2024] Open
Abstract
Introduction Vaccines are the most cost-effective and straightforward intervention against severe infectious diseases. However, in Europe and in Italy, paediatric vaccination coverage for certain vaccines remains suboptimal, with considerable regional differences in Italy. Vaccine coverage varies significantly due to socio-economic and organisational factors. Aim of this study was to assess the influence of the Deprivation Index, the density of General Practitioners and General Paediatricians per inhabitants on the coverage of both mandatory and non-mandatory paediatric vaccinations across local health authorities and health districts in the Campania Region for birth cohorts from 2001 to 2015. Materials and methods Population-based, ecological time series analysis focusing on the Campania Region, most populous region in the south of Italy. Vaccination coverage data were extracted from the regional immunization database, whilst information on the Deprivation Index and number of primary care doctors and primary care paediatricians per local health district were extracted from public health records. Univariate descriptive statistics were employed to describe study characteristics, as appropriate, whilst and mixed-effect linear regression models were employed to assess the associations between variables of interest and vaccination coverage. Results Overall vaccination coverage has generally increased, except for the MMR vaccine, which showed coverage fluctuations. An increase in the Deprivation Index, indicative of less favourable socio-economic conditions, was associated with decreased vaccination coverage in the 24-month age group for some mandatory vaccines (DTaP: Coef -0.97, 95% CI -1.77 | -0.17; Poliomyelitis: Coef -0.98, 95% CI -1.78 | -0.17; Hepatitis B: Coef -0.90, 95% CI -1.71 | -0.10). Moreover, areas with a greater density of General Paediatricians per inhabitants saw increased coverage for Haemophilus influenzae type b in the 6-year age group (Coef 9.78, 95% CI 1.00 | 18.56). Conclusions It is necessary to target public health policies to address vaccination inequalities. These efforts should include expanding vaccination campaigns, enhancing catch-up programs, and increase resource allocation in primary care settings to facilitate the role of General Practitioners and Paediatricians in fostering awareness and adherence.
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Affiliation(s)
| | | | - Gianluca Fevola
- Department of Public Health, University “Federico II” of Naples, Naples, Italy
| | - Michele Sorrentino
- Department of Public Health, University “Federico II” of Naples, Naples, Italy
| | - Gaetano Buonocore
- Clinical Directorate, University Hospital “Federico II” of Naples, Naples, Italy
| | - Maria Triassi
- Department of Public Health, University “Federico II” of Naples, Naples, Italy
- Interdepartmental Research Center in Healthcare Management and Innovation in Healthcare (CIRMIS), 80131 Naples, Italy
| | - Raffaele Palladino
- Department of Public Health, University “Federico II” of Naples, Naples, Italy
- Interdepartmental Research Center in Healthcare Management and Innovation in Healthcare (CIRMIS), 80131 Naples, Italy
- Department of Primary Care and Public Health, School of Public Health, Imperial College, London, UK
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Doshi RH, Garbern SC, Kulkarni S, Perera SM, Fleming MK, Muhayangabo RF, Ombeni AB, Tchoualeu DD, Kallay R, Song E, Powell J, Gainey M, Glenn B, Mutumwa RM, Hans Bateyi Mustafa S, Earle-Richardson G, Gao H, Abad N, Soke GN, Fitter DL, Hyde TB, Prybylski D, Levine AC, Jalloh MF, Mbong EN. Ebola vaccine uptake and attitudes among healthcare workers in North Kivu, Democratic Republic of the Congo, 2021. Front Public Health 2023; 11:1080700. [PMID: 37559741 PMCID: PMC10408297 DOI: 10.3389/fpubh.2023.1080700] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Accepted: 06/19/2023] [Indexed: 08/11/2023] Open
Abstract
Introduction During the 2018-2020 Ebola virus disease (EVD) outbreak in the eastern part of the Democratic Republic of the Congo (DRC), prevention and control measures, such as Ebola vaccination were challenging by community mistrust. We aimed to understand perceptions regarding Ebola vaccination and identify determinants of Ebola vaccine uptake among HCWs. Methods In March 2021, we conducted a cross-sectional survey among 438 HCWs from 100 randomly selected health facilities in three health zones (Butembo, Beni, Mabalako) affected by the 10th EVD outbreak in North Kivu, DRC. HCWs were eligible if they were ≥ 18 years and were working in a health facility during the outbreak. We used survey logistic regression to assess correlates of first-offer uptake (i.e., having received the vaccine the first time it was offered vs. after subsequent offers). Results Of the 438 HCWs enrolled in the study, 420 (95.8%) reported that they were eligible and offered an Ebola vaccine. Among those offered vaccination, self-reported uptake of the Ebola vaccine was 99.0% (95% confidence interval (CI) [98.5-99.4]), but first-offer uptake was 70.2% (95% CI [67.1, 73.5]). Nearly all HCWs (94.3%; 95% CI [92.7-95.5]) perceived themselves to be at risk of contracting EVD. The most common concern was that the vaccine would cause side effects (65.7%; 95% CI [61.4-69.7]). In the multivariable analysis, mistrust of the vaccine source or how the vaccine was produced decreased the odds of first-time uptake. Discussion Overall uptake of the Ebola vaccine was high among HCWs, but uptake at the first offer was substantially lower, which was associated with mistrust of the vaccine source. Future Ebola vaccination efforts should plan to make repeated vaccination offers to HCWs and address their underlying mistrust in the vaccines, which can, in turn, improve community uptake.
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Affiliation(s)
- Reena H. Doshi
- Global Immunization Division, Centers for Disease Control and Prevention, Atlanta, GA, United States
| | - Stephanie C. Garbern
- Department of Emergency Medicine, Brown University, Providence, RI, United States
| | - Shibani Kulkarni
- Global Immunization Division, Centers for Disease Control and Prevention, Atlanta, GA, United States
| | | | - Monica K. Fleming
- Global Immunization Division, Centers for Disease Control and Prevention, Atlanta, GA, United States
| | | | | | | | - Ruth Kallay
- Global Immunization Division, Centers for Disease Control and Prevention, Atlanta, GA, United States
| | | | | | | | - Bailey Glenn
- James A. Ferguson Infectious Disease Program, Baltimore, MD, United States
| | | | | | - Giulia Earle-Richardson
- National Center for Emerging and Zoonotic Diseases, Centers for Disease Control and Prevention, Atlanta, GA, United States
| | - Hongjiang Gao
- Global Immunization Division, Centers for Disease Control and Prevention, Atlanta, GA, United States
| | - Neetu Abad
- Global Immunization Division, Centers for Disease Control and Prevention, Atlanta, GA, United States
| | - Gnakub Norbert Soke
- Division of Global Health Protection, Centers for Disease Control and Prevention, Kinshasa, Democratic Republic of Congo
| | - David L. Fitter
- Global Immunization Division, Centers for Disease Control and Prevention, Atlanta, GA, United States
| | - Terri B. Hyde
- Global Immunization Division, Centers for Disease Control and Prevention, Atlanta, GA, United States
| | - Dimitri Prybylski
- Global Immunization Division, Centers for Disease Control and Prevention, Atlanta, GA, United States
| | - Adam C. Levine
- International Medical Corps, Washington, DC, United States
- International Medical Corps, Goma, Democratic Republic of Congo
| | - Mohamed F. Jalloh
- Division of Global HIV and TB, Centers for Disease Control and Prevention, Atlanta, GA, United States
| | - Eta Ngole Mbong
- International Medical Corps, Goma, Democratic Republic of Congo
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3
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Holroyd TA, Howa AC, Proveaux TM, Delamater PL, Klein NP, Buttenheim AM, Limaye RJ, Omer SB, Salmon DA. School-level perceptions and enforcement of the elimination of nonmedical exemptions to vaccination in California. Hum Vaccin Immunother 2021; 17:1986-1993. [PMID: 33493075 DOI: 10.1080/21645515.2020.1857202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
Abstract
In 2015, California passed Senate Bill 277 eliminating all nonmedical exemptions to school vaccinations. We aimed to explore school-level modes of SB277 enforcement, characterize vaccination knowledge, attitudes, and beliefs of school officials, and identify whether school vaccination policies are associated with medical exemptions being granted. Surveys were mailed to a stratified random sample of 1,450 schools in California. School personnel (n = 752) reported their medical training, vaccination beliefs, enforcement of vaccination policies, and school rates of medical exemptions. Multiple logistic regression was used to assess whether school policies are associated with the likelihood of medical exemption requests being granted. Nurses were more likely than non-nurses to hold beliefs recognizing the importance of vaccination. A school where the survey respondent was a nurse was more likely to have granted a medical exemption request compared to a school where the respondent was not a nurse (OR 2.11, 95% CI 1.34-3.36). The training of school officials and school-level practices may impact the enforcement of medical exemptions. Equipping school officials as competent sources of vaccine information for concerned parents will be valuable in improving parental vaccine uptake.
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Affiliation(s)
- Taylor A Holroyd
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA.,International Vaccine Access Center, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Amanda C Howa
- Hubert Department of Global Health, Rollins School of Public Health, Emory University, Atlanta, GA, USA
| | - Tina M Proveaux
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA.,Institute for Vaccine Safety, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Paul L Delamater
- Department of Geography and Carolina Population Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Nicola P Klein
- Kaiser Permanente Vaccine Study Center, Kaiser Permanente Northern California Division of Research, Oakland, CA, USA
| | - Alison M Buttenheim
- Department of Family and Community Health, University of Pennsylvania School of Nursing, Philadelphia, PA, USA
| | - Rupali J Limaye
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA.,International Vaccine Access Center, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA.,Institute for Vaccine Safety, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA.,Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA.,Department of Health, Behavior & Society, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Saad B Omer
- Yale Institute for Global Health, Yale University, New Haven, CT, USA.,Department of Internal Medicine, Yale School of Medicine, New Haven, CT, USA.,Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, CT, USA
| | - Daniel A Salmon
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA.,Institute for Vaccine Safety, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA.,Department of Health, Behavior & Society, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
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Shachakanza J, Zulu JM, Maimbolwa M. Uptake of Rotavirus Vaccine and Factors That Contributed to Its Adoption and Acceptability by Parents/Guardians in Selected Communities of Ndola, Copperbelt Province, Zambia. Health (London) 2019. [DOI: 10.4236/health.2019.114037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Apte A, Roy S, Bavdekar A, Juvekar S, Hirve S. Facilitators and barriers for use of rotavirus vaccine amongst various stakeholders and its implications for Indian context - A systematic review. Hum Vaccin Immunother 2018; 14:2760-2767. [PMID: 29913110 DOI: 10.1080/21645515.2018.1489190] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Background: We performed a systematic review to evaluate factors affecting uptake of rotavirus vaccine amongst physicians, parents and health system. Methods: We identified 15 studies that met the inclusion criteria from 790 screened studies published between Jan 2005 to Jan 2016. Results: Perceived severity of rotavirus disease, efficacy of vaccine and recommendation by health authorities positively influenced uptake of vaccine amongst health care providers. Routine and timely vaccination with routine vaccines and availability of rotavirus vaccine in public health programme facilitated uptake. Family income, parental education and employment status positively influenced the decision to vaccinate by parents. Concerns about safety, high cost, additional workload and logistic problems in acquiring vaccine stocks were perceived as barriers. Conclusion: Improved awareness regarding the rotavirus vaccination amongst public and scientific community and strengthening of public health system for better and timely immunisation coverage are important factors to maximize uptake of rotavirus vaccine in India.
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Affiliation(s)
- Aditi Apte
- a Department of Pediatric Research, KEM Hospital Research Centre , Pune , India
| | - Sudipto Roy
- b Vadu Rural Health Program, KEM Hospital Research Centre , Pune , India
| | - Ashish Bavdekar
- a Department of Pediatric Research, KEM Hospital Research Centre , Pune , India
| | - Sanjay Juvekar
- b Vadu Rural Health Program, KEM Hospital Research Centre , Pune , India
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Hagan JE, Gaonkar N, Doshi V, Patni A, Vyas S, Mazumdar V, Kosambiya JK, Gupta S, Watkins M. Knowledge, attitudes, and practices of private sector immunization service providers in Gujarat, India. Vaccine 2018; 36:36-42. [PMID: 29174674 PMCID: PMC11008497 DOI: 10.1016/j.vaccine.2017.11.046] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Revised: 11/13/2017] [Accepted: 11/15/2017] [Indexed: 11/19/2022]
Abstract
BACKGROUND India is responsible for 30% of the annual global cohort of unvaccinated children worldwide. Private practitioners provide an estimated 21% of vaccinations in urban centers of India, and are important partners in achieving high vaccination coverage. METHODS We used an in-person questionnaire and on-site observation to assess knowledge, attitudes, and practices of private immunization service providers regarding delivery of immunization services in the urban settings of Surat and Baroda, in Gujarat, India. We constructed a comprehensive sampling frame of all private physician providers of immunization services in Surat and Baroda cities, by consulting vaccine distributors, local branches of physician associations, and published lists of private medical practitioners. All providers were contacted and asked to participate in the study if they provided immunization services. Data were collected using an in-person structured questionnaire and directly observing practices; one provider in each practice setting was interviewed. RESULTS The response rate was 82% (121/147) in Surat, and 91% (137/151) in Baroda. Of 258 participants 195 (76%) were pediatricians, and 63 (24%) were general practitioners. Practices that were potential missed opportunities for vaccination (MOV) included not strictly following vaccination schedules if there were concerns about ability to pay (45% of practitioners), and not administering more than two injections in the same visit (60%). Only 22% of respondents used a vaccination register to record vaccine doses, and 31% reported vaccine doses administered to the government. Of 237 randomly selected vaccine vials, 18% had expired vaccine vial monitors. CONCLUSIONS Quality of immunization services in Gujarat can be strengthened by providing training and support to private immunization service providers to reduce MOVs and improve quality and safety; other more context specific strategies that should be evaluated may involve giving feedback to providers on quality of services delivered and working through professional societies to adopt standards of practice.
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Affiliation(s)
- José E Hagan
- Global Immunization Division, Centers for Disease Control and Prevention, Atlanta, USA; Epidemic Intelligence Service, Centers for Disease Control and Prevention, Atlanta, USA.
| | | | - Vikas Doshi
- Department of Preventive and Social Medicine, Medical College Baroda, Baroda, India.
| | - Anas Patni
- Department of Preventive and Social Medicine, Government Medical College, Surat, India.
| | - Shailee Vyas
- Department of Preventive and Social Medicine, Government Medical College, Surat, India.
| | - Vihang Mazumdar
- Department of Preventive and Social Medicine, Medical College Baroda, Baroda, India.
| | - J K Kosambiya
- Department of Preventive and Social Medicine, Government Medical College, Surat, India.
| | | | - Margaret Watkins
- Global Immunization Division, Centers for Disease Control and Prevention, Atlanta, USA.
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Jain P, Varanasi G, Ghuge R, Kalrao V, Dhongade R, Bavdekar A, Mehendale S, Chitambar S. Rotavirus infections in children vaccinated against rotavirus in Pune, Western India. Indian Pediatr 2016; 53:589-93. [DOI: 10.1007/s13312-016-0893-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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8
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Seale H, Sitaresmi MN, Atthobari J, Heywood AE, Kaur R, MacIntyre RC, Soenarto Y, Padmawati RS. Knowledge and attitudes towards rotavirus diarrhea and the vaccine amongst healthcare providers in Yogyakarta Indonesia. BMC Health Serv Res 2015; 15:528. [PMID: 26621140 PMCID: PMC4663724 DOI: 10.1186/s12913-015-1187-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2015] [Accepted: 11/18/2015] [Indexed: 11/22/2022] Open
Abstract
Background Rotavirus has been identified as the most common pathogen associated with severe diarrhoea. Two effective vaccines against the pathogen have been licensed. However, many countries including Indonesia have yet to introduce the vaccine into their national immunisation programs. This study aimed to examine the attitudes of healthcare providers (HCPs) and other health stakeholders towards the pathogen and the vaccine. Methods Semi-structured in-depth interviews were undertaken in two districts of Yogyakarta Province, Indonesia with nurses, midwives, primary care providers, pediatricians and other health stakeholders. Thematic analysis was undertaken. Results Fourteen interviews were conducted between August and October 2013. We identified that while participants do not consider diarrhea to be an important problem in Indonesia, they do acknowledge that it can be serious if not properly treated. While the majority had some level of knowledge about rotavirus, not all participants knew that a vaccine was available. There were mixed feelings towards the need for the vaccine. Some felt that the vaccine is not ranked as a priority as it is not listed on the national program. However, others agreed there is a rationale for its use in Indonesia. The cost of the vaccine (when sold in the private sector) was perceived to be the primary barrier impacting on its use. Conclusions The high cost and the low priority given to this vaccine by the public health authorities are the biggest obstacles impacting on the acceptance of this vaccine in Indonesia. HCPs need to be reminded of the burden of disease associated with rotavirus. In addition, reminding providers about the costs associated with treating severe cases versus the costs associated with prevention may assist with improving the acceptance of HCPs towards the vaccine. Promotion campaigns need to target the range of HCPs involved in the provision of care to infants and pregnant women.
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Affiliation(s)
- Holly Seale
- School of Public Health & Community Medicine, Faculty of Medicine, University of New South Wales, Level 2, Samuels Building, Sydney, 2052, Australia.
| | - Mei Neni Sitaresmi
- Faculty of Medicine, Universitas Gadjah Mada (UGM), Yogyakarta, Indonesia.
| | - Jarir Atthobari
- Faculty of Medicine, Universitas Gadjah Mada (UGM), Yogyakarta, Indonesia.
| | - Anita E Heywood
- School of Public Health & Community Medicine, Faculty of Medicine, University of New South Wales, Level 2, Samuels Building, Sydney, 2052, Australia.
| | - Rajneesh Kaur
- School of Public Health & Community Medicine, Faculty of Medicine, University of New South Wales, Level 2, Samuels Building, Sydney, 2052, Australia.
| | - Raina C MacIntyre
- School of Public Health & Community Medicine, Faculty of Medicine, University of New South Wales, Level 2, Samuels Building, Sydney, 2052, Australia.
| | - Yati Soenarto
- Faculty of Medicine, Universitas Gadjah Mada (UGM), Yogyakarta, Indonesia.
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Larson HJ, Jarrett C, Schulz WS, Chaudhuri M, Zhou Y, Dube E, Schuster M, MacDonald NE, Wilson R. Measuring vaccine hesitancy: The development of a survey tool. Vaccine 2015; 33:4165-75. [PMID: 25896384 DOI: 10.1016/j.vaccine.2015.04.037] [Citation(s) in RCA: 503] [Impact Index Per Article: 55.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
In March 2012, the SAGE Working Group on Vaccine Hesitancy was convened to define the term "vaccine hesitancy", as well as to map the determinants of vaccine hesitancy and develop tools to measure and address the nature and scale of hesitancy in settings where it is becoming more evident. The definition of vaccine hesitancy and a matrix of determinants guided the development of a survey tool to assess the nature and scale of hesitancy issues. Additionally, vaccine hesitancy questions were piloted in the annual WHO-UNICEF joint reporting form, completed by National Immunization Managers globally. The objective of characterizing the nature and scale of vaccine hesitancy issues is to better inform the development of appropriate strategies and policies to address the concerns expressed, and to sustain confidence in vaccination. The Working Group developed a matrix of the determinants of vaccine hesitancy informed by a systematic review of peer reviewed and grey literature, and by the expertise of the working group. The matrix mapped the key factors influencing the decision to accept, delay or reject some or all vaccines under three categories: contextual, individual and group, and vaccine-specific. These categories framed the menu of survey questions presented in this paper to help diagnose and address vaccine hesitancy.
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Affiliation(s)
- Heidi J Larson
- Department of Infectious Disease Epidemiology, London School of Hygiene & Tropical Medicine, London, United Kingdom and Department of Global Health, University of Washington, Seattle, USA.
| | - Caitlin Jarrett
- Department of Infectious Disease Epidemiology, London School of Hygiene & Tropical Medicine, London, United Kingdom and Department of Global Health, University of Washington, Seattle, USA
| | - William S Schulz
- Department of Infectious Disease Epidemiology, London School of Hygiene & Tropical Medicine, London, United Kingdom and Department of Global Health, University of Washington, Seattle, USA
| | | | | | - Eve Dube
- Institut National de Santé Publique du Québec, Canada
| | | | - Noni E MacDonald
- Department of Paediatrics, Dalhousie University, Canadian Centre for Vaccinology, IWK Health Centre, Halifax, Canada
| | - Rose Wilson
- Department of Infectious Disease Epidemiology, London School of Hygiene & Tropical Medicine, London, United Kingdom and Department of Global Health, University of Washington, Seattle, USA
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Kulkarni R, Arora R, Arora R, Chitambar SD. Sequence analysis of VP7 and VP4 genes of G1P[8] rotaviruses circulating among diarrhoeic children in Pune, India: a comparison with Rotarix and RotaTeq vaccine strains. Vaccine 2015; 32 Suppl 1:A75-83. [PMID: 25091685 DOI: 10.1016/j.vaccine.2014.03.080] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
BACKGROUND The G1P[8] rotaviruses are a common cause of rotavirus diarrhoea among children in India. Two rotavirus vaccines licensed in India, Rotarix and RotaTeq, contain strains with G1 and P[8] genotypes. A comparative analysis of these genotypes in the live rotavirus vaccines with circulating rotavirus strains is essential for assessment of rotavirus diversity. METHODS G1P[8] strains detected during rotavirus surveillance among diarrhoeic children hospitalized in Pune in 1992-1993 and 2006-2008, were included in the study. Amplification, sequencing and phylogenetic analysis of the VP7 and VP4 genes were carried out for identification of the G1 and P[8] lineages, respectively. Antigenic epitopes of VP7 and VP4 encoded proteins were compared to determine the differences between the G1P[8] strains from Pune and the vaccine strains. RESULTS G1-Lineage 1, P[8]-Lineage 3 strains were predominant in Pune during 1992-1993 and 2006-2008. Strains of G1-Lineage 2, P[8]-Lineage 3 and G1-Lineage 1, P[8]-Lineage 4 were detected at low levels during 2006-2008. The G1-Lineage 1, P[8]-Lineage 3 strains showed up to eight amino acid changes, each in the VP7 and VP4 epitopes, with respect to the Rotarix vaccine strain (G1-Lineage 2, P[8]-Lineage 1) and the G1 (Lineage-3) and P[8] (Lineage 2) components of the RotaTeq vaccine. The G1-Lineage 2 strains were closer to both vaccine strains with no or only two amino acid substitutions in the VP7 epitopes. The divergent P[8]-Lineage 4 (OP354-like) strains showed fourteen and fifteen amino acid differences, with Rotarix and RotaTeq vaccine strains, respectively, in the VP4 epitopes. CONCLUSION The differences between the G1P[8] strains in Pune and the G1 and P[8] components of the vaccine strains need to be described for appropriate evaluation of vaccine shedding. Continuous monitoring of the G1P[8] subgenotypic lineages would be necessary to study any long term impact of vaccine use on G1P[8] strain evolution.
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Affiliation(s)
- Ruta Kulkarni
- Enteric Viruses Group, National Institute of Virology, 20-A, Dr. Ambedkar Road, Pune-411001, India
| | - Ritu Arora
- Enteric Viruses Group, National Institute of Virology, 20-A, Dr. Ambedkar Road, Pune-411001, India
| | - Rashmi Arora
- Division of Epidemiology and Communicable Diseases, Indian Council of Medical Research, Ansari Nagar, New Delhi-110029, India
| | - Shobha D Chitambar
- Enteric Viruses Group, National Institute of Virology, 20-A, Dr. Ambedkar Road, Pune-411001, India.
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Ravi G, Venkatesh YP. Recognition of flavin mononucleotide, Haemophilus influenzae type b and its capsular polysaccharide vaccines by antibodies specific to D-ribitol-5-phosphate. Glycoconj J 2014; 31:573-85. [PMID: 25108762 DOI: 10.1007/s10719-014-9539-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2014] [Revised: 07/22/2014] [Accepted: 07/22/2014] [Indexed: 11/25/2022]
Abstract
D-Ribitol-5-phosphate (Rbt-5-P) is an important metabolite in the pentose phosphate pathway and an integral part of bacterial cell wall polysaccharides, specifically as polyribosyl ribitol phosphate (PRP) in Haemophilus influenzae type b (Hib). The major objective of this study was to investigate whether an antibody specific to Rbt-5-P can recognize the PRP of Hib. D-Ribose-5-phosphate was reacted with proteins in the presence of sodium cyanoborohydride to obtain Rbt-5-P epitopes; 120 h reaction resulted in conjugation of ~30 and ~17 moles of Rbt-5-P/mole of BSA and OVA, respectively, based on decrease in amino groups, MALDI-TOF analyses, an increase in apparent molecular weight (SDS-PAGE) and glycoprotein staining. Immunization of rabbits with Rbt-5-P-BSA conjugate generated antibodies to Rbt-5-P as demonstrated by dot immunoblot and non-competitive ELISA. Homogeneous Rbt-5-P-specific antibody was purified from Rbt-5-P-BSA antiserum subjected to caprylic acid precipitation followed by hapten-affinity chromatography; its affinity constant is 7.1 × 10(8) M(-1). Rbt-5-P antibody showed 100 % specificity to Rbt-5-P, ~230 %, 10 % and 3.4 % cross-reactivity to FMN, riboflavin and FAD, respectively; the antibody showed ~4 % cross-reactivity to D-ribitol and <3 % to other sugars/sugar alcohols. Rbt-5-P-specific antibody recognized Hib conjugate vaccines containing PRP which was inhibited specifically by Rbt-5-P, and also detected Hib cell-surface capsular polysaccharides by immunofluorescence. In conclusion, Rbt-5-P-protein conjugate used as an immunogen elicited antibodies binding to an epitope also present in PRP and Hib bacteria. Rbt-5-P-specific antibody has potential applications in the detection and quantification of free/bound Rbt-5-P and FMN as well as immunological recognition of Hib bacteria and its capsular polysaccharide.
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Affiliation(s)
- G Ravi
- Department of Biochemistry and Nutrition, CSIR-Central Food Technological Research Institute (CFTRI), 'Chaluvamba Vilas', KRS Road, Mysore, 570020, Karnataka State, India
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Tatte VS, Chothe NS, Chitambar SD. Characterisation of rotavirus strains identified in adolescents and adults with acute gastroenteritis highlights circulation of non-typeable strains: 2008–2012. Vaccine 2014; 32 Suppl 1:A68-74. [DOI: 10.1016/j.vaccine.2014.03.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Synthesizing evidences for policy translation: A public health discourse on rotavirus vaccine in India. Vaccine 2014; 32 Suppl 1:A162-70. [DOI: 10.1016/j.vaccine.2014.03.037] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Manthiram K, Blood EA, Kuppuswamy V, Martins Y, Narayan A, Burmeister K, Parvathy K, Hassan A. Predictors of optional immunization uptake in an urban south Indian population. Vaccine 2014; 32:3417-23. [PMID: 24736005 PMCID: PMC11057911 DOI: 10.1016/j.vaccine.2014.04.012] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2013] [Revised: 02/24/2014] [Accepted: 04/02/2014] [Indexed: 11/29/2022]
Abstract
BACKGROUND In Tamil Nadu, India, bacille Calmette-Guérin, diphtheria-tetanus-pertussis, oral poliomyelitis, hepatitis B, and measles vaccines are part of the routine immunization schedule and are available free from government health centers. All other vaccines are optional and available in the private sector at a cost to families. This study assesses immunization rates of routine and optional vaccines and examines parental attitudes toward vaccines in Pallavapuram, Tamil Nadu. METHODS The cluster sampling method was used to estimate immunization coverage. Seven children 18 to 36 months old were selected from 30 clusters for a total sample of 210 children. Demographics and vaccination data were collected from interviews and immunization records. Predictors of vaccination status were identified with logistic regression models. In addition, 21 parents participated in semi-structured interviews regarding their attitudes toward vaccination. Interviews were analyzed qualitatively for themes. RESULTS Eighty one percent of children were fully immunized with routine vaccines. However, only 21% received all "major" optional vaccines, defined as 3 doses of Haemophilus influenzae type b vaccine, one dose of measles, mumps, rubella vaccine, and one dose of varicella zoster virus vaccine. Birth in a private hospital (OR 5.6, 95% CI 1.3 to 22.9, P<0.01), higher income (P=0.03), and maternal completion of high school (OR 6.4, 95% CI 1.5 to 27.6, P<0.01) were significant predictors of receiving all major optional vaccines. Elucidated themes from interviews included (1) strong parental support for immunizations, (2) low concern for side effects, and (3) low uptake of optional vaccines due to high cost and lack of awareness. CONCLUSIONS Coverage of optional vaccines is low despite positive attitudes toward immunizations. Efforts to reduce cost and increase awareness of these vaccines particularly among low-income families or to include these vaccines in the routine schedule may increase uptake and reduce morbidity and mortality from vaccine-preventable diseases.
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Affiliation(s)
- Kalpana Manthiram
- Division of Pediatric Infectious Disease, Vanderbilt University Medical Center, Nashville, TN, United States.
| | - Emily A Blood
- Division of Adolescent Medicine, Boston Children's Hospital, Harvard Medical School, Boston, MA, United States; Clinical Research Center, Boston Children's Hospital, Harvard Medical School, Boston, MA, United States
| | | | - Yolanda Martins
- Center for Population Sciences, Dana-Farber Cancer Institute, Boston, MA, United States
| | - Athi Narayan
- Department of Neonatalogy, Emory Johns Creek Hospital, Johns Creek, GA, United States
| | - Kelly Burmeister
- Center for Population Sciences, Dana-Farber Cancer Institute, Boston, MA, United States
| | - K Parvathy
- Pallavaram Children's Medical Centre, Pallavaram, Tamil Nadu, India
| | - Areej Hassan
- Division of Adolescent Medicine, Boston Children's Hospital, Harvard Medical School, Boston, MA, United States
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Gargano LM, Thacker N, Choudhury P, Weiss PS, Russ RM, Pazol K, Arora M, Orenstein WA, Omer SB, Hughes JM. Pediatricians' perceptions of vaccine effectiveness and safety are significant predictors of vaccine administration in India. Int Health 2013; 5:205-10. [PMID: 24030271 DOI: 10.1093/inthealth/iht018] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND New vaccine introduction is important to decrease morbidity and mortality in India. The goal of this study was to identify perceptions that are associated with administration of four selected vaccines for prevention of Japanese encephalitis (JE), typhoid fever, influenza and human papillomavirus (HPV) infection. METHODS A random sample of 785 pediatricians from a national list of Indian Academy of Pediatrics members was selected for a survey to assess perceptions of vaccine effectiveness and safety, and vaccine administration practices. Logistic regression was used to assess factors associated with selective or routine use. RESULTS Pediatricians reported administering typhoid (91.6%), influenza (60.1%), HPV (46.0%) and JE (41.9%) vaccines selectively or routinely. Pediatricians who perceived the vaccine to be safe were significantly more likely to report administration of JE (OR 2.6, 95% CI 1.3 to 5.3), influenza (OR 4.3, 95% CI 2.0 to 9.6) and HPV vaccine (OR 6.2, 95% CI 3.1 to 12.7). Pediatricians who perceived the vaccine to be effective were significantly more likely to report administration of JE (OR 3.3, 95% CI 1.6 to 6.5), influenza (OR 7.7, 95% CI 2.5 to 23.1) and HPV vaccine (OR 3.2, 95% CI 1.6 to 6.4) CONCLUSION: Understanding the role perceptions play provides an opportunity to design strategies to build support for vaccine use.
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Affiliation(s)
- Lisa M Gargano
- Emory University, School of Medicine, 1462 Clifton Road NE, Room 446, Atlanta, GA 30322, USA
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Ozawa S, Stack ML. Public trust and vaccine acceptance--international perspectives. Hum Vaccin Immunother 2013; 9:1774-8. [PMID: 23733039 DOI: 10.4161/hv.24961] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Vaccines save millions of lives every year. They are one of the safest and most effective public health interventions in keeping populations healthy while bringing numerous social and economic benefits. Vaccines play an important role in ensuring that children, regardless of where they live, can have a healthy start to life. New financing mechanisms that allow poorer countries to gain access to vaccines faster than ever mean additional deaths and disabilities are projected to be saved during the Decade of Vaccines (2011-2020). Trust in vaccines and in the health system is an important element of public health programs that aim to deliver life-saving vaccines. Indeed, understanding the contributors and threats to trust is essential to explaining vaccine acceptance, particularly as they vary across epidemiologic conditions, specific vaccines and cultural and sociopolitical settings. Greater efforts to communicate the benefits and risks of vaccines and address issues with evidence-based information will help improve and sustain public trust in vaccines and health systems worldwide. Measuring and monitoring trust levels and focusing on deliberate efforts to build trust in vaccines are important steps to reducing vaccine confidence gaps when they occur.
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Affiliation(s)
- Sachiko Ozawa
- Johns Hopkins Bloomberg School of Public Health, International Health; Baltimore, MD USA
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