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https://www.readbyqxmd.com/read/28903749/modelling-the-effects-of-booster-dose-vaccination-schedules-and-recommendations-for-public-health-immunization-programs-the-case-of-haemophilus-influenzae-serotype-b
#1
Nadia A Charania, Seyed M Moghadas
BACKGROUND: Haemophilus influenzae serotype b (Hib) has yet to be eliminated despite the implementation of routine infant immunization programs. There is no consensus regarding the number of primary vaccine doses and an optimal schedule for the booster dose. We sought to evaluate the effect of a booster dose after receiving the primary series on the long-term disease incidence. METHODS: A stochastic model of Hib transmission dynamics was constructed to compare the long-term impact of a booster vaccination and different booster schedules after receiving the primary series on the incidence of carriage and symptomatic disease...
September 13, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28882440/determinants-of-under-immunization-and-cumulative-time-spent-under-immunized-in-a-quebec-cohort
#2
Shauna O'Donnell, Eve Dubé, Bruce Tapiero, Arnaud Gagneur, Margaret K Doll, Caroline Quach
BACKGROUND: Under-immunization refers to a state of sub-optimal protection against vaccine preventable diseases. Vaccine coverage for age may not capture intentional or non-intentional spacing of vaccines in the recommended provincial immunization guidelines. We aimed to identify factors associated with coverage and under-immunization and to determine the number of days during which children were under-immunized during their first 24months of life. METHODS: Secondary analysis of children ≤3years recruited through active surveillance for gastroenteritis from three Quebec pediatric emergency departments from 2012 to 2014...
September 4, 2017: Vaccine
https://www.readbyqxmd.com/read/28871608/paediatric-invasive-haemophilus-influenzae-in-queensland-australia-2002-2011-young-indigenous-children-remain-at-highest-risk
#3
Gavin Cleland, Clare Leung, Jenny Wan Sai Cheong, Joshua Francis, Claire Heney, Clare Nourse
AIM: Haemophilus influenzae continues to cause invasive disease in children despite widespread Hib immunisation. The significance of non-B serotypes continues to be investigated, with evidence of increased invasive non-typeable H. influenzae (NTHi) world-wide. The aim of this study was to examine the current epidemiological and clinical features of invasive H. influenzae disease in children in Queensland, Australia. METHODS: A retrospective review was performed of all cases of invasive H...
September 4, 2017: Journal of Paediatrics and Child Health
https://www.readbyqxmd.com/read/28870657/use-of-biologic-therapy-by-pregnant-women-with-inflammatory-bowel-disease-does-not-affect-infant-response-to-vaccines
#4
Dawn B Beaulieu, Ashwin N Ananthakrishnan, Christopher Martin, Russell D Cohen, Sunanda V Kane, Uma Mahadevan
BACKGROUND & AIMS: In women with inflammatory bowel diseases (IBD), exposure to immunomodulator or biologic therapy has not been associated with adverse events during pregnancy or outcomes of newborns. We investigated whether exposure of patients to these agents during pregnancy affects serologic responses to vaccines in newborns. METHODS: We collected data from the Pregnancy in IBD and Neonatal Outcomes registry, which records outcomes of pregnant women with diagnosis of IBD receiving care at multiple centers in the United States, from 2007 - 2016...
September 1, 2017: Clinical Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28858039/fulminant-haemophilus-influenzae-type-a-infection-in-a-4-year-old-with-previously-undiagnosed-asplenic-heterotaxy
#5
Andrew Headrick, Erinn O Schmit, David W Kimberlin
The post Hib-vaccine era has resulted in increased cases of invasive, non-Hib, Haemophilus influenzae infections. One of the encapsulated species, type a, displays the most similarity in virulence to type b. Our patient, a fully-vaccinated four-year-old female, with newly diagnosed asplenia in the setting of heterotaxy, had a prolonged hospital course with disseminated Haemophilus influenzae type a infection.
August 26, 2017: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/28855159/non-specific-effects-of-measles-mumps-and-rubella-mmr-vaccination-in-high-income-setting-population-based-cohort-study-in-the-netherlands
#6
Susanne M A J Tielemans, Hester E de Melker, Susan J M Hahné, Anna G C Boef, Fiona R M van der Klis, Elisabeth A M Sanders, Marianne A B van der Sande, Mirjam J Knol
Objectives To investigate whether measles, mumps, and rubella (MMR) vaccine has positive non-specific effects in a high income setting and to compare rates of hospital admissions for infections between children aged ≤2 years who received live MMR vaccine and those who received an inactivated vaccine against diphtheria, tetanus, pertussis, polio, and Haemophilus influenzae type b (DTaP-IPV-Hib) as their most recent vaccination.Design Nationwide population based cohort study.Setting In the Netherlands, DTaP-IPV-Hib+pneumococcal vaccination (PCV) is recommended at ages 2, 3, 4, and 11 months and MMR + meningococcal C (MenC) vaccination at age 14 months...
August 30, 2017: BMJ: British Medical Journal
https://www.readbyqxmd.com/read/28840658/experimental-design-and-metabolic-flux-analysis-tools-to-optimize-industrially-relevant-haemophilus-influenzae-type-b-growth-medium
#7
Mateus Ribeiro da Silva, Carla Andreia Freixo Portela, Silvia Maria Ferreira Albani, Paola Rizzo de Paiva, Martha Massako Tanizaki, Teresa Cristina Zangirolami
Haemophilus influenzae type b (Hib), a Gram-negative capsulated bacterium, is a causative agent of meningitis worldwide. The capsular polysaccharide, a high molecular mass polymer consisting of the repeated units of the polyribosyl-ribitol-phosphate, is considered the main virulence factor and it is used as an antigen to vaccines, conjugated to a carrier protein. The industrial production of the polysaccharide requires the cultivation of Hib in rich medium, which impacts process costs and product recovery. In this study, a central composite rotational experimental design strategy was used to access the influence of key components of culture medium (soy peptone, yeast extract and glucose) on biomass formation and polysaccharide production in shake-flasks...
August 25, 2017: Biotechnology Progress
https://www.readbyqxmd.com/read/28835207/adverse-events-following-immunization-with-pentavalent-vaccine-experiences-of-newly-introduced-vaccine-in-iran
#8
Manoochehr Karami, Pegah Ameri, Jalal Bathaei, Zeinab Berangi, Tahereh Pashaei, Ali Zahiri, Seyed Mohsen Zahraei, Hussein Erfani, Koen Ponnet
BACKGROUND: The most important factors that affect the incidence of vaccine-related complications are the constituent biological components of the vaccine, injection site reactions, age and sex. The aim of this study is to determine the incidence rate of adverse events following immunization with pentavalent vaccine (DTPw-Hep B-Hib (PRP-T) vaccine (pentavac) (adsorbed) is manufactured by Serum Institute of India ltd), which was introduced in Iran in November 2014. It is important to monitor vaccine-related adverse events because of the role of vaccine safety in immunization program success...
August 23, 2017: BMC Immunology
https://www.readbyqxmd.com/read/28737468/economic-evaluations-of-haemophilus-influenzae-type-b-hib-vaccine-a-systematic-review
#9
Bunchai Chongmelaxme, Maythika Hammanee, Wariya Phooaphirak, Surachai Kotirum, Raymond Hutubessy, Nathorn Chaiyakunapruk
AIMS: The World Health Organization (WHO) recommends the use of Haemophilus influenzae type b (Hib) conjugate vaccines, but China and Thailand have not used Hib vaccination in their national immunization programs. This systematic review aimed to update published economic evaluations of Hib vaccinations and to determine factors that potentially affected their cost-effectiveness. METHODS: Searches were performed from the inception until December 2015 using 13 databases: CAB direct; CEA registry; EconLit; EMBASE; E-library; NHSEED; PAHO; POPLINE; PubMed; Redalyc project; RePEc; SciELO; and WHOLIS...
August 4, 2017: Journal of Medical Economics
https://www.readbyqxmd.com/read/28729019/safety-reactogenicity-and-immunogenicity-of-two-investigational-pneumococcal-protein-based-vaccines-results-from-a-randomized-phase-ii-study-in-infants
#10
Roman Prymula, Leszek Szenborn, Sven-Arne Silfverdal, Jacek Wysocki, Piotr Albrecht, Magali Traskine, Asparuh Gardev, Yue Song, Dorota Borys
INTRODUCTION: Vaccination with formulations containing pneumococcal protein antigens such as pneumolysin toxoid (dPly) and histidine-triad protein D (PhtD) may extend serotype-related protection of pneumococcal conjugate vaccines (PCVs) against Streptococcus pneumoniae. METHODS: This phase II, multi-center, observer-blind trial conducted in Europe (NCT01204658) assessed 2 investigational vaccines containing 10 serotype-specific polysaccharide conjugates of PHiD-CV and either 10 or 30µg of dPly and PhtD each...
July 17, 2017: Vaccine
https://www.readbyqxmd.com/read/28702311/the-evidence-for-non-typeable-haemophilus-influenzae-as-a-causative-agent-of-childhood-pneumonia
#11
EDITORIAL
Mary P E Slack
Haemophilus influenzae type b (Hib) was a major cause of bacterial pneumonia in children prior to the introduction of Hib-conjugate vaccines. The widespread use of Hib-conjugate vaccines has resulted in a significant decline in the number of cases of invasive Hib disease, including bacteraemic pneumonia, in areas where the vaccine has been implemented. In many countries, non-typeable H. influenzae (NTHI) is now the most common cause of invasive haemophilus infection in all ages. NTHI are a recognized cause of bacteraemic and non-bacteraemic pneumonia in children and in adults...
2017: Pneumonia
https://www.readbyqxmd.com/read/28702307/childhood-pneumonia-and-meningitis-in-the-eastern-highlands-province-papua-new-guinea-in-the-era-of-conjugate-vaccines-study-methods-and-challenges
#12
Christopher C Blyth, Rebecca Ford, Joycelyn Sapura, Tonny Kumani, Geraldine Masiria, John Kave, Lapule Yuasi, Andrew Greenhill, Ilomo Hwaihwanje, Amanda Lang, Deborah Lehmann, William Pomat
BACKGROUND: Pneumonia and meningitis are common causes of severe childhood illness in Papua New Guinea (PNG). The etiology of both clinical conditions in PNG has not been recently assessed. Changes in lifestyle, provision and access to healthcare, antimicrobial utilization and resistance, and the national childhood vaccination schedule necessitate reassessment. METHODS: A prospective case-control study was undertaken, enrolling children <5 years of age to determine the contemporary etiology of clinically defined moderate or severe pneumonia or suspected meningitis...
2017: Pneumonia
https://www.readbyqxmd.com/read/28700282/a-randomized-open-label-clinical-trial-to-evaluate-immunogenicity-and-safety-of-an-indigenously-developed-dtwp-hib-tetravalent-combination-vaccine-easyfour%C3%A2-tt-with-quadrovax%C3%A2-in-indian-infants
#13
Lalitendu Mohanty, Sunil Sharma, Beauty Behera, Sachin Panwar, Charu Paliwal, Anit Singh, Anu Gupta, Deepak Chandra Chilkoti
An open-label, randomized, multi-center trial was conducted to compare the immunogenicity and safety of an indigenously developed tetravalent DTwP-Hib vaccine, Easyfour®-TT with a commercially available vaccine, Quadrovax®. A total of 244 infants in good health, aged 6-10 weeks, were randomized in a 1:1 allocation to receive three doses of the test or comparator vaccine. Immunogenicity of the vaccines was determined by measuring the baseline and post-vaccination antibody response against the vaccine antigens; safety was evaluated in terms of local and systemic reactions (solicited and unsolicited) reported during the trial...
July 12, 2017: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/28696824/age-appropriate-versus-up-to-date-coverage-of-routine-childhood-vaccinations-among-young-children-in-israel
#14
Chen Stein-Zamir, Avi Israeli
BACKGROUND AND AIMS: Routine childhood vaccinations schedules recommend that children receive the vaccine doses at specific ages. Vaccination coverage data are conventionally reported by the up-to-date method. We aimed to assess vaccination timeliness by the age-appropriate method and compare with the up-to-date vaccination coverage. METHODS: Assessment of age-appropriate and up-to-date vaccination coverage among children born in Israel in 2009 and followed to age 48 months (national representative sample, n = 3892)...
July 11, 2017: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/28676382/new-perspectives-for-hexavalent-vaccines
#15
Pablo Obando-Pacheco, Irene Rivero-Calle, José Gómez-Rial, Carmen Rodríguez-Tenreiro Sánchez, Federico Martinón-Torres
With the increase in the number of routine vaccinations the development of pentavalent and hexavalent combination vaccines fitting the routine vaccination schedules became a necessity. In this respect, Europe has taken the lead in comparison with other world regions, and routine vaccination with pentavalent and hexavalent combinations including DTPa, Hib, HepB and IPV has been on European vaccination programs for >15years. Since the marketing authorization of Hexavac® and Infanrix Hexa® in 2000, immunization schedules in most European countries have included hexavalent vaccines...
July 1, 2017: Vaccine
https://www.readbyqxmd.com/read/28666758/the-changing-epidemiology-of-invasive-haemophilus-influenzae-disease-emergence-and-global-presence-of-serotype-a-strains-that-may-require-a-new-vaccine-for-control
#16
Raymond S W Tsang, Marina Ulanova
BACKGROUND: More than two decades after the implementation of the Hib conjugate vaccine in North America, Haemophilus influenzae serotype a (Hia) has emerged as a significant cause of invasive disease in Indigenous communities. However, little is known about the global presence of this pathogen. METHODS: We interrogated the H. influenzae Multi-Locus Sequence Typing (MLST) website (https://pubmlst.org/hinfluenzae/) by selecting for serotype a records. We also updated our previous literature review on this subject matter...
June 27, 2017: Vaccine
https://www.readbyqxmd.com/read/28628438/haemophilus-influenzae-type-a-meningitis-in-immunocompetent-child-oman-2015
#17
Kiran P Sawardekar
Meningitis caused by Haemophilus influenzae type b (Hib) was eliminated in Oman after the introduction of Hib vaccine in 2001. However, a case of H. influenzae type a meningitis was diagnosed in a child from Oman in 2015, which highlights the need to monitor the incidence of invasive non-Hib H. influenzae disease.
July 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28624983/how-to-increase-vaccination-acceptance-among-apostolic-communities-quantitative-results-from-an-assessment-in-three-provinces-in-zimbabwe
#18
Regina Gerede, Zorodzai Machekanyanga, Serigne Ndiaye, Kenneth Chindedza, Colline Chigodo, Messeret E Shibeshi, James Goodson, Fussum Daniel, Reinhard Kaiser
A worldwide increasing trend toward vaccine hesitancy has been reported. Measles outbreaks in southern Africa in 2009-2010 were linked to objections originating from Apostolic gatherings. Founded in Zimbabwe in the 1950s, the Apostolic church has built up a large number of followers with an estimated 3.5 million in Zimbabwe in 2014. To inform planning of interventions for the 2015 measles-rubella vaccination campaign, we assessed vaccination status and knowledge, attitudes and practices among purposive samples of Apostolic caregivers in three districts each in Harare City, Manicaland and Matabeleland South in Zimbabwe...
June 17, 2017: Journal of Religion and Health
https://www.readbyqxmd.com/read/28583305/immunogenicity-and-safety-of-a-new-hexavalent-vaccine-dtap5-ipv-hb-hib-administered-in-a-mixed-primary-series-schedule-with-a-pentavalent-vaccine-dtap5-ipv-hib
#19
Federico Martinón-Torres, Florence Boisnard, Stéphane Thomas, Christine Sadorge, Ray Borrow
DTaP5-IPV-HB-Hib vaccine is a fully-liquid, combination hexavalent vaccine. This phase III, open-label, multicentre study conducted in Spain, evaluated the immune response to all DTaP5-IPV-HB-Hib antigens when the vaccine was used in a mixed hexa/penta/hexa primary series. Infants (who had received one dose of hepatitis B vaccine at birth) received a mixed schedule including DTaP5-IPV-HB-Hib (PRP-OMP conjugate) at 2 and 6months of age, DTaP5-IPV-Hib at 4months, meningococcal serogroup C conjugate (MCC) vaccine at 2 and 4months, and routine rotavirus and pneumococcal vaccination...
June 2, 2017: Vaccine
https://www.readbyqxmd.com/read/28536030/lot-to-lot-consistency-safety-and-immunogenicity-of-3-lots-of-haemophilus-influenzae-type-b-conjugate-vaccine-results-from-a-phase-iii-randomized-multicenter-study-in-infants
#20
Nicola P Klein, Remon Abu-Elyazeed, Matthew Cornish, Michael L Leonardi, Leonard B Weiner, Peter E Silas, Stanley E Grogg, Meera Varman, Robert W Frenck, Brigitte Cheuvart, Yaela Baine, Jacqueline M Miller, Maarten Leyssen, Narcisa Mesaros, Sumita Roy-Ghanta
BACKGROUND: Vaccination against Haemophilus influenzae type b (Hib) is included in routine pediatric immunization schedule in the United States. Previous vaccine shortages have created the need for additional options for Hib vaccination. METHODS: This phase III, randomized, multi-centered study (NCT01000974) evaluated the safety and immunogenicity of a monovalent tetanus toxoid-conjugate Hib vaccine (Hib-TT) compared to a monovalent (Hib-TT control) and a combination Hib-TT vaccine...
May 20, 2017: Vaccine
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