Parents' refusal to immunize their children with the measles, mumps, and rubella (MMR) vaccine has resulted in a surge of measles outbreaks in the United States. The purpose of this correlational study was to examine the relationships between parental knowledge and trust of the MMR vaccine, and their trust in government and medical authorities. The theoretical foundation for this study was the health belief model (HBM). This study determined if there was any relationship between general trust in doctors/governments (i.e., the predictor variable) and attitudes toward MMR vaccine (i.e., the sole dependent variable), and whether gender, age group, or level of education moderated that general trust. A Survey Monkey subscriber database and researcher-developed survey was used to identify and email 2,500 parents of immunization-aged children, resulting in 237 respondents who met the required parameters. The analysis revealed a significant, positive relationship between the criterion and predictor variables, R = .32, R2 = .10, F(1, 235) = 26.39, p. < .001, regardless of gender, age, or education, suggesting an association between higher trust and greater likelihood of a parent allowing vaccination. This study offers significant insights for positive social change by providing pediatricians, primary health care providers, and vaccine educators, with information for communicating with vaccine-hesitant parents: It is not enough to address parental concerns of vaccine safety, efficacy, and necessity. It is also not enough to provide evidence-based scientific data, as doing so has been proven to be ineffectiveâ??and for some parents counter-productiveâ??when government and medical authorities are sited as the source. What we need to do is start focusing upon the role of parental trust, including how to best establish that trust, and equally important, what steps are necessary to sustain that trust.

Vaccines are one of the most effective advances in medical science and continue to be developed for applications against infectious diseases, cancers, and autoimmunity. A common strategy for vaccine construction is the use of viral vectors derived from various virus families, with Adenoviruses (Ad) and Poxviruses (Pox) being extensively used. Studies utilizing viral vectors have shown a broad variety of vaccine-elicited immune response phenotypes. However, innate immune stimulation elicited by viral vectors and its possible role in shaping these vaccine-elicited adaptive immune responses remains unclear. Here we show that Ad and Pox vectors display profound intra- and inter-group differences in innate immune cytokine and chemokine elicitation. The CD46-utilizing vectors Ad35, Ad26, and Ad48 induced greater anti-viral and proinflammatory cytokines and chemokines relative to Ad5 in vaccinated rhesus monkeys and stimulated human PBMC. Ad fiber protein, as well as other capsid components, influenced resultant Ad vector innate stimulatory phenotypes. Analysis of human sera from Ad26-vaccinated volunteers showed similar anti-viral and proinflammatory cytokine and chemokine elicitation. Mechanistic analysis of Ad innate immune stimulation showed greater amounts Ad35 and Ad26, and small amounts of Ad5, traffic to the late endosome following infection. Innate immune stimulation by all three was reduced by inhibition of endosomal acidification, Cathepsin B, and Caspase-1, suggesting a common set of innate immune sensors triggered by Ads between 0-6 hours post-infection, in agreement with trafficking data showing Ad vector colocalization in the late endosome at similar time points. These data suggest a model mechanism explaining differences in observed Ad vector innate immune stimulation phenotypes. Similar to results obtained with Ad vectors, analysis of innate cytokine and chemokine responses elicited by Pox vectors ALVAC, MVA, and NYVAC showed that all three were distinct, with the canarypox-based vector ALVAC eliciting a unique potent proinflammatory response. Together these results reveal surprising and pronounced differences in innate immune stimulatory properties of viral vectors. Furthermore, these results could lead to possible strategies for targeted construction of vaccines for desired innate immune phenotypes, and have profound implications on vaccine design against infectious diseases and cancers, as well as gene therapy.

How does a drug with a limited safety and efficacy record become an international blockbuster? In June 2006 the FDA approved and recommended a new vaccine directed against 4 types of sexually transmitted human papillomavirus, associated with 70% of cervical cancer cases and 90% of genital wart cases. Branded as a "cervical cancer vaccine" Gardasil has been met with as much fanfare as controversy, and retains blockbuster status in Merck's portfolio. Sold as a cancer risk-reduction method, Gardasil carries its own risks, with startlingly low efficacy and elevated likelihood of serious adverse events (side effects). Through the lens of risk, this dissertation examines Gardasil's popularity in the face of evidence that it is neither as safe nor as effective as advertised. Through three distinct research projects, I identify (a) five sociological factors responsible for Gardasil's success on the heels of Vioxx, one of the biggest drug scandals in history; (b) how amongst healthy vaccinated girls, cervical cancer is experienced as a "risk object," yet when a young woman experiences a serious adverse event that "object of risk" and her "experience of risk" shift toward Gardasil; and (c) that Gardasil is so trusted among young women, that warnings about potential side effects from others made some girls more likely to get vaccinated and have a positive opinion on the vaccine, suggesting that Gardasil benefits from a broader cultural assumption that vaccines are inherently safe and effective. Physicians and pharmaceutical marketing also play an important role. Gardasil is a risk-reduction drug and vaccine purported to treat risk while it simultaneously creates new risk for further health problems in some consumers. This dissertation contributes to sociological literatures on pharmaceuticalization, pharmaceutical pseudoscience, the social construction of risk, research on regulatory agencies, and the sociology of medicine more broadly.

Chaperone proteins such as heat-shock proteins 70, 90 and 110, glucose-related protein 94 and calreticulin have been reported to be effective anti-tumor vaccines when purified from a tumor source. We have developed a procedure utilizing a free-solution-isoelectric focusing technique to obtain vaccines from tumor or normal tissue sources that are rich in multiple immunogenic chaperone proteins, called Chaperone-Rich Cell Lysate (CRCL). Tumor-associated peptides are presumed to be the currency of T-cell mediated anti-cancer immunity, and tumor-derived chaperone vaccines are believed to be purveyors of such peptides. As a novel anti-cancer strategy, we have examined the extent to which the peptide repertoire of CRCL can be manipulated. Here, we explored the concept of creating a designer CRCL, utilizing the adjuvant properties and the carrying capacity of CRCL to deliver exogenous antigenic peptides for DC-based presentation and ultimately demonstrate the anti-tumor efficacy of the designer vaccine in vivo. Designer CRCL allows for the development of personalized vaccines to those afflicted with cancer expressing known antigens.Growing evidence indicates that the stress response, specifically involving HSPs, has a profound impact on tumor immunogenicity. Enhancement of T-cell-mediated immunogenicity correlates with the expression of inducible heat shock protein 70 (iHSP70), the major heat-inducible member of the HSP70 family. In addition, studies have shown tumor-specific cell surface localization of iHSP70 correlates with an increased sensitivity to lysis mediated by human natural killer (NK) cells. Given these findings, investigating novel and effective means of modulating the heat shock response within tumor cells may bear great therapeutic potential and result in potent anti-tumor immune activity. Withaferin A (WA) is a compound isolated from the plant Withania somnifera that has been shown to induce a robust transcriptional heat shock response. In our studies, we found that WA treatment resulted in increased surface expression of iHSP70 in several tumor types leading to significant immunostimulatory effects. These findings indicated that WA-dependent modulation of the heat shock response may enhance tumor immunogenicity. Given the potent immunomodulatory and anti-tumor effects of WA as well as the adjuvanticity and specificity of peptide-complexed CRCL against tumors, these therapies individually have shown profound anti-cancer activity.

Introduction: Human papillomavirus (HPV) is the most common sexually transmitted infection and causes 529.000 cases of cervical cancer every year. Nowadays, there are vaccines available to prevent infection. Knowledge of HPV influence the attitude towards the vaccine and is therefore a factor of accepting the vaccine. Aim: The aim of this study was to examine the knowledge of HPV and attitudes towards HPV-vaccine among Thai female university students. Method:  Descriptive and cross-sectional study with quantitative method using a questionnaire. Purposive sampling was used. The sample consisted of students from two different universities in Bangkok, Thailand and out of the 201 students whom filled in the questionnaire, 192 questionnaires were used. Result: There were 64.6% of the participants that had heard of HPV previously. Of these, the most common source of information was health professionals. The HPV-vaccine was known by 42.6% of the participants and 17.4% had taken the vaccination. Over 90% of the participants had a poor or moderate knowledge of HPV. In total, most of the participants in the sample were found to have a positive level of attitude towards the vaccine (72.4%). Almost all participants wanted to know more about HPV and the HPV-vaccine and 88.5% thought it was necessary for them to get the vaccination. Conclusion: As some gaps in knowledge among the participants were shown, the information to young women should be improved and aim to increase the motivation towards the use of preventive methods, such as taking the HPV-vaccine.

Die Mastitis beim Milchrind hat eine große ökonomische Bedeutung, daher liegt derzeit ein Forschungsschwerpunkt auf der Aktivierung und Stabilisierung der körpereigenen Abwehr zur Bekämpfung von Euterentzündungen. Besonders im peripartalen Zeitraum liegt eine Prädisposition für Infektionen vor, da eine physiologische Abwehrschwäche besteht. Daher erscheint die Förderung der Bildung von Antikörpern durch Impfungen sinnvoll. Getestet wurde der Einfluss von bestandsspezifischen E. coli-Vakzinen auf das Immunsystem, das Erregervorkommen in der Milch und die Eutergesundheit. Differenziert wurden Impfstoffe, die einerseits aus den Originalkulturen der antigenen Erreger (sogenannte large colony variants, LCV) oder aber aus den kleineren, intrazellulär persistierenden Erregern (small colony variants, SCV) hergestellt wurden. Letztlich zeigte sich bei Anwendung der Vakzinen an Milchrindern kein Unterschied zwischen LCV und SCV, bei beiden Impfstoffen war eine vakzinationsbedingte deutliche Steigerung der Antikörpertiter, welche einen Einfluss auf Erregervorkommen und Eutergesundheit hatte, erkennbar.

BACKGROUND: The under-5 mortality rate in Ethiopia is 118/1000. A child in Ethiopia is 30 times more likely to die before age 5 than a child in Western Europe. Children are the most vulnerable segment of the population, but many of the ailments that cause death in this population can be avoided by completion of routine childhood vaccination. METHODS: Data regarding child health from the Demographic and Health Survey (DHS), a periodic cross-sectional survey administered at the household level was utilized in this study. Data from 8,905 mothers of living children between 0-5 years of age was included in the study. Univariate and multivariate analyses of selected socio-demographic variables were conducted to examine association with vaccination status. RESULTS: Risk factors for vaccination defaulting were identified. Logistic modeling with the selected factors was conducted with vaccination status and the demographic characteristics of families as independent factors. Type of Residence, Region and Wealth Index were the only significant characteristic in predicting the likelihood of a child being vaccinated when controlled for other factors. CONCLUSION: The results of this study illustrate that geographic disparities result in lower vaccination completion for lower income families from rural settings than other groups. Families’ behavior around child vaccination is a microcosm of various social determinants affecting their decision-making. Resources further removed from health such as better roads and education can improve vaccination uptake.

HPV vaccine school entry mandates and vaccine funding by state was examined using the Diffusion of Innovations (DOI) theory. The DOI was applied to HPV immunization policy to evaluate the rate of vaccine adoption and to determine whether associations existed between an empirical need for vaccine adoption and action by the states. State-level data on political characteristics, health and policy were collected from several secondary sources. Data analyses were performed utilizing SPSS logistic regression models. Odds rations were used to evaluate the associations between the independent and dependent variables to determine whether there was a statistical significance level of .05. Cervical Cancer incidence in a state was significantly associated with HPV school entry mandates (proposed or enacted), but it did not show a significant association with HPV vaccine funding. Diffusion of vaccine innovation is slow, which may offer additional opportunities to evaluate effective policy strategies for coverage and use of the HPV vaccine.

Necrotic enteritis (NE) is an economically important enteric disease of broiler chicken primarily caused by a-toxin (Cpa) secreted by C. perfringens type A. Mice immunized with recombinant C-terminal domain of Cpa (CpaCD) had transient and fewer localized lesions upon challenge with C. perfringens type A. These results demonstrate the usefulness of CpaCD as an immunogen for vaccine development against NE for chickens. Chicken CD40 (chCD40) is mainly expressed on the surface of chicken antigen-presenting cells (APCs), and the interaction of chCD40 and chCD40L (natural ligand for chCD40) provides crucial activation signals for chicken B-cells. A hypothesis was proposed that in ovo vaccination with an adenovirus-vectored CpaCD vaccine capable of targeting immunogen to APCs through the CD40 pathway will improve protection against NE in chickens. One agonistic monoclonal anti-chCD40 antibody (designated 2C5) was produced and characterized. 2C5 not only detected expression of chCD40 on chicken APCs, but also induced NO synthesis in chicken HD11 macrophages and enhanced proliferation of serum-starved chicken DT40 B-cells. This demonstrated substantial functional equivalence of 2C5 with chCD40L. The potential of 2C5 as an immunological adjuvant was further assessed by targeting a hapten to chicken APCs in hopes of enhancing an effective IgG response. Seven-week old chickens were immunized subcutaneously once with a complex consisting of 2C5 and peptide, and relative quantification of the peptide-specific IgG response showed that this complex was able to elicit a strong IgG response as early as four days post-immunization. This demonstrates that CD40-targeting antigen to chicken APCs can significantly enhance antibody responses and induce immunoglobulin isotype-switching. An agonistic anti-chCD40 single-chain variable fragment (designated DAG1) was combined with an adenoviral delivery system to create a vaccine, Ad-(DAG1-Cp aCD-FLAG), for in ovo administration. The efficacy of in ovo vaccination of broilers with Ad-(DAG1-Cp aCD-FLAG) in controlling NE was evaluated by C. perfringens type A challenge at 18 days post-hatch. Neither statistically significant IgA / IgG response nor protection against C. perfringens type A challenge was found in the vaccinated birds. These preliminary data suggest that a super-optimal dose of Ad-(DAG1-Cp aCD-FLAG) may be the main issue, because Cpa-specific B-cells may undergo apoptosis through the CD40 pathway.

In Canada, parental acceptance and uptake of the HPV vaccine has been low. There is a need for more effective HPV vaccination health messages for parents. Whether a message is framed in terms of the benefits of engaging in the behaviour (gain frame), the costs of failing to engage in the behaviour (loss frame) or both the benefits and the costs (mixed frame) has potential to impact parents’ decision making. The appropriate frame of a message may depend on the recipient’s sex and involvement with the health issue. The purpose of this study was to investigate the persuasiveness of gain-, loss- and mixed-framed messages on mothers’ and fathers’ intentions to have their young son or daughter vaccinated against HPV. The study used a 3 Frame x 2 Sex of Parent x 2 Sex of Child design. We randomly assigned participants (n=367) to read a framed message and then complete a 29-item questionnaire assessing theoretical determinants of parental consent for vaccination. ANCOVAs revealed a three-way interaction for intentions to speak to a doctor about the HPV vaccine, F(2, 342)=3.66, p =.03, perceived severity of HPV, F(2, 347) = 3.10, p = .05, and for anxiety about their child contracting HPV, F(2, 342)=3.58, p=.02. Effect size comparisons revealed that gain-framed messages seem to persuade parents who are the opposite sex to the child for whom they are considering the vaccine. In turn, loss- and mixed-framed messages may persuade parents who are the same sex as the child for whom they are considering the vaccine. Perceived severity of HPV and anxiety about HPV mediated the relationship between message frame and intentions for some parent-child dyads. Findings have implications for constructing effective messages encouraging parents to consider having their child vaccinated against HPV. / Thesis (Master, Kinesiology & Health Studies) -- Queen's University, 2010-07-07 23:06:25.757