Red Media vs. Blue Media: Social Distancing and Partisan News Media Use during the COVID-19 Pandemic

Political polarization surrounding the COVID-19 health crisis has been on the rise since the beginning of the pandemic. We combine prior research on motivated reasoning, selective exposure, and news framing to understand the association between partisan media use and social distancing behavior related to COVID-19. To do so, we collected media content data and national survey data during the onset of the pandemic. We employed structural topic modeling (STM), dependency parsing, word co-occurrence, and manual coding to examine the media coverage. Next, we analyzed survey data collected with a Qualtrics panel from a sample of U.S. residents for factors explaining social distancing behaviors. Results reveal coverage from the right leaning outlets downplayed the virus and highlighted the consequences of lockdowns on the economy. Our survey findings show that even after accounting for a range of demographic, political orientation, and COVID-19 awareness variables, conservative media use was linked, although modestly, with a lower likelihood of social distancing behavior. Our findings echo past research on media framing of pandemics and their association with public attitudes and behavior.

Misinformation, Risk Perceptions, and Intention to Seek Information About Masks: The Moderating Roles of Gender and Reflective Judgment

The current study has three main purposes: to examine 1) the impact of theory-driven corrective messages using individual vs. collective frames on information-seeking intention 2) the mediating role of risk perceptions and 3) the moderating role of reflection and gender. Our findings from a randomized experimental study and Hayes' moderated, moderated mediation model show collective frames were associated with high-risk perceptions among women, which in turn led to higher information seeking intention. The second moderator reveals that people who scored higher on reflection were more willing to seek information. Our findings have critical implications for misinformation research by demonstrating the importance of theoretically driven messages in understanding misperceptions as well as people's information seeking behavior.

Social Cognitive Theory and Willingness to Perform Recommended Health Behavior: The Moderating Role of Misperceptions

More than 6 million people have died due to the COVID-19 pandemic. In order to slow down the spread of COVID-19, health authorities have created numerous guidelines. In the current study, we use survey data from the U.S. and social cognitive theory (SCT) to examine the associations among self-efficacy, outcome expectancies, and willingness to perform recommended COVID-19 related health behavior. Considering the misinformation-filled information ecology during the pandemic, we also examine the moderating role of misperceptions in these relationships. Our findings show that in general the SCT hypotheses hold for COVID-19 related behavior willingness. The interaction effects with COVID-19 misperceptions show that self-efficacy is not enough to understand people's health behavior. Higher outcome expectancies are important and may be able to overcome even if people held high misperceptions. Our findings have direct implications for communication theory and for health organizations in the contemporary information ecology.

COVID-19 Vaccine Intention and Social Cognitive Theory: The Role of Individual Responsibility and Partisan Media Use in a Moderated Moderated Mediation Model

Despite the sheer devastation caused by the COVID-19 pandemic in the United States, vaccine hesitancy is a major barrier to a successful implementation of the vaccine. We apply two moderators to examine the associations of efficacy and expectancies with COVID-19 vaccine intention. Specifically, we use national survey data collected online in 2020 (N = 1264) and a moderated moderated mediation PROCESS model to examine 1) the associations between self-efficacy about COVID-19 and vaccine intention mediated by positive outcome expectancies and 2) moderating roles of individual responsibility and partisan media use. The findings show that the path from efficacy to expectancies is moderated by individual responsibility, while the path from expectancies to vaccine intention is moderated by liberal media use. Our findings support the strategic application of SCT to emphasize the role of personal responsibility in campaigns to encourage vaccination for the COVID-19 virus.

A Story is Better Told With Collective Interests: An Experimental Examination of Misinformation Correction During the COVID-19 Pandemic

PURPOSE

To examine strategies that help motivate social correction behaviors to combat COVID-19-related health misinformation on social media.

DESIGN

2 (message types: narrative vs statistics) x 2 (social frames: individual vs collective) between-subjects experiment.

SETTING

Qualtrics-based online experiment via Lucid.

SUBJECTS

The final sample consisted of 450 participants (Mage = 45.31).

MEASURES

Manipulation check, discussion and correction intentions, and need for cognition (NFC).

ANALYSIS

ANCOVA and PROCESS model 3 were used to analyze the data.

RESULTS

Significant interaction effects emerged between message types and social frames on discussion intention, F (1, 442) = 5.26, P = .022, and correction intention, F (1, 442) = 4.85, P = .028. Collectively framed narrative correction (Mdiscussion = 3.15, Mcorrection = 3.17) was more effective than individually framed narrative correction (Mdiscussion = 2.73, Mcorrection = 2.77). Individually framed statistical correction (Mdiscussion = 3.10, Mcorrection = 2.95) was more persuasive than collectively framed statistical correction (Mdiscussion = 2.89, Mcorrection = 2.69). The interaction effects were more evident for people low on NFC, P = .031.

CONCLUSION

In motivating social correction behaviors, a story is better told with an emphasis on collective interests, and numbers are better presented with personal gains and losses. Future interventions should identify the target audience based on the level of NFC.

Effect of membrane stabilizers on semen quality and sperm membrane protein expression during cryopreservation of goat semen

BACKGROUND

Semen cryopreservation is a complex process during which there is alteration in the expression of sperm and seminal plasma proteins, molecular weight of protein or loss of membrane proteins during the process. In order to compensate for these changes, different membrane stabilizers are used in freezing semen extenders. However, there is scarcity of such studies during cryopreservation of goat semen.

OBJECTIVE

To investigate the effect of membrane stabilizers on sperm membrane protein expression during cryopreservation of goat semen.

MATERIALS AND METHODS

A total of 36 semen ejaculates from nine Assam Hill Goat bucks aged 2 to 2.5 years was collected by artificial vagina method. Three membrane stabilizers, each at two different concentrations viz. 50 and 80 mM sucrose, 50 and 100 mM trehalose, and 100 and 150 ng per mL IGF-1 (insulin-like growth factor 1 protein) were added to Tris-citric acid fructose egg yolk glycerol (TCFEYG) extender and semen samples were cryopreserved. The sperm membrane protein profile was studied in fresh and cryopreserved semen by SDS-PAGE.

RESULTS

SDS- PAGE of sperm membrane extract of fresh semen revealed the presence of 24 protein bands with molecular weights ranging from 10 kDa to 240 kDa. Samples supplemented with 50 mM sucrose and 80 mM sucrose revealed 21 protein bands with molecular weights ranging from 10 kDa to 240 kDa. All the 21 protein bands were same as those observed in the sperm membrane of fresh spermatozoa, except that the 23 kDa, 29 kDa and 42 kDa bands were absent in frozen semen. Similarly, frozen semen extended with 50 mM trehalose and 100 mM trehalose revealed 22 protein bands with molecular weights ranging from 10 kDa to 240 kDa, but lacking the 29 kDa and 42 kDa bands. Proteins with molecular weights of 29 kDa, 130 kDa and 240 kDa were absent in frozen semen supplemented with 100 ng per mL IGF-1 and 150 ng per mL IGF-1.

CONCLUSION

The present study revealed that supplementation of tris basic extender with trehalose at 100 mM and or IGF-1 at 100 ng/mL or 150 ng per mL improves the post-thaw semen characteristics and protects certain fertility related sperm membrane proteins. Doi.org/10.54680/fr23510110612.

Narrative versus statistical messages: The interplay of perceived susceptibility and misperceptions on vaccine intention

Although there is enough scientific evidence to show the benefits and safety of vaccines, vaccine rates are low, while misperceptions about vaccines are on the rise. The main purposes of the current study are to 1) examine the effects of narrative vs. statistical messages on vaccine intention, 2) test the mediating role of perceived expectancies, and 3) examine the moderating roles of perceived susceptibility and misperceptions on vaccine intention. Data were collected with an online experiment through Amazon Mturk. The online experiment was conducted via Qualtrics once the study was considered exempt by the Institutional Research Board of a large University in the U.S. A total of 300 participants aged 18 and above completed the survey. Findings show that perceived expectancies mediate the relationship between message manipulation and vaccine intention. Our findings also show a three-way interaction which indicates that among individuals with high misperceptions, statistical messages are more persuasive for individuals with high perceived susceptibility, while narrative messages are more influential for individuals with low perceived susceptibility.

How Media Literacy, Trust of Experts and Flu Vaccine Behaviors Associated with COVID-19 Vaccine Intentions

PURPOSE

To assess how previous experiences and new information contributed to COVID-19 vaccine intentions.

DESIGN

Online survey (N = 1264) with quality checks.

SETTING

Cross-sectional U.S. survey fielded June 22-July 18, 2020.

SAMPLE

U.S. residents 18+; quotas reflecting U.S. Census, limited to English speakers participating in internet panels.

MEASURES

Media literacy for news content and sources, COVID-19 knowledge; perceived usefulness of health experts; if received flu vaccine in past 12 months; vaccine willingness scale; demographics.

ANALYSIS

Structural equation modelling.

RESULTS

Perceived usefulness of health experts (b = .422, P < .001) and media literacy (b = .162, P < .003) predicted most variance in vaccine intentions (R-squared=31.5%). A significant interaction (b = .163, P < .001) between knowledge (b = -.132, P = .052) and getting flu shot (b = .185, P < .001) predicted additional 3.5% of the variance in future vaccine intentions. An increase in knowledge of COVID-19 associated with a decrease in vaccine intention among those declining the flu shot.

CONCLUSION

The interaction result suggests COVID-19 knowledge had a positive association with vaccine intention for flu shot recipients but a counter-productive association for those declining it. Media literacy and trust in health experts provided strong counterbalancing influences. Survey-based findings are correlational; thus, predictions are based on theory. Future research should study these relationships with panel data or experimental designs.

Trust in Doctors, Positive Attitudes, and Vaccination Behavior: The Role of Doctor-Patient Communication in H1N1 Vaccination

Although there is a wide variety of scientific evidence that demonstrates the benefits of vaccination on a multitude of diseases, vaccination rates remain low while misperceptions about vaccines are on the rise. The primary objective of the present study is to examine the role of doctor-patient communication and vaccination. We test the impact of doctor-patient communication on trust in doctors' vaccine recommendations as a mediator, to understand the mechanisms leading to positive vaccination attitudes, and ultimately leading to actual H1N1 vaccination behavior. We use data from a nationally representative U.S. sample from one of the Multimedia Audience Research Systems (MARS) data sets collected by Kantar Media. Our results demonstrate the crucial role of doctor-patient communication in building patients' trust in doctors, which in turn positively impact vaccination attitudes and H1N1 vaccination behavior. Unlike other preventive health measures, getting vaccines after a pandemic is a critical decision because these vaccines are previously unknown. Our finding implies that verified communication from the physician's office may be one of the effective strategies during or after a pandemic. Our findings have implications for public health organizations to incorporate effective vaccination communication and could have critical implications for the COVID-19 vaccination.

Understanding CDC's Vaccine Communication during the COVID-19 Pandemic and Its Effectiveness in Promoting Positive Attitudes toward the COVID-19 Vaccine

The COVID-19 pandemic has imposed many communication challenges for public health authorities, especially communicating the safety, effectiveness, and importance of the COVID-19 vaccine. This study takes an integrative approach that includes a content analysis of COVID-19 vaccine-related messages from the CDC Facebook page and an experimental test of the effectiveness of the same types of vaccine-related messages on participants' attitudes toward the COVID-19 vaccine. Our findings from the content analysis show that gain-frame was used significantly more than loss-frame, and statistical evidence was more prevalent than narrative evidence in the CDC's COVID-19 vaccine-related messaging. Results from the experiment indicated that loss-framed, and messages with statistical evidence, may be more successful in promoting positive attitudes toward the COVID-19 vaccine.

Message framing and COVID-19 vaccination intention: Moderating roles of partisan media use and pre-attitudes about vaccination

One of the ways to overcome the sheer devastation of the COVID-19 pandemic is to get vaccinated. However, vaccine hesitancy could be a significant barrier. The main purposes of the current study are to examine the impact of four types of theory-driven messages on COVID-19 vaccination intention and to understand the moderating role of partisan media use and vaccination attitudes. The study used a between-subject randomized online experiment with four conditions. The manipulation messages were presented as screenshots from the CDC's Facebook page. The total number of participants were 387 (female 43%, mean age 37 years). The participants were from the U.S. and older than 18 years. The findings show that loss vs. gain message frames did not have any impact on COVID-19 vaccine intention. The moderating effects of conservative media and attitudes show that in general, those who consumed lower conservative media and held positive attitudes were higher on vaccine intention, and individual vs. collective frames did not have a strong impact. However, among those participants who scored high on conservative media use, and held negative vaccination attitudes, the individual frame had a higher impact on vaccine intention. The current study experimentally tested the intertwined relationships among message frames, partisan media use, and attitudes on vaccine intention. These relationships are critical considering the political nature of the pandemic.

SUPPLEMENTARY INFORMATION

The online version contains supplementary material available at 10.1007/s12144-022-02851-3.

Narrative messages, information seeking and COVID-19 vaccine intention: The moderating role of perceived behavioral control

Purpose

The main purposes of the current study are to examine 1) the influence of narrative vs statistics messages on COVID-19 related information seeking and COVID-19 vaccine intention and 2) the moderating role of perceived behavioral control (PBC).

Design

Data for a between-subject randomized experiment were collected online. The manipulation messages were presented as screenshots from the CDC’s Facebook page.

Setting

The participants were recruited from Amazon MTurk.

Subjects

A total of 300 subjects participated in the study, who were 18 years and above (M = 38.40).

Measures

Intention to seek information, COVID-19 vaccine intention, and PBC.

Analysis

To test the hypotheses, we utilized Hayes’s (2014) PROCESS for SPSS (Model 1). For intention to seek information, the main effect of the message manipulation (narrative vs statistics) [b = −2.10, t (300) = −4.14, P < .001] and the interaction [b = .41, t (300) = 3.88, P < .001] were significant. For vaccine intention, the main effects of message manipulation [b = 1.64, t (300) = −2.61, P < .005] and the interaction [b = .34, t (300) = 2.64, P < .005] were significant.

Results

Our research found that narrative messages were more persuasive for both information seeking and vaccine intention. But this was true only in the case of individuals whose PBC was low.

Conclusions

Our findings have critical implications for vaccine promotion research.

The dangers of blind trust: Examining the interplay among social media news use, misinformation identification, and news trust on conspiracy beliefs

Since the beginning of the COVID-19 pandemic, misinformation has been circulating on social media and multiple conspiracy theories have since become quite popular. We conducted a U.S. national survey for three main purposes. First, we aim to examine the association between social media news consumption and conspiracy beliefs specific to COVID-19 and general conspiracy beliefs. Second, we investigate the influence of an important moderator, social media news trust, that has been overlooked in prior studies. Third, we further propose a moderated moderation model by including misinformation identification. Our findings show that social media news use was associated with higher conspiracy beliefs, and trust in social media news was found to be a significant moderator of the relationship between social media news use and conspiracy beliefs. Moreover, our findings show that misinformation identification moderated the relationship between social media news use and trust. Implications are discussed.

Do Norms Matter? Examining Norm-Based Messages in HPV Vaccination Promotion

This research examines the influence of norm-based messages (positively worded descriptive vs. negatively worded descriptive vs. injunctive vs. basic information) on intentions and risk perceptions about receiving human papillomavirus (HPV) vaccination among young adults aged 18-29. Results from an experiment show that compared to the basic information condition, additional exposure to injunctive normative messages increased intention to seek further information about HPV vaccination, which in turn enhanced intention to get the vaccine. Negatively worded descriptive normative messaging should be used with caution since it resulted in the highest risk perceptions of the HPV vaccine, compared to positively worded descriptive norms and basic information messages. Theoretical and practical implications are further discussed.

Competitive framing, emotion and heterogeneity: framing effects on Twitter in the case of an alt-right rally

Purpose

The current study has three main purposes: (1) replicate results from prior framing effects studies on social media. To do so, the study examines the influence of news frames (free speech vs. public order) on participants' attitudes toward an alt-right rally (2) expand prior research by examining the emotional reaction of participants to these frames and (3) probe the moderating effects of face-to-face heterogenous talk and heterogenous social media feeds.

Design/methodology/approach

Drawing from theoretical concepts such as competitive framing, emotions and heterogeneity, the study uses a randomized online experiment. The study examines a conversation in a Twitter thread that includes both free speech and public order frames in the comments to the thread. The total number of participants was 275.

Findings

The results show that free speech versus public order frame did not impact attitudes of the participants toward the alt-right rally. Findings also show the significant main effects of free speech and public order frames and the interaction of exposure to heterogeneity on emotional reactions of outrage and anger toward the alt-right rally. These findings suggest that framing research needs to take social media features into consideration for a complete picture of framing effects on social media.

Originality/value

Using a classic framing effects experiment, the study includes variables relevant to social media discussions on Twitter and examined the moderating effects of heterogeneity on emotional reactions. In addition, one of the important methodological contributions of the current study are the framing manipulations for an externally valid experimental design.

COVID-19 Vaccination Attitudes and Intention: Message Framing and the Moderating Role of Perceived Vaccine Benefits

The United States is one of the hardest-hit countries by the COVID-19 pandemic and yet there is widespread hesitancy to take the vaccine. In order to address vaccine hesitancy and foster public understanding of the COVID-19 vaccine, it is necessary to strategize public health messages based on evidence. To this end, we use experimental data to examine the effects of four message frames on participants' attitudes toward the COVID-19 vaccine and their vaccine intention. The primary purposes of this paper are to examine the 1) impact of loss vs. gain frames and individual vs. collective frames and 2) role of perceived benefits on participants' attitudes toward the COVID-19 vaccine and their vaccine intention. Our findings show that participants with higher perceived benefits and exposed to the loss frame showed higher positive attitudes toward the COVID-19 vaccine and greater intention to vaccinate. Similar patterns were revealed in case of the individual frame message. Implications are discussed.

The Impact of Theory in HPV Vaccination Promotion Research: A Systematic Review and Meta-Analysis

OBJECTIVE

Numerous studies examined HPV vaccination promotional strategies. However, an overview of theory use, a synthesis of strategies' effectiveness and an examination of the moderating influence of theory are absent.

DATA SOURCE

We retrieved studies from Academic Search Complete, Business Source Complete, PubMed, PsycINFO, Web of Science, CMMC, CINAHL, and MEDLINE.

STUDY INCLUSION AND EXCLUSION CRITERIA

1) peer-reviewed articles written in English, 2) experimental or quasi-experimental, 3) measure HPV vaccination-related outcomes, 4) had to contain a control condition and report statistics necessary for conversion (for meta-analysis only).

DATA EXTRACTION

70 and 30 studies were included for the systematic review and meta-analysis respectively.

DATA SYNTHESIS

Four major categories were coded: study information, theory use, type of theory, and outcomes. Two independent coders coded the sample (Cohen's Kappa ranged from .8 to 1).

RESULTS

Most of the studies were based in the U.S. (77%, k = 54) with convenient samples (80%, k = 56), targeted toward females (46%, k = 32), and around a quarter did not employ any theories (47%, k = 33). Among theory-driven studies, the most commonly used were Framing (22%, k = 19), Health Belief Model (HBM; 13%, k = 12), and Narrative (7%, k = 6). Among controlled studies, promotional strategies were significantly more effective compared to the control (r+ = .25, p < .001). Strategies guided by the information, motivation, behavioral skills model (IMB) were more effective (r+ = .75, p < .001) than studies guided by framing theory (r+ = -.23, p < .001), HBM (r+ = .01, p < .001), and other theories (r+ = .11, p < .001).

CONCLUSION

This review contributes to HPV vaccination promotion literature by offering a comprehensive overview of promotional strategies and practical suggestions for future research and practices.

148 Superovulation and embryo production response in oestrus-synchronized Arunachali yak

The Arunachali breed of yak is reared by the Monpa pastoral community of Arunachal Pradesh in India for their livelihood and nutritional security on highland pastures. In addition to fulfilling the basic needs of highlanders, this animal is associated with poor production potential linked to its inherent reproductive problems, including silent oestrus, seasonality, and inbreeding, making yak rearing a less-profitable venture. In the recent past, efforts have been made to improve reproductive efficiency of Arunachali yak through assisted reproductive techniques. However, a few regimens for superovulation have been tried to date with limited success in terms of superovulatory response and embryo recovery. Therefore, the present study was undertaken to evaluate the efficacy of two different doses and regimes of superovulation: Stimufol (400 and 200µg per animal) and Folligon (1500 and 1000IU per animal) in Arunachali yak. Twenty-four yaks were allotted in 4 groups (of 6 animals each) and subjected to respective superovulation treatment. Thereafter, the treatment response was assessed in terms of expression of oestrus, interval between treatment and oestrus onset, duration of oestrous, number of corpora lutea and embryos recovered, and analysed using two-way statistical analysis between treatment groups. The results (Table 1) showed a significant (P&lt;0.01) variation in onset of oestrus after the treatment, whereas other responses did not differ among the groups. Further, the recovered embryos were categorized as excellent, good, fair, and poor according to cell size, shape, texture, and number of vesicles present in the blastomeres; 58.33, 20.83, 8.33, and 12.5% embryos in these categories were recovered, respectively. The overall embryo recovery rate was 30.77%, ranging from 10.53 to 52.38% in different treatment groups. The numbers of embryos recorded were less than the numbers of CL present, showing the possibility of non-availability of all ovulated oocytes for fertilization in the oviduct due to untrapping by the fimbriae. The effectiveness of treatments depended upon the precision of oestrus detection and the time of ovulation. In our study, the variation in onset of oestrus might be associated with poor expression of behavioural oestrus in the treated animals. Based on the present findings, we conclude that all the treatments are effective in superovulation and embryo recovery. However, the use of Folligon at 1500IU seemed to be comparatively more effective in Arunachali yak. Table 1. Mean (n=6) average of treatment responses in yak following different superovulatory treatment Variable Treatment Stimufol Folligon 400 µg/animal 200 µg/animal 1500 IU/animal 1000 IU/animal Oestrus response (%) 100 100 100 100 Interval between treatment and oestrus onset (h) 17.67±0.56a 20.83±0.79b 21.17±0.79bc 23.67±1.43c Duration of oestrous (h) 30.33±1.09 28.50±0.99 31.50±1.50 28.83±1.25 Corpora lutea (n) 2.83±1.22 3.50±1.18 3.50±0.67 3.17±0.87 Embryo recovered (n) 0.83±0.83 1.00±0.81 1.83±0.98 0.33±0.21 Recovery rate (%) 29.41 28.57 52.38 10.53 a–cMeans within a row with different superscripts differ P&lt;0.05.

Investigating the efficacy of a self-directed parenting intervention to reduce risky behaviors among college students: Study protocol for a multi-arm hybrid type 2 randomized control trial

BACKGROUND

Early adulthood is a critical developmental period when many youth transition from living at home to the relative autonomy of college. This transition results in increased opportunity for positive growth and identity development - and for risky substance use and sexual behaviors. Parents continue to influence young adult behavior even from a distance; however, few studies have rigorously tested parent-college student interventions.

METHODS

This multi-arm hybrid type 2 trial tests the short- and long-term efficacy of a self-directed handbook for parents of first-year college students. In the summer before college, parent-student dyads are randomly assigned to one of three conditions: control, Parent Handbook, or Parent Handbook Plus. Handbook parents receive encouragement via phone calls to read the handbook and complete activities with their student before leaving for college. Handbook Plus parents also receive booster messages targeted at risky or stressful times. Participants complete surveys of intervention-targeted knowledge, attitudes, and behaviors at baseline and four months after baseline. Students complete three additional surveys at nine, 16, and 21 months after baseline. Dyads in the intervention conditions also reported on handbook utilization, perceived usefulness, and engagement with intervention materials.

DISCUSSION

Self-directed family interventions may be a feasible strategy for involving parents of college students. This trial aimed to determine: 1) the efficacy of a self-directed handbook intervention for parents of first-year college students, including whether the addition of periodic booster messages enhanced efficacy; and 2) how variations in handbook utilization, perceived usefulness, and engagement were linked to student outcomes.

A Social Networks Approach to Understanding Vaccine Conversations on Twitter: Network Clusters, Sentiment, and Certainty in HPV Social Networks

Individuals increasingly rely on the Internet, and social media in particular, for health-related information. A recent survey reports that 80% of Internet users search for health information online. In the present study, we employ Twitter data to understand content characteristics and the patterns of content flow of the conversations about the HPV vaccine debate. Approaching the HPV vaccine conversations on Twitter as a social network, we can identify key self-formed subgroups-clusters of users who create "siloes" of interactions and information flow. Combining network analysis, computer-aided content analysis, and human-coded content analysis, we explored the communication dynamics within the groups in terms of group members' affective and cognitive characteristics. Our findings show that positive emotion is positively correlated with cluster density, an indicator of strong ties and rapid information flow. In the case of negative emotion, we found that anger is a significant negative predictor for graph density. We also found a correlation between certainty and tentativeness; both at cluster as well as at tweet level, suggesting that clusters bring together people who are sure about the HPV vaccine and people who are exploring for answers.

Effect of Butylated Hydroxy Toluene and Vitamin E on the Cryosurvivability of Buck Semen

BACKGROUND

The quality of frozen semen can be improved by supplementing Tris extender with antioxidant to prevent oxidation and maintain sperm motility.

OBJECTIVE

To study the effects of adding combinations of suitable concentrations of butylated hydroxy toluene (BHT) and Vitamin E in Tris extender on the quality of frozen goat semen.

MATERIALS AND METHODS

A total of 40 ejaculates collected from five Beetal bucks were used to study the effect on the quality of frozen semen of supplementing Tris extender with 200 µM BHT, 2 mM Vitamin E and 200 µM BHT + 2 mM Vitamin E.

RESULTS

The sperm motility, live sperm, live intact acrosome and HOST-reacted sperm differed significantly (P<0.01) between stages and between antioxidants. There was no significant difference (P<0.05) in interaction between stages (equilibration, freezing) and antioxidants, except for HOST-reacted sperm. Critical difference test revealed that Tris extender containing 2 mM vitamin E showed significantly (P<0.05) higher sperm motility, live sperm, live intact acrosome and HOST-reacted sperm, and significantly (P<0.05) lower release of alanine transaminase (ALT) and aspartate transaminase (AST).

CONCLUSION

Supplementation of Tris extender with 2 mM vitamin E maintained superior quality of frozen Beetal buck semen.

The Importance of 'Likes': The Interplay of Message Framing, Source, and Social Endorsement on Credibility Perceptions of Health Information on Facebook

Online sources not only permeate the information-seeking environment of the younger generation, but also have profound influence in shaping their beliefs and behaviors. In this landscape, examining the factors responsible for credibility perceptions of online information is fundamental, particularly for health-related information. Using a 2 (frames: gain vs. loss) × 2 (source: expert vs. non-expert) × 2 (social endorsement: high vs. low) randomized between-subjects experimental design, this study examines the effect of health message framing and the moderating effects of social endorsement and source type on credibility perceptions of Facebook posts. Testing across two issues--physical activity and alcohol consumption--findings indicate that the gain-framed message was perceived as most credible. Additionally, significant three-way interactions suggest that social endorsement and source type affect the relationship between message framing and credibility perceptions. Specifically, the findings demonstrate that a gain-framed message from an expert source with high number of 'likes' is considered the most credible message. These findings have significant implications for information gathering from social media sources, such as the influence of 'likes' on health information.

Detection of classical swine fever virus E2 gene in cattle serum samples from cattle herds of Meghalaya

The present study focused on the detection and genetic characterisation of 5' untranslated region (5'UTR) and E2 gene of classical swine fever virus (CSFV, family Flaviviridae, genus Pestivirus) from bovine population of the northeastern region of India. A total of 134 cattle serum samples were collected from organised cattle farms and were screened for CSFV antigen with a commercial antigen capture enzyme linked immunosorbent assay (Ag-ELISA) and reverse transcription-polymerase chain reaction (RT-PCR). A total of 10 samples were positive for CSFV antigen by ELISA, while all of them were positive in PCR for 5'UTR region. Full length E2 region of CSFV were successfully amplified from two positive samples and used for subsequent phylogenetic analysis and determination of protein 3D structure which showed similarity with reported CSFV isolate from Assam of sub-genogroup 2.1, with minor variations in protein structure.

Association of the Apolipoprotein A-I Gene Polymorphisms with Cardiovascular Disease Risk Factors and Atherogenic Indices in Patients from Assam, Northeast India

Cardiovascular disease (CVD) risk factors, and particularly decreased high density lipoprotein cholesterol (HDL-C) dyslipidemia are prevalent in Assam, India. This study was undertaken to investigate whether Apolipoprotein A-I (APOA1) gene polymorphisms (G-75A and C+83T) were associated with i) the risk for decreased HDL-C, and ii) other CVD risk factors, viz. serum lipids, atherogenic indices, obesity, and blood pressure (BP). A total of 649 subjects were screened, from which 200 eligible individuals, classified as case group with decreased HDL-C levels (100 subjects) and control group with normal HDL-C levels (100 subjects) were enrolled and genotyped using polymersase chain reaction-restriction fragment length polymorphism (PCR-RFLP) and DNA sequencing. Lipid fractions [HDL-C, total cholesterol (TC), low density lipoprotein cholesterol (LDL-C), very low density lipoprotein cholesterol (VLDL-C), triglycerides (TG)] and atherogenic indices [Castelli's Risk Indices-I and -II (CRI-I and -II), non-HDL-C fraction, atherogenic index of plasma (AIP), atherogenic coefficient (AC)] were estimated. The G-75A and C+83T loci were not associated with decreased HDL-C risk. This was confirmed across different genetic models (dominant, recessive, additive and allelic). Association was also absent with BP and obesity. However, the G-75A locus was associated with LDL-C, whereas the C+83T locus was associated with TG and VLDL-C. Furthermore, these sites had effects on atherogenic indices. The rare A allele at the G-75A locus was associated with adverse CRI-I, CRI-II, non-HDL-C and AC values, while the major C allele at the C+83T locus was associated with adverse AIP values. Thus, the pro-atherogenic G-75A polymorphism and the anti-atherogenic C+83T polymorphism represent important genetic loci that modulate CVD risk factors in subjects from Assam.

Cumulus cell expansion and ultrastructural changes in in vitro matured bovine oocytes under heat stress

Cumulus-oocyte complexes (COCs) from cows were matured under normal (38.5°C) and elevated temperatures (41°C) simulating heat stress and their maturation was assessed based on measurement of cumulus expansion in both groups. There was a significant reduction (P<0.01) in maturation rate in the heat stressed oocytes. The ultrastructural events associated with in vitro oocyte maturation and changes associated with elevated temperature were also studied by transmission electron microscopy (TEM). Normal maturation cellular events were marked by migration of Golgi and mitochondria from the cortical regions, and conversely by a migration of cortical granules from the inner regions to a sub-perivitelline zone. Heat stressed oocytes (41°C) were not only marked by a reduction in rate and less cumulus cell expansion, but also by a reduction in cortical granule migration. The mitochondria appeared swollen with cristolysis. Ribosomal disruption and an abundance of free ribosomes were also seen. Changes in the cumulus cells include nuclear chromatin margination, condensation and karyolysis, formation of nuclear and cell membrane blebs, and typical membrane bound vesicles enclosing cell fragments indistinguishable from apoptosis. Evidently, heat stress can be associated with reduced cytoplasmic events of oocyte maturation, thereby decreasing the oocyte competence and can be associated with apoptosis of the cumulus cells and therefore compromise the survival of the oocyte itself.

Isolation and characterization of Shiga toxigenic Escherichia coli of animal and bird origin by multiplex polymerase chain reaction

AIM

The purpose of this study was to determine the virulence genes and serotype of Shiga toxin producing Escherichia coli (STEC) strains isolated from animals and birds.

MATERIALS AND METHODS

A total of 226 different samples viz., fecal, intestinal content, rectal swab and heart blood were collected from different clinically affected/healthy animals and birds and were streaked on McConkeys' lactose agar and eosin methylene blue agar for isolation of E. coli, confirmed by staining characteristics and biochemical tests. By polymerase chain reaction (PCR) all the E. coli isolates were screened for certain virulence genes, viz., Shiga toxin 1 (stx1), stx2 and eae and enterohemolytic (Ehly) phenotype was observed in washed sheep blood agar plate. All the isolated E. coli strains were forwarded to the National Salmonella and Escherichia Centre, Central Research Institute, Kasauli (Himachal Pradesh) for serotyping.

RESULTS

Out of 226 samples 138 yielded E. coli. All the isolates were screened for molecular detection of different virulent genes, viz. stx1, stx2 and eae, based on which 36 (26.08%) were identified as STEC. Among those STEC isolates, 15 (41.67%), 14 (38.89%), 1 (2.78%) exhibited eae, stx2, stx1 alone, respectively, whereas 4 (11.11%) and 2 (5.56%) carried both stx1 and stx2, stx2 and eae, respectively. Among the STEC isolates 22 were belonged to 15 different sero-groups, viz., O2, O20, O22, O25, O43, O60, O69, O90, O91, O95, O106, O118, O130, O162 and O170 and others were untypable. Ehly phenotype was observed in 10 (27.78%) the STEC isolates.

CONCLUSION

The present study concluded that STEC could be isolated from both clinically affected as well as healthy animals and birds. Regular monitoring of more samples from animal and bird origin is important to identify natural reservoir of STEC to prevent zoonotic infection.

Adrenocortical carcinoma: An extremely uncommon entity and the role of Immunohistochemistry in its diagnosis

Adrenocortcal carcinoma is an extremely uncommon entity with an incidence of two in one millionth population. Here we present a 60 year gentleman with pain in abdomen, nausea, and backache, and weight loss. Contrast enhanced computed tomography (CECT) abdomen revealed a heterogenous well defined mass measuring (15 × 10.3 × 13) cm(3) on the left suprarenal region with central necrosis which extended medially up to the midline. Locally, the growth infiltrated the upper pole of left kidney. Initially, the differential diagnosis included that of renal cell carcinoma arising from upper pole of left kidney involving adrenal gland. The patient underwent left radical nephrectomy and left adrenalectomy. Histological evaluation could not differentiate it from of malignant pheochromocytoma, but immunohistochemistry confirmed it as adrenocortical carcinoma. This case highlights the crucial role of immunohistochemistry in establishing the diagnosis like tumors.

Message design strategies to raise public awareness of social determinants of health and population health disparities

CONTEXT

Raising public awareness of the importance of social determinants of health (SDH) and health disparities presents formidable communication challenges.

METHODS

This article reviews three message strategies that could be used to raise awareness of SDH and health disparities: message framing, narratives, and visual imagery.

FINDINGS

Although few studies have directly tested message strategies for raising awareness of SDH and health disparities, the accumulated evidence from other domains suggests that population health advocates should frame messages to acknowledge a role for individual decisions about behavior but emphasize SDH. These messages might use narratives to provide examples of individuals facing structural barriers (unsafe working conditions, neighborhood safety concerns, lack of civic opportunities) in efforts to avoid poverty, unemployment, racial discrimination, and other social determinants. Evocative visual images that invite generalizations, suggest causal interpretations, highlight contrasts, and create analogies could accompany these narratives. These narratives and images should not distract attention from SDH and population health disparities, activate negative stereotypes, or provoke counterproductive emotional responses directed at the source of the message.

CONCLUSIONS

The field of communication science offers valuable insights into ways that population health advocates and researchers might develop better messages to shape public opinion and debate about the social conditions that shape the health and well-being of populations. The time has arrived to begin thinking systematically about issues in communicating about SDH and health disparities. This article offers a broad framework for these efforts and concludes with an agenda for future research to refine message strategies to raise awareness of SDH and health disparities.

Molecular characterization of shiga like toxin-producing Escherichia coli (STEC) isolates from pigs oedema

BACKGROUND & OBJECTIVE

An oedema outbreak occurred in a Guwahati pig farm. Escherichia coli isolates from different necropsy samples collected from the dead piglets with oedema were characterized to confirm the virulence.

METHODS

Haemolytic E. coli isolates recovered from liver, lung and intestine of pigs with oedema were examined for presence of genes encoding pathogroups such as enteropathogenic Escherichia coli (EPEC), (eae/bfpA), enteroaggregative Escherichia coli (EAggEC), (eagg), enterotoxigive Escherichia coil (ETEC), (elt/est) and shiga like toxin producing Escherichia coli (STEC), (stx1/ stx2) by PCR and molecular typing by randomly amplified polymorphic DNA-PCR (RAPD-PCR).

RESULTS

The three haemolytic E. coli recovered from diseased pigs were STEC because of presence of the stx2 and eae genes. Analysis by RAPD-PCR indicated that two of the three isolates were genetically related.

INTERPRETATION & CONCLUSION

The isolation of STEC isolates from pigs with oedema was shown. Although the three isolates were untypable, presence of eae and stx2 genes clearly indicated these as prime cause of pig oedema disease. Further, demonstration of STEC in pigs becomes a public health concern, as pigs are potential reservoir of such agents, which may cause human illness.