BACKGROUND:This paper examines the individual factors that influence prevalence rates of canine heartworm in the contiguous United States. A data set provided by the Companion Animal Parasite Council, which contains county-by-county results of over nine million heartworm tests conducted during 2011 and 2012, is analyzed for predictive structure. The goal is to identify the factors that are important in predicting high canine heartworm prevalence rates.METHODS:The factors considered in this study are those envisioned to impact whether a dog is likely to have heartworm. The factors include climate conditions (annual temperature, precipitation, and relative humidity), socio-economic conditions (population density, household income), local topography (surface water and forestation coverage, elevation), and vector presence (several mosquito species). A baseline heartworm prevalence map is constructed using estimated proportions of positive tests in each county of the United States. A smoothing algorithm is employed to remove localized small-scale variation and highlight large-scale structures of the prevalence rates. Logistic regression is used to identify significant factors for predicting heartworm prevalence.RESULTS:All of the examined factors have power in predicting heartworm prevalence, including median household income, annual temperature, county elevation, and presence of the mosquitoes Aedes trivittatus, Aedes sierrensis and Culex quinquefasciatus. Interactions among factors also exist.CONCLUSIONS:The factors identified are significant in predicting heartworm prevalence. The factor list is likely incomplete due to data deficiencies. For example, coyotes and feral dogs are known reservoirs of heartworm infection. Unfortunately, no complete data of their populations were available. The regression model considered is currently being explored to forecast future values of heartworm prevalence.

The aim of this research was to investigate the HIV knowledge and risk behaviours of students as well as to deteremine whether the youth are aware of and utilising loveLife services. This was demonstrated with the HIV knowledge and risky behaviours of respondents using loveLife as their source of HIV information. Data was gathered by administering open-ended and close-ended questionnaires to 152 South African students aged 18—25 years old studying at Johannesburg, Braamfontein tertiary institutions. These questionnaires were structured to include the following information: the demography , condom attitude scale, the current and previous sexual behaviours, socio-sexual orientation index (SOI), self-efficacy for protective sexual behaviours scale, HIV and AIDS knowledge and understanding questionnaire,as well as the loveLife exposure, participation and response questionnaire. The data analysis techniques included statistical techniques of frequency counts, cross tabulations, Chi Square tests of associations, Point Biserial correlations, two independent t-test and Mann-Whitney U test, which were applied to all quantitative data; whereas thematic content analysis was applied to the open-ended questionnaire (qualitative data). Results revealed that young people are aware of loveLife services but are not utilising them. Respondents generally had good but biased HIV knowledge and increased HIV sexual risk behaviours. However, insignificant associations were found between awareness and utilisation of loveLife services and HIV knowledge and understanding, and sexual risk behaviours. The implications of the current study and recommendations for future studies are discussed.

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U.S. Air Force (USAF) active duty Airmenshowunusually high tobacco prevalence rates (TPR); i.e., smoke, smokeless, both(SSL-B), when compared to civilian publics in the United States. Tobacco control efforts have proven largely ineffective inlowering nicotine habits among Airmen, while outdoor designated tobacco areas (DTAs) sited near worksites and popular localeson USAF bases (USAFBs) likelyswayAirmen to continue riskynicotine habits. The aim of this inquiry was to assess whetherquantities of DTAs on USAFBs and U.S. airbases (USABs) with 4 mediator variables(quality of DTAs,sites of DTAs, execution of a tobacco cessation program, and types of tobacco cessation programs) wereassociated with TPR (SSL-B) among Airmen at 21 sampled USAF installations worldwide. Organizational cultural theory was the theoretical outline chosen. One USAF surveillance system was accessed,and a survey tool was providedby15 USAF health promotion coordinators and6base civil engineer staff.Correlation assessments and regression analyses were conducted to analyze the survey data. The results of the study revealed that there was a moderate positive correlation among quantities of DTAs and TPR(SSL-B) withAirmen across sampled USAF installations(r= .56, p< .01), and there was a low positive correlation between quantities of DTAs on lower security threat USABs and Airmenpopulace numbers(r= .10, p< .048). Quantities of DTAs were also the strongest predictor of TPR (SSL-B) among Airmen[F(2, 18) = .00, p< .013].Results indicate that fewer or no DTAs on USAFBsand USABs could positively improve the health statuses of active duty USAF Airmen and civilian forces, improve mission duties, lessen health care costs, and foster tobacco-free lifestyles as the normalized behavior on U.S. military installations, and thus promote social change.

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