Browsing by Subject "Mexico"
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Item Determining Perceived Self-Efficacy for Preventing Dengue Fever in Two Climatically Diverse Mexican States: A Cross-Sectional Study(MDPI, 2022-03-28) Annan, Esther; Angulo-Molina, Aracely; Yaacob, Wan Fairos Wan; Kline, Nolan; Lopez-Lemus, Uriel A.; Haque, UbydulKnowledge of dengue fever and perceived self-efficacy toward dengue prevention does not necessarily translate to the uptake of mosquito control measures. Understanding how these factors (knowledge and self-efficacy) influence mosquito control measures in Mexico is limited. Our study sought to bridge this knowledge gap by assessing individual-level variables that affect the use of mosquito control measures. A cross-sectional survey with 623 participants was administered online in Mexico from April to July 2021. Multiple linear regression and multiple logistic regression models were used to explore factors that predicted mosquito control scale and odds of taking measures to control mosquitoes in the previous year, respectively. Self-efficacy (beta = 0.323, p-value = < 0.0001) and knowledge about dengue reduction scale (beta = 0.316, p-value =< 0.0001) were the most important predictors of mosquito control scale. The linear regression model explained 24.9% of the mosquito control scale variance. Increasing age (OR = 1.064, p-value =< 0.0001) and self-efficacy (OR = 1.020, p-value = 0.0024) were both associated with an increase in the odds of taking measures against mosquitoes in the previous year. There is a potential to increase mosquito control awareness and practices through the increase in knowledge about mosquito reduction and self-efficacy in Mexico.Item Fecal Coliforms in the Rio Grande: A Risk to Human Health(2004-12-01) Tompkins, Erin L.; Thomas Vaughan; Claudia S. CogginTompkins, Erin L., Fecal Coliforms in the Rio Grande: A Risk to Human Health. Master of Public Health (Environmental Health), December 2004, 45 pages, bibliography, 33 titles. The Rio Grande around Laredo, Texas/Nuevo Laredo, Mexico was designated for primary contact reaction by the EPA. However, monthly sampling over a ten-year period in this section of the river may show otherwise. Fecal contamination of the Rio Grande in this area may be a source of illness to the population. Four sites in Laredo area were tested for fecal coliform density and rate of flow. Rainfall data from the USGS was used for comparisons. The rate of flow of the Rio Grande had an impact on fecal coliform density at one site measured. Rainfall in Laredo had an impact on fecal coliform density at two measured sites, and was a significant predictor of density at these sites as well. A review of the designation for this river segment is recommended. More research is needed to determine the exposed population, and effects of high coliform densities on downstream communities.Item Moderation effects of serotype on dengue severity across pregnancy status in Mexico(BioMed Central Ltd., 2023-03-11) Annan, Esther; Nguyen, Uyen-Sa D. T.; Trevino, Jesus; Wan Yaacob, Wan F.; Mangla, Sherry; Pathak, Ashok K.; Nandy, Rajesh; Haque, UbydulBACKGROUND: Pregnancy increases a woman's risk of severe dengue. To the best of our knowledge, the moderation effect of the dengue serotype among pregnant women has not been studied in Mexico. This study explores how pregnancy interacted with the dengue serotype from 2012 to 2020 in Mexico. METHOD: Information from 2469 notifying health units in Mexican municipalities was used for this cross-sectional analysis. Multiple logistic regression with interaction effects was chosen as the final model and sensitivity analysis was done to assess potential exposure misclassification of pregnancy status. RESULTS: Pregnant women were found to have higher odds of severe dengue [1.50 (95% CI 1.41, 1.59)]. The odds of dengue severity varied for pregnant women with DENV-1 [1.45, (95% CI 1.21, 1.74)], DENV-2 [1.33, (95% CI 1.18, 1.53)] and DENV-4 [3.78, (95% CI 1.14, 12.59)]. While the odds of severe dengue were generally higher for pregnant women compared with non-pregnant women with DENV-1 and DENV-2, the odds of disease severity were much higher for those infected with the DENV-4 serotype. CONCLUSION: The effect of pregnancy on severe dengue is moderated by the dengue serotype. Future studies on genetic diversification may potentially elucidate this serotype-specific effect among pregnant women in Mexico.Item Stress and Social Support as Risk Factors for the Occurrence of Neural Tube Defect-Affected Pregnancies in Women Living Along the Texas-Mexico Border(1999-06-01) Herron, Kathryn M.; Antonio Rene; John Licciardone; Gilbert RamirezHerron, Kathryn M., Stress and Social Support as Risk Factors for the Occurrence of Neural Tube Defect-Affected Pregnancies in Women Living Along the Texas-Mexico Border. Master of Public Health, June, 1999, 59 pp., 8 tables, 1 figure, references, 78 titles. Data were derived from the case-control study of the Texas Department of Health’s Neural Tube Defect Project, involving women living along the Texas-Mexico border, June 1995 to October 1998. Social support and stress information was obtained from a questionnaire, and a residual stress scale was created to determine an aggregate measure for each subject. Interviews were conducted with 261 women, with 1.2 controls to each case. Having high residual stress was found to be a significant risk factor for NTDs. Other significant risk factors included periconceptional injury, residential mobility, having no relatives to talk about private matters, and discontent with relationships.Item The Population Abundance and Associated Geographic and Demographic Factors of the Dengue Vectors, Aedes Aegypti and Aedes Albopictus in Dallas County, TX, USA(2007-05-01) Stahl, Matthew S.; Sue Lurie; Joon-Hak LeeStahl, Matthew S., The Population Abundance and Associated Geographic and Demographic factors of the Dengue Vectors Aedes aegypti and Aedes albopictus in Dallas County, TX. Master of Public Health (Environmental Health), May 2007, 40 pp., 7 figures, 2 tables, bibliography, 72 titles. The risk for dengue outbreak was assessed in North Central Texas in 2006 in response to increased case numbers in Texas and Mexican states in 2005. Data were collected from 54 sites in Dallas County, TX using oviposition traps and estimates from U.S. Census and Sourcebook America databases. Higher vegetation and shade displayed more Aedes species; standing water also showed more Aedes albopictus. Lower home values and lower incomes corresponded to more Aedes aegypti; lower household density displayed more Aedes albopictus. Other socio-economic and demographic factors did not have significant association with abundance. The methodology of this study may serve as a model for assessment of dengue vector abundance in other regions.