5 results on '"Alejandro Balanzar-Martínez"'
Search Results
2. Dengue occurrence relations and serology: cross-sectional analysis of results from the Guerrero State, Mexico, baseline for a cluster-randomised controlled trial of community mobilisation for dengue prevention
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Maria de Lourdes Soto-Ríos, Pedro Antonio Morales-Nava, Josefina Coloma, Sergio Paredes-Solís, Neil Andersson, Eva Harris, Abel Jiménez-Alejo, José Legorreta-Soberanis, Ofelia Rodríguez-Ramírez, Miguel Flores-Moreno, Elizabeth Nava-Aguilera, Alejandro Balanzar-Martínez, Robert J. Ledogar, David Gasga-Salinas, and Arcadio Morales-Pérez
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Male ,Veterinary medicine ,Mosquito Control ,Multivariate analysis ,Cross-sectional study ,Dengue fever ,Dengue ,0302 clinical medicine ,Residence Characteristics ,Surveys and Questionnaires ,Epidemiology ,Prevalence ,030212 general & internal medicine ,Cluster randomised controlled trial ,Child ,Aged, 80 and over ,Family Characteristics ,education.field_of_study ,lcsh:Public aspects of medicine ,Middle Aged ,Serology ,Child, Preschool ,Female ,Infection ,Adult ,medicine.medical_specialty ,Adolescent ,030231 tropical medicine ,Population ,Enzyme-Linked Immunosorbent Assay ,Young Adult ,03 medical and health sciences ,Environmental health ,medicine ,Humans ,education ,Mexico ,Aged ,business.industry ,Research ,Public health ,Infant, Newborn ,Public Health, Environmental and Occupational Health ,Infant ,lcsh:RA1-1270 ,medicine.disease ,Cross-Sectional Studies ,Socioeconomic Factors ,Risk factors ,Multivariate Analysis ,Biostatistics ,business - Abstract
Background The Mexican arm of the Camino Verde trial of community mobilisation for dengue prevention covered three coastal regions of Guerrero state: Acapulco, Costa Grande and Costa Chica. A baseline cross-sectional survey provided data for community mobilisation and for adapting the intervention design to concrete conditions in the intervention areas. Methods Trained field teams constructed community profiles in randomly selected clusters, based on observation and key informant interviews. In each household they carried out an entomological inspection of water containers, collected information on socio-demographic variables and cases of dengue illness among household members in the last year, and gathered paired saliva samples from children aged 3–9 years, which were subjected to ELISA testing to detect recent dengue infection. We examined associations with dengue illness and recent dengue infection in bivariate and then multivariate analysis. Results In 70/90 clusters, key informants were unable to identify any organized community groups. Some 1.9% (1029/55,723) of the household population reported dengue illness in the past year, with a higher rate in Acapulco region. Among children 3–9 years old, 6.1% (392/6382) had serological evidence of recent dengue infection. In all three regions, household use of anti-mosquito products, household heads working, and households having less than 5 members were associated with self-reported dengue illness. In Acapulco region, people aged less than 25 years, those with a more educated household head and those from urban sites were also more likely to report dengue illness, while in Costa Chica and Costa Grande, females were more likely to report dengue illness. Among children aged 3–9 years, those aged 3–4 years and those living in Acapulco were more likely to have evidence of recent dengue infection. Conclusions The evidence from the baseline survey provided important support for the design and implementation of the trial intervention. The weakness of community leadership and the relatively low rates of self-reported dengue illness were challenges that the Mexican intervention team had to overcome. The higher dengue illness occurrence among women in Costa Grande and Costa Chica may help explain why women participated more than men in activities during the Camino Verde trial.
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- 2017
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3. 'Where we put little fish in the water there are no mosquitoes:' a cross-sectional study on biological control of the Aedes aegypti vector in 90 coastal-region communities of Guerrero, Mexico
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Liliana Morales-Nava, Víctor Manuel Alvarado-Castro, Alejandro Balanzar-Martínez, Arcadio Morales-Pérez, José Legorreta-Soberanis, Eva Harris, Neil Andersson, Josefina Coloma, Elizabeth Nava-Aguilera, Antonio Juan Cortés-Guzmán, Anne Cockcroft, Robert J. Ledogar, and Mónica Violeta Bonilla-Leon
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Rural Population ,Insecticides ,Multivariate analysis ,Mosquito Control ,Cross-sectional study ,Dengue virus ,medicine.disease_cause ,Dengue fever ,Dengue ,0302 clinical medicine ,Aedes aegypti ,Aedes ,Surveys and Questionnaires ,Epidemiology ,Odds Ratio ,Medicine ,030212 general & internal medicine ,Recent dengue virus infection ,Child ,Family Characteristics ,biology ,lcsh:Public aspects of medicine ,Fishes ,Pupa ,Pupa productivity ,Child, Preschool ,Larva ,Temefos ,medicine.medical_specialty ,030231 tropical medicine ,03 medical and health sciences ,Fish-based control ,Water Supply ,Larvivorous ,Environmental health ,Animals ,Humans ,Mexico ,business.industry ,Research ,Public Health, Environmental and Occupational Health ,Water ,lcsh:RA1-1270 ,medicine.disease ,biology.organism_classification ,Virology ,Insect Vectors ,Cross-Sectional Studies ,Vector (epidemiology) ,Rural area ,business - Abstract
Background In the Mexican state of Guerrero, some households place fish in water storage containers to prevent the development of mosquito larvae. Studies have shown that larvivorous fish reduce larva count in household water containers, but there is a lack of evidence about whether the use of fish is associated with a reduction in dengue virus infection. We used data from the follow up survey of the Camino Verde cluster randomised controlled trial of community mobilisation to reduce dengue risk to study this association. Methods The survey in 2012, among 90 clusters in the three coastal regions of Guerrero State, included a questionnaire to 10,864 households about socio-demographic factors and self-reported cases of dengue illness in the previous year. Paired saliva samples provided serological evidence of recent dengue infection among 4856 children aged 3–9 years. An entomological survey in the same households looked for larvae and pupae of Aedes aegypti and recorded presence of fish and temephos in water containers. We examined associations with the two outcomes of recent dengue infection and reported dengue illness in bivariate analysis and then multivariate analysis using generalized linear mixed modelling. Results Some 17% (1730/10,111) of households had fish in their water containers. The presence of fish was associated with lower levels of recent dengue virus infection in children aged 3–9 years (OR 0.64; 95% CI 0.45–0.91), as was living in a rural area (OR 0.57; 95% CI 0.45–0.71), and being aged 3–5 years (OR 0.65; 95% CI 0.51–0.83). Factors associated with lower likelihood of self-reported dengue illness were: the presence of fish (OR 0.79; 95% CI 0.64–0.97), and living in a rural area (OR 0.74; 95% CI 0.65–0.84). Factors associated with higher likelihood of self-reported dengue illness were: higher education level of the household head (OR 1.28; 95% CI 1.07–1.52), living in a household with five people or less (OR 1.33; 95% CI 1.16–1.52) and household use of insecticide anti-mosquito products (OR 1.68; 95% CI 1.47–1.92). Conclusions Our study suggests that fish in water containers may reduce the risk of dengue virus infection and dengue illness. This could be a useful part of interventions to control the Aedes aegypti vector.
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- 2017
4. Aedes aegypti breeding ecology in Guerrero: cross-sectional study of mosquito breeding sites from the baseline for the Camino Verde trial in Mexico
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Robert J. Ledogar, Irma Esther Rodríguez-Ramos, Neil Andersson, Alejandro Balanzar-Martínez, Anne Cockcroft, Sergio Paredes-Solís, Arcadio Morales-Pérez, José Legorreta-Soberanis, Elizabeth Nava-Aguilera, David Gasga-Salinas, Antonio Juan Cortés-Guzmán, Felipe Gil Armendariz-Valle, and Alba Meneses-Rentería
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Rural Population ,Veterinary medicine ,Mosquito Control ,Urban Population ,Cross-sectional study ,Pupal productivity ,030231 tropical medicine ,Nicaragua ,Aedes aegypti ,medicine.disease_cause ,Dengue ,03 medical and health sciences ,0302 clinical medicine ,Aedes ,Residence Characteristics ,Water Supply ,Environmental health ,Infestation ,medicine ,Animals ,Humans ,030212 general & internal medicine ,Cluster randomised controlled trial ,Baseline (configuration management) ,Mexico ,Family Characteristics ,biology ,Temephos ,Ecology ,business.industry ,lcsh:Public aspects of medicine ,Research ,Reproduction ,Public Health, Environmental and Occupational Health ,Pupa ,Water ,lcsh:RA1-1270 ,biology.organism_classification ,Insect Vectors ,Cross-Sectional Studies ,Productivity (ecology) ,Socioeconomic Factors ,Larva ,Multivariate Analysis ,Biostatistics ,Rural area ,business - Abstract
Background Understanding the breeding patterns of Aedes aegypti in households and the factors associated with infestation are important for implementing vector control. The baseline survey of a cluster randomised controlled trial of community mobilisation for dengue prevention in Mexico and Nicaragua collected information about the containers that are the main breeding sites, identified possible actions to reduce breeding, and examined factors associated with household infestation. This paper describes findings from the Mexican arm of the baseline survey. Methods In 2010 field teams conducted household surveys and entomological inspections in 11,995 households from 90 representative communities in the three coastal regions of Guerrero State, Mexico. We characterized Ae. aegypti breeding sites and examined the effect of two preventive measures: temephos application in water containers, and keeping the containers covered. We examined associations with household infestation, using bivariate and multivariate analysis adjusted for clustering effects. Results We conducted entomological inspections in 11,995 households. Among 45,353 water containers examined, 6.5% (2958/45,353) were positive for larvae and/or pupae. Concrete tanks (pilas) and barrels (tambos) together accounted for 74% of pupal productivity. Both covering water containers and inserting temephos were independently associated with a lower risk of presence of larvae or pupae, with the effect of covering (OR 0.22; 95% CIca 0.15–0.27) stronger than that of temephos (OR 0.66; 95% CIca 0.53–0.84). Having more than four water containers was associated with household infestation in both rural areas (OR 1.42; 95% CIca 1.17–1.72) and urban areas (1.81; 1.47–2.25), as was low education of the household head (rural: 1.27; 1.11–1.46, and urban: 1.39; 1.17–1.66). Additional factors in rural areas were: household head without paid work (1.31; 1.08–1.59); being in the Acapulco region (1.91; 1.06–3.44); and using anti-mosquito products (1.27; 1.09–1.47). In urban areas only, presence of temephos was associated with a lower risk of household infestation (0.44; 0.32–0.60). Conclusion Concrete tanks and barrels accounted for the majority of pupal productivity. Covering water containers could be an effective means of Ae. aegypti vector control, with a bigger effect than using temephos. These findings were useful in planning and implementing the Camino Verde trial intervention in Mexico.
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- 2017
5. [Hepatitis B vaccination coverage and associated factor for vaccine acceptance: a cross-sectional study in health workers of the Acapulco General Hospital, Mexico]
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Leticia, Flores-Sánchez, Sergio, Paredes-Solís, Alejandro, Balanzar-Martínez, Miguel, Flores-Moreno, José, Legorreta-Soberanis, and Neil, Andersson
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Adult ,Male ,Health Personnel ,Vaccination ,Middle Aged ,Hepatitis B ,Hospitals, General ,Occupational Diseases ,Cross-Sectional Studies ,Humans ,Female ,Hepatitis B Vaccines ,Mexico ,Immunization Schedule - Abstract
Vaccination is a key current prophylactic measure for occupational risk of hepatitis B virus (HBV) infection. This study measures HBV vaccination coverage among health personnel in a Mexican hospital, and identifies factors associated with completion of the vaccination schedule.A cross-sectional study in workers of the Acapulco General Hospital, Mexico. Interviews documented vaccination history against HBV, number of doses received, and date of vaccination. Health workers with complete vaccination were considered those with at least three doses of vaccine received at intervals of two months between first and second doses, and six months to a year in the third dose.Some 52% of workers (436/834) reported at least one vaccination during their professional life and only 5.5% (46/834) completed the HBV vaccination schedule. Factors associated with completion were academic degree, perception of infection risk at work, and knowledge of vaccine efficacy and the need for a complete schedule.In line with hospitals in other studies, few hospital workers were fully vaccinated. Evidence from this study can inform efforts to increase HBV vaccination coverage.
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- 2014
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