Bat flies aggregation on Artibeus planirostris hosts in the Pantanal floodplain and surrounding plateaus.

For parasites in natural systems, the most common pattern of spatial distribution is aggregation among hosts. The main causes of such aggregation are variable exposure of hosts to parasites and heterogeneity in host susceptibility. The objective of this study was to determine if there are differences in the aggregation pattern of two species of ectoparasitic flies between the Pantanal and Cerrado regions of Brazil on the bat Artibeus planirostris. We collected the ectoparasites from bats captured between 2002 and 2017 with mist nets in 21 sites in the Pantanal and 15 sites in the surrounding plateaus. The results showed that the aggregation of ectoparasitic flies in Pantanal was more pronounced than in Cerrado. The discrepancy aggregation index (D) of the bat fly Megistopoda aranea was 0.877 in Pantanal and 0.724 in Cerrado. The D values of Aspidoptera phyllostomatis was even higher, with 0.916 and 0.848 in the Pantanal and Cerrado, respectively. Differences in the shelters used may be the main factor shaping variation in aggregation, since the Pantanal does not have rock formations, with only foliage, crowns and hollow tree trunks. These differences likely affect host exposure to the parasites, leading to an increase in parasite aggregation.

School academic climate and oral health (tooth loss) in adolescents.

BACKGROUND: Preventing tooth loss depends on oral health maintenance behaviors. This study hypothesized that adolescents with educational aspirations have greater motivation to invest in the future, including maintenance of oral health status. AIM: To analyze the association between a school academic climate of educational aspirations and tooth loss (first permanent molars) among adolescents. METHODS: A cross-sectional study was designed to include 2,500 adolescents (aged 14-19 years) enrolled in public high schools of Olinda located in Northeast Brazil. Multilevel Poisson regression random intercept models were conducted with tooth loss (first permanent molars) as the outcome. The primary cohort of interest was school academic climate, as measured by the proportion of students taking the national high school exams. RESULTS: Tooth loss of the first permanent molars (assessed by clinical exam) was more prevalent in adolescents from more disadvantaged backgrounds (receiving family allowance, low maternal education). However, after controlling for a wide range of individual characteristics, adolescents enrolled in schools with lower academic climate had a higher prevalence of tooth loss (PR 1.42, 95%CI: 1.09,1.85). CONCLUSION: The school academic climate is associated with tooth loss, suggesting that educational aspirations are linked to adolescent oral health maintenance behaviors.

[Alcohol consumption and physical violence among adolescents: which is the predictor?] / Consumo de álcool e violência física entre adolescentes: quem é o preditor?

The scope of this integrative review was to investigate the association between alcohol consumption and physical violence in the literature, with an emphasis on identifying the predictor between them. A search was conducted in the Lilacs, Medline and SciELO databases, adopting "violence," "alcohool drinking" and "adolescent" as descriptors. It included articles published between 2005 and 2014 that analyzed the association between alcohol consumption and physical violence using multivariate analysis. Of the total of 1667 articles located, 29 met the inclusion criteria. Alcohol consumption was investigated more as a predictor of involvement in physical violence when the teenager is the perpetrator or the victim of violence, with a significant association found in 19 studies. However, when victimization was investigated as a predictor (7 studies), most of these (6) revealed no significant association with the intake of alcoholic beverages. The consumption of alcohol has proven to be the predictor of physical violence for both the teen perpetrator and for the adolescent victim of violence. However, having been the victim of violence in childhood and adolescence may also lead adolescents to alcohol consumption.

O objetivo desta revisão integrativa foi investigar na literatura a associação entre consumo de bebidas alcoólicas e violência física, com ênfase em identificar o preditor entre eles. Foram realizadas buscas nas bases de dados Lilacs, Medline e SciELO, adotando como descritores: "violence", "alcohool drinking" e "adolescent". Foram incluídos artigos publicados entre 2005 e 2014, e que analisassem a associação entre o consumo de álcool e a violência física, usando análise multivariada. Do total de 1667 artigos, 29 se enquadravam nos critérios de inclusão. O consumo de álcool foi a variável mais investigada como preditora do envolvimento em violência física, quando o adolescente é o perpetrador ou a vítima da violência, com associação significativa em 19 estudos. No entanto, quando a vitimização foi investigada como preditora (7 estudos), na maioria destes (6) houve associação significativa com a ingestão de bebidas alcoólicas. O consumo de bebida alcoólica se mostrou preditor da violência física, tanto para o adolescente perpetrador quanto para aquele vítima da violência. Entretanto, ter sido vítima de violência na infância e na adolescência também pode levar o adolescente ao consumo do álcool.

Consumo de álcool e violência física entre adolescentes: quem é o preditor? / Alcohol consumption and physical violence among adolescents: which is the predictor?

Resumo O objetivo desta revisão integrativa foi investigar na literatura a associação entre consumo de bebidas alcoólicas e violência física, com ênfase em identificar o preditor entre eles. Foram realizadas buscas nas bases de dados Lilacs, Medline e SciELO, adotando como descritores: "violence", "alcohool drinking" e "adolescent". Foram incluídos artigos publicados entre 2005 e 2014, e que analisassem a associação entre o consumo de álcool e a violência física, usando análise multivariada. Do total de 1667 artigos, 29 se enquadravam nos critérios de inclusão. O consumo de álcool foi a variável mais investigada como preditora do envolvimento em violência física, quando o adolescente é o perpetrador ou a vítima da violência, com associação significativa em 19 estudos. No entanto, quando a vitimização foi investigada como preditora (7 estudos), na maioria destes (6) houve associação significativa com a ingestão de bebidas alcoólicas. O consumo de bebida alcoólica se mostrou preditor da violência física, tanto para o adolescente perpetrador quanto para aquele vítima da violência. Entretanto, ter sido vítima de violência na infância e na adolescência também pode levar o adolescente ao consumo do álcool.

Abstract The scope of this integrative review was to investigate the association between alcohol consumption and physical violence in the literature, with an emphasis on identifying the predictor between them. A search was conducted in the Lilacs, Medline and SciELO databases, adopting "violence," "alcohool drinking" and "adolescent" as descriptors. It included articles published between 2005 and 2014 that analyzed the association between alcohol consumption and physical violence using multivariate analysis. Of the total of 1667 articles located, 29 met the inclusion criteria. Alcohol consumption was investigated more as a predictor of involvement in physical violence when the teenager is the perpetrator or the victim of violence, with a significant association found in 19 studies. However, when victimization was investigated as a predictor (7 studies), most of these (6) revealed no significant association with the intake of alcoholic beverages. The consumption of alcohol has proven to be the predictor of physical violence for both the teen perpetrator and for the adolescent victim of violence. However, having been the victim of violence in childhood and adolescence may also lead adolescents to alcohol consumption.