Pathoecology studies the environmental and cultural factors that contribute to the maintenance of infections or diseases in populations. Concerning parasites, it requires the evaluation of these factors based on the presence and life cycle of these organisms. For this reason, it is possible to apply this concept in the context of ancient populations in order to understand the parasite-host dynamic or even the health consequences faced by the members of the populations.
View Article and Find Full Text PDFPreweanling rats are highly sensitive to the locomotor stimulation induced by relatively high ethanol doses. In adult mice this ethanol effect is modulated by stress. The goal of the present study was to analyze the role of stress and corticosterone in the stimulating effect of ethanol in preweanling rats.
View Article and Find Full Text PDFStudy Objectives: To estimate the prevalence of symptoms of insomnia among adolescents living along the United States-Mexico border and to examine whether ethnicity and birthplace affect risk for such symptoms.
Design: Cross-sectional school-based survey using a version of the 2001 Youth Risk Behavior Survey, modified to elicit data on sleep problems.
Setting: A probability sample of 13 high schools selected from more than 40 high schools in the 4 southernmost counties in Texas-the Lower Rio Grande Valley-contiguous with Mexico.
The p53 gene plays an important role in cell cycle control in response to DNA damage, which may increase the probability of mutations that lead to carcinogenesis. The p53 codon 72 Arg right curved arrow Pro polymorphism has been suggested to be associated with risk for different kind of cancers, but the data on gastric cancer (GC) is very limited. To evaluate the association between this polymorphism and risk of GC, we performed genotype analysis by using a polymerase chain reaction-based restriction fragment length polymorphism assay in a population-based case-control study of 324 GC patients and 317 cancer-free controls in a Chinese population.
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