Contaminación microbiana en las líneas de agua de las unidades odontológicas

Introduction and Objective: Microorganisms are responsible for multiple infections and pathologies; this is why it is important to control microbes that can be found in the triple syringe used for irrigation in different dental procedures. The aim of this study was to identify cultivable species of microbes (fungus and bacteria) found in some dental units water lines of a private dental clinic from Medellín, Colombia. Materials and Methods: Random samples were taken from 11 chairs from a total of 89; a sample of water of 500ml was collected from the triple syringe of each selected chair. The study aim to search for the presence of total coliforms, filamentous fungi and leavened Results: the average presence of microorganisms was between 40CFU and more of 200 CFU. Microorganisms such as Aeromona salmonicida, Actinobacilus sp and Pseudomona maltophil were isolated. No total coliforms neither fecal coliforms were found. Conclusions: the high levels of contamination suggest that there is a mature biofilm in somewhere of the dental unit water line, but the absence of total and fecalis coliforms suggest that the water had been treated.

Saliva contamination by opportunistic microorganisms in drug addiction females

In recent decades there has been a significant increase in the consumption of legal and illegal drugs, and most of such compounds are able to induce dependence and this increase was observed mainly in females. This drug addiction increases susceptibility to several infectious agents, especially opportunistic microorganisms. The objective of this study was to evaluate the occurrence of opportunistic bacteria and yeasts in the mouth of drug addiction patients and non-addicted patients with different periodontal conditions. The study included 50 addiction patients and 200 non-addiction subjects. Intra and extraoral clinical examinations were performed and saliva samples were transferred to saline solution and the presence of members of the family Enterobacteriaceae, genera Enterococcus and Pseudomonas, as well fungi of the genus Candida was evaluated by culture. Samples were cultivated onto selective and non-selective media under aerobic conditions, at 37oC, for 24 -48 h. Identification of selected microorganisms were carried out through biochemical tests. Chi-square test was used to evaluate the data when three or more categories were involved. Higher detection frequencies of Candida species, family Enterobacteriaceae, E. faecalis, Pseudomonas sp. and P. aeruginosa in addiction patients were verified. It was found that patients addicted to both genders showed a higher occurrence of members of the Enterobacteriaceae, which were also associated with bone loss only in patients with drug addiction.

Produção da cultura da beterraba irrigada com água salina.,

The use of low quality water for agriculture should be performed with care to avoiding excessive accumulation of salts in the soil so not to harm crop development. In order to evaluate the performance of beets under the infl uence of low water quality, an experiment was conducted in a greenhouse of the Department of Agricultural Engineering, Universidade Estadual Paulista in Botucatu, Brazil, from April to July 2012. We used the beet (Beta vulgaris L.) in a completely randomized design with 6 treatments and 5 replications, totaling 30 plots. Treatments consisted of NaCl solutions at different concentrations (2.0, 3.0, 4.0, 5.0 and 6.0 dS m-1) plus a control treatment corresponding to water with no additional salt and electrical conductivity of roughly 0.26 dS m-1. Variables evaluated were total production, commercial production, plant height, number of plants and root diameter. Production of the beet crop was affected by the increasing salinity of irrigation water, characterized by reduced root production of the beets. Total and commercial production showed reductions of 8.82 and 12.2% in accordance with the unit increase of salinity.

Fisiologia e bioquímica do tomateiro submetido à irrigação salina parcial do sistema radicular

Pós-graduação em Agronomia (Produção Vegetal) - FCAV

Introducción a la contaminación biológica

Máster en Medio Ambiente Litoral y Marino

Teoría de contaminación biológica

Facultad de Ciencias del Mar, Departamento de Biología

Relaciones entre biomasa, tasa de crecimiento, respiración y respiración potencial en el crustáceo "Artemia salina"

Programa de Doctorado en Oceanografía