|902-1||Microbiological quality of seawater on the beach of Piaui-Brazil - 2010-2011|
|Autores:||Erik Vinicius de Sousa Reis (UFPI - Universidade Federal do Piauí) ; Luzeni Garcez Souza (UFPI - Universidade Federal do Piauí) ; Sabrynna Brito Oliveira (UFPI - Universidade Federal do Piauí) ; Gustavo Portela Ferreira (UFPI - Universidade Federal do Piauí) ; Anna Carolina Toledo da Cunha Pereira (UFPI - Universidade Federal do Piauí) |
Water is a resource essential to life. In contrast, water is also an important vehicle for the transmission of a variety of diseases. Marine waters have been used for a variety of recreational purposes in different cultures. Doing physical activities or simply relaxing in marine waters promote great well-being. It is estimated that worldwide, local and foreign tourists spend 2 billion/day in coastal recreational environments. Moreover, in recent years, several epidemiological studies have pointed the relationship between bathing in marine waters and the occurrence of infectious diseases such as gastroenteritis, conjutivitis, skin-, ear- and respiratory infections. In Brazil, several states conduct monitoring of the quality of bathing beaches monthly or weekly. In Northeastern Brazil, Piauí is does not monitor the quality condition of its beaches. This study evaluated, during one year, the microbiological quality of waters of the most visited beach in the state, Coqueiro in the town of Luís Correia – Piauí. Therefore, two points were determined on beach. Twenty-four samples were collected from November 2010 to October 2011 on random days, early in the morning. Water samples were collected in sterile flasks and kept on ice until laboratory analysis was carried out within 24-hours. The quantification of total and fecal coliform bacteria was made by the standard most probable number (MPN) method according to Clesceri et al. (2005). The Brazilian legislation by CONAMA classifies as excellent, recreational swimming waters presenting a maximum of 250 fecal coliforms/100 mL in 80% or more of the samples harvested at the same location, once a week, during the five previous weeks. However, this study was carried out in a monitoring period of 12 months. Although the samples were collected monthly, according to the Brazilian parameters, data of this study indicate that the beach analyzed are classified as excellent for bathing, since 87,5% of the samples presented values below the maximum value recommended. The coast of Piauí has minimum temperatures of 25°C and maximum of 37°C, with hot tropical climate, presenting high UV index during most part of the year and Coqueiro, like the other beaches in Piauí, are not urbanized and with only few buildings. These environmental characteristics may contribute to the low counts of coliforms in all months of the year.
Financial suport: FAPEPI/CNPq/UFPI
Palavras-chave: water quality, coliforms, Piauí, Coqueiro beach