1. Niveis de biosseguranca (NB)Dependendo do grau de risco do patogeno envolvido na atividade laboratorial, e necessario um nivel contencao laboratorial afim de minimizar os riscos na sua manipulacao, desse modo, o laboratorio e classificado em um dos quatro niveis crescentes de Biosseguranca.O NB 1, e o nivel de contencao laboratorial menos rigido que se aplica aos laboratorios de ensino basico. Se aplica tambem naquelas que manuseiam microrganismos que nao provocam doencas no homem.O NB2, se aplica aos laboratorios clinicos, hospitalares ou escolas de niveis primarios de diagnostico. Ou seja, laboratorio que manuseiam tecidos, sangue e outros liquidos corporais. O HIV, a Hepatite B sao exemplos de patogenos designados para esse nivel de contencao.O NB 3, tambem se aplica aos locais especificados no NB 2, mas que lidam com microrganismos de transmissao respiratoria que podem gerar infeccoes fatais. Exemplo: Mycobacterium tuberculosis.O NB 4, ou laboratorio de contencao maxima, destina-se a manipulacao de microrganismos exoticos de alto nivel de contencao, onde ate o momento nao existe vacina ou terapia disponivel.equipamentos de seguranca (barreiras primarias) e instalacoes laboratoriais (barreiras secundarias). Nocoes de praticas laboratoriais adequadas.Referencias BibliograficasBrasil. Biosseguranca em laboratorios biomedicos e de microbiologia. Brasilia, 2004. Research of helminths larvae in the main beaches from Joao Pessoa, Brazil.Research of helminths larvae in the main beaches from Joao Pessoa, Brazil.De Sousa, T.A.1; Almeida, R.N.1; Leite, G.G.F1; Cardoso, H.M.1; Santos, E.P.1; Santos, S.G.21. Faculdade Santa Emilia de Rodat, Brazil.2. Universidade Federal da Paraiba, Brazil.Introduction: The contamination of beaches by helminths eggs is an important public health problem. Being the main cause of contamination the faeces of domestic animals such as dogs and cats. It has been a fact which increases the transmission probability of parasites, mainly by zoonoses such as Visceral migrans larvae caused by Toxocara sp. and the Cutaneous migrans larvae, which are the main etiologic agents Ancylostoma sp. and the Strongiloides stercoralis. Objectives: This study aims to determine the sanitary quality of the main beaches from Joao Pessoa, by searching for helminths larvae in sandy beaches. Methodology: Samples have been collected from the following beaches from Joao Pessoa: Barra de Gramame; Praia do Sol, Penha, Seixas, Cabo Branco; Tambau; Manaira, and Bessa. It has been collected five samples from each beach, so that four have formed a square with 10 m each side, and one in the center of the square, the depth in which the samples have been collected is 10 cm, the samples from the same beach were after mixed and homogenized forming a single sample. The samples have been processed at the Parasitology laboratory, at Santa Emilia de Rodat College (FASER) and have been analyzed through the Rugai method. Results: In nine samples have been found 11 larvae of S. Stercoralis, it has not been found larvae of hookworms. There were no findings on the beaches: Barra de Gramame; Praia do Sol, and Seixas. From the larvae which have been found, 36.3% from Manaira, 27.3% from Penha, 18.2% from Cabo Branco, Tambau and Bessa had the same percentage 9.1%. Conclusions: It has been concluded that it is necessary preventive measures to avoid