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Riparian vegetation along streams in the Atlantic Forest in Brazil contributes to the formation of a highly heterogeneous leaf litter in streambeds. To investigate the structure and composition of the aquatic invertebrate community during the process of leaf decomposition of two plant species present along the banks of the stream studied, 21 plastic mesh(More)
OBJECTIVES To study the prevalence and time of tuberculosis (TB) treatment default among children and to compare defaulters with those who completed treatment. METHODS Retrospective cohort study at the Hospital Municipal Jesus, Rio de Janeiro, Brazil, among TB patients aged <15 years followed from 1998 to 2002. The group that completed treatment was(More)
The aim of this study was to evaluate the presence of Chaetogaster limnaei K. von Baer, 1927 in four species of mollusks collected in irrigation channels of a horticultural garden in the city of Juiz de Fora, Minas Gerais State, Southeastern Brazil. The collections were made from June 2005 to January 2006. Of the four species of mollusks analysed, we could(More)
Studies on mesohabitat scale have been used to shed light on the ecology and distribution of chironomid larvae in small streams. Thus, the objective of the present study was to examine the diversity and distribution of the Chironomidae assemblage on the mesohabitat scale in three streams located in different preserved areas of southeastern Brazil. In each(More)
This study describes the structure of the Chironomidae community associated with bryophytes in a first-order stream located in a biological reserve of the Atlantic Forest, during two seasons. Samples of bryophytes adhered to rocks along a 100-m stretch of the stream were removed with a metal blade, and 200-mL pots were filled with the samples. The numerical(More)
There are few studies in tropical regions exploring the use of leaf breakdown process as a functional tool to assess anthropic disturbance on aquatic ecosystems. We assessed the effects of water pollution due to human activities on the leaf breakdown rate of Picramnia sellowii in streams of the southeastern Brazil. The experiment was carried out for 60 days(More)
E A descoberta de uma vacina eficaz na prevençao da hepatite B veio permitir uma reduçao Importante da morbilidade e mortalidade atribuíveis a esta doença infecciosa. No entanto, 2 a 10 o dos adultos saudáveis não respondem à vacinação com produção de anticorpo anti-HBs em títulos considerados protectores (admitindo-se como protectores, doseamentos do ac.(More)