Psittacine birds have been identified as reservoirs of diarrheagenic Escherichia coli, a subset of pathogens associated with mortality of children in tropical countries. The role of other orders of birds as source of infection is unclear. The aim of this study was to perform the molecular diagnosis of infection with diarrheagenic E. coli in 10 different orders of captive wild birds in the state of São Paulo, Brazil. Fecal samples were analyzed from 516 birds belonging to 10 orders: Accipitriformes, Anseriformes, Columbiformes, Falconiformes, Galliformes, Passeriformes, Pelecaniformes, Piciformes, Psittaciformes and Strigiformes. After isolation, 401 E. coli strains were subjected to multiplex PCR system with amplification of genes eae and bfp (EPEC), stx1 and stx2 for STEC. The results of these tests revealed 23/401 (5.74%) positive strains for eae gene, 16/401 positive strains for the bfp gene (3.99%) and 3/401 positive for stx2 gene (0.75%) distributed among the orders of Psittaciformes, Strigiformes and Columbiformes. None of strains were positive for stx1 gene. These data reveal the infection by STEC, typical and atypical EPEC in captive birds. The frequency of these pathotypes is low and restricted to few orders, but the data suggest the potential public health risk that these birds represent as reservoirs of diarrheagenic E. coli.

No abstract

This work deals with the application of magnetic carbon nanotubes (MCNTs) in the catalytic wet peroxide oxidation (CWPO) of paracetamol (PCM), a pharmaceutical compound selected as model contaminant of emerging concern (CEC). MCNTs were synthetized by catalytic chemical vapor deposition (CCVD) at 850 ºC, considering low-density polyethylene (LDPE), high-density polyethylene (HDPE), and polypropylene (PP) as carbon precursors representative of urban plastic solid waste. Magnetite supported in alumina (Fe3O4@Al2O3) nanoparticles previously synthesized by sol-gel were used as catalysts in the CCVD process. The synthesized MCNTs were tested in the CWPO of PCM at 80 ºC, monitoring during 24 h the concentration of H2O2, PCM, Total Organic Carbon (TOC) and aromatic compounds. All MCNT catalysts show activity allowing to decompose completely the pharmaceutical in aqueous solutions after 360 min. In particular, the MCNTs synthesized from HDPE lead to complete removal of the pollutant after 30 min of reaction. By TOC analysis, it was observed that the CNTs led to obtain mineralization degrees higher than 38% of the pollutant after 24 h. Aromaticity test indicated that the catalyst prepared from HDPE promotes more degradation of the intermediates than the catalyst prepared from LDPE and PP.

Resumo: O conhecimento ornitológico do município de São Paulo vem sendo produzido por naturalistas, pesquisadores e observadores de aves há 200 anos, mas parte destas informações ainda não foi organizada, avaliada e publicada. Apresentamos uma compilação de dados históricos e atuais sobre a avifauna da região do Serviço Social do Comércio (SESC) Interlagos, sudeste do respectivo município. Entre 1964 e 2020, foram registradas 152 espécies, das quais 16 são endêmicas da Mata Atlântica, 13 migratórias e uma ameaçada de extinção. Deste total, 21 foram registradas até a década de 1970 e 143, a partir de 1995, com sete táxons que podem estar extintos localmente devido ao desmatamento. Os dados organizados mostram a importância das coletas científicas, dos projetos feitos por universitários, das plataformas online de observação de aves, das ações de restauração florestal realizadas na unidade e das atividades educativas promovidas nas últimas décadas pelo SESC Interlagos, incluindo ações de observação de aves e sensibilização ambiental. Este esforço amostral faz desta região uma das mais conhecidas ornitologicamente do município de São Paulo, mas a presença de espécies animais e vegetais exóticas, animais domésticos ferais e grande quantidade de lixo na margem da represa Billings são grandes ameaças que precisam ser controladas.