Pesca em águas interiores na ilha de S. Miguel (Açores)

XII congresso da Associação Espanhola de Limnologia/IV Congresso Ibérico de Limnologia, organizado pela Associação Espanhola de Limnologia, de 5 a 9 de Julho de 2004 no Porto, Portugal.A ilha de S. Miguel é dotada de lagoas e ribeiras abundantes em espécies piscícolas que levaram ao desenvolvimento da pesca desportiva. Todas as espécies existentes nas lagoas foram introduzidas por acção humana

A Highly Pathogenic Strain of Staphylococcus sciuri Caused Fatal Exudative Epidermitis in Piglets

Staphylococcus sciuri are important human pathogens responsible for endocarditis, peritonitis, septic shock, urinary tract infection, pelvic inflammatory disease and wound infections. However, little information is known regarding the pathogenicity of S. sciuri to animals. From the pericardial fluid of a diseased piglet with exudative epidermitis (EE), we isolated a strain of Staphylococcus in pure culture. Surprisingly, this isolate was a member of S. sciuri rather than S. hyicus as identified by its biochemical traits and also by analysis of 23S ribosomal DNA using Internal Transcribed Spacer PCR. In addition, inoculation of newborn piglets with 1×10(10) CFU of the isolate by oral feeding or intra-muscular injection successfully reproduced EE in piglets, which suggested that the oral intake of the pathogen by the animals is one of the major routes of exposure. These unexpected findings prioritized S. sciuri as important zoonotic agents, which may have ramifications for human medicine

Identificação de QTLs ligados a resistência ao crestamento bacteriano em Phaseolus vulgaris.

O objetivo deste trabalho foi identificar QTLs associados à resistência do feijoeiro ao crestamento bacteriano comum, a fim de auxiliar a seleção com marcadores

Lagoas de São Miguel (Açores): caracterização, problemas e soluções

XII congresso da Associação Espanhola de Limnologia/IV Congresso Ibérico de Limnologia, organizado pela Associação Espanhola de Limnologia, de 5 a 9 de Julho de 2004 no Porto, Portugal.A ilha de São Miguel é a maior ilha do arquipélago dos Açores, com aproximadamente 747 km2 de superfície. Nesta ilha existem mais de 30 lagoas e lagoeiros (Constância et al., 1997). Os maiores ecossistemas lacustres da ilha são as lagoas do Fogo, das Sete Cidades e das Furnas. Nestas duas últimas lagoas existe um problema de eutrofização das massas de água resultante das actividades antropogénicas desenvolvidas nas bacias hidrográficas, em especial as explorações agro-pecuárias, o qual constitui um dos problemas mais graves de degradação da qualidade bio-físico-química da água. Uma das consequências do aumento de nutrientes é a proliferação da biomassa de fitoplâncton

Charge control in InP/GaInP single quantum dots embedded in Schottky diodes

We demonstrate control by applied electric field of the charge states in single self-assembled InP quantum dots placed in GaInP Schottky structures grown by metalorganic vapor phase epitaxy. This has been enabled by growth optimization leading to suppression of formation of large dots uncontrollably accumulating charge. Using bias- and polarization-dependent micro-photoluminescence, we identify the exciton multi-particle states and carry out a systematic study of the neutral exciton state dipole moment and polarizability. This analysis allows for the characterization of the exciton wavefunction properties at the single dot level for this type of quantum dots. Photocurrent measurements allow further characterization of exciton properties by electrical means, opening new possibilities for resonant excitation studies for such system.Comment: 7 pages, 4 figure

Epidemiology and clinical presentation of community-acquired Staphylococcus aureus bacteraemia in children under 5 years of age admitted to the Manhica District Hospital, Mozambique, 2001-2019

Staphylococcus aureus bacteraemia (SAB) is one of the most common bloodstream infections globally. Data on the burden and epidemiology of community-acquired SAB in low-income countries are scarce but needed to defne preventive and management strategies. Blood samples were collected from children<5 years of age with fever or severe disease admitted to the Manhiça District Hospital for bacterial isolation, including S. aureus. Between 2001 and 2019, 7.6% (3,197/41,891) of children had bacteraemia, of which 12.3% corresponded to SAB. The overall incidence of SAB was 56.1 episodes/100,000 children-years at risk (CYAR), being highest among neonates (589.8 episodes/100,000 CYAR). SAB declined signifcantly between 2001 and 2019 (322.1 to 12.5 episodes/100,000 CYAR). In-hospital mortality by SAB was 9.3% (31/332), and signifcantly associated with infections by multidrugresistant (MDR) strains (14.7%, 11/75 vs. 6.9%, 14/204 among non-MDR, p=0.043) and methicillin-resistant S. aureus (33.3%, 5/15 vs. 7.6%, 20/264 among methicillin-susceptible S. aureus, p=0.006). Despite the declining rates of SAB, this disease remains an important cause of death among children admitted to MDH, possibly in relation to the resistance to the frst line of empirical treatment in use in our setting, suggesting an urgent need to review current policy recommendationspublishersversionpublishe

Curraleiro Pé Duro cattle breed (Bos taurus) differ in phagocytic Neutrophil function related to crossbreed cattle (Bos taurus X Bos indicus).

This work aimed to evaluate hematological parameters and phagocytic neutrophil functions of naturally selected Curraleiro Pé Duro cattle breed (Bos taurus) and crossbreed cattle (Bos taurus X Bos indicus). Two groups of adult cows: Natural= Curraleiro Pé Duro cattle breed (n=10) and Selected = ¾ Nelore X Simental crossbreed animals (n=10) were evaluated. Blood was sampled to make hemogram, in vitro evaluation of neutrophil phagocytosis and basal Nitroblue Tetrazolium - NBT reduction (without any stimulus). The results showed no difference in hematological parameters between these groups. Natural group had greater phagocytic index of neutrophils through pathogen-associated molecular patterns receptors (PAMPs) while in Selected group this same index was greater using opsonin receptors. The reduction of NBT was lower for Natural group than Selected group. In conclusion, we suggest that both animal groups showed differences in neutrophil phagocytic functions in relation to pathway activation and Curraleiro Pé Duro cattle breed produced more oxygen radicals (superoxide, O2-) than the other tested group