Browsing by Author "Ramos, Susana"
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- Functional response and predation rate of Dicyphus cerastii Wagner (Hemiptera: Miridae)Publication . Abraços-Duarte, Gonçalo; Ramos, Susana; Valente, Fernanda; Borges da Silva, Elsa; Figueiredo, ElisabeteDicyphine mirids are important biological control agents (BCAs) in horticultural crops. Dicyphus cerastii Wagner can be found in protected tomato crops in Portugal, and has been observed feeding on several tomato pests. However, the predation capacity of this species is poorly studied. In order to investigate the predation capacity of D. cerastii, and how it is affected by prey size and mobility, we evaluated the functional response (FR) and predation rate of female predators on different densities of four prey species: Myzus persicae 1st instar nymphs (large mobile prey), Bemisia tabaci 4th instar nymphs, Ephestia kuehniella eggs (large immobile prey) and Tuta absoluta eggs (small immobile prey). Experiments were performed on tomato leaflets in Petri dish arenas for 24 h. Dicyphus cerastii exhibited type II FR for all prey tested. The predator effectively preyed upon all prey, consuming an average of 88.8 B. tabaci nymphs, 134.4 E. kuehniella eggs, 37.3 M. persicae nymphs and 172.3 T. absoluta eggs. Differences in the FR parameters, attack rate and handling time, suggested that prey size and mobility affected predation capacity. Considering the very high predation rates found for all prey species, D. cerastii proved to be an interesting candidate BCA for tomato crops
- Handbook of Research on Assertiveness, Clarity, and Positivity in Health LiteracyPublication . Vaz de Almeida, Cristina; Ramos, SusanaHealth literacy in practice requires the development of techniques that ensure that the patient can better access information, understand its content, know how to use this information, and make better health decisions. If the patient makes better health decisions, there are immediate reflexes in health outcomes. The aim is to develop an approach based on the commitment and creation of an atmosphere of trust that reduces uncertainty, anxiety, and embarrassment based on a process of assertive, clear, and positive communication (ACP model). The Handbook of Research on Assertiveness, Clarity, and Positivity in Health Literacy brings the consolidation of knowledge, strategies, and techniques to improve health literacy. This book discusses the importance of making sound health decisions: decisions that can save lives, prevent premature deaths, avoid hospitalizations and abusive resources to medical emergencies, and improve overall health outcomes for the individual, family, community, and society. Covering topics such as dietary guidance, health behavior change models, and medication reconciliation, this resource has theoretical and practical aspects essential to health information libraries, hospitals, clinics, health centers, health schools, patient associations, health professionals, medical students, researchers, professors, and academicians.
- Targeting circulating labile heme as a defense strategy against malariaPublication . Ramos, Susana; Jeney, Viktoria; Figueiredo, Ana; Paixão, Tiago; Sambo, Maria Rosário; Quinhentos, Vatúsia; Martins, Rui; Gouveia, Zélia; Carlos, Ana Rita; Ferreira, Ana; Pais, Teresa F; Lainé, Hugo; Faísca, Pedro; Rebelo, Sofia; Cardoso, Silvia; Tolosano, Emanuela; Penha-Gonçalves, Carlos; Soares, Miguel PSevere presentations of malaria emerge as Plasmodium (P.) spp. parasites invade and lyse red blood cells (RBC), producing extracellular hemoglobin (HB), from which labile heme is released. Here, we tested whether scavenging of extracellular HB and/or labile heme, by haptoglobin (HP) and/or hemopexin (HPX), respectively, counter the pathogenesis of severe presentations of malaria. We found that circulating labile heme is an independent risk factor for cerebral and non-cerebral presentations of severe P. falciparum malaria in children. Labile heme was negatively correlated with circulating HP and HPX, which were, however, not risk factors for severe P. falciparum malaria. Genetic Hp and/or Hpx deletion in mice led to labile heme accumulation in plasma and kidneys, upon Plasmodium infection. This was associated with higher incidence of mortality and acute kidney injury (AKI) in ageing but not adult Plasmodium-infected mice, and was corroborated by an inverse correlation between heme and HPX with serological markers of AKI in P. falciparum malaria. In conclusion, HP and HPX act in an age-dependent manner to prevent the pathogenesis of severe presentation of malaria in mice and presumably in humans.