Evaluation of a novel digital environment for learning medical parasitology.

open access articleEukaryotic parasites represent a serious human health threat requiring health professionals with parasitology skills to counteract this threat. However, recent surveys highlight an erosion of teaching of parasitology in medical and veterinary schools, despite reports of increasing instances of food and water borne parasitic infections. To address this we developed a web-based resource, DMU e-Parasitology®, to facilitate the teaching and learning of parasitology, comprising four sections: theoretical; virtual laboratory; virtual microscopy; virtual clinical case studies. Testing the package was performed using a questionnaire given to ninety-five Pharmacy students in 2017/18 to assess effectiveness of the package as a teaching and learning tool. 89.5% of students reported appropriate acquisition of knowledge of the pathology, prevention and treatment of some parasitic diseases. 82.1% also welcomed the clinical specialism of the package as it helped them to acquire basic diagnostic skills, through learning infective features/morphology of the parasites

Diversity of plant growth-promoting bacteria associated with sugarcane

The sugarcane (Saccharum spp) presents economic importance, mainly for tropical regions, being an important Brazilian commodity. However, this crop is strongly dependent on fertilizers, mainly nitrogen (N). This study assessed the plant growth-promoting bacteria (PGPB) associated with sugarcane that could be used as a potential inoculant to the crop. We evaluated the genetic diversity of PGPB in the plant tissue of sugarcane varieties (RB 867515, RB 1011, and RB 92579). The primer BOX-A1R was used to differentiate the similar isolated and further sequencing 16S rRNA ribosomal gene. The 16S rRNA gene showed the presence of seven different genera distributed into four groups, the genus Bacillus, followed by Paenibacillus (20%), Burkholderia (14%), Herbaspirillum (6%), Pseudomonas (6%), Methylobacterium (6%), and Brevibacillus (3%). The molecular characterization of endophytic isolates from sugarcane revealed a diversity of bacteria colonizing this plant, with a possible biotechnological potential to be used as inoculant and biofertilizers

Natural history and surgical outcomes of Rathke’s cleft cysts: a Spanish multicenter study

Rathke’s cleft cyst; Transsphenoidal surgery; Visual impairmentQuiste de hendidura de Rathke; Hipófisis; Cirugía transesfenoidalQuist de fendedura de Rathke; Hipòfisi; Cirurgia transesfenoïdalRathke’s cleft cysts (RCC) are a common type of lesion found in the sellar or suprasellar area. They are usually monitored clinically, but in some cases, surgery may be required. However, their natural progression is not yet well understood, and the outcomes of surgery are uncertain. The objective of this study is to evaluate the natural history of Rathke’s cleft cysts in patients who are clinically monitored without treatment, and to determine the outcomes of surgery and the incidence of recurrences over time. Design and patients: National multicentric study of patients diagnosed of Rathke’s cleft cyst (RCC- Spain) from 2000 onwards and followed in 15 tertiary centers of Spain. A total of 177 patients diagnosed of RCC followed for 67.3 months (6–215) and 88 patients who underwent surgery, (81 patients underwent immediate surgery after diagnosis and 7 later for subsequent growth) followed for 68.8 months (3–235). Results: The cyst size remained stable or decreased in 73.5% (133) of the patients. Only 44 patients (24.3%) experienced a cyst increase and 9 of them (5.1%) experienced an increase greater than 3 mm. In most of the patients who underwent surgery headaches and visual alterations improved, recurrence was observed in 8 (9.1%) after a median time of 96 months, and no predictors of recurrence were discovered. Conclusions: Rathke’s cleft cysts without initial compressive symptoms have a low probability of growth, so conservative management is recommended. Patients who undergo transsphenoidal surgery experience rapid clinical improvement, and recurrences are infrequent. However, they can occur after a long period of time, although no predictors of recurrence have been identified

An Olive-Derived Extract 20% Rich in Hydroxytyrosol Prevents beta-Amyloid Aggregation and Oxidative Stress, Two Features of Alzheimer Disease, via SKN-1/NRF2 and HSP-16.2 in Caenorhabditis elegans

The authors gratefully acknowledge the funding support of FEDER/Junta de AndaluciaConsejeria de Economia y Conocimiento, Grant B-AGR-193-UGR18. Also grant PID2019-106778RBI00, funded by MCIN/AEI/10.13039/501100011033 FEDER "Una manera de hacer Europa".Olive milling produces olive oil and different by-products, all of them very rich in different bioactive compounds like the phenolic alcohol hydroxytyrosol. The aim of the present study was to investigate the effects of an olive fruit extract 20% rich in hydroxytyrosol on the molecular mechanisms associated with Alzheimer disease features like A beta- and tau- induced toxicity, as well as on oxidative stress in Caenorhabditis elegans. Moreover, characterization of the extracts, regarding the profile and content of phenolics, as well as total antioxidant ability, was investigated. The study of lethality, growth, pharyngeal pumping, and longevity in vivo demonstrated the lack of toxicity of the extract. One hundred mu g/mL of extract treatment revealed prevention of oxidative stress and a delay in A beta-induced paralysis related with a lower presence of A beta aggregates. Indeed, the extract showed the ability to avoid a certain degree of proteotoxicity associated with aggregation of the tau protein. According to RNAi tests, SKN-1/NRF2 transcription factor and the overexpression of HSP-16.2 were mechanistically associated in the observed effects.FEDER/Junta de AndaluciaConsejeria de Economia y Conocimiento B-AGR-193-UGR18 PID2019-106778RBI00 MCIN/AEI/10.13039/50110001103

Microsporidia as a Potential Threat to the Iberian Lynx (Lynx pardinus)

Lynx pardinus is one of the world’s most endangered felines inhabiting the Iberian Peninsula. The present study was performed to identify the presence of microsporidia due to the mortality increase in lynxes. Samples of urine (n = 124), feces (n = 52), and tissues [spleen (n = 13), brain (n = 9), liver (n = 11), and kidney (n = 10)] from 140 lynxes were studied. The determination of microsporidia was evaluated using Weber’s chromotrope stain and Real Time-PCR. Of the lynxes analyzed, stains showed 10.48% and 50% positivity in urine and feces samples, respectively. PCR confirmed that 7.69% and 65.38% belonged to microsporidia species. The imprints of the tissues showed positive results in the spleen (38.46%), brain (22.22%), and liver (27.27%), but negative results in the kidneys. PCR confirmed positive microsporidia results in 61.53%, 55.55%, 45.45%, and 50%, respectively. Seroprevalence against Encephalitozoon cuniculi was also studied in 138 serum samples with a positivity of 55.8%. For the first time, the results presented different species of microsporidia in the urine, feces, and tissue samples of Lynx pardinus. The high titers of anti-E. cuniculi antibodies in lynx sera confirmed the presence of microsporidia in the lynx environment. New studies are needed to establish the impact of microsporidia infection on the survival of the Iberian lynx

Legionella feeleii: Ubiquitous Pathogen in the Environment and Causative Agent of Pneumonia

L. feeleii is one of the most frequent Legionella species isolated from natural pools of the central region of Spain. This study aimed to evaluate its ecology and to identify this Legionella species as a respiratory pathogen. A PCR assay for detecting the L. feeleii mip gene was developed to identify it in clinical and environmental samples. Culture and PCR were performed in environmental samples from four drinking water treatment plants (DWTPs). Free L. feeleii was only detected in raw water samples (3.4%), while L. feeleii as an Acanthamoeba endosymbiont was found in 30.7% of raw water, 11.5% of decanter biofilm, and 32% of finished water samples. Therefore, Acanthamoeba spp. plays an essential role in the multiplication, persistence, and spread of Legionella species in the environment. The first case of Legionnaires' disease caused by L. feeleii in Spain is described in this study. The case was diagnosed in an older woman through PCR and sequencing from urine and sputum samples. A respiratory infection could be linked with health care procedures, and the patient presented several risk factors (age, insulin-dependent diabetes, and heart disease). The detection of non-L. pneumophila, such as L. feeleii, is a factor that must be considered when establishing or reviewing measures for the control and prevention of legionellosis.This work was supported by Instituto de Salud Carlos III (PI12/02725) (PI17/01670) (Co-funded by European Regional Development Fund/European Social Fund “A way to make Europe”/“Investing in your future”); and Fundación Universitaria San Pablo CEU (USPCEU-PC07/2013 and USP-PC07/2014). LV was supported by Universidad San Pablo CEU/Spain (FPI Grants). TG was supported by CAPES/Brazil (BEX 9132/13-9). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.S

The Influence of Acanthamoeba–Legionella Interaction in the Virulence of Two Different Legionella Species

The genus Legionella comprises more than 60 species, and about half are associated with infection. Legionella pneumophila is the most commonly associated with these infections and by far the most studied, but L. non-pneumophila species, such as L. feeleii, L. anisa, etc., may also present clinical importance. Free-living amoebae are their preferred environmental host, where these bacteria not only survive but also succeed in multiplying, and this relationship can lead to an increase in bacterial virulence. The goal of this study was to evaluate the alterations of Legionella pathogenicity due to its interaction with Acanthamoeba. For this, the expression of protein effectors SdhA, LegK2, and SidK were evaluated in L. pneumophila and L. feeleii, before and after infecting Acanthamoeba. Additionally, the host response was evaluated by measuring the production of IL-6, IL-8, and IFN-γ in infected macrophages. Regarding the virulence factors, an increase in SdhA expression was observed after these bacteria infected Acanthamoeba, with a higher increase in the macrophage cultures infected with L. feeleii. Also, an increase in the expression of LegK2 was observed after infecting Acanthamoeba, but it was more intense in the cultures infected with L. pneumophila. With regard to SidK, it was increased in L. feeleii after infecting Acanthamoeba, however the same effect was not observed for L. pneumophila. In cytokine production, the effect on IL-6 and IL-8 was similar for both cytokines, increasing their concentration, but higher production was observed in the cultures infected with L. feeleii, even though it demonstrated slightly lower production with the inoculum obtained from Acanthamoeba. Concerning IFN-γ, induction was observed in both species but higher in the infection by L. pneumophila. Nevertheless, it is not known if this induction is enough to promote an efficient immune response against either L. pneumophila or L. feeleii. Altogether, these alterations seem to increase L. feeleii virulence after infecting Acanthamoeba. However, this increase does not seem to turn L. feeleii as virulent as L. pneumophila. More studies are necessary to understand the aspects influenced in these bacteria by their interaction with Acanthamoeba and, thus, identify targets to be used in future therapeutic approaches

Verificação da Apresentação da Informação Exigida nos Detergentes no Distrito Sanitário Jaen Sur

Specific provisions on labeling, the list of the ingredients and ingredient data sheet of detergents were laid down by Regulation (EC) Nº 648/2004 on detergents and, additionally, by Spanish Royal Decree 770/1999. The aim of this study was to check the level of compliance therewith of 30 detergents assessed between 2010 and 2012. The main deficiencies identified were: an inadequate statement of contents on the label (63 %), an insufficient height of the nominal amount (33 %), the absence of one or more of required legends (20 %) and, in detergents sold to the general public, a lack of information about allergenic fragrances (80 %) or preservatives (83 %). The main difficulties in conducting this study were the scant information of safety data sheets and the resistance of manufacturers to provide additional information. A high level of non-compliance (90 %) in the information systems for detergents used both by the general public and by professionals, with the consequent risk to the health of users.El Reglamento (CE) nº 648/2004 sobre detergentes y, de forma complementaria en España, el Real Decreto 770/1999, que aprueba su reglamentación técnico-sanitaria, establecen obligaciones específicas en cuanto al etiquetado, lista de ingredientes y hoja informativa de ingredientes de estos productos. En el trabajo se revisa su cumplimiento en 30 detergentes evaluados en el período 2010-2012. Las principales deficiencias detectadas fueron: inadecuada declaración de ingredientes en la etiqueta (63 %), insuficiente altura de la cantidad nominal (33 %), ausencia de una o más de las leyendas obligatorias (23 %) y, en los detergentes para uso por el público en general, falta de información sobre fragancias alergénicas (80 %) o conservantes (83 %). La principal dificultad para efectuar este estudio radicó en lo limitado de la información de las fichas de seguridad y la resistencia de los fabricantes a suministrar información adicional. Se evidencia un elevado incumplimiento (90 %) en los sistemas de información de detergentes de uso tanto por el público en general como por profesionales, con el consiguiente riesgo para la salud de los usuarios.O Regulamento (CE) nº 648/2004 relativo aos detergentes e, de forma adicional em Espanha, o Real Decreto 770/1999, que aprovou a regulamentação técnico-sanitária do regulamento europeu, estabelecem obrigações específicas sobre a rotulagem, a lista de componentes e a ficha de informação relativa aos componentes desses produtos. Neste trabalho é verificado o cumprimento destas normas em 30 detergentes avaliados no período 2010-2012. As principais não conformidades identificadas foram: inadequada menção dos componentes na rotulagem (63 %), tamanho insuficiente dos algarismos referentes à quantidade nominal (33 %), ausência de uma ou mais das indicações obrigatórias (23 %) e, nos detergentes para utilização pelo público em geral, a falta de informação sobre as fragrâncias alergénicas (80 %) ou os conservantes (83 %). A principal dificuldade para a realização deste estudo residiu na limitada informação das fichas de dados de segurança e a resistência dos fabricantes em fornecer informações adicionais. Um elevado nível de incumprimento (90 %) é evidenciado nos sistemas de informação dos detergentes vendidos ao público em geral e aos profissionais, com o consequente risco para a saúde dos usuários

Isolation and Characterization of Plant Growth-Promotion Diazotrophic Endophytic Bacteria Associated to Sugarcane (Saccharum officinarum L.) Grown in Paraíba, Brazil

Sugarcane is an important Brazilian commodity, being usually cultivated in soils with low natural fertility. This study aimed to isolate diazotrophic endophytes from sugarcane tissues and evaluate the morphological and physiological characteristics of their colonies as well as their plant growth-promoting (PGP) traits in select diazotrophic endophytic bacteria. Fifty-six bacterial isolates were identified in the sugarcane tissues, and these isolates presented distinct morphological and physiological traits. A total of thirty-five bacterial isolates were biochemically evaluated. Overall, Bacillus was the dominant genus. Isolates of Methylobacterium spp. and Brevibacillus agri were present only in leaves, while Herbaspirillum seropedicae occurred only in stems. Except to IPA-CF45A, all isolates were nitrogenase positive. All endophytes exhibit production of indol 3-acetic acid. Over 50% of endophytes solubilize phosphate, release N-acyl homoserine lactones, and present the activity of 1-aminocyclopropane-1-carboxylic acid deaminase, catalase, lipase and protease. The network analysis showed that isolates belonged to Burkholderia, Herbaspirillum, and Methylobacterium interact with Bacillus. Bacterial endophytes exhibited distinct morphological, physiological, and PGP traits that are useful for sustainable agriculture, highlighting the isolates IPA-CC33, IPA-CF65, IPA-CC9 and IPA-CF27. Further studies on the effects of these diazotrophic endophytes and their potential for providing microbial inoculants for improving sugarcane fields will provide valuable information to maintain the sustainability and environment quality.National Council for Scientific and Technological Development 426655/2018-