Identification of a Novel Secreted Metabolite Cyclo(Phenylalanyl-Prolyl) from Batrachochytrium Dendrobatidis and its effect on Galleria Mellonella.

The fungus, Batrachochytrium dendrobatidis, is the causative agent of chytridiomycosis and a leading cause of global decline in amphibian populations . The first stages of chytridiomycosis include: inflammation, hyperkeratosis, lethargy, loss of righting reflex, and disruption of internal electrolyte levels leading to eventual death of the host. Previous work indicates that B. dendrobatidis can produce immunomodulatory compounds and other secreted molecules that regulate the growth of the fungus. In this study, filtrates of the fungus grown in media and water were subjected to ultra performance liquid chromatography-mass spectrometry and analyzed using Compound Discoverer 3.0. Identification of cyclo(phenylalanyl-prolyl), chitobiose, and S-adenosylmethionine were verified by their retention times and fragmentation patterns from B. dendrobatidis supernatants. Previous studies have analyzed the effects of B. dendrobatidis on amphibian models, in vitro, or in cell culture. We studied the effects of live B. dendrobatidis cells, spent culture filtrates containing secreted metabolites, and cyclo(pheylalanyl-prolyl) on wax moth larvae ( Galleria mellonella) . Concentrated filtrates caused melanization within 24 hours, while live B. dendrobatidis caused melanization within 48 hours. Our results indicate B. dendrobatidis produces secreted metabolites previously unreported. These findings provide another alternative for the use of a non-amphibian model system to study pathogenicity traits in this fungus.

Therapy for Pulmonary Arterial Hypertension: Glance on Nitric Oxide Pathway

Pulmonary arterial hypertension (PAH) is a severe disease with a resultant increase of the mean pulmonary arterial pressure, right ventricular hypertrophy and eventual death. Research in recent years has produced various therapeutic options for its clinical management but the high mortality even under treatment remains a big challenge attributed to the complex pathophysiology. Studies from clinical and non-clinical experiments have revealed that the nitric oxide (NO) pathway is one of the key pathways underlying the pathophysiology of PAH. Many of the essential drugs used in the management of PAH act on this pathway highlighting its significant role in PAH. Meanwhile, several novel compounds targeting on NO pathway exhibits great potential to become future therapy medications. Furthermore, the NO pathway is found to interact with other crucial pathways. Understanding such interactions could be helpful in the discovery of new drug that provide better clinical outcomes.

Lesser Sac Haematoma – Meliodosis: A Surgical Surprise

ABSTRACT Meliodosis, a potentially fatal disease endemic in south east asia and northern Australia is caused by Burkholderia pseudomallei, a motile ,aerobic , non spore forming gram negative bacillus. It can present with asymptomatic infections to localized abscesses to fulminating diseases with multi organ involvement and eventual death. Mycotic aneurysm is a very rare presentation of meliodosis. Although isolation of

Toxicity of glyphosate-based isopropylamine salt and polyethoxylated tallow amine formulations on juvenile Clarias gariepinus

The formulation of glyphosate composed of Isopropylamine salt and Polyethoxylated tallow Amine (Clearweed) is widely used as herbicide to control weeds both in the terrestrial and aquatic environments. A static bioassay was conducted to examine toxicity of this formulation on juvenile African catfish (Clarias gariepinus). Catfish juvenile (mean weight 27.97±0.03g) were exposed to glyphosate at concentrations of 0.00mg/l (control), 5.00, 7.50, 10.00, 12.50 and 15.00mg/l. Each concentration was treated in triplicate and the exposure period lasted for 96 hrs. Mortality rates and physico-chemical parameters of water were monitored. Results revealed that fish mortality increased with increasing concentration of glyphosate and time of exposure. The median lethal concentration (96-hr LC50) value was 8.88mg/l with the upper and lower limits of 9.10mg/l and 7.75mg/l respectively. Behavioural changes observed the treated fish included: erratic swimming, jerky movement, increased opercula and tail movements, gulping of air, lost of balance and consciousness, cessation of opercula and tail movement signifying eventual death. Water quality parameters increased significantly (p<0.05) with extract concentration except dissolve oxygen levels which reduced (p<0.05). However, all values reported were within the permissible limits of the Federal Ministry of Environment (FMEnv) for water samples. The results of this study indicated that glyphosate formulation has toxic effects on catfish. Thus, the herbicide should be cautiously used to avoid ecotoxicological hazards particularly on non-target organisms.

Managing Thrombosis and Hemorrhage in a Man with Myocardial Infarction and Traumatic Hemopericardium with Cardiac Tamponade

A 79-year-old man had an out-of-hospital acute ST-segment-elevation myocardial infarction with cardiac arrest. Cardiopulmonary resuscitation performed by a bystander resulted in traumatic hemopericardium. We discuss the patient's case, highlight the challenges of managing simultaneously life-threatening thrombosis and hemorrhage, and present our conclusions regarding the patient's eventual death.

Neutron Kinetics and Reactor Control

A nuclear reactor is designed to achieve the very delicate balance between neutron “production” (release) in fission reactions and neutron loss by absorption and leakage. A given neutron will be “born” in a fission event and will then usually scatter about the reactor until it meets its eventual “death” either by being absorbed in some material or by leaking out of the reactor. A certain number of these neutrons will be absorbed by fissionable nuclei and induce further fissions, thereby leading to the birth of new fission neutrons, that is, to a new generation of neutrons. The ratio of the number of neutrons born in a fission-neutron generation to the number born in the previous generation is called the effective reactor multiplication factor, keff. The keff characterizes the balance or imbalance in the chain reaction. Alternatively, keff can be defined by the ratio of production rate to loss rate of neutrons in the reactor. These definitions are given below:

Exorbitant Dust

This article traces the figure of polvo (dust) across the writing career of Puerto Rican and New York writer Manuel Ramos Otero. Polvo heralds the macabre sensuality of his early short stories, long before his diagnosis with HIV, and persists and morphs through his later essays and poetry up until his eventual death in 1990 from AIDS complications. Writing defiantly as a queer, a feminist, a Puerto Rican, and a sidoso, he produced work that invites death and desire to commingle through a figuration of dust, as a scattered substance that covers skin, coats translation, and dirties conventional genres. Polvo illuminates the dimensions and risks of relation as a particulate matter that exposes our porosity—clinging and hovering in the space between bodies, between the past and the future, between life and death. As the dust settles in the wake of Hurricane María, so too can polvo be read as prescient for how coloniality lingers as enduring conditions of debility and precarity. Ramos Otero's affinity for finitude, figured through polvo, counterintuitively conjures a relational desire that privileges the porous, the marginal, and the always precarious possibility of survival. Polvo moves across the different genres and phases of Ramos Otero's work as a matter that refuses to disentangle the material realities of queerness and coloniality.

Histological Examination of Focused Ultrasound Effects on Human Brain Tissue

The study investigated the effects of focused ultrasound on human brain tissue to assess intensities at which focused ultrasound might cause irreversible structural cell damage. FUS does not appear to cause significant heating or cavitation to brain tissue when Ispta remains below 25 W/cm2. However, as the tissue was fixed immediately post-sonication, there was not sufficient time for apoptosis to develop, leaving open the possibility that a lower intensity over a longer period of time may cause stress and damage to the cell, leading to its eventual death. While additional studies should continue to further ensure the safety of this novel and important technology, this furthers the notion that, at the current FDA-approved levels, and potentially beyond, tFUS is likely a safe clinical technology.

Pathological diagnosis of cirrhotic ascites in a Caucasian Dog

Although ascites is widely reported in dogs, those of cirrhotic ascites are scanty, especially in Abuja, Nigeria, hence the need for this report on cirrhotic ascites in a 2-year-old Caucasian dog. The reported complaints of anorexia, weakness, and distended abdomen before the presentation for proper veterinary attention led to a tentative diagnosis of suspected liver-induced ascites. The dog later died while receiving treatment necessitating the performance of a post-mortem examination on the severely emaciated carcass, which had pale mucous membranes, distended abdomen, and slightly oedematous distal limbs. Grossly, the lungs had multiple areas of congestion with visible hydrothorax and hydroperitoneum while the liver was shrunken, firm, nodular, misshapen, and haemorrhagic. Pulmonary congestion and oedema characterized the lung microscopically. The liver showed hepatic haemorrhage, cytoplasmic vacuolation, and necrosis with mononuclear cellular infiltration, fibrous connective tissue proliferation, and nests of apparently normal hepatocytes. The positive alpha-smooth muscle actin and vimentin immunoreactivity confirmed the hepatic fibrosis. Microscopic renal lesions indicated nephropathy. Consequently, the definitive diagnosis became cirrhotic ascites. The observed liver pathology indicated end-stage liver damage responsible for the ascites and eventual death of the dog. Prompt diagnosis with appropriate treatment is very crucial in the prognosis of cirrhotic ascites in affected dogs.

Six Steps to Managing Alzheimer's Disease and Dementia

Six Steps to Managing Alzheimer’s Disease and Dementia: A Guide for Families explains everything that a family member or other caregiver needs to care for their loved one with Alzheimer’s disease or another dementia, all the way from the mild stage through death—and beyond. It begins by explaining Alzheimer’s and dementia, and how to manage problems with memory, language, vision, emotion, behavior, sleep, and bodily functions. Next discussed are which medications help—and which make things worse. Caring for yourself and building a care team are then covered, as well as how to sustain your relationship. Final chapters discuss the progression of dementia, the eventual death, and how to plan for life afterward. It is written in an easy-to-read style, featuring clinical vignettes and character-based stories that provide real-life examples of how to successfully manage Alzheimer’s disease and dementia.