scholarly journals Host restriction, pathogenesis and chronic carriage of typhoidal Salmonella

2021 ◽  
Author(s):  
Amber J. Barton ◽  
Jennifer Hill ◽  
Christoph J. Blohmke ◽  
Andrew J. Pollard
Keyword(s):  
Innate Immunity ◽  
Enteric Fever ◽  
World Health ◽  
Conjugate Vaccines ◽  
Host Restriction ◽  
The Past ◽  
The World ◽  
Chronic Carriage ◽  
Health Organization

ABSTRACT While conjugate vaccines against typhoid fever have recently been recommended by the World Health Organization for deployment, the lack of a vaccine against paratyphoid, multidrug resistance and chronic carriage all present challenges for the elimination of enteric fever. In the past decade, the development of in vitro and human challenge models has resulted in major advances in our understanding of enteric fever pathogenesis. In this review, we summarise these advances, outlining mechanisms of host restriction, intestinal invasion, interactions with innate immunity and chronic carriage, and discuss how this knowledge may progress future vaccines and antimicrobials.

Natural products from the traditional Moroccan pharmacopoeia: A potential lead for the prevention and treatment of COVID-19

2020 ◽  
Vol 11 (SPL1) ◽  
pp. 1278-1285
Author(s):  
Mohamed Yafout ◽  
Amine Ousaid ◽  
Ibrahim Sbai El Otmani ◽  
Youssef Khayati ◽  
Amal Ait Haj Said
Keyword(s):  
Medicinal Plants ◽  
Plant Extracts ◽  
Molecular Mechanisms ◽  
Scientific Literature ◽  
Treatment Protocol ◽  
World Health ◽  
The World ◽  
Health Organization ◽  
Promising Source

The new SARS-CoV-2 belonging to the coronaviruses family has caused a pandemic affecting millions of people around the world. This pandemic has been declared by the World Health Organization as an international public health emergency. Although several clinical trials involving a large number of drugs are currently underway, no treatment protocol for COVID-19 has been officially approved so far. Here we demonstrate through a search in the scientific literature that the traditional Moroccan pharmacopoeia, which includes more than 500 medicinal plants, is a fascinating and promising source for the research of natural molecules active against SARS-CoV-2. Multiple in-silico and in-vitro studies showed that some of the medicinal plants used by Moroccans for centuries possess inhibitory activity against SARS-CoV or SARS-CoV-2. These inhibitory activities are achieved through the different molecular mechanisms of virus penetration and replication, or indirectly through stimulation of immunity. Thus, the potential of plants, plant extracts and molecules derived from plants that are traditionally used in Morocco and have activity against SARS-CoV-2, could be explored in the search for a preventive or curative treatment against COVID-19. Furthermore, safe plants or plant extracts that are proven to stimulate immunity could be officially recommended by governments as nutritional supplements.

Treatment Options in COVID-19: The Role of Bioavailable Antiviral Ribonucleoside Analog on NHC in vitro

2020 ◽  
Author(s):  
Lara Bittmann
Keyword(s):  
World Health Organization ◽  
Clinical Picture ◽  
Treatment Options ◽  
World Health ◽  
Wuhan City ◽  
The World ◽  
Novel Coronavirus ◽  
Health Organization

On December 31, 2019, WHO was informed of cases of pneumonia of unknown cause in Wuhan City, China. A novel coronavirus was identified as the cause by Chinese authorities on January 7, 2020 and was provisionally named "2019-nCoV". This new Coronavirus causes a clinical picture which has received now the name COVID-19. The virus has spread subsequently worldwide and was explained on the 11th of March, 2020 by the World Health Organization to the pandemic.

scholarly journals Morphological Characteristics, Classifications and Difficulties in the Use of Diagnostic Criteria for Serrated Lesions of the Large Intestine

2021 ◽  
Author(s):  
Cesar de Souza Bastos Junior ◽  
Vera Lucia Nunes Pannain ◽  
Adriana Caroli-Bottino
Keyword(s):  
Diagnostic Criteria ◽  
Morphological Characteristics ◽  
World Health ◽  
Diagnostic Tools ◽  
Serrated Adenoma ◽  
The Past ◽  
The World ◽  
Serrated Lesions ◽  
Health Organization

Abstract Introduction Colorectal carcinoma (CRC) is the most common gastrointestinal neoplasm in the world, accounting for 15% of cancer-related deaths. This condition is related to different molecular pathways, among them the recently described serrated pathway, whose characteristic entities, serrated lesions, have undergone important changes in their names and diagnostic criteria in the past thirty years. The multiplicity of denominations and criteria over the last years may be responsible for the low interobserver concordance (IOC) described in the literature. Objectives The present study aims to describe the evolution in classification of serrated lesions, based on the last three publications of the World Health Organization (WHO) and the reproducibility of these criteria by pathologists, based on the evaluation of the IOC. Methods A search was conducted in the PubMed, ResearchGate and Portal Capes databases, with the following terms: sessile serrated lesion; serrated lesions; serrated adenoma; interobserver concordance; and reproducibility. Articles published since 1990 were researched. Results and Discussion The classification of serrated lesions in the past thirty years showed different denominations and diagnostic criteria. The reproducibility and IOC of these criteria in the literature, based on the kappa coefficient, varied in most studies, from very poor to moderate. Conclusions Interobserver concordance and the reproducibility of microscopic criteria may represent a limitation for the diagnosis and appropriate management of these lesions. It is necessary to investigate diagnostic tools to improve the performance of the pathologist's evaluation, for better concordance, and, consequently, adequate diagnosis and treatment.

scholarly journals A Review of the Preclinical and Clinical Efficacy of Remdesivir, Hydroxychloroquine, and Lopinavir-Ritonavir Treatments against COVID-19

2020 ◽  
Vol 25 (10) ◽  
pp. 1108-1122 ◽  
Author(s):  
Dawid Maciorowski ◽  
Samir Z. El Idrissi ◽  
Yash Gupta ◽  
Brian J. Medernach ◽  
Michael B. Burns ◽  
...  
Keyword(s):  
Gastrointestinal Symptoms ◽  
High Risk Group ◽  
Capital City ◽  
World Health ◽  
Atypical Pneumonia ◽  
Live Animal ◽  
The World ◽  
Novel Coronavirus ◽  
Health Organization

In December of 2019, an outbreak of a novel coronavirus flared in Wuhan, the capital city of the Hubei Province, China. The pathogen has been identified as a novel enveloped RNA beta-coronavirus named severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The virus SARS-CoV-2 is associated with a disease characterized by severe atypical pneumonia known as coronavirus 2019 (COVID-19). Typical symptoms of this disease include cough, fever, malaise, shortness of breath, gastrointestinal symptoms, anosmia, and, in severe cases, pneumonia.1 The high-risk group of COVID-19 patients includes people over the age of 60 years as well as people with existing cardiovascular disease and/or diabetes mellitus. Epidemiological investigations have suggested that the outbreak was associated with a live animal market in Wuhan. Within the first few months of the outbreak, cases were growing exponentially all over the world. The unabated spread of this deadly and highly infectious virus is a health emergency for all nations in the world and has led to the World Health Organization (WHO) declaring a pandemic on March 11, 2020. In this report, we consolidate and review the available clinically and preclinically relevant results emanating from in vitro animal models and clinical studies of drugs approved for emergency use as a treatment for COVID-19, including remdesivir, hydroxychloroquine, and lopinavir-ritonavir combinations. These compounds have been frequently touted as top candidates to treat COVID-19, but recent clinical reports suggest mixed outcomes on their efficacies within the current clinical protocol frameworks.

scholarly journals Expanding Waistlines: A "Nutrition Transition" in China

Elements ◽  
2010 ◽  
Vol 6 (1) ◽  
Author(s):  
Kitsy Smith
Keyword(s):  
Nutrition Transition ◽  
Future Generations ◽  
World Health ◽  
Economic Productivity ◽  
Obesity Epidemic ◽  
The Past ◽  
The World ◽  
Health Organization ◽  
Medical Advances

As China's coffers have swelled over the past three decades, its citizens' waistlines have also expanded. Western goods and lifestyles habits are consistently being imported into the Asian giant, including the obesity epidemic. Chinese children are particularly susceptible and future generations face tremendous health risks despite medical advances. States and international bodies such as the World Health Organization are alarmed at the damage obesity is already producing. The price tag to treat the health problems associated with obesity and the rsulting loss in economic productivity is staggering. While this essay uses China as a case study to examine the causes of obesity and its consequences, social and economic health, the grim reality is that this pattern is occurring worldwide as countries develop and their people adopt Western "nutritional" norms.

Effect of Panax notoginseng Extracts on Inferior Sperm Motility in vitro

1999 ◽  
Vol 27 (01) ◽  
pp. 123-128 ◽  
Author(s):  
Jung-Chou Chen ◽  
Ming-Xiong Xu ◽  
Leih-Der Chen ◽  
Yan-Nian Chen ◽  
Tsan Hung Chiu
Keyword(s):  
Sperm Motility ◽  
Sperm Count ◽  
Semen Analysis ◽  
Panax Notoginseng ◽  
World Health ◽  
Computer Assisted ◽  
Butanol Extract ◽  
The World ◽  
Health Organization

The purpose of this study was to investigate the effects of Panax notoginseng extracts on inferior sperm motility in vitro. Semen samples were collected from 23 patients with sperm motility between 20% and 40%. The sperm count was over 20 × 106/ml in accordance with the World Health Organization standard. 1.0 mg/ml and 2.0 mg/ml of Panax notoginseng extracts including aqueous extract, n-butanol extract, and polysaccharide fraction on sperm motility and progression were evaluated by computer assisted semen analysis. The results demonstrated that sperm motility as well as progression on inferior sperm motility were enhanced at 1 hour and 2 hours after incubation with all three types of extracts.

scholarly journals Avibactam Restores the Susceptibility of Clinical Isolates of Stenotrophomonas maltophilia to Aztreonam

2017 ◽  
Vol 61 (10) ◽  
Author(s):  
Maria F. Mojica ◽  
Krisztina M. Papp-Wallace ◽  
Magdalena A. Taracila ◽  
Melissa D. Barnes ◽  
Joseph D. Rutter ◽  
...  
Keyword(s):  
Stenotrophomonas Maltophilia ◽  
Opportunistic Pathogen ◽  
Multidrug Resistant ◽  
World Health ◽  
Combination Therapies ◽  
Content Type ◽  
Medical Need ◽  
The World ◽  
Health Organization

ABSTRACT Stenotrophomonas maltophilia is an emerging opportunistic pathogen, classified by the World Health Organization as one of the leading multidrug-resistant organisms in hospital settings. The need to discover novel compounds and/or combination therapies for S. maltophilia is urgent. We demonstrate the in vitro efficacy of aztreonam-avibactam (ATM-AVI) against S. maltophilia and kinetically characterize the inhibition of the L2 β-lactamase by avibactam. ATM-AVI overcomes aztreonam resistance in selected clinical strains of S. maltophilia, addressing an unmet medical need.

scholarly journals Coronavirus Pandemic: Situation in Nigeria

2021 ◽  
Vol 1 (2) ◽  
pp. 44-50
Author(s):  
Francis Olawale Abulude ◽  
Akinyinka Akinnusotu ◽  
Samuel Dare Oluwagbayide ◽  
Usha Damodharan ◽  
Ifeoluwa Ayodeji Abulude
Keyword(s):  
Urban Communities ◽  
Death Rate ◽  
World Health ◽  
Bibliographic Databases ◽  
Global Literature ◽  
Elderly Individuals ◽  
The Past ◽  
The World ◽  
Nigerian Government ◽  
Health Organization

COVID - 19 is an issue ravaging the whole world. Numerous deaths have been recorded particularly elderly individuals and the most vulnerable. In Nigeria, the case isn't extraordinary. The aim of the study was to quantify the number of cases reported in Nigeria. To this effect, the global literature cited in the Nigeria Centre for Disease Control (NCDC) website, the WHO COVID-19 database, other expert-referred scientific articles, and bibliographic databases were used. The results show that as at the sixteenth of May 2020, 288 new affirmed cases and 3 deaths were recorded in Nigeria. Till date, 5445 cases have been affirmed, 778 cases have been released and 171 deaths have been recorded in 34 states and the Federal Capital Territory, While Lagos State is for the most part influenced with 36 deaths in comparison with the cases revealed by the World Health Organization (4,425,485 cases affirmed, 89,269 new cases and 302,059 deaths). The death rate in Nigeria is about 0.05% of the global deaths. The explanation could be because of high temperature (> 30 oC), the intake of garlic, ginger, honey, and heated water by the individuals, and to stop the spread, the Nigerian government has implemented the utilization of nose cover, social distancing, and semi-lockdown of the towns and urban communities. Like HIV and Laser fever this pandemic will be an issue of the past when the adequate vaccine is made available.

scholarly journals Differences and Similarities between Coronaviruses: A Comparative Review

2021 ◽  
Vol 9 (4) ◽  
Author(s):  
Maad M. Mijwil ◽  
Ayser Shamil Alsaadi ◽  
Karan Aggarwal
Keyword(s):  
World Health ◽  
Infected People ◽  
The Past ◽  
Preventive Vaccine ◽  
Comparative Review ◽  
The World ◽  
Structural Differences ◽  
Health Organization ◽  
Near Future ◽  
Future Reference

Today, humans fight powerful and active viruses that never take hold and do not know defeat, named coronaviruses. These viruses have start in 2002 and continued to grow and have changed their chains dramatically until now. They are known for having many similar features in common, and there are also structural differences between them. The most important reason that has turned coronaviruses into a pandemic is that this disease is easily transmitted by droplets near infected people, which leads to the spread of this virus faster worldwide. The more details known about coronaviruses that have profoundly affected humanity in the past and present and the diseases they cause, the more benefit in help designing an immune response or preventive vaccine to these viruses in the near future. In this article, coronaviruses, how they have been started and spread, and what differences and similarities are between them will be briefly covered here. The information of this investigation is taken from articles and the world health organization and are reviewed here. The goal is to document this information for future reference.

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