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Kristen L Lokken, Gregory T Walker, Renée M Tsolis
Non-typhoidal Salmonella enterica serovars (NTS) are generally associated with gastroenteritis; however, the very young and elderly, as well as individuals with compromised immunity, are at risk of developing disseminated infection that can manifest as bacteremia or focal infections at systemic sites. Disseminated NTS infections can be fatal and are responsible for over 600,000 deaths annually. Most of these deaths are in sub-Saharan Africa, where multi-drug resistant NTS clones are currently circulating in a population with a high proportion of individuals that are susceptible to disseminated disease...
October 8, 2016: Pathogens and Disease
Irfan Ahmad, Syed Fazle Rouf, Lei Sun, Annika Cimdins, Sulman Shafeeq, Soazig Le Guyon, Marco Schottkowski, Mikael Rhen, Ute Römling
BACKGROUND: Cellulose, a 1,4 beta-glucan polysaccharide, is produced by a variety of organisms including bacteria. Although the production of cellulose has a high biological, ecological and economical impact, regulatory mechanisms of cellulose biosynthesis are mostly unknown. Family eight cellulases are regularly associated with cellulose biosynthesis operons in bacteria; however, their function is poorly characterized. In this study, we analysed the role of the cellulase BcsZ encoded by the bcsABZC cellulose biosynthesis operon of Salmonella enterica serovar Typhimurium (S...
October 19, 2016: Microbial Cell Factories
Sabz Ali, Amjad Ali, Sajjad Ahmad Khan, Sundas Hussain
For most of the time, biomedical researchers have been dealing with ordinal outcome variable in multilevel models where patients are nested in doctors. We can justifiably apply multilevel cumulative logit model, where the outcome variable represents the mild, severe, and extremely severe intensity of diseases like malaria and typhoid in the form of ordered categories. Based on our simulation conditions, Maximum Likelihood (ML) method is better than Penalized Quasilikelihood (PQL) method in three-category ordinal outcome variable...
2016: Computational and Mathematical Methods in Medicine
Koh Shinohara, Kei Yamamoto, Yasuyuki Kato, Norio Ohmagari
No abstract text is available yet for this article.
2016: Internal Medicine
Ahmed A Al-Qahtani, Mashael R Al-Anazi, Fahad A Al-Zoghaibi, Ayman A Abdo, Faisal M Sanai, Waleed K Al-Hamoudi, Khalid A Alswat, Hamad I Al-Ashgar, Mohammed Q Khan, Ali Albenmousa, Hanif Khalak, Mohammed N Al-Ahdal
:  Background. The protein encoded by PARK2 gene is a component of the ubiquitin-proteasome system that mediates targeting of proteins for the degradation pathway. Genetic variations at PARK2 gene were linked to various diseases including leprosy, typhoid and cancer. The present study investigated the association of single nucleotide polymorphisms (SNPs) in the PARK2 gene with the development of hepatitis C virus (HCV) infection and its progression to severe liver diseases. MATERIAL AND METHODS: A total of 800 subjects, including 400 normal healthy subjects and 400 HCV-infected patients, were analyzed in this study...
November 2016: Annals of Hepatology
Kathrin I Mohr
For thousands of years people were delivered helplessly to various kinds of infections, which often reached epidemic proportions and have cost the lives of millions of people. This is precisely the age since mankind has been thinking of infectious diseases and the question of their causes. However, due to a lack of knowledge, the search for strategies to fight, heal, and prevent the spread of communicable diseases was unsuccessful for a long time. It was not until the discovery of the healing effects of (antibiotic producing) molds, the first microscopic observations of microorganisms in the seventeenth century, the refutation of the abiogenesis theory, and the dissolution of the question "What is the nature of infectious diseases?" that the first milestones within the history of antibiotics research were set...
October 15, 2016: Current Topics in Microbiology and Immunology
Rajeev Soman, Neha Gupta, Mitesh Suthar, Jatin Kothari, Alan Almeida, Anjali Shetty, Camilla Rodrigues
BACKGROUND: Central-line-associated blood-stream infection (CLABSI) is a highly consequential nosocomial infection. The most effective management includes the removal of the infected catheter. Retention of the catheter and antibiotic lock therapy (ALT) along with systemic antibiotics may be attempted only if there are unusual extenuating circumstances. CLABSIs due to Gram-negative bacteria (GNB) is more common in our setting and the organisms are often highly resistant. Hence, there is a need to explore the use of novel antimicrobials for catheter lock solutions along with antibiofilm agents...
February 2016: Journal of the Association of Physicians of India
H M Vincent
Famous for the discovery of the parasite, Leishmania, named after him, and the invention of Leishman's stain, William Boog Leishman should perhaps be better known for his work in military and public health, particularly the prevention of typhoid. Leishman was a Medical Officer in the British Army from 1887 until his death in 1926. His early research was on diseases affecting troops posted to stations within the British Empire. He saw cases of Leishmaniasis while stationed in India, and was able to identify the causative organism from his detailed records of his observations...
October 12, 2016: Parasitology
Kumar V Br, Kishore D, Diwaker A, Yadav V, Tiwari A
No abstract text is available yet for this article.
January 2016: Journal of the Association of Physicians of India
Jill Koshiol, Aniela Wozniak, Paz Cook, Christina Adaniel, Johanna Acevedo, Lorena Azócar, Ann W Hsing, Juan C Roa, Marcela F Pasetti, Juan F Miquel, Myron M Levine, Catterina Ferreccio
In Chile, where gallbladder cancer (GBC) rates are high and typhoid fever was endemic until the 1990s, we evaluated the association between Salmonella enterica serovar Typhi (S. Typhi) antibodies and GBC. We tested 39 GBC cases, 40 gallstone controls, and 39 population-based controls for S. Typhi Vi antibodies and performed culture and quantitative polymerase chain reaction for the subset with bile, gallstone, tissue, and stool samples available. We calculated gender and education-adjusted odds ratios (ORs) and 95% confidence intervals (CIs) for the association with GBC...
October 11, 2016: Cancer Medicine
Aleš Chrdle, Vaclav Chmelik, Daniel Ruzek
Tick-borne encephalitis (TBE) is an acute febrile illness with neurological manifestations that is prevalent in forested areas of moderate climate in Europe and Asia. TBE virus is transmitted by ticks and rarely by unpasteurized milk and dairy products. The disease burden is attributed mainly to resulting long-term disability, especially in individuals over 50 years of age. Currently, there is no causative treatment, but a very effective vaccination is available with a good safety profile. The vaccination requires three basic doses to be fully effective and regular boosters afterwards...
August 15, 2016: Human Vaccines & Immunotherapeutics
Leonard Ndayizeye, Christian Ngarambe, Blair Smart, Robert Riviello, Jean Paul Majyambere, Jennifer Rickard
BACKGROUND: Few studies discuss causes and outcomes of peritonitis in low-income settings. This study describes epidemiology of patients with peritonitis at a Rwandan referral hospital. Identification of risk factors associated with mortality and unplanned reoperation could improve management of peritonitis. METHODS: Data were collected on demographics, clinical presentation, operative findings, and outcomes for all patients with peritonitis. Multivariate regression analysis identified factors associated with in-hospital mortality and unplanned reoperation...
October 3, 2016: Surgery
Vanessa K Wong, Stephen Baker, Thomas R Connor, Derek Pickard, Andrew J Page, Jayshree Dave, Niamh Murphy, Richard Holliman, Armine Sefton, Michael Millar, Zoe A Dyson, Gordon Dougan, Kathryn E Holt
The population of Salmonella enterica serovar Typhi (S. Typhi), the causative agent of typhoid fever, exhibits limited DNA sequence variation, which complicates efforts to rationally discriminate individual isolates. Here we utilize data from whole-genome sequences (WGS) of nearly 2,000 isolates sourced from over 60 countries to generate a robust genotyping scheme that is phylogenetically informative and compatible with a range of assays. These data show that, with the exception of the rapidly disseminating H58 subclade (now designated genotype 4...
October 5, 2016: Nature Communications
Julius Ho, Gladys Odhiambo, Lucy W Meng'anyi, Rosemary M Musuva, Joseph M Mule, Zakayo S Alaly, Maurice R Odiere, Pauline N Mwinzi, Lisa Ganley-Leal
BACKGROUND: Private sector medicine outlets are an important provider of health services across the developing world, and are an untapped means of distributing and selling vaccines outside of childhood immunization programs. The present study assessed the viability of medicine outlets (chemists and pharmacies) as potential channels for sale of vaccines. METHODS: To evaluate the viability of the medicine outlet model, we partnered with nine outlets across urban and rural communities in western Kenya to sell a nurse-administered typhoid vaccine...
September 29, 2016: BMC Health Services Research
Androniki Psifidi, Georgios Banos, Oswald Matika, Takele T Desta, Judy Bettridge, David A Hume, Tadelle Dessie, Rob Christley, Paul Wigley, Olivier Hanotte, Pete Kaiser
BACKGROUND: The majority of chickens in sub-Saharan Africa are indigenous ecotypes, well adapted to the local environment and raised in scavenging production systems. Although they are generally resilient to disease challenge, routine vaccination and biosecurity measures are rarely applied and infectious diseases remain a major cause of mortality and reduced productivity. Management and genetic improvement programmes are hampered by lack of routine data recording. Selective breeding based on genomic technologies may provide the means to enhance sustainability...
September 29, 2016: Genetics, Selection, Evolution: GSE
Madushini N Dharmasena, Catherine M Feuille, Carly Elizabeth C Starke, Arvind A Bhagwat, Scott Stibitz, Dennis J Kopecko
The licensed oral, live-attenuated bacterial vaccine for typhoid fever, Salmonella enterica serovar Typhi strain Ty21a, has also been utilized as a vaccine delivery platform for expression of diverse foreign antigens that stimulate protection against shigellosis, anthrax, plague, or human papilloma virus. However, Ty21a is acid-labile and, for effective oral immunization, stomach acidity has to be either neutralized with buffer or by-passed with Ty21a in an enteric-coated capsule (ECC). Several studies have shown that efficacy is reduced when Ty21a is administered in an ECC versus as a buffered liquid formulation, the former limiting exposure to GI tract lymphoid tissues...
2016: PloS One
Öznur Küçük, Suat Biçer, Meltem Ugraş, Defne Çöl, Tuba Giray, Gülay Çiler Erdag, Yeşim Gürol, Gülden Yilmaz, Zerrin Yalvaç, Ayça Vitrinel, Çigdem Kaspar
The purpose of this study was to evaluate the clinical and laboratory data of children with acute gastroenteritis caused by non-typhoid Salmonella spp. infections. Clinical (demographic data, symptoms and findings) and laboratory data (stool microscopy, rapid antigen tests, culture, multiplex polymerase chain reaction and blood test results) of children with acute gastroenteritis caused by non-typhoid Salmonella spp. between January 2010 and October 2012 were evaluated. Differences between the groups for categorical variables were estimated with a chi-square or Fisher exact test; for continuous variables with two independent samples a t test was used...
September 1, 2016: Le Infezioni in Medicina
Engin Burak Selcuk, Uner Kayabas, Hulisi Binbasioglu, Baris Otlu, Yasar Bayindir, Bulent Bozdogan, Mehmet Karatas
BACKGROUND: The number of international travellers is increasing worldwide. Although health risks related to international travel are important and generally well-understood, the perception of these risks was unclear among Turkish travellers. We aimed to evaluate the attitudes and health risk awareness of Turkish travellers travelling to African countries. METHOD: A survey was performed of Turkish travellers bound for Africa from Istanbul International Ataturk Airport in July 2013...
September 20, 2016: Travel Medicine and Infectious Disease
Rezwanul Wahid, Stephanie Fresnay, Myron M Levine, Marcelo B Sztein
The live oral typhoid vaccine Ty21a elicits predominantly CD8+, as well as CD4+ T cells mediated immune responses.Clinical field studies showed that Ty21a is moderately effective against S. Typhi and S. Paratyphi B, but not S. Paratyphi A infections. In this study we describe the in depth characterization of S. Typhi, S. Paratyphi A and S. Paratyphi B cross-reactive CD4+ T cell responses elicited following immunization with Ty21a.PBMC samples were collected from 16 healthy volunteers before and 42/84days after Ty21a immunization and stimulated ex-vivo with Salmonella-infected targets...
September 12, 2016: Clinical Immunology: the Official Journal of the Clinical Immunology Society
Amoolya Bhat, Vijaya Chowdappa, Smita Surendra Masamatti
INTRODUCTION: Dengue affects more than 50 million people per year and is one of the most common causes of severe thrombocytopaenia. Thrombocytopaenia is a common complication of dengue and other viral fevers apart from malaria, typhoid, leptospirosis, leukaemia and megaloblastic anaemia. A platelet count of <20,000/μl is characteristically seen in dengue haemorrhagic fever and dengue fever. It results from immune complex mediated platelet destruction or bone marrow suppression. Severe thrombocytopaenia <10,000/μl is one of the indications for prophylactic platelet transfusion therapy to prevent haemorrhage...
July 2016: Journal of Clinical and Diagnostic Research: JCDR
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