Why cholera is noninflammatory

Source: ScienceNOW - Category: Science Authors: Tags: twis Source Type: news

Related Links:

TTP, a technology company based in Melbourn, UK, is developing a handheld PCR (polymerase chain reaction) diagnostic device that can rapidly detect influenza viruses, and one day other viruses, in samples of nasal mucus. The company claims that the s...
Source: Medgadget - Category: Medical Devices Authors: Tags: Diagnostics Exclusive Public Health Source Type: blogs
In this report, we investigated six RND efflux-responsive regulatory genes for contributions to V. cholerae virulence factor production. Our data showed that the V. cholerae gene VC2714, encoding a homolog of Escherichia coli OmpR, was a virulence repressor. The expression of ompR was elevated in an RND-null mutant, and ompR deletion partially restored virulence factor production in the RND-negative background. Virulence inhibitory activity in the RND-negative background resulted from OmpR repression of the key ToxR regulon virulence activator aphB, and ompR overexpression in wild-type cells also repressed virulence throug...
Source: Infection and Immunity - Category: Infectious Diseases Authors: Tags: Molecular Pathogenesis Source Type: research
In this study, we found that another key virulence regulator, ToxR, was important for V. cholerae resistance to hydrogen peroxide. Through a genome-wide transposon screen, we discovered that a deletion in mneA, which encodes a manganese exporter, restored ROS resistance of the toxR mutant. We then showed that ToxR did not affect mneA transcription but that the ToxR-regulated major porin OmpU was critical for ROS resistance. The addition of manganese in culture medium restored ROS resistance in both the toxR and ompU mutants. Furthermore, elemental analysis indicated that the intracellular concentration of manganese in both...
Source: Infection and Immunity - Category: Infectious Diseases Authors: Tags: Molecular Pathogenesis Source Type: research
el Moss Arginine-specific mono-adenosine diphosphate (ADP)-ribosylation is a nicotinamide adenine dinucleotide (NAD)+-dependent, reversible post-translational modification involving the transfer of an ADP-ribose from NAD+ by bacterial toxins and eukaryotic ADP-ribosyltransferases (ARTs) to arginine on an acceptor protein or peptide. ADP-ribosylarginine hydrolase 1 (ARH1) catalyzes the cleavage of the ADP-ribose-arginine bond, regenerating (arginine)protein. Arginine-specific mono-ADP-ribosylation catalyzed by bacterial toxins was first identified as a mechanism of disease pathogenesis. Cholera toxin ADP-ribosylates and...
Source: Cancers - Category: Cancer & Oncology Authors: Tags: Review Source Type: research
[MSF] MSF has been providing healthcare in Cabo Delgado province, one of the poorest and most isolated regions of Mozambique, since February 2019. Early activities were rapidly disrupted by Cyclone Kenneth in late April 2019, and replaced with emergency response to displacement and cholera. Since then, MSF has been building up healthcare activities. Bruno Cardoso, MSF's project coordinator, has just returned from Mozambique and tells us more about the situation and what MSF does there.
Source: AllAfrica News: Health and Medicine - Category: African Health Source Type: news
In 1817 there was a major outbreak of cholera in India that spread to Asia and Europe. The disease reached England in 1831, and war in America and Europe helped its spread. Here the author describes the bacteriology, pathogenesis, diagnosis, treatment and prevention of this notifiable disease.
Source: Trends in Urology and Men's Health - Category: Urology & Nephrology Authors: Tags: Infections Source Type: research
Abstract Type III secretion systems (T3SS) can be found in many pathogenic bacteria, such as Dysentery bacillus, Salmonella typhimurium, Vibrio cholera and pathogenic Escherichia coli. The routes of infection of these bacteria include the T3SS transferring a large number of type III secreted effectors (T3SE) into host cells, thereby blocking or adjusting the communication channels of the host cells. Therefore, the accurate identification of T3SEs is the precondition for the further study of pathogenic bacteria. In this article, a new T3SEs ensemble predictor was developed, which can accurately distinguish T3SEs fr...
Source: Briefings in Bioinformatics - Category: Bioinformatics Authors: Tags: Brief Bioinform Source Type: research
Pandemics of influenza, cholera, and plague are part of global history. Regional epidemics and pandemics of infectious diseases, primarily influenza A, continue to cause significant morbidity and mortality while remaining unpredictable in nature. Sudden-on...
Source: SafetyLit - Category: International Medicine & Public Health Tags: Disaster Preparedness Source Type: news
Pandemics are perversely democratic. They’re nasty, lethal and sneaky, but they don’t discriminate. No matter your age, ethnicity, religion, gender, or nation, you’re a part of the pathogenic constituency. That shared vulnerability, and the resulting human collectivism—a universal response to a universal threat—is newly and vividly evident in the face of the now-global outbreak of the novel coronavirus known as 2019-nCoV. As of writing, there have been over 30,000 diagnosed cases and over 630 related deaths. A virus that emerged in a single city, Wuhan, China—indeed, in a single crowded ...
Source: TIME: Health - Category: Consumer Health News Authors: Tags: Uncategorized 2019-nCoV Infectious Disease Source Type: news
In this study, by combining the short-read and long-read sequencing approaches of next generation sequencing, we obtained the complete genome sequence of the studied V. cholerae toxigenic serogroup O139 strain and identified the CTXΦ and a pre-CTXΦ genome type encoding a novel rstR allele, pre-CTXZHJΦ. This pre-CTX prophage integrates into the small chromosome of the V. cholerae host strain and coexists with a typical CTXETΦ prophage present in the large chromosome, which is commonly present in the seventh pandemic serogroup O1 and toxigenic serogroup O139 strains. RstRZHJ could bind to the ig-2 region in t...
Source: Infection, Genetics and Evolution - Category: Genetics & Stem Cells Authors: Tags: Infect Genet Evol Source Type: research
More News: Cholera | Science