70 results about "STREPTOCOCCAL INFECTIONS" patented technology

Isolated proteins, designated Cpa1 and Cpa49, and their corresponding amino acid and nucleic acid sequences are provided which are useful in the prevention and treatment of infection caused by group A streptococcal bacteria such as Streptococcus pyogenes. These proteins have been observed to bind to collagen, and thus methods are provided, such as by administration of the proteins or antibodies generated thereto, whereby streptococcal binding of collagen can be inhibited, and streptococcal infection can be greatly reduced. In addition, medical instruments can be treated using the collagen-binding proteins of the invention in order to reduce or eliminate the possibility of their becoming infected or further spreading the infection. In particular, the proteins are advantageous because they may be used as vaccine components or antibodies thereof, and they may be administered to wounds or used to coat biomaterials in order to act as collagen blocking agents and reduce or prevent severe infection by group A streptococcal bacteria.

Methods and compositions comprising isolated nucleic acid molecules specific to Streptococcus pneumoniae and Streptococcus pyogenes, as well as vector constructs and isolated polypeptides specific to Streptococcus pneumoniae and Streptococcus pyogenes are provided. Such compositions and methods are useful for the diagnosis of Streptococcal infection and for generating an immune response to Streptococcal bacteria.

Isolated proteins, designated Cpa1 and Cpa49, and their corresponding amino acid and nucleic acid sequences are provided which are useful in the prevention and treatment of infection caused by group A streptococcal bacteria such as Streptococcus pyogenes. These proteins have been observed to bind to collagen, and thus methods are provided, such as by administration of the proteins or antibodies generated thereto, whereby streptococcal binding of collagen can be inhibited, and streptococcal infection can be greatly reduced. In addition, medical instruments can be treated using the collagen-binding proteins of the invention in order to reduce or eliminate the possibility of their becoming infected or further spreading the infection. In particular, the proteins are advantageous because they may be used as vaccine components or antibodies thereof, and they may be administered to wounds or used to coat biomaterials in order to act as collagen blocking agents and reduce or prevent severe infection by group A streptococcal bacteria.

Provided are streptolysin S (SLS) polypeptides, peptides, and variants thereof, antibodies directed thereto, and isolated nucleic acids encoding such proteins. In one embodiment, a method is provided wherein a synthetic peptide of SLS is used to elicit an immune response specific for SLS in a subject to treat or prevent a streptococcal infection. In other embodiments, antibodies that neutralize the hemolytic activity of the SLS toxin may be used as a vaccinating agent.

The present invention relates to a combination of 2 or more S pneumoniae proteins, their manufacture and use in medicine as a vaccine. Such combinations are particularly useful for the protection of infants and elderly against streptococcal infection.

The invention relates to the field of diagnosis of and vaccination against Streptococcal infections and to the detection of virulence markers of Streptococci. The invention discloses a method for modulating virulence of a Streptococcus, the method comprising modifying a genomic fragment of Streptococcus wherein the genomic fragment comprises at least a functional part of a fragment identifiable by hybridization in Streptococcus suis to a nucleic acid or fragment thereof as shown in FIG. 5.

The present invention relates to cell-surface-located polypeptides of Streptococcus pneumoniae and their use in immunisation against Streptococcal infection, in diagnosis of Streptococcus and in identification of compounds with anti-Streptococcus activity. In a further aspect, the invention relates to antibodies capable of recognising cell surface-located polypeptides of Streptococcus pneumoniae and uses thereof.

A composition for treatment of bacterial infections of the eye is disclosed which comprises a lytic enzyme composition specific for the infecting bacteria, and a carrier for delivering said lytic enzyme.. The carrier for delivering at least one lytic enzyme to the eye may be but is not limited to the use of an isotonic solution..

The present invention relates to cell-surface-located polypeptides of Streptococcus pneumoniae and their use in immunisation against Streptococcal infection, in diagnosis of Streptococcus and in identification of compounds with anti-Streptococcus activity. In a further aspect, the invention relates to antibodies capable of recognising cell surface-located polypeptides of Streptococcus pneumoniae and uses thereof.

The invention relates to the field of diagnosis of and vaccination against Streptococcal infections and to the detection of virulence markers of Streptococci. The invention discloses a method for modulating virulence of a Streptococcus comprising modifying a genomic fragment of Streptococcus wherein the genomic fragment comprises at least a functional part of a fragment identifiable by hybridization in Streptococcus suis to a nucleic acid or fragment thereof as shown in FIG. 5.

A method for determining a disease state prediction, relating to a potential disease or medical condition of a subject, includes accessing a set of subject images, the subject images capturing a part of a subject's body, and accessing a set of clinical factors from the subject. The clinical factors are collected by a device or a medical practitioner substantially contemporaneously with the capture of the subject images. The subject images are inputted into an image model to generate disease metrics for disease prediction for the subject. The disease metrics generated by the image model and the clinical factors are inputted into a classifier to determine the disease state prediction, and the disease state prediction is returned.

The invention relates to subunit immunogenic or vaccine compositions which may comprise at least one polypeptide of Streptococcus equi and methods for preparing and / or formulating such compositions. The invention also relates to the use of such subunit compositions, such as a method for eliciting an immunogenic response or a protective immune response, which may comprise administering the composition to a mammal susceptible to streptococcal infection.

Effective stimulation of immune responses is achieved through the use of a group A streptococcal antigen combined with proteosome adjuvant. The compositions are provided in particular for intranasal administration. The vaccine compositions are provided for use in inducing an immune response in an individual for the treatment or prophylaxis of group A streptococcal infection in an individual, preferably via prevention or reduction of colonisation of the throat following intranasal administration.

The present invention relates to polypeptides, epitopes and antibodies directed to these epitopes, more particularly to the Sip polypeptide of Group B streptococcus (GBS), also called Streptococcus Agalactiae which may be used to prevent, diagnose and / or treat streptococcal infection.

Provided are methods for diagnosing a disease in a subject with a previous streptococcal infection by determining the presence or absence of one or more autoantibodies in a biological sample from the subject, wherein the one or more autoantibodies recognize an antigen from a protein selected from the group consisting of ELAVL2, ELAVL3, ELAVL4, Nova-1, Nova-2, Cdr1, Cdr2; and Cdr3. The presence of such autoantibodies is indicative of a positive diagnosis for a post-streptococcal disease such as PANDAS, post-GABHS glomerulonephritis, rheumatic fever, autism and Syndenham's chorea.

Provided are streptolysin S (SLS) polypeptides, peptides, and variants thereof, antibodies directed thereto, and isolated nucleic acids encoding such proteins. In one embodiment, a method is provided wherein a synthetic peptide of SLS is used to elicit an immune response specific for SLS in a subject to treat or prevent a streptococcal infection. In other embodiments, antibodies that neutralize the hemolytic activity of the SLS toxin may be used as a vaccinating agent.

The invention relates to the field of the diagnosis of and vaccination against Streptococcal infections, and to the detection of virulence markers of Streptococci. The invention discloses a method for modulating virulence of a Streptococcus comprising modifying a genomic fragment of the Streptococcus, wherein the genomic fragment comprises at least a functional part of a fragment identifiable by hybridization in Streptococcus suis to a nucleic acid or fragment thereof.

The invention discloses a vaccine for preventing A type streptococcal infection. The vaccine provided by the invention has the active ingredients such as ingredient A, ingredient B, ingredient C, ingredient D, ingredient E and ingredient F; the ingredient A is sortase or fusion protein with sortase; the ingredient B is SCPA or fusion protein with SCPA; the ingredient C is Spy0269 or fusion proteinwith Spy0269; the ingredient D is SCPC or fusion protein with SCPC; the ingredient E is SLO or fusion protein with SLO; and the ingredient F is adjuvant CpG or other mucosal adjuvants. The vaccine provided by the invention has the advantages of high efficiency, broad spectrum and low cost. Meanwhile, the vaccine provided by the invention adopts the way of mucosal immunity, has the characteristicsof no tissue damage, no local side effect and simple and convenient use, and is easy to popularize and use.

Methods, compositions and kits for detecting Group A streptococcus in a biological sample are described. More particularly, the present disclosure provides an immunoassay in which the specificity of detection of Group A streptococcus is enhanced by addition of N-acetyl-D-glucosamine. These methods, compositions and kits are useful in convenient, reliable and early diagnosis of streptococcal infection in a human subject.

The invention relates to a polysaccharide conjugate vaccine for preventing pneumonia streptococcal infection, which is prepared by connecting pneumococcal capsular polysaccharide to tetanus toxoid by using a 'click chemistry' method. The immunogenicity of the polysaccharide conjugate vaccine is improved by prolonging the length of a connecting bridge between the pneumococcal capsular polysaccharide and the tetanus toxoid.

The invention provides an aquatic feed pre-digestion method, and belongs to the technical field of feed processing. The pre-digestion method firstly mixes an aquatic feed, lactobacillus plantarum, bacillus cereus and molasses according to a mass ratio of 100:2-6:0.2-0.4:2-6,adjusts the water content of a mixture to 25-40% by adding water, and finally places a material to be fermented in a sealed package for fermenting for 18-36 hours to obtain a pre-digestion aquatic feed. The pre-digestion method can maximize the functions of detoxifying and antagonizing pathogenic bacteria of a functional microbial feed;the fermentation of the method is basically not limited by an environmental temperature, the equipment investment is small, the operation is simple, and the process is stable. The application of the methodto tilapia culture can effectively improve the growth performance of the tilapia and the ability to resist streptococcal infection, increase the survival rate after infection of thebacteria, and be a pre-digestion treatment technology for the aquatic feed before feeding which is worthy of popularization and application.

The invention provides a tilapia feed additive for reducing proinflammatory response and enhancing immune response and a preparation method and an application thereof, and belongs to the technical field of aquaculture. The tilapia feed additive for reducing proinflammatory response and enhancing immune response comprises the following components in parts by weight: 25-35 parts of manyprickle acanthopanax stems, 15-25 parts of loquat leaves, 15-25 parts of tripterygium wilfordii, 10-20 parts of hawthorn fruits and 10-20 parts of mulberry leaves. The invention also provides a tilapia feed containing the tilapia feed additive, and an application of the tilapia feed additive or the tilapia feed in tilapia breeding. The application can effectively reduce the proinflammatory response of the headkidney tissue and the spleen tissue of the tilapia, and enhance the immune response capability of the tilapia, thereby improving the capability of the tilapia against streptococcal infection.

This invention provides a novel immunogenic composition and vaccine, processes for producing them and methods for immunization against infections and disease caused by group A Streptococci. The compositions include group A streptococcal polysaccharide covalently linked to protein or liposomes to form immunogenic conjugates. The method of immunization for this invention comprises administering to an individual an immunogenic amount of group A polysaccharide. The group A polysaccharide may be administered as a vaccine either on its own, conjugated to proteins or conjugated to liposomes. Additionally, the group A polysaccharides may be associated with an adjuvant. This invention is particularly useful for providing both active and passive immunogenic protection for those populations most at risk of contracting group A Streptococcal infections and disease namely adults, pregnant women and in particular infants and children.

The present invention provides a panel of at least five clinical analyses or tests (using serum samples) to determine the risk of pediatric acute-onset neuropsychiatric syndrome (PANS) and / or pediatric autoimmune neuropsychiatric disorder associated with streptococcal infection (PANDAS) in an individual. These include enzyme linked immunosorbent assays (ELISAs) to measure antibody titers against neuronal antigens present in the brain; the neuronal antigens include lysoganglioside, tubulin, dopamine receptor D1, dopamine receptor D2, serotonin receptor 5HT2A, and serotonin receptor 5HT2C. Antibody titers against at least four of these neuronal antigens are required in the present methods; preferably antibody tiers against all of these neuronal antigens are measured. A final assay is used to quantify calcium / calmodulin-dependent protein kinase activity using a neuronal cell line. The results of these analyses or tests are then combined using an algorithm to determine whether a PANS or PANDAS diagnosis is appropriate for the individual. Depending on the diagnosis, an appropriate treatment can be determined.

The present invention discloses a combined vaccine for inhibiting and / or preventing type A streptococcal infection. The present invention provides a composition for inhibiting streptococcus and / or preventing streptococcal infection, and the composition comprise an immunogen. The immunogen is one of the following 1)-4): 1) the immunogen comprises a sortase A and a C5a protease; 2) the immunogen comprises a sortase A solution and a C5a protease solution; 3) the immunogen comprise a fusion protein containing sortase A and a fusion protein containing C5a protease; and 4) the immunogen comprises a junctional complex of sortase A and polysaccharide and a junctional complex of C5a protease and polysaccharide. The specific amino acid sequence of the sortase A is the N-terminal amino acid residues from site No.22 to No.189 of a sequence 2; and the amino acid sequence of the C5a protease is a sequence 4 in the sequence table. The combined vaccine can be applied to prevention and treatment of mucosal system infections caused a variety of Gram-positive bacteria.

The present invention provides a group B streptococcal (GBS) surface antigen, designated epsilon antigen, that is co-expressed with the delta antigen on a subset of serotype III GBS. Epsilon is expressed on more pathogenic Restriction Digest Pattern (RDP) III-3 GBS, but not on RDP types 1, 2, or 4. Accordingly, the present invention provides compositions and methods for detecting a group B streptococcus serotype III, RDP III-3 strain. Vaccines and methods of identifying agents which inhibit adhesion of a group B streptococcal cell to a host cell are also provided.