42 results about "Serogroup c" patented technology

A composition comprising (a) Neisseria meningitidis serogroup B outer membrane vesicles (OMVs), and (b) an immunogenic component selected from other Neisseria proteins, or immunogenic fragments thereof. Component (b) preferably includes a protein from a different NmB strain from that from which the OMV of component (a) is derived. The OMVs are preferably obtained by deoxycholate extraction. Optionally, the composition may also comprise a protective antigen against other pathogens.

The invention provides immunogenic compositions for mucosal delivery comprising capsular saccharides from at least two of serogroups A, C, W135 and Y of N. meningitidis. It is preferred that the capsular saccharides in the compositions of the invention are conjugated to carrier protein(s) and/or are oligosaccharides. Conjugated oligosaccharide antigens are particularly preferred. The invention also provides immunogenic compositions comprising (a) a capsular saccharide antigen from serogroup C of N. meningitidis, and (b) a chitosan adjuvant. The composition preferably comprises (c) one or more further antigens and/or (d) one or more further adjuvants. The compositions are particularly suitable for mucosal delivery, including intranasal delivery. The use of chitosan and/or detoxified ADP-ribosylating toxin adjuvants enhances anti-meningococcal mucosal immune responses and can shift the Th1/Th2 bias of the responses.

In one aspect, the invention relates to an isolated polypeptide comprising an amino acid sequence that is at least 95% identical to SEQ ID NO: 71. In another aspect, the invention relates to an immunogenic composition including an isolated non-lipidated, non-pyruvylated ORF2086 polypeptide from Neisseria meningitidis serogroup B, and at least one conjugated capsular saccharide from a meningococcal serogroup.

In one aspect, the invention relates to a composition including a factor H binding protein (fHBP) and a Neisseria meningitidis non-serogroup B capsular polysaccharide. The invention further relates to uses of a composition that includes fHBP, such as, for example, uses to elicit an immune response against N. meningitidis serogroup B strains and non-serogroup B strains. The compositions and methods described herein are directed to administration in humans, including adults, adolescents, toddlers, and infants.

Various improvements to vaccines that include a serogroup C meningococcal conjugate antigen, including: (a) co-administration with acellular B. pertussis antigen; (b) co-administration with an inactivated poliovirus antigen; (c) supply in a kit together with a separate pneumococcal conjugate component, which may be in a liquid form; and (d) use in combination with a pneumococcal conjugate antigen but without an aluminium phosphate adjuvant. A kit may have: (a) a first immunogenic component that comprises an aqueous formulation of a conjugated capsular saccharide from Streptococcus pneumoniae; (b) a second immunogenic component that comprises a conjugated capsular saccharide from Neisseria meningitidis serogroup C.

The invention provides immunogenic compositions comprising (a) a capsular saccharide antigen from serogroup C of N. meningitidis, and (b) a chitosan adjuvant. The composition preferably comprises (c) one or more further antigens and/or (d) one or more further adjuvants. The compositions are particularly suitable for mucosal delivery, including intranasal delivery. The invention also provides immunogenic compositions for mucosal delivery comprising capsular saccharides from at least two of serogroups A, C, W135 and Y of N. meningitidis. It is preferred that the capsular saccharides in the compositions of the invention are conjugated to carrier protein(s) and/or are oligosaccharides. Conjugated oligosaccharide antigens are particularly preferred.

Combination vaccines for treating or preventing Neisseria meningitidis infection are described. The vaccines include Neisseria meningitidis serogroup B proteoliposomic vesicles and Neissera meningitidis serogroup C conjugated oligosaccharides.

The invention is based on methods that allow analysis of mixed meningococcal saccharides from multiple serogroups even though they share monosaccharide units. With a combination of saccharides from serogroups C, W135 and Y, the invention analyses sialic acid, glucose and galactose content. The glucose and galactose results are used to directly quantify saccharides from serogroups Y and W135, respectively, and the combined glucose and galactose content is subtracted from the sialic acid content to quantify saccharides from serogroup C. The three serogroups can thus be resolved even though their monosaccharide contents overlap. The three different monosaccharide analyses can be performed on the same material, without interference between the monosaccharides and without interference from any other saccharide materials in the composition (e.g. lyophilisation stabilisers). The method can be used to analyse total and free saccharide in conjugate vaccines and simplifies quality control of vaccines containing capsular saccharides from multiple serogroups.

International patent application WO99/61053 discloses immunogenic compositions that comprise N. meningitidis serogroup C oligosaccharide conjugated to a carrier, in combination with N. meningitidis serogroup B outer membrane protein. These are disclosed in the present application in combination with further Neisserial proteins and/or protective antigens against other pathogenic organisms (e.g. Haemophilus influenzae, DTP, HBV, etc.).

The invention relates to real-time fluorescent quantitative RT-PCR detection primers for a serotype of a Palyam serogroup virus (PALV), probes and a detection kit and belongs to the technical field ofmolecular biological detection on animal viruses. The kit comprises 3 pairs of primers and further comprises three probes, a negative control template, positive control templates, standard substancetemplates and a PCR amplification reagent. RNase-free water serves as the negative control template; the positive control templates are CHUV, BCV and DAV inactivated viruses separately; and the standard substance templates are gene segment 2 single-stranded RNAs of CHUV, BCV and DAV. The kit disclosed by the invention can be used for detecting three kinds of serotype PALVs popular in China and hasthe advantages of specificity, sensitivity, rapidness, high efficiency and the like; and a standard curve established by utilizing the standard substance templates in a matched manner can be used forcarrying out quantitative detection on RNAs of all PALV serotype strains in clinical samples, and thus, the working efficiency is increased greatly.

A vaccine including outer membrane vesicles from Neisseria meningitidis serogroup A may be used to protect humans against disease caused by meningococci of serogroup A. A process for producing such outer membrane vesicles is also disclosed.

Analysis of compositions that include saccharides having mannosamine residues, such as the capsular saccharide of N. meningitidis serogroup A, is facilitated by a method comprising the steps of: (i) hydrolysing polysaccharide in the sample, to give a hydrolysate; (ii) subjecting the hydrolysate to liquid chromatography; and (iii) detecting any mannosamine-6-phosphate separated in step (ii).

The invention relates to a real-time fluorescent quantitative RT-PCR detection primers, probe and kit for Palyamserogroup virus, and belongs to the technical field of animal virus molecular biologicaldetection. The kit comprises an upstream primer, a downstream primer, the probe matched with the primers for use, a negative control template, a positive control template, a standard template and a PCR amplification reagent. The kit is adopted for detection, the reaction speed is high, and the whole amplification process is less than 1 hour; only virus RNA needs to be extracted, reverse transcription is not needed, operation steps are few, easy and convenient, and RNA degradation and pollution can be effectively avoided; meanwhile, after qRT-PCR amplification is completed, whether PALV RNA exists in a sample to be detected or not can be directly judged without agarose gel electrophoresis; and in addition, a standard curve established with the help of the standard template can be used forquantitatively detecting the PALV RNA in the clinical sample, so that the working efficiency is greatly improved, and the detection cost is reduced.

The present invention discloses a rapid high yielding purification process for Neisseria meningitidis serogroup X capsular polysaccharide. The capsular polysaccharide of present invention is capable of being used in the production of economical monovalent capsular polysaccharide or polysaccharide protein conjugate vaccine or multivalent combination vaccines as well as a diagnostic tool against meningococcal serogroup X infections. The process employs simple salts and lesser quantity of ethanol. The process is rapid, economic and scalable with high yield of purified polysaccharide of Neisseriameningitidis serogroup X.

An 85kDa antigen from Neisseria meningitidis and Neisseria gonorrhoeae has been cloned, sequenced and expressed. The antigen is common to diverse strains, serogroups and serotypes of N. meningitidis, and also to N. gonorrhoeae, N. polysaccharia and N. lactamica. The protein sequences of N. meningitidis (serogroups A and B) and N. gonorrhoeae are highly homologous.

In one aspect, the invention relates to use of a composition including a first polypeptide and a second polypeptide, wherein the composition elicits an immune response against Neisseria meningitis serogroup B strains expressing, for example, variants A02, A28, A42, A63, A76, B05, B07, B08, B13, B52 and B107.