Serotypes of group B meningococci.

Classification of Neisseria meningitidis group B into distinct serotypes. 3. Application of a new bactericidal-inhibition technique to distribution of serotypes among cases and carriers.

Neisseria meningitidis group B was subdivided into a number of different serotypes. A sensitive microbactericidal assay procedure was developed, and, with this method, over 10 different serotypes were provisionally established. The method by which distinct serotype designations were assigned is described. Almost half of the strains examined thus far contained a common serotype antigen which was...

Human opsonins to meningococci after vaccination.

Two groups of volunteers were immunized with either a serogroup A plus C meningococcal polysaccharide vaccine or a combined serogroup B polysaccharide-serotype 2 protein vaccine. Serum opsonin responses were measured by chemiluminescence of polymorphonuclear leukocytes exposed to opsonized live meningococci. Two of the six volunteers immunized with the A plus C vaccine had an increase in serum ...

Serotypes of Neisseria meningitidis isolated from patients in Norway during the first six months of 1978.

During the first 6 months of 1978, 114 strains of Neisseria meningitidis isolated from patients in Norway were serotyped. Among 27 group C strains, type 2 was most common, whereas 82% of the 82 group B isolates did not react with antisera to the standard serotypes 1 to 12. These strains were shown to belong to a new serotype, type 15. Also some group A and C strains had the type 15 antigen. Inv...

The prevalence of 027 variation in B group Sallmonella serotypes isolated in Iran

Identification of Different Serotypes of Infectious Bronchitis Viruses in Allantoic Fluid Samples with Single and Multiplex RT-PCR

Background and Aims: Infectious bronchitis virus (IBV) causes an acute, highly contagious respiratory and kidney disease of chickens which results in significant economic losses in commercial broilers, layers and breeders. Rapid identification of IBV serotypes involved in respiratory complex is a problem in the differential diagnosis. Materials and Methods: In this study, a single and mul...