The National Neisseria Network has undertaken meningococcal isolate surveillance by means of a collaborative laboratory-based initiative since 1994. The phenotype (serogroup, serotype and serosubtype) and antibiotic susceptibility of 323 isolates of Neisseria meningitidis from invasive cases of meningococcal disease were determined in 1998. Ninety per cent of the invasive isolates were either s...

Although serogroup 6 was among the first to be recognized among Streptococcus pneumoniae, several new serotypes were identified since the introduction of pneumococcal conjugate vaccines (PCVs). A decrease of the 6B-2 variant among invasive pneumococcal disease (IPD), but not 6B-1, was noted post conjugate vaccine introduction, underpinned by a decrease of CC273 isolates. Serotype 6C was associa...

salmonella spp. are zoonotic enteric bacteria able to infect humans, livestock and wildlife. the aim of this study was to investigate the prevalence of salmonella (spp.) and to determine antibiotic susceptibility, serogrouping and presence of inva gene (salmonella invasion gene a) in the detected strains in wild captive herbivores in iran. the fecal samples of 103 animals from 8 different sp...

BACKGROUND The incidence of serogroup C and Y meningococcal disease increased in the United States during the 1990s. The cyclical nature of endemic meningococcal disease remains unexplained. The purpose of this study was to investigate the mechanisms associated with the increase in the incidence of meningococcal disease. METHODS We characterized an increasing incidence of invasive serogroup C...

The National Neisseria Network has undertaken meningococcal isolate surveillance by means of a collaborative laboratory-based initiative since 1994. The phenotype (serogroup, serotype and serosubtype) and antibiotic susceptibility of 323 isolates of Neisseria meningitidis from invasive cases of meningococcal disease were determined in 1998. Ninety per cent of the invasive isolates were either s...

Invasive meningococcal disease is nationally reportable in Canada. In recent years, a serogroup C genotype, designated electrophoretic type 15 (ET15), has been the most frequently isolated meningococcal genotype in Canada and has caused epidemics across the country. Between August 1993 and September 1995, there were 9 cases of invasive meningococcal disease caused by a variant of this genotype,...

OBJECTIVES We sought to describe Neisseria meningitidis immunity and its association with pharyngeal carriage in Burkina Faso, where N. meningitidis serogroup W-135 and serogroup A disease are hyperendemic and most of the population received polysaccharide A/C vaccine during 2002. METHODS We collected oropharyngeal swab samples from healthy residents of Bobo-Dioulasso (4-14 years old, n=238; ...

Immunoperoxidase labeling showed that the F-1 antigen of Legionella pneumophila is located on the bacterial cell surface. Protection against lethal intraperitoneal challenge with serogroup 1 L. pneumophila was induced in guinea pigs by heat-killed cells and F-1 antigen from serogroup 1, but not by heat-killed cells or F-1 antigens from serogroup 2, 3, or 4.

Serogroup A meningococci are a leading cause of bacterial meningitis in children and young adults worldwide. However, the genetic basis of serogroup A strains' virulence and their epidemiological properties remain poorly understood. Therefore, we sequenced the complete genome of the transformable Neisseria meningitidis serogroup A strain WUE2594.

BACKGROUND Cholera is endemic in Bangladesh, with outbreaks reported annually. Currently, the majority of epidemic cholera reported globally is El Tor biotype Vibrio cholerae isolates of the serogroup O1. However, in Bangladesh, outbreaks attributed to V. cholerae serogroup O139 isolates, which fall within the same phylogenetic lineage as the O1 serogroup isolates, were seen between 1992 and 19...