aim : the purpose of this study was to characterize phenotypically and genotypically the serotypes of the e. coli o111 associated with diarrheal disease and assess the variation among serotypes in terms of specific virulence factors and hela cells adherence patterns. background : escherichia coli o111 serogroups are prevalent in endemic or sporadic cases of diarrhea, especially in developing ar...

We developed immunoglobulin M (IgM) antibody capture enzyme-linked immunosorbent assays (ELISAs) with four monovalent dengue virus antigens. We attempted to determine whether IgM responses in dengue virus infections are serotype specific or serotype cross-reactive. Serum samples from 14 confirmed dengue cases were examined. In these 14 cases, which consisted of 12 Japanese and 2 non-Japanese pa...

The National Rotavirus Reference Centre, together with collaborating laboratories Australia-wide, conducts a laboratory based rotavirus surveillance program. This report describes the serotypes of rotavirus strains responsible for the hospitalisation of children with acute gastroenteritis during the period 1 July 2006 to 30 June 2007. One thousand and two faecal samples from across Australia we...

Streptococcus pneumoniae serotype 19A remains a significant cause of invasive pneumococcal disease (IPD) in Ireland despite the successful introduction 13-valent conjugate vaccine (PCV13) 2010 which reduced overall incidence IPD children. Invasive isolates from Irish reference laboratory between 2007–08 and 2017–18 were analysed using whole genome sequencing (WGS) to investigate persistence thi...

Changes in serotype distribution have been described after the switch from 13-valent pneumococcal conjugate vaccine (PCV13) to 10-valent (PCV10) Belgium. To describe serotype’s invasive disease potential and detailed evolution of antimicrobial susceptibility isolates (carriage IPD) children up 30 months age over a period during (2015–2018). S. pneumoniae strains isolated nasopharynx healthy att...

Thirty-one strains of Yersinia enterocolitica were isolated from food and surface water. During the period of January 1975 to June 1977, 157 strains from 143 human cases were also isolated. Among the different serotypes from nonhuman sources, serotypes 6,30 and 4,32 were the most common. Serotype 4,32 was present only in food and not in water. Serotype 3 was isolated only from humans. Among the...

Streptococcus pneumoniae isolates of serotypes 1, 4, 6B, 7F, 14, and 19F belonging to clonal types with known invasive disease potential in humans were used to infect C57BL/6 and BALB/c mice. Most isolates were able to colonize the nasopharynx for 7 days. One serotype 19F isolate of the clonal type ST162 had higher bacterial numbers than other isolates and clonal types of the same serotype. Ser...

BACKGROUND Serotype 19A invasive pneumococcal disease (IPD) increased annually in the United States after the introduction of the 7-valent conjugate vaccine (PCV7). To understand this increase, we characterized serotype 19A isolates recovered during 2005. METHODS IPD cases during 1998-2005 were identified through population-based surveillance. We performed susceptibility testing and multilocu...

Monoclonal antibodies (MAbs) to the lipopolysaccharide (LPS) O-antigens of Campylobacter fetus serotype A and B strains were produced. Eight MAbs specific for serotype A LPS were characterized on immunoblots of C. fetus serotype A LPS. Two immunoblot patterns were observed and were used to divide the eight MAbs into two groups. MAbs M1177 and M1194 were selected as representative of the two gro...

Rabies and rabies-related virus strains were studied by using a panel of monoclonal antibodies directed against either nucleocapsid proteins or cell surface antigens of Mokola virus (Mok-3). Each strain was used in parallel to infect cultured cells and mice. Then, the patterns of reactivity of the different monoclonal antibodies were determined by the immunofluorescent-antibody staining procedu...