Serology, chemistry, and genetics of O and K antigens of Escherichia coli.

Abstract

Cross-Reactions Between E. coli 0 Antigens and Antigens Outside the Enterobacteriaceae Group .669

Control of infections due to extended-spectrum β-lactamase-producing organisms in hospitals and the community

“…Outbreaks in these places had an identical time course. This suggested a common-source outbreak, although no source was identified, and analysis is complicated because the O25 gene can be transferred among strains [16], and also because the different clone occurred in different proportions at different sites, with A, B, D and E in Shropshire, but A alone in Southampton, and A and C in Belfast. A further complication is that not all hospitals were ideally identifying ESBL producers, or even identifying urinary isolates to species level.…”

Enterotoxigenic Escherichia coli Infections in Newborn Calves: A Review

“…known whether they contribute to virulence. Each of these structural antigens can be identified and typed by serological techniques (104). The various antigens within each group are designated by number, and when all antigens are known for a particular strain, they comprise the serotype of that strain.…”

“…Under the electron microscope they appear as a dense mat of fibrous projectiofis and are similar to the glycocalyx on other bacteria (Figures 4 and 5). Capsules originally were divided into L, A, or B subtypes based on their behavior in serological tests after heating at various temperatures; however, the original criteria for separating K antigens into these three subtypes are no longer valid (104). However, the designation of type (A) has been retained for K antigens that designate discrete capsules that occur in combination with somatic (O) antigens 8, 9, 20, and 101 (104).…”

“…Capsules originally were divided into L, A, or B subtypes based on their behavior in serological tests after heating at various temperatures; however, the original criteria for separating K antigens into these three subtypes are no longer valid (104). However, the designation of type (A) has been retained for K antigens that designate discrete capsules that occur in combination with somatic (O) antigens 8, 9, 20, and 101 (104). There are approximately 70 K groups in total (104); however, only 11 have been identified commonly on calf ETEC (Table 1), and most of these are of the (A) type.…”

Chemical Reporters for Exploring Microbiology and Microbiota Mechanisms

“…For example, 80 capsulars erotypes have been reportedf or E. coli,a nd 93 capsular serotypes have been reported for Streptococcus pneumoniae. [48,49,51,52] To label CPS, the Kasperl aboratory showed that an azide derivativeo fG alNAc (GalNAz;F igure 7E), can be used for metabolic labeling and Figure 6. Peptidoglycan metabolite photoaffinity reporters.…”