VTEC Archives | Microbe Notes

Shiga toxin-producing Escherichia coli (STEC)

February 4, 2021November 3, 2019 by Sagar Aryal

The Shiga toxin-producing E. coli (STEC), is also alternatively referred to as verocytotoxin-producing E. coli (VTEC), and enterohemorrhagic E. coli (EHEC). All members of this group are defined by the presence of Shiga toxin 1 (Stx1) or 2 (Stx2). Some but not all EHEC strains are LEE positive and form A/E cytopathology, resembling EPEC strains. The most common serotype associated …

E. coli Pathotypes- ETEC, EPEC, EHEC, EAEC, EIEC, DAEC

February 4, 2021January 12, 2019 by Sagar Aryal

Escherichia coli (commonly abbreviated E. coli) is a Gram-negative, facultative anaerobic, rod-shaped bacterium that is commonly found in the lower intestine of warm-blooded organisms (endotherms). Human Escherichia coli strains are classified as commensal microbiota E. coli, enterovirulent E. coli, and extraintestinal pathogenic E. coli (ExPEC) on the basis of their genetic features and clinical outcomes. Most infections (with the exception of neonatal meningitis and gastroenteritis) are …