Nurse anesthetists have been providing anesthesia care to patients in the United States for more than 150 years. The credential CRNA (Certified Registered Nurse Anesthetist) came into existence in 1956.
E. coli Replication Origin. The E. coli replication origin oriC is an â240-bp DNA segment present at the start site for replication of E. coli chromosomal DNA. Plasmids or any other circular DNA containing oriC are capable of independent and controlled replication in E. coli cells.. coli Replication Origin. The E. coli replication origin oriC is an â240-bp DNA segment present at the start site for replication of E. coli chromosomal DNA. Plasmids or any other circular DNA containing oriC are capable of independent and controlled replication in E. coli cells.
The pathogenic E. coli strains have been divided into four groups according to their mechanism of virulence; Enteropathogenic, Enterotoxigenic, Enteroinvasive, and Enterohemorrhagic. (5) Enteropathogenic E. coli (EPEC) strains are a common cause of infant diarrhea in areas of poor sanitation. (5) The cause of travelers diarrhea are Enterotoxigenic E. coli (ETEC) strains, which produce enterotoxins that cause a gastroenteritis that is similar to a mild form cholera. (5) Enteroinvasive E. coli (EIEC) strains produce an invasive factor that produces a shigellosis-like dysentery in humans.