E. Coli Bacteria

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From the patient, unknown bacteria #618 was identified to be Escherichia coli. It is apart of the Enterobacteriae genus that according to Brown’s Microbiological Applications1 are gram-negative bacteria that usually live inside the intestines of animals and humans. The organism can also live in the vagina and urethra. The data collected after isolating the organism and executing a series of tests have confirmed previous observations of E. coli in past scientific history. For the majority of the tests conducted – including morphological and cultural characteristic tests, oxidative and fermentative reactions, hydrolytic and degradative reactions, and multiple test media- the observed results matched the expected results. The lack of variability …show more content…
coli is commonly found in the intestines of cattle and can become linked with meat if fecal matter from the animal’s intestines contaminates the meat during the butchering process². E. coli is then mixed into the hamburger meat during grinding and processing. Serious illness results from eating improperly cooked hamburger meat because cooking temperatures are cannot sufficiently kill the organism. Transmission of E. coli has also occurred when fecal matter of cattle contaminated fruits and vegetables such as lettuce, spinach, and celery. Their presence in food and water indicates that fecal contamination has occurred and that there is a high potential for the spread of serious disease such as typhoid fever, bacillary dysentery, cholera, and intestinal viral diseases1.
There have been observed structural characteristics of E. coli that support this hypothesis. First, E. coli occurs mainly in the intestines of humans and some warm-blooded animals and it is not found routinely in soil and water. Secondly, the organism can be easily identified by multiple microbiological tests. Thirdly, E. coli is not as fastidious as the other intestinal pathogens, and therefore it survives longer in water
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coli is an important opportunistic pathogen. Normally, E. coli is found in vast numbers as a resident of the colon; however, it can grow outside its normal body site and cause urinary tract infections, sepsis, wound infections, and meningitis1. The most common UTI caused by E. coli is the infection of the bladder (cystitis). This makes sense because, most infections involving E. coli are endogenous, meaning the resident E. coli of the commensal microbiota established the infection when it grew outside of its natural body site. E. coli can also cause clinical disease in immune compromised patients such as the elderly. The diagnosis of E. coli found in an elderly woman, Doris, makes sense especially with someone who has a history of UTI and kidney infections.
Additionally, this species can acquire virulence factors encoded on their plasmids or in bacteriophage DNA, causing some strains to have enhanced virulence. E. coli 0157:H7 is a particularly virulent strain that has been linked with multiple kinds of contaminated food and has caused many deaths². This strain of E. coli forms a toxin that destructs blood vessels and causes very severe

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