- 41 Escherichia Coli Often Employed As An Indicator Of Fecal Contamination In Environmental Biology And Accounts For O 1 (78.87 KiB) Viewed 12 times
41. Escherichia coli, often employed as an indicator of fecal contamination in environmental biology; and accounts for over 95% of urinary tract infections in females, utilizes carbohydrate fermentatively producing A) colorless colonies on blood agar B) absence of a periplasmic space in the cell wall C) contain greater than 90% lipopolysaccharide D) colorless colonies on EMB agar E) none of the above identify 42. Bacteroides fragilis, a gram negative anaerobic rod that is predominant in the GI tract and also inhabits the oral cavity A) produces endospores B) retains the primary C) will growth on blood stain after the acetone-alcohol rinse during Gram staining E) agar plates at 37C in the incubator D) grows in the bottom of thioglycolate broth none of the above = identify 43. Non-lactose fermenters on TSI agar correspond to the following: A) pink colonies on EMB agar C) green sheen on EMB agar C) colorless colonies on MacConkey's agar D) either of the above E) none of the above = identify