06 - E. Coli O157 and Listeria Monocytogenes, Yersinia Enterocolitica

Question 1

1. Human clinical manifestations of E. Coli O157:H7?

Answer 1

bloody diarrhea, low grade fever +/- death in children <5yo and elderly

Leading cause of acute kidney failure in children (hemolytic uremic syndrome)

Question 2

human clinical manifestations in listeria monocytogenes

Answer 2

meningitis/encephalitis, stillbirth/neonatal death, bacteremia, endocarditis, localized infection/abscess, gastroenteritis/fever

Question 3

clinical manifestations of Y. entercolitica

Answer 3

appendicitis-like syndrome (acute enterocolitis, mesenteric lymphadenitis)

Question 4

(E. Coli)

What age group at greatest risk for these infections?

Answer 4

children < 5 yr and the usual suspects

Question 5

How can you protect you and your family from these pathogens?

Answer 5

Household = cook raw food of animal origin, wash raw vegetables, avoid cross-contamination in the kitchen, don’t consume unpasteurized milk +/- avoid soft cheeses, reheat leftover foods or ready to eat foods, avoid foods from deli counters

Question 6

Which food products is there “zero tolerance” for? What does this mean?

Answer 6

E. coli O157 and Listeria. If there is any sign of dangerous substances on food products they are considered adulterated and unfit for human consumption. Also can mean there can be no sign of fecal contamination on meat carcasses.

Question 7

reserviors for e. coli

Answer 7

ruminants. Can get it through undercooked meat, veggies, animal contact, unpasteurized milk

Question 8

reservoirs for listeria monocytogenes

Answer 8

ubiquitous in nature. Grows in refrigerator temps. Get it through contaminated food (veggies, meat, milk, soft cheese, ready-to-eat foods like hot dogs when they aren’t heated up)

Question 9

reservoirs for y. enterolitica

Answer 9

Yersinia enterolitica = grows in fridge on your food.