Initially, we advised against eating raw beef, due to a lack of experience on the matter.
Not so much anymore.
You just need to make sure to consume high quality (tenderloin), non-grounded beef,
preferably previously frozen. (freezing has been shown to be effective against topical E coli)
The biggest 'threat' seems to be E.coli O157:H7 (
Escherichia coli)
(which produces Verocyto or Shigellalike toxins, damaging the colon barrier)
Harmless strains of E. coli are naturally present in the human colon,
and involved in the production of vitamin K2 and protection against bad bacteria.
E. coli O157:H7 may multiply between 8°C and 45°C.
Contamination of meat may occur due to poor hygiene in the production process (slaughter, cutting),
as E. Coli O157:H7 is present in the colon of cows.
Mostly associated with eating undercooked ground beef, drinking unpasteurized milk,
swimming in or drinking contaminated water, and eating contaminated vegetables.
Most people recover without antibiotics or other treatment in 5–10 days.
Symptoms: usually mild diarrhea.
Sometimes bloody diarrhea due to damage to the colon or kidneys.
1.25% of E. Coli infections is lethal due to kidney failure, in young children, elderly or people with a poor defense.
8% develop lifelong complications, such as high blood pressure, seizures, blindness, paralysis.
Treatment with antibiotics may increase this risk. (
Wong CS et al. "The risk of the hemolytic-uremic syndrome
after antibiotic treatment of Escherichia coli O157:H7 infections.". 29-06-2000; N Engl J Med 342 (26): 1930–6)