Reacções alérgicas a carne...

... por mordedura de carrapatos?
http://www.dailymail.co.uk/health/article-4630654/Lone-Star-ticks-cause-people-allergic-meat.html

Citando:
"The bite causes an allergy to a sugar molecule that's found in red meat, called alpha-galactose, or 'alpha-gal', according to Business Insider.

Dr. Ronald Saff, of Florida State University, said to the news outlet: 'The weird thing about [this reaction] is it can occur within three to 10 or 12 hours, so patients have no idea what prompted their allergic reactions.' 

Victims may have to dramatically alter their diets after the bite because there is no known cure for the alpha-gal allergy."

As notícias sobre o perigo dos gatos de rua desdramatizadas (NHS)

http://www.nhs.uk/news/2016/09September/Pages/cuddling-a-kitten-almost-certainly-wont-kill-you.aspx
Citando:
"But cat lovers can relax – deaths and serious illness from "killer kittens" with so-called cat scratch disease (CSD) are exceedingly rare.
In fact, the study on which this and other headlines are based did not report any deaths, although it estimated 500 people are admitted to hospital in the US each year with the disease.
CSD is caused by bacteria spread among cats by fleas, which can infect humans through scratches and possibly bites from cats.
It causes swollen lymph glands. Some people get more serious infections, leading to inflammation of the brain or the inner lining of the heart."