If this were a real concern as you're hypothesizing, then we'd already have the data of olive oil making tons of people sick. Even relatively tiny outbreaks of

If this were a real concern as you're hypothesizing, then we'd already have the data of olive oil making tons of people sick. Even relatively tiny outbreaks of food borne illness from spinach make the news, so where are all the people getting salmonella from olive oil? When the observed data doesn't fit your theory, then you need to reevaluate your theory no matter how much common sense it seems to make. If the figures of the article are accurate, there is something in the neighborhood of one dead bird per ton of olive oil from Portugal. That's enough that if it were poisoning the oil, people would be dropping dead in droves. Consuming olive oil would be like playing Russian roulette.. but it's not.