Foods that allow microorganisms to grow are called parasites.

This is wrong. The kind of food that you described is called potentially hazardous food. This includes things like dairy products and things with wheat and things like that. Parasites are organisms that feed off of other organisms like a bacteria or a fungi or similar things that latch onto a host and feed.

Ithink the correct answer would be that since the disease is passed by a hand shake and can be cured with antibiotics that it could be an infection. an example could be that once when i was working in a bush camp, i got blood poisoning from blood blisters that got infected. our cook did not wash his hands after going to the bathroom and he passed staphyloccus on to the crew he fed. one other person also got a bad similar infection on the side of his face. i had to be rescued by helicopter and taken to the hospital so i wouldn't die!