okay... I will try to translate what I know about Salmonella...
There are many different kinds of Salmonella and not all are virulent.
almost every animal can be infected and if they will get sick depends on the Serovar they are infected with and the amount of pathogen.
But they all can carry the germs without getting ill, so called sub-clinical Infections.
In pig Salmonella-infections are a great problem and the fewest really show symptoms, but it is relativly easy to be tested even after death.
In Germany we have for pigs the "Salmonella-monitoring" wich says that depending on the amount of animal in the stable some must be tested (about 30-50%) and then they are classified... it has influence on the money they get and higher risk animals will be killed after the lower ones.
And they must see where the infection comes from. A Vet will be send to their farm.
Salonella infected cows in Germany will be killed.
I haven't heard of anything that strict with chicken
we have a voluntary monitoring of Salmonella in eggs, we had samples about 10 to 12 times a year.
in the 7 years I worked there we found Salmonella only twice and only in the feces of the chicken.
If healthy people consume Salmonella it will do them no harm. At risk are older people, children and people with a low immunesystem.
True, the chickens they ate, they butchered themselves, and had less of a chance of intestinal contamination. However, I know some bacterial contamination had to take place. They didn't have modern refrigeration, so even there wasn't intestinal contamination, there still was probably some bacterial growth.
If the chance of intestinal contamination wasn't that high, don' forget that the overall animal health these days was much worse. Having chicken outside is, from hygienic standards, the worst case
all these horrible things they get!! worms, nematodes, bacteria and so on
so the risk at least on the same level, if not higher.... but people that days just dealt with it, they had a very trained immune system..
and I don't want to tell you about food hanging out somewhere..... just think of flies, bacteria and molds in the air.....
I use the same cutting board but I rinse it under hot water in between... I admit that. But not only for infection reasons but because I don't like that chicken crap an the board.
I use the same knife and I usually cut the meat first....