The UK, probably EU, requires it, iirc.
Salmonella is supposedly an almost normal part of every chicken, passed into to eggs in the laying process, and that’s what usually causes illness, but nobody (apparently) wants antibiotics in their chicken. In fact, it’s a selling point. Pasteurization would kill salmonella. But, yeah, if you include 0.05¢, to every chicken, that’s really gonna eat into the profits, right? Reminds me of about 40 years ago, some genius bean counter at Enfamil or Similac, or some such formula company, decided to leave out the salt in baby formula, to save the company a few THOUSAND bucks a year, and of course, babies started DYING, before someone figured it out, because, of course, humans cannot live without salt.