Bernhard:Social benefits require a community: the influence of colony size on behavioral immunity in honey bees
Thank you for posting this article, and I apologize for the delayed reply as I just now had the opportunity to read it.
Two things from the article stuck out to me:
1. Meunier's definition of social immunity: any collective or individual mechanism that has emerged and/or is maintained at least partly due to the anti-parasite defense it provides to other group members.
Suggesting further support for genetic diversity within a colony contributing to overall survival.
2. Optimal colony size: The author references a 1985 Harbo study that suggests that the optimal colony size is 9,000 bees, which is quite small indeed.