A row of hives, a hive tool doing its rounds, and one infected colony — American foulbrood (AFB)-style — that is either contained by good biosecurity or spread further by a beekeeper who skips the basics: cleaning tools between hives, quarantining new stock, and reporting suspected disease promptly.
Each time the glowing hive tool visits a hive, contamination can transfer:
P(spread) = P_base × (1 − hygiene / 100)
P_base = 35%).hygiene% chance of cleaning the tool — the higher the slider, the faster contamination gets wiped out before it reaches the next hive.report-delay days after infection starts — shorter delays (frequent inspection, fast reporting to the National Bee Unit / BeeBase) limit how long a hive can keep contaminating the tool.American foulbrood spores can survive for decades in old comb and equipment, which is why the UK's statutory response to a confirmed case is destruction of the colony and contaminated equipment by burning — no approved treatment reliably eliminates the spores from live comb.
A 3D apiary where you control hive-tool hygiene, new-colony quarantine length and inspection/reporting speed, then watch whether a foulbrood-style infection stays contained or spreads down the row — with a fenced quarantine pen for every new colony you introduce.
A glowing hive tool carries contamination from an infected hive to the next healthy one it visits unless the beekeeper cleans it; infected colonies are eventually reported and destroyed, and new colonies can smuggle in a hidden infection if quarantine is too short.
Raise hygiene to slow transmission, shorten the reporting-speed slider to catch outbreaks sooner, set a longer quarantine period, then click "Introduce a new colony" and watch it clear the fenced pen — or get caught red-handed.
American foulbrood spores can survive for decades in comb and equipment, which is why UK law treats it as a notifiable disease requiring destruction of confirmed colonies by burning rather than treatment.