"Plague Bugs are said to carry disease in their wake, although this is commonly believed to be an old wives' tale."
- Monster summary(src)

Plague Bugs are an Swarm type. They are the most noticeable variant of Swarm because of their light gray look. They are unused, and were supposed to be most likely in Great Marsh.
They drain Stamina with 80% chance on Normal and a 100% chance on other difficulties. Contrary to the name and as implied by the lore, they are not poisonous.
Statistics
Property | Normal | Nightmare | Hell |
---|---|---|---|
Type | Animal | Animal | Animal |
Act(s) found in | 3 | 3 | 3 |
Monster Level | 21 | 48 | 79 |
Experience | |||
Health points | |||
Damage 1 | |||
Attack Rating 1 | |||
Damage 2 | |||
Attack Rating 2 | |||
Defense | |||
% to Block | 21 | 21 | 21 |
Damage Resist | 80 | 90 | 100 |
Magic Resist | 0 | 0 | 0 |
Fire Resist | 0 | 0 | 0 |
Cold Resist | 0 | 0 | 0 |
Lightning Resist | 0 | 0 | 0 |
Poison Resist | 0 | 0 | 0 |
Drain Effectiveness | 0 | 0 | 0 |
Immunities | — | — | Physical |
Chill Effectiveness | 50 | 40 | 33 |
Walk/Run Speed | 7 | — | |
Group/Minion Size | 6-8 | — |
Itchies • Black Locust • Plague Bugs • Hell Swarms