Matthew Poole and continuators on Psalms 78:45

45 He sent divers sorts of flies among them, which devoured them ; and frogs, which destroyed them.

Or, destroyed them; which they might do by their cruel and numerous stings, for these flies were doubtless extraordinary in their nature and quantity, and poysonous and hurtful qualities. And the like is to be thought concerning the frogs here following, who also might destroy the people by infecting the air with their stink, and corrupting their meats and drinks.

Marginal references: Exod. 8. 24▪; Exod. 8. 6.