| flea be | 0.72 | Fleas are more than annoyances. | ||
| flea transmit | 0.59 | Bubonic plague is a contagious disease transmitted by fleas from infected rats. | ||
| flea spread | 0.39 | Fleas also spread disease, both to pets and people. | ||
| flea carry | 0.33 | It comes from bacteria carried by fleas from infected rats. |