| Haematobia irritans | A major pest of cattle in the Northern Hemisphere that transmits the filarial parasite Stephanofilaria stilesi. Synonym: Haematobia irritans. (05 Mar 2000) |
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| Pulex irritans | The human flea, a common flea that infests humans, many domestic animals (especially swine), and wild mammals and birds; a poor vector of plague. (05 Mar 2000) |
| Siphona irritans | The horn fly, a bloodsucking muscoid fly that causes great irritation and annoyance to cattle, and transmits Stephanofilaria stilesi. Origin: G. Siphon, tube (05 Mar 2000) |