Bot fly

Definition: chronic infectious parasitic disease of equine caused by larvae (bot) or adult worm of gastrophillus, characterised by chronic gastritis, loss of condition

Etiology:larvae or adult fly of gastrophillusG. nasalis, G. intestinalis, G. haemorrhoidlis

Distribution: wide distributed, present in Egypt

Species affected: all species of equine

Incidence: summer

egg

Ingest larvae through licking of leg

Migrate to stomach and some larvae migrate to brain , heart, lung Pass with

faeces after 10-12 month

Change to adult

Emaciation and colic Shying and head tossing due to fly

annoyance When the larvae present in rectum

occurs itching and prolapse to rectum

Congestion, swelling and hemorrhage in stomach

Direct detection of eggs on the hair in summer

Detection of larvae in faeces

Rectal ename by water and soap for removal of larvae adhering on rectal mucosa

ivermectin

Grooming of animal, clipping of hairs and burning it

Prophylactic treatment by anthelmentic