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ARTHROPODS

BOTS (Gasterophilus)
Bots are not actually worms as they are in fact flies. Bots are an internal parasite of the horse as part of their lifecycle involves internal development. The fly lays it's eggs on the abdomen, legs and throat of the grazing horses in late summer.  When they are then licked off by the horse the larvae are stimulated and the larvae hatch and burrow into the lining of the gums. They migrate to the stomach after about one month which becomes inflamed and ulcerated and eventually (some 10 months later) are passed out in the dung. Bot eggs can be seen on the horses coat during summer and early autumn and can be removed with special bot knives or bot scraping blocks. The entire population of Bots reside in the stomach over winter so that is why traditional thinking was to treat with Ivermectin or Moxidectin based products preferably in December or January as the adult bot flies are killed of by freezing temperatures but as weather patterns are changing leading to milder winters without early frosts it might be advisable to treat twice per year. If treatment is given before the bot flies have stopped egg laying then the larvae will still be capable of causing damage throughout the winter and into spring. If treatment is delayed until after the first frost, then the larval stages burrowing in the horses mouth and stomach, are capable of causing problems. Therefore it is important to use products capable of killing all stages of bots perhaps during summer and autum whilst the flies are still active and then again later in the winter after a true hard frost.

[SMALL REDWORM]  [TAPEWORM]  [BOTS] [HAIRWORMS]  [ASCARIDS]  [PINWORMS]  [ROUNDWORMS] [LUNGWORMS][THREADWORMS]