Deworming: Readers Worry Most About Strongyles

More than 390 readers of responded to a poll asking, "What is your most important parasite concern?"

results of poll on parasitic worms

Results were as follows: 

  • Small strongyles (cyathostomes): 26.08% (103)
  • Large strongyles (bloodworms): 23.04% (91)
  • Tapeworms: 15.70% (62)
  • Bots: 11.90% (47)
  • Other 10.13% (40)
  • Ascarids (roundworms): 9.37% (37)
  • Pinworms:3.80% (15)

Readers shared what they worry about when it comes to parasitic worms and their horses in the comments below.

Poll sponsored by Intervet Schering/Plough Animal Health.

Results of weekly polls from are published in The Horse Health E-Newsletter. Published every week, this e-newsletter offers news on diseases, veterinary research, health events, and in-depth articles on common equine health conditions and what you can do to recognize, avoid, or treat them. Sign up for our e-newsletters using the form above or on our e-newsletter page.  

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  • all of the above are a concern for me
  • all parasites are worrysome
  • Rescue dog we were fostering shed a tapeworm, took precautions w/all animals we have!
  • all parasites are of concern, but the hard to kill ones worry me
  • All
  • Tail rubbing drives me crazy. I find tub paste takes a while to show any improvement.
  • Tapeworms and their connections to impaction colic/difficulty detecting in fecal tests
  • These seem to be the most detremental to the older horses
  • encysted strongyle larvae
  • both large and small strongyles no problem with all the rest
  • all of them are most important!
  • are even resistant to panacur power pack
  • Resistance!!
  • my real concern is growing resistance to available anthelmintics
  • I consider all parasites important when it comes to my horses
  • neck threadworms
  • Deworming the senior horse
  • Drug resistance for any internal parasite
  • combo of all, whatever would be present to harm my horses.
  • liver flukes from irrigation water
  • Have to say to me, They all are!!
  • not worried, do fecals twice yearly
  • Anything else I can handle! I haven't seen bots on my horse, so not worried about those.
  • all of them. I do regular fecal checks.
  • encysted small strongyles until they come up with a new "worm of the day"
  • resistance
  • I had a horse colic from bots once - it took month for her stomach to recover! now worm every month
  • All of them?
  • culacoides gnats
  • do not know
  • My horses are regularly wormed, but last year bot flies were BAD!
  • all of the above
  • seeing disgusting worm/stomach photos on the web
  • Alll the above, especially bloodworms & bots
  • resistance
  • I worry over all of the worms not just one kind
  • how about "all of the above"? Dogs / Horses / Cats living in close vicinity
  • Wormer resistance.
  • Small strongyle RESISTANCE
  • I have a 16-wk old colt, so ascarids are the number 1 baddie for me right now
  • All of t he above plus ticks carrying many diseases
  • all of them
  • Ticks are the parasites I have a problem with.
  • Parasite resistance to drugs over time.
  • Managing different horses- fecal eggs counts, etc.
  • No worries
  • Fecal counts have been negative for 1 yr now. I do not have bots so I am not concerned.
  • I think that any that migrate through tissue and blood vessels pose the most danger
  • onchocerciasis - inability to easily diagnose and eliminate adult parasites from hypersensitive horse
  • hookworms
  • all of the above.
  • large strongyles mostly in our area..
  • I'm concerned about all parasites.None do the horses any favors
  • As far as I'm concerened, they are all pretty much serious.
  • ALL of them!! and i have a hard time remembering what to give seasonally

About the Author

Megan Arszman

Megan Arszman received a Bachelor of Science In print journalism and equine science from Murray State University in Murray, Ky., and loves combining her love of horses, photography, and writing. In her “free time,” when she’s not busy working as a horse show secretary or riding her American Quarter Horses on her parents’ Indiana farm, she’s training and competing her Pembroke Welsh Corgi and Swedish Vallhund in dog agility and running.

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