Anyhow, I was thinking about this in relation to treatments of cavies with ivermectin and other drugs, and the fact that many breeders and pet owners routinely treat their pigs every few months.
I´ve looked around on the Net and found that there are a number of parasites with ivermectin-resistant strains, including:
haemonchus contortus (barber´s pole worm), which can kill sheep and goats;
cooperia curticei, which also affects sheep and goats;
trichostrongylus colubriformis, which causes diarrhoea and possibly death in a range of animals (including rabbits) and
parelaphostrongylus tenuis, which apparently affects llamas, alpacas, etc.
Apparently there are other antibiotics that can successfully treat these strains, and I´m not suggesting that the small number of treatments of domestic guinea pigs (or horses) would have anywhere near the impact that mass livestock dosing would.
Nonetheless, it rings a few bells of concern in my head, particularly in light of the fact that there are now ivermectin-resistant strains of nematodes which cause the tropical disease river blindness in humans (which affects 20 million people).
Does anyone have any thoughts on this?
Barber´s pole worm:
Ivermectin resistance in horses and other livestock:
- Little Jo Wheek
I haven´t had anything contagious affect more than a single pig (and only new ones in quarantine at that) for close to seven years now. I used to have outbreaks of URIs and lice prior to that (2-3 pigs at a time). I wasn´t a very knowledgeable kid and those were the days of showing and breeding. But then, I was not very old at all. Fifteen, sixteen. I didn´t know half as much about cavy care and medical physiology then.
The resistances being observed are in some nematodes and worms -- which I don´t think we treat cavies for.
Mites are arachnids. I didn´t notice any resistance being noted in mites.