from my understanding this is usually transmited though fecal matter and more likely to be contracted to puppies raised in kennels. i just typed in the word coccidia in my web browser and there is alot of info on it
Stress will weaken the immune system so the body canít properly defend it self from opportunistic organisms like coccidia, giardia and others. It wonít create the organism, but it will make a slight manageable and unnoticeable infection much worse
this is why a perfectly healthy looking puppy would get sick few days after he is separated from his littermates and mom while the rest of the pups show no signs what so ever of any illness. When that happens, the breeder often says since none of the other pups is sick, most likely your pup got sick elsewhere, which is often not the case. Most diseases have incubation period of 1-2 weeks before symptoms are shown. So if your pup got sick with in few days, it most likely left the breeder with the disease.
This is not necessarily true. Coccidia can thrive in sanitary clean environments too. Bad sanitation will of course make it worst, but it is not required.
Coccicidia is virtually impossible to get rid off. Most disinfectants, including bleach, are not effective against it. The eggs can survive in the ground for months and it can happily and unnoticeably live inside adult dogs without causing any problems and be shade to the outside environment at any time. This is very hardy organism.
Cleaning with plenty of water will help to wash it away from hard surfaces and reduce its numbers, but you canít eliminate it completely, especially from the ground. The best way to fight it is by routinely drugging the pups until they are about 12 weeks old. This is when they develop a natural immunity to it and can easily fight it off.
Stress can activate the coccidia that may be present in a puppy as stress affects the immune system. Lice and worms are a different story. Did you receive a health certificate with your puppy and take it to the vet when you received it? Only a fecal float can tell if that type of worm is present and a good coat examination could tell if the lice were present.