The coccidia parasite life cycle begins with the formation of Oocyst. Oocyst is an immature coccidia organism that contains eight parasites. They are shed and passed in the feces of infected pets, and are very stable in the environment to the point that they can survive for a year and beyond. Under right conditions of temperature, the coccidian oocyst will sporulate or convert into pores and are first ingested by intermediate host such as mice and rodents. When inside the intermediate host they do not multiply but they develop partially, and form into dormant tissue cyst. This makes it more dangerous especially if the intermediate host dies and rots.
When dogs consume the intermediate host whether or not they are alive, the coccidia parasite life cycle can be completed. Since the dog are definitive hosts, the coccidia parasites will then divide into hundred of daughter cells through asexual reproduction. The daughter cells, in due course, break out of the gut walls and invade new areas, and multiply in hundred folds again. By the 10th or 14th week, the coccidian oocyst has already multiplied into millions of coccidia parasites.
During this stage, some coccidia parasites attach to the gut wall, and develop into male and female sex cells allowing further replication of oocyst into the gut wall and around them. Aside from the dog parasite that resides and destroys the intestinal tracts, the oocyst is also shed into the dog feces and starts a new coccidia parasite life cycle again. This can happen when the oocyst is eaten by other animals.
When the other dogs at home eat the infected feces, the coccidian oocyst is transmitted and starts another coccidia parasite life cycle in your dogs. The danger of this is that coccidia may be transmitted and infect all of your doggies at home especially when not immediately given attention.