Read this for a more scientific explanation . https://www.merckvetmanual.com/poultry/coccidiosis-in-poultry/coccidiosis-in-poultry
Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
Okay, thanks, great information.Low coccidia counts are normal as coccidia are always present in the soil. Normal immune systems support normal body functions, digestive tract moves material through and doesn't allow coccidia to conduct their life cycle and multiply and there are too few coccidia to cause problems.
Abnormally high coccidia populations in the soil caused by wet warm conditions can get into the chicken's intestines at a much higher amounts, thus overwhelming the system, causing coccidiosis as the intestinal lining becomes inflamed from so many coccidia.
What prevents them from getting sick is that the chickens build up resistance to a particular coccicia strain, and they are unable to find a happy environment to dig in to conduct their life cycle.