Haunted is correct. Here's some info on vaccines:
http://www.thepoultrysite.com/publications/2/Coccidiosis Management/47/vaccines
A vaccine, like Amprolium, helps build immunity by limiting the amount of Thiamine (vitamin B2) which coccidia feed upon. The ignorant will tell you it is a Thiamine "blocker", and drugs are bad for your birds. They have two choices, let the bird die, or treat the bird so that it may survive. The truth is the chicken still absorbs Thiamine in its diet, it is just limited during treatment. This is also why vitamin supplementation is beneficial before and after treatments. B vitamins are not fat soluble, so they pass through the bird's system quicker.
Coccidia are still present in the environment, and the chicken ingests some of it. Probiotics in the water are very helpful because they protect the intestinal lining by forming a barrier against the protozoan. I start chicks out from day 1 by using probiotics (Probios soluble powder). I also use vitamins-electrolytes in the water a couple times a week.
Oocysts are the eggs from which the protozoan "hatch" or sporulate from. Chickens ingest oocysts and the protozoans sporulate in the bird's droppings. Another bird picks up the protozoan by picking and scratching, and it is spread in the environment. Migratory birds carry it, the wind carries it, and moist warm atmospheres help it survive. It is only when the bird's digestive system is overwhelmed by it that it becomes a health risk. Just like E.Coli, it is in the environment, and vaccinations are not 100% guaranteed.
There are two drugs that are effective against coccidiosis.
1. Amprolium
2. Sulfa drugs (Sulfadimethoxine is the safest of the sulfas) but like all drugs or antibiotics, manufacturer label directions must be followed.
You'll see in Table 4 on the link below, Amprolium is effective against the cecal strains, and Sulfas are effective against the intestinal strains:
http://www.thepoultrysite.com/articles/1138/coccidiosis-control
http://www.thepoultrysite.com/publications/2/Coccidiosis Management/47/vaccines
A vaccine, like Amprolium, helps build immunity by limiting the amount of Thiamine (vitamin B2) which coccidia feed upon. The ignorant will tell you it is a Thiamine "blocker", and drugs are bad for your birds. They have two choices, let the bird die, or treat the bird so that it may survive. The truth is the chicken still absorbs Thiamine in its diet, it is just limited during treatment. This is also why vitamin supplementation is beneficial before and after treatments. B vitamins are not fat soluble, so they pass through the bird's system quicker.
Coccidia are still present in the environment, and the chicken ingests some of it. Probiotics in the water are very helpful because they protect the intestinal lining by forming a barrier against the protozoan. I start chicks out from day 1 by using probiotics (Probios soluble powder). I also use vitamins-electrolytes in the water a couple times a week.
Oocysts are the eggs from which the protozoan "hatch" or sporulate from. Chickens ingest oocysts and the protozoans sporulate in the bird's droppings. Another bird picks up the protozoan by picking and scratching, and it is spread in the environment. Migratory birds carry it, the wind carries it, and moist warm atmospheres help it survive. It is only when the bird's digestive system is overwhelmed by it that it becomes a health risk. Just like E.Coli, it is in the environment, and vaccinations are not 100% guaranteed.
There are two drugs that are effective against coccidiosis.
1. Amprolium
2. Sulfa drugs (Sulfadimethoxine is the safest of the sulfas) but like all drugs or antibiotics, manufacturer label directions must be followed.
You'll see in Table 4 on the link below, Amprolium is effective against the cecal strains, and Sulfas are effective against the intestinal strains:
http://www.thepoultrysite.com/articles/1138/coccidiosis-control
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it has been extremely hot/humid here (VA) also. Heck i am panting and holding my wings out. lol...However they are in the house which is a cool 72° and the brooder is nice and toasty warm for them. So I don't think that is our issue. Hoping the chick snaps out of it. Hoping for the best when I get home. 
