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|  | AMPROLIUM / Amprol or Corid « Thread Started on Jun 19, 2007, 2:59pm » | |
AMPROLIUM (Amprol or Corid--Merck)
USED FOR COCCIDIOSIS - Very common disease.
SYMPTOMS Pale birds; bloody droppings; ruffled feathers; deaths. One celled parasite - coccidia - 9 species. Host specific; immunity specific. Coccidia - need moisture, O2, and temperature.
PREVENTION Prevent by keeping birds dry; feed 0.0125% Amprol continuously to 8 weeks of age. Amprol @ 1/3 oz. Powder/gallon water 10-14 days for treatment.
AMPROLIUM Amprol or Corid
ANTHELMINTICS
DRUG NAME: AMPROLIUM (Amprol or Corid--Merck)
SPECIES Most
FORM/ROUTE Solution (9.6%) Water
DOSAGE/INTERVAL/DURATION 4 ml/gallon 5 days / 2 ml/gallon 5 days or longer
NOTES & REFERENCES: For Rx of coccidiosis. McDonald, 1989 Some strains in mynahs & toucans may be resistant. Clean cages live steam. Supplement B Vitamins Harrison and Harrison, 1986.
COCCIDIOSIS Coccidiosis is one of the oldest and most widely known diseases of poultry, Although there are good effective treatments and preventive medications (coccidiostats) for coccidiosis, it still occurs quite frequently in chickens today.
Coccidiosis is a disease caused by the invasion of the intestinal wall with coccidia, a type of microscopic one-cellular animals caused protozoa.
There are basically nine kinds of coccidiosis in chickens. One kind: Eimeria tenella, causes cecal coccidiosis, where blood is found in the two blind pouches (ceca) of the chicken-gut, and in chronic or healed cases a yellow core ("cigar") can be found in the ceca. The other eight kinds infect the small intestine.
The two most important ones are Eimeria Acervulina and Eimeria Necatrix. Both damage the intestine severely and can cause morality, unthriftiness and loss of egg-production. Turkeys have their own kinds of coccidiosis, different from chicken varieties. There are seven species of coccidiosis found in turkeys.
A mild coccidiosis infection is not very harmful and is actually necessary to create immunity in the future laying hen, if she is to live on the floor.
Coccidiosis organisms develop little eggs (oocysts) in the intestine that are passed in the droppings and can then infect other chickens in the same pen. If chickens are held on wire floor, they cannot get in contact with droppings and will generally remain free of coccidiosis. Wet litter and warm temperature induce a heavy coccidiosis infection in the litter. That's why many coccidiosis outbreaks occur in the springtime (May, June).
Preventively, drugs are given in the chicks starter and grower feed, from day-old until 12-15 weeks of age. Such drugs are called coccidiostats, because they inhibit the growth of the coccia, but leave enough coccidia alive to permit the build-up of immunity to coccidiosis in the growing pullet.
In broilers, no immunity against coccidiosis is needed because of their short life span. Therefore in broilers we frequently use coccidiostats that completely inhibit coccida build up. Severe infections of coccidiosis will result in young chickens being sleepy and sitting with ruffled feathers. In cases of cecal coccidiosis, dropping will contain blood. Heavy mortality can result if treatment is not started immediately.
Treatment consists of drugs such as liquid amprolium or sulfa drugs (Sulmet, ESB3 or Whitsyn), but one should be careful with sulfa drugs, as they can be toxic when given too long or in too high dosages.
Never give sulfa drugs to laying hens. In E. Necatrix infectious blood may occur in the intestine and mortality can be 1% per week or more. E. Acervulina infections are less dramatic, but tend to be more chronic in nature with long term damage to the intestine and resulting in smaller, unthrifty pullets that do not produce enough eggs.
If chickens appear sick and ruffled from coccidiosis, get a diagnosis at a diagnostic laboratory. It can be made quickly and medication started immediately.
Amprolium (Corid) - for treating coccidiosis; very safe. (See recommended dose under coccidiosis).
Sulfaquinoxaline or Sulfamethazine - water or feed; less safe; somewhat toxic to bone marrow. Withdrawal - 10 days.
http://www.sp.conn.edu Poultry Diseases and Medication for Small Flocks
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